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1.
PLoS One ; 19(8): e0306691, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39088560

RESUMEN

BACKGROUND: The worldwide increase in multidrug resistance is a major threat to public health. One particular concern is the presence of Escherichia coli strains that carry Extended-Spectrum ß-Lactamase (ESBL) and Carbapenemase enzymes, which can make multiple antibiotics ineffective. This complicates treatment strategies and raises the risk of illness and death. The aim of this study was to isolate E. coli O157:H7, assess its susceptibility against antimicrobial agents, and determine the presence of ESBL and Carbapenemase production in stool samples collected from diarrheic patients in Shashemene, west Arsi, Ethiopia from July to November 2022. METHODS: The samples were cultured McConkey Agar and E. coli were isolated and identified by standard biochemical tests using API 20E. E. coli O157:H7 was further identified using sorbitol McConkey Agar and antisera for O157 antigen test. The antimicrobial susceptibility test was performed using the Kirby-Bauer disc diffusion method using different antibiotics. Each identified isolate was screened and tested for phenotypical ESBL and Carbapenemase production using combined disc method and modified carbapenem inactivation method, respectively. Bivariant and multivariant analyses were employed using a logistic regression model for further analysis and were interpreted based on the odds ratio and level of statistical significance at a p-value <0.05 with 95% confidence interval. RESULTS: E. coli O157:H7 strain was found from 9% (38/423) study participants. The majority of the participants [61.9% (262/423)] were males; and 19.1% (81/ 423) of the participants were under five children. Living in urban areas, having domestic animals, and ≥5 family size in the household were identified as statistically significant factors associated with E. coli O157:H7. Twenty-seven (71.1%) and 12 (31.6%) of the 38 E. coli O157:H7 isolates were phenotypically confirmed to be ESBL and carbapenemase producers, respectively. All isolates were resistant against Ampicillin, but sensitive to ciprofloxacin. High resistance to Ampicillin and Amoxicillin/Clavulanic acid was observed among the ESBL and carbapenemase producing isolates also. The extent of detection of multidrug resistant E. coli O157:H7 isolates against three or more classes of antimicrobial agents tested was alarmingly very high (84%). CONCLUSION: The E. coli O157:H7 isolates in this study showed a significant resistance to certain antimicrobials that were tested. The level of ESBL and Carbapenemase production among these isolates was found to be quite high. We observed a high resistance to Ampicillin and Amoxicillin/Clavulanic acid among the ESBL and carbapenemase producing isolates. Ciprofloxacin was found to be the most effective drug against both the ESBL producers and nonproducers.


Asunto(s)
Proteínas Bacterianas , Diarrea , Infecciones por Escherichia coli , Escherichia coli O157 , beta-Lactamasas , beta-Lactamasas/metabolismo , Etiopía/epidemiología , Humanos , Diarrea/microbiología , Escherichia coli O157/aislamiento & purificación , Escherichia coli O157/efectos de los fármacos , Escherichia coli O157/enzimología , Masculino , Femenino , Infecciones por Escherichia coli/microbiología , Infecciones por Escherichia coli/tratamiento farmacológico , Infecciones por Escherichia coli/epidemiología , Preescolar , Adulto , Proteínas Bacterianas/metabolismo , Niño , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Adolescente , Pruebas de Sensibilidad Microbiana , Lactante , Adulto Joven , Persona de Mediana Edad , Heces/microbiología
2.
BMC Vet Res ; 20(1): 345, 2024 Aug 06.
Artículo en Inglés | MEDLINE | ID: mdl-39103839

RESUMEN

BACKGROUND: Cupriavidus gilardii is an aerobic, gram-negative, motile, glucose-nonfermenting bacillus, first described in 1999. Typically, it exhibits low pathogenicity in humans, causing opportunistic infections primarily in individuals with compromised immune systems. This bacterium has been also found in various environmental sources such as plants and contaminated soils. Notably, there have been no documented cases of C. gilardii infections in animals. CASE PRESENTATION: This case report outlines a bovine neonatal diarrhea outbreak that occurred in Northern Greece, during which C. gilardii was isolated. Faecal samples from 5-day-old calves were collected and transported to the laboratory for further examination. Bacterial culture and next generation sequencing techniques were employed to confirm the presence of this bacterium in the samples. Following the isolation and identification of C. gilardii from the samples, an autogenous vaccine was produced and administered to the cows within the farm. Subsequent to vaccination, a progressive reduction in calf diarrhea and deaths was observed, leading to their eventual complete resolution. To the best of our knowledge, this represents the first documentation of C. gilardii isolation from cases of bovine neonatal diarrhea. CONCLUSION: This case report presents the first isolation case of C. gilardii from animal samples and more specifically from calf faecal samples. It represents an important observation, providing evidence that this opportunistic human pathogen could contribute to clinical symptoms in animals.


Asunto(s)
Animales Recién Nacidos , Enfermedades de los Bovinos , Cupriavidus , Diarrea , Brotes de Enfermedades , Heces , Infecciones por Bacterias Gramnegativas , Animales , Bovinos , Diarrea/veterinaria , Diarrea/microbiología , Diarrea/epidemiología , Brotes de Enfermedades/veterinaria , Enfermedades de los Bovinos/microbiología , Enfermedades de los Bovinos/epidemiología , Heces/microbiología , Infecciones por Bacterias Gramnegativas/veterinaria , Infecciones por Bacterias Gramnegativas/epidemiología , Infecciones por Bacterias Gramnegativas/microbiología , Cupriavidus/aislamiento & purificación , Cupriavidus/genética , Grecia/epidemiología
3.
Euro Surveill ; 29(31)2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39092530

RESUMEN

BackgroundShigella is a leading cause of moderate-to-severe diarrhoea worldwide and diarrhoeal deaths in children in low- and-middle-income countries.AimWe investigated trends and characteristics of shigellosis and antimicrobial resistance of Shigella sonnei in Israel.MethodsWe analysed data generated by the Sentinel Laboratory-Based Surveillance Network for Enteric Pathogens that systematically collects data on detection of Shigella at sentinel laboratories, along with the characterisation of the isolates at the Shigella National Reference Laboratory. Trends in the shigellosis incidence were assessed using Joinpoint regression and interrupted time-series analyses.ResultsThe average incidence of culture-confirmed shigellosis in Israel declined from 114 per 100,000 population (95% confidence interval (CI): 112-115) 1998-2004 to 80 per 100,000 population (95% CI: 79-82) 2005-2011. This rate remained stable 2012-2019, being 18-32 times higher than that reported from the United States or European high-income countries. After decreasing to its lowest values during the COVID-19 pandemic years (19/100,000 in 2020 and 5/100,000 in 2021), the incidence of culture-confirmed shigellosis increased to 39 per 100,000 population in 2022. Shigella sonnei is the most common serogroup, responsible for a cyclic occurrence of propagated epidemics, and the proportion of Shigella flexneri has decreased. Simultaneous resistance of S. sonnei to ceftriaxone, ampicillin and sulphamethoxazole-trimethoprim increased from 8.5% (34/402) in 2020 to 92.0% (801/876) in 2022.ConclusionsThese findings reinforce the need for continuous laboratory-based surveillance and inform the primary and secondary prevention strategies for shigellosis in Israel and other endemic high-income countries or communities.


Asunto(s)
Antibacterianos , Disentería Bacilar , Vigilancia de Guardia , Shigella sonnei , Humanos , Disentería Bacilar/epidemiología , Disentería Bacilar/microbiología , Disentería Bacilar/diagnóstico , Israel/epidemiología , Niño , Preescolar , Incidencia , Adolescente , Lactante , Masculino , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Femenino , Shigella sonnei/aislamiento & purificación , Shigella sonnei/efectos de los fármacos , Adulto , Persona de Mediana Edad , Adulto Joven , COVID-19/epidemiología , SARS-CoV-2 , Pruebas de Sensibilidad Microbiana , Anciano , Diarrea/epidemiología , Diarrea/microbiología , Recién Nacido , Farmacorresistencia Bacteriana
4.
Sci Rep ; 14(1): 18140, 2024 08 05.
Artículo en Inglés | MEDLINE | ID: mdl-39103611

RESUMEN

Rifaximin is FDA-approved for treatment of irritable bowel syndrome with diarrhea (IBS-D), but poor solubility may limit its efficacy against microbes in the mucus layer, e.g. Escherichia coli. Here we evaluate adding the mucolytic N-acetylcysteine (NAC) to improve rifaximin efficacy. In a resazurin checkerboard assay, combining rifaximin with NAC had significant synergistic effects in reducing E. coli levels. The optimal rifaximin + NAC combination was then tested in a validated rat model of IBS-D (induced by cytolethal distending toxin [CdtB] inoculation). Rats were inoculated with vehicle and treated with placebo (Control-PBS) or rifaximin + NAC (Control-Rif + NAC, safety), or inoculated with CdtB and treated with placebo (CdtB-PBS), rifaximin (CdtB-Rifaximin), or rifaximin + NAC (CdtB-Rif + NAC) for 10 days. CdtB-inoculated rats (CdtB-PBS) developed wide variability in stool consistency (P = 0.0014) vs. controls (Control-PBS). Stool variability normalized in rats treated with rifaximin + NAC (CdtB-Rif + NAC) but not rifaximin alone (CdtB-Rifaximin). Small bowel bacterial levels were elevated in CdtB-PBS rats but normalized in CdtB-Rif + NAC but not CdtB-Rifaximin rats. E. coli and Desulfovibrio spp levels (each associated with different IBS-D microtypes) were also elevated in CdtB-inoculated (CdtB-PBS) but normalized in CdtB-Rif + NAC rats. Cytokine levels normalized only in CdtB-Rif + NAC rats, in a manner predicted to be associated with reduced diarrhea driven by reduced E. coli. These findings suggest that combining rifaximin with NAC may improve the percentage of IBS-D patients responding to treatment.


Asunto(s)
Acetilcisteína , Diarrea , Modelos Animales de Enfermedad , Escherichia coli , Síndrome del Colon Irritable , Rifaximina , Animales , Rifaximina/farmacología , Rifaximina/uso terapéutico , Acetilcisteína/farmacología , Acetilcisteína/administración & dosificación , Ratas , Escherichia coli/efectos de los fármacos , Diarrea/tratamiento farmacológico , Diarrea/microbiología , Síndrome del Colon Irritable/tratamiento farmacológico , Síndrome del Colon Irritable/microbiología , Masculino , Ratas Sprague-Dawley , Quimioterapia Combinada
5.
Nat Commun ; 15(1): 6823, 2024 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-39122704

RESUMEN

Current treatments for chronic diarrhea have limited efficacy and several side effects. Probiotics have the potential to alleviate symptoms of diarrhea. This randomized, double-blind, placebo-controlled trial evaluates the effects of administering the probiotic Lactiplantibacillus plantarum P9 (P9) strain in young adults with chronic diarrhea (Clinical Trial Registration Number: ChiCTR2000038410). The intervention period lasts for 28 days, followed by a 14-day post-intervention period. Participants are randomized into the P9 (n = 93) and placebo (n = 96) groups, with 170 individuals completing the double-blind intervention phase (n = 85 per group). The primary endpoint is the diarrhea symptom severity score. Both intention-to-treat (n = 189) and per-protocol (n = 170) analyses reveal a modest yet statistically significant reduction in diarrhea severity compared to the placebo group (20.0%, P = 0.050; 21.4%, P = 0.048, respectively). In conclusion, the results of this study support the use of probiotics in managing chronic diarrhea in young adults. However, the lack of blood parameter assessment and the short intervention period represent limitations of this study.


Asunto(s)
Diarrea , Probióticos , Humanos , Diarrea/microbiología , Diarrea/terapia , Probióticos/uso terapéutico , Probióticos/administración & dosificación , Método Doble Ciego , Masculino , Adulto Joven , Adulto , Femenino , Enfermedad Crónica , Resultado del Tratamiento , Lactobacillus plantarum , Adolescente
6.
BMC Vet Res ; 20(1): 355, 2024 Aug 09.
Artículo en Inglés | MEDLINE | ID: mdl-39123170

RESUMEN

Diarrhea is a common issue in domestic yaks (Bos grunniens) that can occur with pasture alterations and significantly impacts growth performance. Previous research has examined the microbiota of diarrhetic yaks; however, the structural changes in gut bacterial community and microbial interactions in yaks with grassland alteration-induced diarrhea remain poorly understood. To explore variations in gut microbiota homeostasis among yaks suffering from diarrhea, fecal microbiota diversity and composition were analyzed using 16 S rRNA amplicon sequencing. Gut fecal microbiota diversity was lower in diarrhetic yaks than in non-diarrhetic yaks. Furthermore, the bacterial community composition (including that of Proteobacteria and Actinobacteria) in the feces of diarrhetic yaks displayed significant alterations. Co-occurrence network analysis further underscored the compromised intestinal flora stability in yaks with diarrhea relative to that in non-diarrhetic yaks. Interestingly, the abundance of beneficial bacteria, such as Lachnospiraceae_AC2044_group and Lachnospiraceae_NK4A136_group, were decreased in yaks with diarrhea, and the reductions were negatively correlated with the fecal water content. Collectively, these findings indicate that diminished microbial stability and increased abundance of certain bacteria in the gut may contribute to diarrhea occurrence in yaks.


Asunto(s)
Enfermedades de los Bovinos , Diarrea , Heces , Microbioma Gastrointestinal , ARN Ribosómico 16S , Animales , Bovinos , Diarrea/veterinaria , Diarrea/microbiología , Heces/microbiología , Enfermedades de los Bovinos/microbiología , ARN Ribosómico 16S/genética , Bacterias/clasificación , Bacterias/aislamiento & purificación , Bacterias/genética
7.
Pan Afr Med J ; 48: 5, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38946740

RESUMEN

Introduction: as cholera, due to toxigenic bacteria Vibrio cholera (serogroups O1 and O139), is a major public health threat in Africa, the aim of this work was to investigate potentially pathogenic Vibrionaceae bacteria firstly from human stool samples, and secondly from various environmental water points of Saint-Louis city in Senegal. Methods: a hospital-based study was conducted between 2013 and 2015. Stool samples were taken and cultured from daily incoming patients or hospitalized for acute diarrhea at Saint-Louis´ regional hospital. For environment, a monthly longitudinal sampling from January to October 2016 was carried out at 10 sites in the city. We used total DNA extracted from APW (alkaline peptone water) broth solutions and on suspect bacterial colonies to run PCR Multiplex targeting specific DNA fragments to detect Vibrio genus and specific species. In case of positivity, a simplex PCR was performed to test for cholera toxins Ctx, and V. parahaemolyticus TRH and TDH. Results: for 43 patients screened, bacterial culture was positive in 6% of cases but no strain of V. cholerae or other Vibrio sp. was isolated. PCR on 90 APW solutions were positive for Vibrio sp.(n = 43), V. cholera(n = 27), V. mimicus(n = 16), V. parahaemolyticus(8), V. alginolyticus(n = 4), and V. vulnificus(n = 2). Unlike for those on suspected colonies which were positive for a majority of V. parahaemolyticus (n = 40) and V. cholerae non-O1 / O139 (n = 35). Six strains of V. parahaemolyticus carried TRH gene, 3 of which expressed simultaneously virulence TRH and TDH genes. For physicochemical parameters, all temperatures varied similarly according to a unimodal seasonality, as well as salinity. Conclusion: despite the presence of natural populations of Vibrionaceae, even toxigenic ones, was noted in water environment, along with favorable habitat conditions that could play a role in transmission of Vibriosis in the Saint Louis population, we did not isolate any of them from patients screened at the hospital.


Asunto(s)
Cólera , Heces , Reacción en Cadena de la Polimerasa , Humanos , Senegal , Cólera/microbiología , Cólera/epidemiología , Heces/microbiología , Diarrea/microbiología , Diarrea/epidemiología , Microbiología del Agua , Vibrionaceae/aislamiento & purificación , Vibrionaceae/genética , Vibrio/aislamiento & purificación , Vibrio/genética , ADN Bacteriano/análisis , Vibrio cholerae/aislamiento & purificación , Vibrio cholerae/genética , Adulto , Femenino , Masculino
8.
Clin Infect Dis ; 79(Supplement_1): S8-S19, 2024 Jul 12.
Artículo en Inglés | MEDLINE | ID: mdl-38996039

RESUMEN

BACKGROUND: The Ethiopian government has developed the multisectoral cholera elimination plan (NCP) with an aim of reducing cholera incidence and case fatality rate (CFR). To better understand and monitor the progress of this plan, a comprehensive review of national cholera epidemiology is needed. METHODS: Reported data on cholera/acute watery diarrhea (AWD) cases in the past 20 years were extracted from the Ethiopian Public Health Institute and World Health Organization databases. Descriptive statistics, Pearson χ2, and logistic regression analyses were conducted. RESULTS: From January 2001 to November 2023, a total of 215 205 cholera/AWD cases, 2355 deaths with a cumulative CFR of 1.10% (95% confidence interval [CI], 1.092-1.095), and a mean annual incidence rate of 8.9/100 000 (95% CI, 6.5-11.3) were reported. Two major upsurges of cholera epidemics were found in the last two decades with mean attack rate (AR) of 20.57/100 000 in 2006-2010 and 14.83/100 000 in 2016-2020. Another resurgence of outbreaks occured in 2021-2023 (mean AR, 8.63/100 000). In 2015-2023, 54.0% (53 990/99 945) of cases were aged 15-44 years. National cholera CFR (3.13% [95% CI: 2.1-4.5]) was the highest in 2022. The 2015-2023 cumulative cholera CFR was different across regions: Benishangul Gumuz (6.07%), Gambela (1.89%), Sidama (1.42%), Southern Nation, Nationalities, and Peoples' (1.34%), Oromia (1.10%), and Amhara (1.09%). Cholera/AWD patients in older adults (≥45 years), severe dehydration, peak rainy season (June-August), and outpatients were associated with higher risk of death. CONCLUSIONS: Cholera has been a public health problem in Ethiopia with case fatalities still above the global target. Case management needs to be improved particularly in outpatients and older populations. Outbreak preparedness should be rolled out well in advance of the typical rainy seasons. Significant investments are essential to advance the cholera surveillance system at healthcare setting and community level. Underlying factors of cholera deaths per areas should be further investigated to guide appropriate interventions to meet the NCP target by 2028.


Asunto(s)
Cólera , Diarrea , Brotes de Enfermedades , Estaciones del Año , Humanos , Cólera/epidemiología , Cólera/mortalidad , Etiopía/epidemiología , Incidencia , Diarrea/epidemiología , Diarrea/mortalidad , Diarrea/microbiología , Adolescente , Adulto , Estudios Retrospectivos , Adulto Joven , Preescolar , Masculino , Femenino , Niño , Persona de Mediana Edad , Lactante , Anciano
9.
JAMA Netw Open ; 7(7): e2418129, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38967929

RESUMEN

Importance: Probiotics are often considered in children to prevent antibiotic-associated diarrhea. However, the underlying mechanistic effects and impact of probiotics on antibiotic-induced microbiota changes are not well understood. Objective: To investigate the effects of a multispecies probiotic on the gut microbiota composition in children receiving antibiotics. Design, Setting, and Participants: This is a secondary analysis of a randomized, quadruple-blind, placebo-controlled clinical trial from February 1, 2018, to May 31, 2021, including 350 children receiving broad-spectrum antibiotics in the inpatient and outpatient settings. Patients were followed up until 1 month after the intervention period. Fecal samples and data were analyzed between September 1, 2022, and February 28, 2023. Eligibility criteria included 3 months to 18 years of age and recruitment within 24 hours following initiation of broad-spectrum systemic antibiotics. In total, 646 eligible patients were approached and 350 participated in the trial. Intervention: Participants were randomly assigned to receive daily placebo or a multispecies probiotic formulation consisting of 8 strains from 5 different genera during antibiotic treatment and for 7 days afterward. Main Outcomes and Measures: Fecal stool samples were collected at 4 predefined times: (1) inclusion, (2) last day of antibiotic use, (3) last day of the study intervention, and (4) 1 month after intervention. Microbiota analysis was performed by 16S ribosomal RNA gene sequencing. Results: A total of 350 children were randomized and collected stool samples from 88 were eligible for the microbiota analysis (54 boys and 34 girls; mean [SD] age, 47.09 [55.64] months). Alpha diversity did not significantly differ between groups at the first 3 times. Shannon diversity (mean [SD], 3.56 [0.75] vs 3.09 [1.00]; P = .02) and inverse Simpson diversity (mean [SD], 3.75 [95% CI, 1.66-5.82] vs -1.31 [95% CI, -3.17 to 0.53]; P = 1 × 10-4) indices were higher in the placebo group compared with the probiotic group 1 month after intervention. Beta diversity was not significantly different at any of the times. Three of 5 supplemented genera had higher relative abundance during probiotic supplementation, but this difference had disappeared after 1 month. Conclusions and Relevance: The studied probiotic mixture had minor and transient effects on the microbiota composition during and after antibiotic treatment. Further research is needed to understand their working mechanisms in manipulating the microbiome and preventing antibiotic-associated dysbiosis and adverse effects such as antibiotic-associated diarrhea. Trial Registration: ClinicalTrials.gov Identifier: NCT03334604.


Asunto(s)
Antibacterianos , Diarrea , Heces , Microbioma Gastrointestinal , Probióticos , Humanos , Probióticos/uso terapéutico , Femenino , Masculino , Antibacterianos/uso terapéutico , Antibacterianos/efectos adversos , Microbioma Gastrointestinal/efectos de los fármacos , Niño , Preescolar , Heces/microbiología , Diarrea/inducido químicamente , Diarrea/prevención & control , Diarrea/tratamiento farmacológico , Diarrea/microbiología , Adolescente , Lactante
10.
Ann Afr Med ; 23(2): 132-139, 2024 Apr 01.
Artículo en Francés, Inglés | MEDLINE | ID: mdl-39028160

RESUMEN

BACKGROUND: Diarrheagenic Escherichiacoli (DEC) infections constitute the leading causes of morbidity and mortality among children in Sub-Saharan Africa. However, little has so far been done to properly reveal the pathogenic endowments of DEC in these populations. AIMS AND OBJECTIVES: We evaluated 4 DEC strains among children under 5 years. MATERIALS AND METHODS: A cross-sectional study design was employed among 384 positive cases. RESULTS: There was a significant decline in infections associated with DEC as the children grew older (χ2[12] = 87.366: P = [0.000]. A total of 56 (14.6%) cases were 0-12 months, 168 (43.8%) were 13-24 months, 88 (22.9%) were 25-36 months, 40 (10.4%) were 37-48 months, and 32 (8.3%) were 49-60 months. A total of 248 (64.6%) male subjects exhibited more susceptibility to DEC infections than their female counterparts (n = 136 [35.4%]) (χ2[3] =13.313: P = [0.004]. Subjects from urban areas (n = 248 [64.6%]), significantly bored the brunt of infections than those from rural areas (n = 136 [35.4%]) (χ2[3] = 35.147: P = [0.000]. The prevalence of DEC appeared significantly higher during rainy seasons (n = 269 [70.1%]). CONCLUSION: Young age, male gender, crowding, and rainy season play a central role in the transmission of DEC pathotypes.


Résumé Contexte:Les infections à Escherichia coli entéropathogène (DEC) constituent les principales causes de morbidité et de mortalité chez les enfants en Afrique subsaharienne. Cependant, jusqu'à présent, peu de choses ont été faites pour révéler correctement les caractéristiques pathogènes de DEC dans ces populations.Objectifs:Nous avons évalué 4 souches de DEC chez les enfants de moins de 5 ans.Matériel et méthodes:Un plan d'étude transversal a été utilisé parmi 384 cas positifs.Résultats:Il y a eu une diminution significative des infections associées à DEC à mesure que les enfants grandissaient (χ2 [12] = 87,366 : P = [0,000]). Un total de 56 (14,6 %) cas avaient entre 0 et 12 mois, 168 (43,8 %) avaient entre 13 et 24 mois, 88 (22,9 %) avaient entre 25 et 36 mois, 40 (10,4 %) avaient entre 37 et 48 mois, et 32 (8,3 %) avaient entre 49 et 60 mois. Un total de 248 (64,6 %) sujets masculins ont montré une plus grande susceptibilité aux infections à DEC que leurs homologues féminins (n = 136 [35,4 %]) (χ2 [3] = 13,313 : P = [0,004]). Les sujets des zones urbaines (n = 248 [64,6 %]) ont significativement supporté le fardeau des infections par rapport à ceux des zones rurales (n = 136 [35,4 %]) (χ2 [3] = 35,147 : P = [0,000]). La prévalence de DEC semblait significativement plus élevée pendant la saison des pluies (n = 269 [70,1 %]).Conclusion:L'âge jeune, le sexe masculin, la surpopulation et la saison des pluies jouent un rôle central dans la transmission des pathotypes de DEC.


Asunto(s)
Diarrea , Infecciones por Escherichia coli , Humanos , Masculino , Femenino , Estudios Transversales , Lactante , Preescolar , Diarrea/epidemiología , Diarrea/microbiología , Infecciones por Escherichia coli/epidemiología , Infecciones por Escherichia coli/transmisión , Prevalencia , Recién Nacido , Escherichia coli/aislamiento & purificación , Población Urbana , Factores Socioeconómicos , Población Rural , Distribución por Edad , Factores de Riesgo , Distribución por Sexo , Estaciones del Año , Heces/microbiología
11.
BMC Infect Dis ; 24(1): 744, 2024 Jul 29.
Artículo en Inglés | MEDLINE | ID: mdl-39069609

RESUMEN

BACKGROUND: Clostridioides difficile infection is associated with antibiotic use and manifests as diarrhea; however, emerging cases of fulminant diarrhea caused by binary toxin-producing C. difficile unrelated to prior antibiotic exposure have been reported. Although fulminant colitis caused by C. difficile has been documented, instances of intussusception remain scarce. Here, we present a case of adult intussusception with severe hypokalemia and pneumonia resulting from a community-acquired C. difficile infection in Japan. CASE PRESENTATION: An 82-year-old male presented with dizziness, progressive weakness, and diarrhea. Initial vital signs indicated severe respiratory and circulatory distress, and laboratory findings revealed hypokalemia, pneumonia, and septic shock. Imaging confirmed intussusception of the ascending colon. Although colonoscopy suggested a potential tumor, no malignancy was found. The C. difficile rapid test result was positive, indicating community-acquired C. difficile infection. Treatment with vancomycin was initiated; however, intussusception relapsed. Surgical intervention was successful and led to clinical improvement. The patient's complex pathophysiology involved community-acquired C. difficile-induced severe diarrhea, hypokalemia, hypermetabolic alkalosis, and subsequent intussusception. Although adult intussusception is uncommon, this case was uniquely linked to binary toxin-producing C. difficile. The identified strain, SUH1, belonged to a novel sequence type (ST1105) and clade 3, suggesting a highly virulent clone. Resistome analysis aligned with phenotypic susceptibility to metronidazole and vancomycin, confirming their treatment efficacy. CONCLUSION: This case report highlights a binary toxin-producing C. difficile that caused intussusception. The consideration of community-acquired C. difficile in the differential diagnosis of severe enteritis is necessary, even in Japan.


Asunto(s)
Clostridioides difficile , Infecciones por Clostridium , Infecciones Comunitarias Adquiridas , Hipopotasemia , Intususcepción , Humanos , Masculino , Anciano de 80 o más Años , Clostridioides difficile/aislamiento & purificación , Infecciones Comunitarias Adquiridas/microbiología , Infecciones Comunitarias Adquiridas/complicaciones , Infecciones por Clostridium/complicaciones , Infecciones por Clostridium/microbiología , Hipopotasemia/etiología , Intususcepción/microbiología , Intususcepción/etiología , Neumonía/microbiología , Neumonía/complicaciones , Japón , Antibacterianos/uso terapéutico , Diarrea/microbiología , Diarrea/etiología
12.
J Med Virol ; 96(8): e29812, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39056206

RESUMEN

Currently, the emergence of the endemic Coronavirus disease (COVID-19) situation still poses a serious threat to public health. However, it remains elusive about the role of fecal microbiota transplantation in treating COVID-19. We performed a randomized, double-blind, placebo-controlled clinical trial enrolling a cohort of 40 COVID-19 patients with mild-moderate symptoms. Our results showed that fecal microbiota transplantation provided an amelioration in diarrhoea (p = 0.026) of digestive system and depression (p = 0.006) of neuropsychiatric-related symptom in COVID-19 patients, respectively. Meanwhile, we found that the number of patients with diarrhoea decreased from 19 to 0 on day 7 after fecal microbiota transplantation treatment, and it was statistically changed compared to the placebo group (p = 0.047). Of note, the serum concentration of aspartate aminotransferase-to-alanine aminotransferase ratio (AST/ALT, fecal microbiota transplantation, pre vs. post: 0.966 vs. 0.817), a biomarker for predicting long COVID-19, was significantly reduced by fecal microbiota transplantation. In all, our study supports that fecal microbiota transplantation could be a novel therapeutic strategy for COVID-19 patients with diarrhoea and depressive symptoms, which is potentially valuable in ameliorating long COVID-19 symptoms.


Asunto(s)
COVID-19 , Depresión , Diarrea , Trasplante de Microbiota Fecal , Humanos , Trasplante de Microbiota Fecal/métodos , COVID-19/terapia , COVID-19/complicaciones , Diarrea/terapia , Diarrea/microbiología , Diarrea/virología , Masculino , Femenino , Método Doble Ciego , Persona de Mediana Edad , Depresión/terapia , Estudios Prospectivos , Adulto , Anciano , Heces/microbiología , Heces/virología , SARS-CoV-2 , Resultado del Tratamiento , Aspartato Aminotransferasas/sangre , Microbioma Gastrointestinal
13.
Euro Surveill ; 29(30)2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39056198

RESUMEN

BackgroundHaemolytic uremic syndrome (HUS) is a severe complication of infection with Shiga toxin-producing Escherichia coli (STEC). Although the reservoirs of STEC are known, the source of the infection of sporadic cases is often unknown. In 2023, we observed several cases of bloody diarrhoea with STEC infection in children and adolescents returning from vacations.AimWe aimed to explore the association between travel and bloody diarrhoea with STEC infection in children and adolescents.MethodsWe included all children and adolescents with bloody diarrhoea with STEC infection identified in 2023 by the ItalKid-HUS Network surveillance system in northern Italy. We interviewed children's families and sent a questionnaire on recent travels abroad. The exposure time was between 3 days after arrival abroad and 5 days after return home. A self-controlled case series (SCCS) design was used in the analysis.ResultsOf the 43 cases, 11 developed HUS. Twenty-three cases did not travel abroad, while 20 had travelled to several destinations. The incidence rate ratio (IRR) associated with travel to Egypt was 88.6 (95% confidence interval (CI): 17.0-462). Serotype analysis excluded the possibility of a single strain causing the infections. We did not find the source of the infections.ConclusionThere is an elevated risk of acquiring STEC infection with bloody diarrhoea and HUS associated with travel to Egypt. Specific investigations to identify the source are needed to implement effective preventive measures.


Asunto(s)
Diarrea , Infecciones por Escherichia coli , Síndrome Hemolítico-Urémico , Escherichia coli Shiga-Toxigénica , Viaje , Humanos , Egipto/epidemiología , Escherichia coli Shiga-Toxigénica/aislamiento & purificación , Infecciones por Escherichia coli/epidemiología , Infecciones por Escherichia coli/microbiología , Infecciones por Escherichia coli/diagnóstico , Adolescente , Niño , Femenino , Masculino , Síndrome Hemolítico-Urémico/epidemiología , Síndrome Hemolítico-Urémico/microbiología , Italia/epidemiología , Diarrea/microbiología , Diarrea/epidemiología , Preescolar , Lactante , Incidencia , Vigilancia de la Población
14.
Vet Microbiol ; 296: 110171, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38981202

RESUMEN

Intestinal pathogenic Escherichia coli (InPEC) is one of the most common causes of bacterial diarrhea in farm animals, including profuse neonatal diarrhea and post weaning diarrhea (PWD) in piglets. In this study, we investigated the prevalence of InPEC and associated primary virulence factors among 543 non-duplicate E. coli isolates from diarrheal pigs from 15 swine farms in southern China. Six major virulence genes associated with InPEC were identified among 69 (12.71 %) E. coli isolates and included est (6.62 %), K88 (4.79 %), elt (3.68 %), eae (1.47 %), stx2 (0.92 %) and F18 (0.55 %). Three pathotypes of InPEC were identified including ETEC (8.10 %), EPEC (1.29 %) and STEC/ETEC (0.92 %). In particular, K88 was only found in ETEC from breeding farms, whereas F18 was only present in STEC/ETEC hybrid from finishing farms. Whole genome sequence analysis of 37 E. coli isolates revealed that InPEC strains frequently co-carried multiple antibiotic resistance gene (ARG). est, elt and F18 were also found to co-locate with ARGs on a single IncFIB/IncFII plasmid. InPEC isolates from different pathotypes also possessed different profiles of virulence genes and antimicrobial resistance genes. Population structure analysis demonstrated that InPEC isolates from different pathotypes were highly heterogeneous whereas those of the same pathotype were extremely similar. Plasmid analysis revealed that K88 and/or est/elt were found on pGX18-2-like/pGX203-2-like and pGX203-1-like IncFII plasmids, while F18 and elt/est, as well as diverse ARGs were found to co-locate on IncFII/IncFIB plasmids with a non-typical backbone. Moreover, these key virulence genes were flanked by or adjacent to IS elements. Our findings indicated that both clonal expansion and horizontal spread of epidemic IncFII plasmids contributed to the prevalence of InPEC and the specific virulence genes (F4, F18, elt and est) in the tested swine farms.


Asunto(s)
Diarrea , Infecciones por Escherichia coli , Escherichia coli , Enfermedades de los Porcinos , Factores de Virulencia , Animales , Porcinos , Enfermedades de los Porcinos/microbiología , Enfermedades de los Porcinos/epidemiología , China/epidemiología , Infecciones por Escherichia coli/veterinaria , Infecciones por Escherichia coli/microbiología , Infecciones por Escherichia coli/epidemiología , Diarrea/microbiología , Diarrea/veterinaria , Diarrea/epidemiología , Prevalencia , Factores de Virulencia/genética , Escherichia coli/genética , Escherichia coli/patogenicidad , Escherichia coli/aislamiento & purificación , Escherichia coli/clasificación , Virulencia/genética , Intestinos/microbiología , Secuenciación Completa del Genoma , Escherichia coli Enterotoxigénica/genética , Escherichia coli Enterotoxigénica/patogenicidad , Escherichia coli Enterotoxigénica/aislamiento & purificación , Proteínas de Escherichia coli/genética
15.
Viruses ; 16(7)2024 Jun 29.
Artículo en Inglés | MEDLINE | ID: mdl-39066219

RESUMEN

The gut microbiota is involved in the pathogenesis of diarrhea-predominant irritable bowel syndrome (IBS-D), but few studies have focused on the role of the gut virome in IBS-D. We aimed to explore the characteristics of the gut virome in patients with IBS-D, its interactions with bacteria and metabolites, and the associations between gut multiomics profiles and symptoms. This study enrolled twelve patients with IBS-D and eight healthy controls (HCs). The stool samples were subjected to metavirome sequencing, 16S rRNA gene sequencing, and untargeted metabolomic analysis. The participants completed relevant scales to assess the severity of their gastrointestinal symptoms, depression, and anxiety. The results revealed unique DNA and RNA virome profiles in patients with IBS-D with significant alterations in the abundance of contigs from Siphoviridae, Podoviridae, Microviridae, Picobirnaviridae, and Tombusviridae. Single-omics co-occurrence network analyses demonstrated distinct differences in the gut virus, bacteria, and metabolite network patterns between patients with IBS-D and HCs. Multiomics networks revealed that short-chain fatty acid-producing bacteria occupied more core positions in IBS-D networks, but had fewer links to viruses. Amino acids and their derivatives exhibit unique connectivity patterns and centrality features within the IBS-D network. The gastrointestinal and psychological symptom factors of patients with IBS-D were highly clustered in the symptom-multiomics network compared with those of HCs. Machine learning models based on multiomics data can distinguish IBS-D patients from HCs and predict the scores of gastrointestinal and psychological symptoms. This study provides insights into the interactions among gut viruses, bacteria, metabolites, and clinical symptoms in patients with IBS-D, indicating further classification and personalized treatment for IBS-D.


Asunto(s)
Bacterias , Heces , Microbioma Gastrointestinal , Síndrome del Colon Irritable , Viroma , Humanos , Síndrome del Colon Irritable/virología , Síndrome del Colon Irritable/microbiología , Síndrome del Colon Irritable/metabolismo , Masculino , Adulto , Bacterias/clasificación , Bacterias/genética , Bacterias/metabolismo , Bacterias/aislamiento & purificación , Femenino , Heces/virología , Heces/microbiología , ARN Ribosómico 16S/genética , Persona de Mediana Edad , Metabolómica , Virus/clasificación , Virus/genética , Virus/metabolismo , Virus/aislamiento & purificación , Diarrea/virología , Diarrea/microbiología , Adulto Joven , Multiómica
16.
Adv Exp Med Biol ; 1449: 175-186, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39060738

RESUMEN

Clostridioides difficile is the most common causative agent of antibiotic-associated diarrhea. This spore forming, obligate anaerobic, gram-positive bacillus is becoming responsible for an increasing number of infections worldwide, both in community and in hospital settings, whose severity can vary widely from an asymptomatic infection to a lethal disease. While discontinuation of antimicrobial agents and antibiotic treatment of the infection remain the cornerstone of therapy, more recent fecal microbiota transplantation has also been valid as a therapy. The use of probiotics, especially Saccharomyces boulardii CNCM I-745 have become valid forms of prevention therapy. Although there are studies in adults with microbiota-targeted new generation therapies and Clostridium difficile vaccines, there are no data in the paediatric age group yet.


Asunto(s)
Antibacterianos , Clostridioides difficile , Infecciones por Clostridium , Trasplante de Microbiota Fecal , Probióticos , Humanos , Infecciones por Clostridium/prevención & control , Infecciones por Clostridium/microbiología , Infecciones por Clostridium/terapia , Clostridioides difficile/patogenicidad , Clostridioides difficile/fisiología , Probióticos/uso terapéutico , Antibacterianos/uso terapéutico , Microbioma Gastrointestinal , Diarrea/prevención & control , Diarrea/microbiología , Diarrea/terapia
17.
Adv Exp Med Biol ; 1449: 143-156, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39060736

RESUMEN

Acute infectious diarrhea (AID) is one of the most common diseases in pediatric age with relevant burden both in high and in low-income countries. Thanks to their direct action on enterocyte functions and indirect actions on the mucosal and systemic immune system and on intestinal microbiome, probiotics are an ideal intervention to treat AID in childhood. However, their efficacy is strictly related to strains and indications, and practitioners should take this information into account in clinical practice. This chapter summarizes the main mechanisms of action of probiotics in AID, with a focus on proof of efficacy supporting their use in prevention and treatment of childhood AID. The use of selected strains in appropriate doses is strongly recommended by guidelines of AID, based on compelling proofs of efficacy and safety. At present, therapy with probiotics of AID is probably the strongest indication for probiotic use in medicine. Their role in prevention of AID is however questionable in healthy population, whereas it should be considered in at-risk population. Evidence for prevention of diarrhea in day-care centers and communities is lacking, but consistent evidence supports efficacy in prevention of hospital acquired diarrhea. Finally, this chapter presents novelties on this topic, in particular the role of rotavirus immunization on probiotics effectiveness and the effect of probiotics and postbiotics on Covid-associated diarrhea.Overall: AID is the most convincing area for probiotic use in children with gastrointestinal disorders, and effective strains should be used early on after onset of symptoms.


Asunto(s)
COVID-19 , Diarrea , Probióticos , Humanos , Probióticos/uso terapéutico , Diarrea/microbiología , Diarrea/terapia , Diarrea/prevención & control , COVID-19/inmunología , COVID-19/prevención & control , COVID-19/virología , COVID-19/terapia , Enfermedad Aguda , Microbioma Gastrointestinal , SARS-CoV-2/inmunología , Niño
18.
J Infect Dis ; 230(1): 239-249, 2024 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-39052715

RESUMEN

BACKGROUND: Macrolide antibiotics, including azithromycin, can reduce under 5 years of age mortality rates and treat various infections in children in sub-Saharan Africa. These exposures, however, can select for antibiotic-resistant bacteria in the gut microbiota. METHODS: Our previous randomized controlled trial (RCT) of a rapid-test-and-treat strategy for severe acute diarrheal disease in children in Botswana included an intervention (3-day azithromycin dose) group and a control group that received supportive treatment. In this prospective matched cohort study using stools collected at baseline and 60 days after treatment from RCT participants, the collection of antibiotic resistance genes or resistome was compared between groups. RESULTS: Certain macrolide resistance genes increased in prevalence by 13%-55% at 60 days, without differences in gene presence between the intervention and control groups. These genes were linked to tetracycline resistance genes and mobile genetic elements. CONCLUSIONS: Azithromycin treatment for bacterial diarrhea for young children in Botswana resulted in similar effects on the gut resistome as the supportive treatment and did not provide additional selective pressure for macrolide resistance gene maintenance. The gut microbiota of these children contains diverse macrolide resistance genes that may be transferred within the gut upon repeated exposures to azithromycin or coselected by other antibiotics. CLINICAL TRIALS REGISTRATION: NCT02803827.


Asunto(s)
Antibacterianos , Azitromicina , Diarrea , Microbioma Gastrointestinal , Humanos , Azitromicina/uso terapéutico , Azitromicina/administración & dosificación , Botswana , Diarrea/microbiología , Diarrea/tratamiento farmacológico , Antibacterianos/uso terapéutico , Antibacterianos/farmacología , Preescolar , Lactante , Estudios Prospectivos , Femenino , Masculino , Microbioma Gastrointestinal/efectos de los fármacos , Microbioma Gastrointestinal/genética , Farmacorresistencia Bacteriana/genética , Heces/microbiología , Bacterias/efectos de los fármacos , Bacterias/genética , Bacterias/clasificación , Bacterias/aislamiento & purificación
19.
Nutrients ; 16(13)2024 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-38999739

RESUMEN

Diarrhea of college students (DCS) is a prevalent issue among college students, affecting their daily lives and academic performance. This study aims to explore the potential effect of Bifidobacterium breve BB05 supplements on the DCS. Initially, fifty healthy and fifty diarrheal students were recruited in the observational experiment and allocated into control and diarrhea groups, respectively. Subsequently, one hundred diarrheal students were newly recruited in the intervention experiment and randomly allocated into placebo and probiotic groups, both treated for 2 weeks. Questionnaires (BSS, HAMA-14, and HDRS-17) were performed to assess the students' diarrheal states and mental health at baseline and post-treatment. Fecal samples underwent 16S rRNA sequencing and Enzyme-Linked Immunosorbent Assay to evaluate gut microbiota and fecal metabolite alternations. Results indicated that B. breve BB05 supplementation significantly enriched (p < 0.05) the reduced gut microbial diversity caused by diarrhea. Diarrhea resulted in notable alterations in gut microbiota composition, as exhibited by elevated Collinsella and Streptococcus, alongside substantially decreased Bifidobacterium, Bacteroides, and Prevotella, while B. breve BB05 supplementation partially restored the compromised gut microbiota at both the phylum and genus levels, particularly by increasing Bifidobacterium and Roseburia (p < 0.05). Importantly, questionnaire results suggested that B. breve BB05 administration achieved superior efficacy in relieving diarrhea symptoms and the associated anxiety and depression in college students. An increased fecal concentration of 5-hydroxytryptamine (5-HT) was also observed in the probiotic group, while Acetylcholine (ACH), Epinephrine (EPI), and Noradrenaline/Norepinephrine (NANE) reduced, revealing the potential of B. breve BB05 in alleviating anxiety and depression via modulating the microbiota-gut-brain axis. Furthermore, correlation analysis suggested that the altered microbiota and fecal neurotransmitters were closely associated with the mental symptoms. These results endorse B. breve BB05 intervention as a promising and innovative approach to alleviate both diarrhea and mental health conditions among college students.


Asunto(s)
Bifidobacterium breve , Diarrea , Heces , Microbioma Gastrointestinal , Probióticos , Estudiantes , Humanos , Diarrea/microbiología , Diarrea/terapia , Probióticos/uso terapéutico , Probióticos/administración & dosificación , Método Doble Ciego , Masculino , Estudiantes/psicología , Femenino , Adulto Joven , Heces/microbiología , Universidades , Adulto
20.
PLoS One ; 19(7): e0304409, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38959220

RESUMEN

BACKGROUND: Children with under-five year age disproportionally affected with foodborne illness. Campylobacteriosis is the most common foodborne disease next to Norovirus infection. Macrolides are commonly prescribed as the first line of treatment for Campylobacter gastroenteritis, with fluoroquinolone and tetracycline as secondary options. However, resistance to these alternatives has been reported in various regions worldwide. OBJECTIVE: To determine the prevalence, associated risk-factors and antimicrobial resistance of Campylobacter jejuni and C. coli among under-five children with diarrhea. METHODS: Institution-based cross-sectional study was conducted from November, 2022 to April 2023. The study sites were selected using a random sampling technique, while the study subjects were included using a convenient sampling technique. The data were collected using a structured questionnaire. Stool samples were inoculated onto modified charcoal cefoperazone deoxycholate agar and incubated for 48 hours. The suspected colonies were analyzed using matrix-assisted laser desorption ionization-time of flight mass spectrometry to confirm the species. Antimicrobial susceptibility testing was performed using a disc diffusion technique. All potential covariates (independent variables) were analyzed one by one using bivariate logistic regression model to identify candidate variables with P value < 0.25. Multivariable logistic analysis was used to identify potential associated factors using the candidate variables. A p value ≤ 0.05 at a 95% confidence interval was statistically significant. RESULT: Among the 428 samples, 7.0% (CI: 4.5-9.3) were confirmed Campylobacter species. The prevalence of C. jejuni and C. coli among under-five children was 5.1% (CI: 3.0-7.0) and 1.9% (CI: 0.7-3.3), respectively. C. jejuni (73.3%) was dominant over C. coli (26.7%). The resident, contact with domestic animals, and parents/guardians education level were significantly associated with campylobacteriosis among under-five children. One-third of the Campylobacter isolates (33.3%, 10/30) were resistant to ciprofloxacin and tetracycline whereas 10.0% (3/30) were resistant to erythromycin. Furthermore, 3.3% (1/30) of the Campylobacter were found to be multidrug-resistant. CONCLUSION: The prevalence of Campylobacter species was 7.0%. The resistance rate of Campylobacter species of ciprofloxacin and tetracycline-resistance strains was 33.3%. Peri-urban residence, contact with domestic animals, and low parental educational statuses were significantly associated factors with increased risk of Campylobacter infection. Continuous surveillance on antimicrobial resistance and health education of personal and environmental hygiene should be implemented in the community.


Asunto(s)
Antibacterianos , Infecciones por Campylobacter , Campylobacter coli , Campylobacter jejuni , Diarrea , Humanos , Campylobacter jejuni/efectos de los fármacos , Campylobacter jejuni/aislamiento & purificación , Campylobacter coli/efectos de los fármacos , Campylobacter coli/aislamiento & purificación , Infecciones por Campylobacter/epidemiología , Infecciones por Campylobacter/tratamiento farmacológico , Infecciones por Campylobacter/microbiología , Preescolar , Lactante , Femenino , Masculino , Diarrea/epidemiología , Diarrea/microbiología , Diarrea/tratamiento farmacológico , Etiopía/epidemiología , Estudios Transversales , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Farmacorresistencia Bacteriana , Prevalencia , Pruebas de Sensibilidad Microbiana , Recién Nacido , Factores de Riesgo
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