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1.
J Infect Public Health ; 17(5): 922-928, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38579539

RESUMO

BACKGROUND: The surveillance of respiratory pathogens in rural areas of West Africa has, to date, largely been focussed on symptoms. In this prospective study conducted prior to the COVID-19 pandemic, we aimed to assess the asymptomatic prevalence of respiratory pathogen carriage in a group of individuals living in a rural area of Senegalese. METHODS: Longitudinal follow up was performed through monthly nasopharyngeal swabbing during the dry season and weekly swabbing during the rainy season. We enrolled 15 individuals from the village of Ndiop. A total of 368 nasopharyngeal swabs were collected over a one-year period. We investigated the prevalence of 18 respiratory viruses and eight respiratory bacteria in different age groups using singleplex and multiplex PCR. RESULTS: In total, 19.56% of the samples (72/368) were positive for respiratory viruses and 13.60% of the samples (50/368) were positive for respiratory bacteria. Coronaviruses (19/72, 26.39%), adenoviruses (17/72, 23.61%), rhinoviruses (14/72, 19.44%), Streptococcus pneumoniae (17/50, 34%), and Moraxella catarrhalis (15/50, 30%) were the most frequently detected viruses. Interestingly, the carriage of respiratory pathogens was shown to be more frequent during the rainy season, as pluviometry was shown to be positively associated with the occurrence of respiratory viruses such as influenza (P = .0078, r2 =.523) and RSV (P = .0055, r2 =.554). CONCLUSIONS: Our results show a non-negligible circulation of respiratory pathogens in a rural area in Senegal (West Africa) with an underestimated proportion of asymptomatic individuals. This study highlights the fact that the circulation of viruses and bacteria in the community has been overlooked.


Assuntos
Infecções Respiratórias , Vírus , Humanos , Lactente , Estações do Ano , Senegal/epidemiologia , Estudos Prospectivos , Pandemias , Nasofaringe , Bactérias
2.
Microorganisms ; 11(11)2023 Nov 10.
Artigo em Inglês | MEDLINE | ID: mdl-38004753

RESUMO

BACKGROUND AND AIMS: Gut microbial imbalances are linked to colorectal cancer (CRC), but archaea's role remains underexplored. Here, using previously published metagenomic data from different populations including Austria, Germany, Italy, Japan, China, and India, we performed bioinformatic and statistical analysis to identify archaeal taxonomic and functional signatures related to CRC. METHODS: We analyzed published fecal metagenomic data from 390 subjects, comparing the archaeomes of CRC and healthy individuals. We conducted a biostatistical analysis to investigate the relationship between Candidatus Mancarchaeum acidiphilum (DPANN superphylum) and other archaeal species associated with CRC. Using the Prokka tool, we annotated the data focusing on archaeal genes, subsequently linking them to CRC and mapping them against UniprotKB and GO databases for specific archaeal gene functions. RESULTS: Our analysis identified enrichment of methanogenic archaea in healthy subjects, with an exception for Methanobrevibacter smithii, which correlated with CRC. Notably, CRC showed a strong association with archaeal species, particularly Natrinema sp. J7-2, Ferroglobus placidus, and Candidatus Mancarchaeum acidiphilum. Furthermore, the DPANN archaeon exhibited a significant correlation with other CRC-associated archaea (p < 0.001). Functionally, we found a marked association between MvhB-type polyferredoxin and colorectal cancer. We also highlighted the association of archaeal proteins involved in the biosynthesis of leucine and the galactose metabolism process with the healthy phenotype. CONCLUSIONS: The archaeomes of CRC patients show identifiable alterations, including a decline in methanogens and an increase in Halobacteria species. MvhB-type polyferredoxin, linked with CRC and species like Candidatus Mancarchaeum acidiphilum, Natrinema sp. J7-2, and Ferroglobus placidus emerge as potential archaeal biomarkers. Archaeal proteins may also offer gut protection, underscoring archaea's role in CRC dynamics.

3.
Curr Issues Mol Biol ; 45(9): 7572-7581, 2023 Sep 19.
Artigo em Inglês | MEDLINE | ID: mdl-37754261

RESUMO

Colorectal cancer (CRC) is a serious public health problem known to have a multifactorial etiology. The association between gut microbiota and CRC has been widely studied; however, the link between archaea and CRC has not been sufficiently studied. To investigate the involvement of archaea in colorectal carcinogenesis, we performed a metagenomic analysis of 68 formalin-embedded paraffin fixed tissues from tumoral (n = 33) and healthy mucosa (n = 35) collected from 35 CRC Tunisian patients. We used two DNA extraction methods: Generead DNA FFPE kit (Qiagen, Germantown, MD, USA) and Chelex. We then sequenced the samples using Illumina Miseq. Interestingly, DNA extraction exclusively using Chelex generated enough DNA for sequencing of all samples. After data filtering and processing, we reported the presence of archaeal sequences, which represented 0.33% of all the reads generated. In terms of abundance, we highlighted a depletion in methanogens and an enrichment in Halobacteria in the tumor tissues, while the correlation analysis revealed a significant association between the Halobacteria and the tumor mucosa (p < 0.05). We reported a strong correlation between Natrialba magadii, Sulfolobus acidocaldarius, and tumor tissues, and a weak correlation between Methanococcus voltae and healthy adjacent mucosa. Here, we demonstrated the feasibility of archaeome analysis from formol fixed paraffin-embedded (FFPE) tissues using simple protocols ranging from sampling to data analysis, and reported a significant association between Halobacteria and tumor tissues in Tunisian patients with CRC. The importance of our study is that it represents the first metagenomic analysis of Tunisian CRC patients' gut microbiome, which consists of sequencing DNA extracted from paired tumor-adjacent FFPE tissues collected from CRC patients. The detection of archaeal sequences in our samples confirms the feasibility of carrying out an archaeome analysis from FFPE tissues using a simple DNA extraction protocol. Our analysis revealed the enrichment of Halobacteria, especially Natrialba magadii, in tumor mucosa compared to the normal mucosa in CRC Tunisian patients. Other species were also associated with CRC, including Sulfolobus acidocaldarius and Methanococcus voltae, which is a methanogenic archaea; both species were found to be correlated with adjacent healthy tissues.

4.
Viruses ; 14(6)2022 06 10.
Artigo em Inglês | MEDLINE | ID: mdl-35746737

RESUMO

Genetic recombination is a major evolutionary mechanism among RNA viruses, and it is common in coronaviruses, including those infecting humans. A few SARS-CoV-2 recombinants have been reported to date whose genome harbored combinations of mutations from different mutants or variants, but only a single patient's sample was analyzed, and the virus was not isolated. Here, we report the gradual emergence of a hybrid genome of B.1.160 and Alpha variants in a lymphoma patient chronically infected for 14 months, and we isolated the recombinant virus. The hybrid genome was obtained by next-generation sequencing, and the recombination sites were confirmed by PCR. This consisted of a parental B.1.160 backbone interspersed with two fragments, including the spike gene, from an Alpha variant. An analysis of seven sequential samples from the patient decoded the recombination steps, including the initial infection with a B.1.160 variant, then a concurrent infection with this variant and an Alpha variant, the generation of hybrid genomes, and eventually the emergence of a predominant recombinant virus isolated at the end of the patient's follow-up. This case exemplifies the recombination process of SARS-CoV-2 in real life, and it calls for intensifying the genomic surveillance in patients coinfected with different SARS-CoV-2 variants, and more generally with several RNA viruses, as this may lead to the appearance of new viruses.


Assuntos
COVID-19 , SARS-CoV-2 , Genoma Viral , Humanos , Hospedeiro Imunocomprometido , Mutação , SARS-CoV-2/genética
5.
J Epidemiol Glob Health ; 12(2): 196-205, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35486358

RESUMO

INTRODUCTION: Following the first year of the COVID-19 pandemic, a complete analysis of the characteristics of the deceased hospitalized patients was performed, to identify factors related to premature mortality and to compare patient profiles according to the epidemic periods. METHODS: Retrospective analysis of 1104 deceased patients in two University Hospitals in South-eastern France, between March 1, 2020 and March 12, 2021 from Hospital's electronic medical records was performed. RESULTS: Mean age was 80 years (± 11.1) and 10% of the deceased were younger than 65 years with specific comorbidities, e.g., genetic conditions, metastatic cancer, or massive obesity. Among the three clusters identified, two clusters (75% of deceased patients) include very elderly patients with numerous comorbidities, and differ by their proportion of dependent institutionalized patients. The third cluster is made up of younger patients with fewer but severe comorbidities. Deceased patients' profiles varied according to the epidemic periods: during the first period (March-June 2020), more patients were institutionalized. The second period (September-December2020) coincided with a higher mortality rate. CONCLUSIONS: This study confirmed that most patients hospitalized and dying from COVID-19 were frail, i.e., elderly and/or highly comorbid and that the small proportion of young patients had severe comorbidities.


Assuntos
COVID-19 , Pandemias , Idoso , Idoso de 80 Anos ou mais , COVID-19/epidemiologia , Comorbidade , Hospitalização , Humanos , Estudos Retrospectivos , SARS-CoV-2
6.
Front Med (Lausanne) ; 9: 794550, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35280874

RESUMO

Smell and taste disorders are frequent symptoms during acute COVID-19 and may persist long after the resolution of the initial phase. This study aims to estimate the proportion and risk factors for smell and/or taste disorders at the onset of symptoms and their persistence after more than 6 months of follow-up in COVID-19 patients. We analyzed a prospective cohort of COVID-19 patients admitted to our institute in Marseille, France in early 2020. After being discharged from the hospital, patients with smell and/or taste disorders were contacted for a telephone interview. Logistic regression analysis was performed to determine the risk factors for smell and/or taste disorders. A total of 3,737 patients were included, of whom 1,676 reported smell and/or taste disorders at the onset of symptoms. Taste and/or smell disorders were independently associated with being younger and female, a lower likelihood of suffering from diabetes, cardiovascular diseases and cancer, a longer delay between the onset of symptoms and consultation, and non-severe forms of COVID-19 at admission. Of the 605 patients with smell and/or taste disorders who were followed-up, 154 (25.5%) reported the persistence of symptoms for more than 6 months. At the time of follow-up, being female, having a chronic respiratory disease and using angiotensin-converting enzyme inhibitors (ACEis) were factors independently associated with the persistence of smell and/or taste disorders. In conclusion, the long-term persistence of olfactory and gustative disorders is frequent among COVID-19 patients, notably affecting female patients and patients who suffered from chronic respiratory diseases before infection. The role of ACEis needs to be further evaluated in larger numbers of patients.

7.
Semin Cancer Biol ; 86(Pt 3): 875-884, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-34979272

RESUMO

The higher incidence of bladder cancer in men has long been attributed to environmental factors, including smoking. The fact that the sex ratio of bladder cancer remains consistently weighted toward men despite the remarkable increase in the prevalence of smoking among women suggests that other risk factors influence the incidence rates of bladder cancer. These factors may include the urinary microbiota. In this study, we provide a review of recent literature regarding the association between bladder cancer and changes in the urinary microbiota, with a focus on the potential role of uropathogens in the microbiota and sex in bladder cancer. Four databases were systematically searched up to 31 March 2021 to identify human case-controlled studies that evaluated the relationship between urinary microbiota and bladder cancer. We combined bacterial taxa that were significantly higher or lower in the bladder cancer group in each study in the urine (voided and catheterized) and tissue samples. Findings from sixteen eligible studies were analyzed. The total sample size of the included studies was 708 participants, including 449 (63.4 %) bladder cancer patients and 259 (36.6 %) participants in the control group. When considering only the taxa that have been reported in at least two different studies, we observed that with regards to neoplastic tissues, no increased taxa were reported, while Lactobacillus (2/5 of the studies on tissue samples) was increased in nonneoplastic-tissue compared to neoplastic-tissues at the genus level. In catheterized urine, Veillonella (2/3 of the studies on catheterized urine) was increased in bladder cancer patients compared to the control groups at the genus level. In voided urine, Acinetobacter, Actinomyces, Aeromonas, Anaerococcus, Pseudomonas, and Tepidomonas were increased in the bladder cancer patients, while Lactobacillus, Roseomonas, Veillonella were increased in the control groups. Regarding gender, the genus Actinotignum was increased in female participants while Streptococcus was increased in male participants at the genus level. Regarding potential uropathogens in the urinary microbiota, Escherichia-Shigella provided conflicting results, with both showing higher and lower levels in the bladder cancer groups. However, the family Enterobacteriaceae was lower in the bladder cancer groups than in the control groups. In conclusion, there is no consensus on what taxa of the urinary microbiota are associated with bladder cancer according to the sample type. Findings on the potential role of uropathogens in the urinary microbiota in bladder cancer remain inconsistent. Due to the limited number of studies, further studies on urinary microbiota and bladder cancer are needed to address this issue. Given that all publications concerning the urinary microbiota and bladder cancer have been performed using 16S rRNA gene sequencing, we propose that polyphasic approaches, including culture-dependent techniques, may allow for a more comprehensive investigation of the urinary microbiota associated with bladder cancer.


Assuntos
Microbiota , Neoplasias da Bexiga Urinária , Humanos , Feminino , Masculino , Neoplasias da Bexiga Urinária/etiologia , Neoplasias da Bexiga Urinária/microbiologia , RNA Ribossômico 16S/genética , Bexiga Urinária/microbiologia , Microbiota/genética , Bactérias/genética
8.
Infect Genet Evol ; 95: 105092, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34571275

RESUMO

OBJECTIVES: To compare the demographics, clinical characteristics and severity of patients infected with nine different SARS-CoV-2 variants, during three phases of the COVID-19 epidemic in Marseille. METHODS: A single centre retrospective cohort study was conducted in 1760 patients infected with SARS-CoV-2 of Nextstrain clades 20A, 20B, and 20C (first phase, February-May 2020), Pangolin lineages B.1.177 (we named Marseille-2) and B.1.160 (Marseille-4) variants (second phase, June-December 2020), and B.1.1.7 (alpha), B.1.351 (beta), P.1 (gamma) and A.27 (Marseille-501) variants (third phase, January 2021-today). Outcomes were the occurrence of clinical failures, including hospitalisation, transfer to the intensive-care unit, and death. RESULTS: During each phase, no major differences were observed with regards to age and gender distribution, the prevalence of chronic diseases, and clinical symptoms between variants circulating in a given phase. The B.1.177 and B.1.160 variants were associated with more severe outcomes. Infections occurring during the second phase were associated with a higher rate of death as compared to infections during the first and third phases. Patients in the second phase were more likely to be hospitalised than those in the third phase. Patients infected during the third phase were more frequently obese than others. CONCLUSION: A large cohort study is recommended to evaluate the transmissibility and to better characterise the clinical severity of emerging variants.


Assuntos
COVID-19/patologia , Diabetes Mellitus/patologia , Genoma Viral , Hipertensão/patologia , Obesidade/patologia , SARS-CoV-2/patogenicidade , Adulto , Idoso , COVID-19/epidemiologia , COVID-19/mortalidade , COVID-19/virologia , Comorbidade , Diabetes Mellitus/epidemiologia , Diabetes Mellitus/mortalidade , Diabetes Mellitus/virologia , Feminino , França/epidemiologia , Genótipo , Cardiopatias/epidemiologia , Cardiopatias/mortalidade , Cardiopatias/patologia , Cardiopatias/virologia , Hospitalização/estatística & dados numéricos , Hospitais , Humanos , Hipertensão/epidemiologia , Hipertensão/mortalidade , Hipertensão/virologia , Unidades de Terapia Intensiva , Masculino , Pessoa de Meia-Idade , Neoplasias/epidemiologia , Neoplasias/mortalidade , Neoplasias/patologia , Neoplasias/virologia , Obesidade/epidemiologia , Obesidade/mortalidade , Obesidade/virologia , Filogenia , Estudos Retrospectivos , SARS-CoV-2/classificação , SARS-CoV-2/genética , SARS-CoV-2/isolamento & purificação , Análise de Sequência de RNA , Índice de Gravidade de Doença , Análise de Sobrevida
9.
Medicine (Baltimore) ; 100(31): e26511, 2021 Aug 06.
Artigo em Inglês | MEDLINE | ID: mdl-34397794

RESUMO

ABSTRACT: Pain sensitization leading to polyalgia can be observed during infectious diseases. The blood pressure cuff-evoked pain threshold (BPCEPT) has been used in previous studies as a screening tool for fibromyalgia.We aimed to use the BPCEPT as a screening test for detecting pain sensitization in patients suffering from infectious diseases. We also investigated whether specific factors were associated with pain sensitization.We performed a prospective comparative study including all patients of our infectious diseases center in a 1-year period. We created a positive control group of patients suffering from fibromyalgia and a negative control group of "apparently healthy" patients consulting for vaccination.The blood pressure (BP) cuff was inflated until the patient signaled that they experienced pain, and this pressure value was noted.A total of 2355 patients were included. The positive control group had significantly lower values of the BPCEPT than all other groups. Among hospitalized patients with infectious diseases, a low BPCEPT was significantly associated with high temperature (P < .0001), older age (P = .002), being a woman (P = .004), high serum glutamic-oxaloacetic transaminase (P = .007), and high C reactive protein levels (P = .02). Moreover, in multivariate analysis, respiratory infection, meningitis, urinary tract infection, febrile neutropenia, and Q fever were independently associated with a low BPCEPT. A significant negative dynamic correlation between the BPCEPT and temperature was also observed (P < .001).We demonstrated for the first time in a large sample of patients that the BPCEPT method can be used to detect pain susceptibility. We observed a significant dynamic correlation between pain sensitization and temperature. Additionally, pain sensitization was associated with some diseases, suggesting that they trigger pain sensitivity.


Assuntos
Determinação da Pressão Arterial , Temperatura Corporal , Infecções/complicações , Dor/etiologia , Fatores Etários , Aspartato Aminotransferases/sangue , Determinação da Pressão Arterial/efeitos adversos , Proteína C-Reativa/metabolismo , Suscetibilidade a Doenças/diagnóstico , Suscetibilidade a Doenças/microbiologia , Suscetibilidade a Doenças/fisiopatologia , Feminino , Fibromialgia/complicações , Humanos , Infecções/fisiopatologia , Masculino , Pessoa de Meia-Idade , Dor/fisiopatologia , Limiar da Dor , Pressão/efeitos adversos , Estudos Prospectivos , Fatores de Risco , Fatores Sexuais
10.
Clin Microbiol Rev ; 34(1)2020 12 16.
Artigo em Inglês | MEDLINE | ID: mdl-33115723

RESUMO

The last 5 years have seen a turning point in the study of the gut microbiota with a rebirth of culture-dependent approaches to study the gut microbiota. High-throughput methods have been developed to study bacterial diversity with culture conditions aimed at mimicking the gut environment by using rich media such as YCFA (yeast extract, casein hydrolysate, fatty acids) and Gifu anaerobic medium in an anaerobic workstation, as well as media enriched with rumen and blood and coculture, to mimic the symbiosis of the gut microbiota. Other culture conditions target phenotypic and metabolic features of bacterial species to facilitate their isolation. Preexisting technologies such as next-generation sequencing and flow cytometry have also been utilized to develop innovative methods to isolate previously uncultured bacteria or explore viability in samples of interest. These techniques have been applied to isolate CPR (Candidate Phyla Radiation) among other, more classic approaches. Methanogenic archaeal and fungal cultures present different challenges than bacterial cultures. Efforts to improve the available systems to grow archaea have been successful through coculture systems. For fungi that are more easily isolated from the human microbiota, the challenge resides in the identification of the isolates, which has been approached by applying matrix-assisted laser desorption ionization-time of flight mass spectrometry technology to fungi. Bacteriotherapy represents a nonnegligible avenue in the future of medicine to correct dysbiosis and improve health or response to therapy. Although great strides have been achieved in the last 5 years, efforts in bacterial culture need to be sustained to continue deciphering the dark matter of metagenomics, particularly CPR, and extend these methods to archaea and fungi.


Assuntos
Bactérias/isolamento & purificação , Técnicas Bacteriológicas/métodos , Meios de Cultura/química , Bactérias/classificação , Bactérias/metabolismo , Citometria de Fluxo , Microbioma Gastrointestinal , Humanos
11.
Travel Med Infect Dis ; 36: 101768, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32504668

RESUMO

BACKGROUND: No research has been conducted on the clinical characteristics and outcomes of homeless patients (HP) hospitalized in Infectious Disease Units (IDU). METHODS: We conducted a retrospective survey among 98 HP and 98 non-HP admitted between 2017 and 2018 in several IDUs in Marseille, France. RESULTS: HP were more likely to be migrant, to report frequent alcohol consumption or illicit drug use, and to present with respiratory symptoms at admission compared to controls. The most common final diagnoses in HP were respiratory tract infections (other than pulmonary tuberculosis [PTB], 35.7%), sexually transmitted infections (20.4%), cutaneous and mucosal infections (19.4%) and tuberculosis (12.2%). Sexually transmitted infections and ectoparasite infestations were significantly more frequent in HP compared to controls. One HP died from pleural effusion as a complication of PTB. The surviving HP had a longer length of stay (LOS, average 11.6 ± 13.6 days, p < 0.0001) than controls; independent factors of increased LOS were tobacco use (p = 0.009), tuberculosis infection (p < 0.0001), urinary tract infection (p = 0.018) and bacteraemia (p = 0.018). After hospital discharge, attendance at subsequent planned consultations was significantly lower in HP (0.72 ± 1.25 times/persons) compared to controls (2.03 ± 2.2). CONCLUSIONS: We suggest that HP present specific demographic characteristics and patterns of infectious diseases compared to other patients and therefore require adapted management.


Assuntos
Doenças Transmissíveis , Pessoas Mal Alojadas , Migrantes , França , Humanos , Estudos Retrospectivos
12.
Sci Rep ; 10(1): 7705, 2020 05 07.
Artigo em Inglês | MEDLINE | ID: mdl-32382092

RESUMO

Uncontrolled oxidative stress, reported in Salmonella and HIV infections, colorectal cancer or severe acute malnutrition, has been associated with anaerobic gut microbiome alteration, impaired butyrate production, mucosal immunity dysregulation and disruption of host-bacterial mutualism. However, the role of major antioxidant molecules in the human body, such as glutathione, ascorbic acid and uric acid, has been neglected in this context. Here, we performed an in vitro metabolomics study of the 3 most odorous anaerobic microbes isolated from the human gut in our laboratory (Clostridium sporogenes, Clostridium subterminale and Romboutsia lituseburensis) when grown in anaerobiosis or in aerobiosis with these 3 antioxidant molecules via gas and liquid chromatography-mass spectrometry (GC/MS and LC/MS). There was no growth or volatile organic compound production in aerobic cultures without the 3 antioxidant molecules. In anaerobiosis, the major metabolic products of the bacteria were thiols, alcohols and short-chain fatty acid esters. The production of alkanes, cycloheptatriene and, paradoxically, increased butyrate production, was observed in the cultures grown in aerobiosis with the 3 antioxidant molecules. The qualitative shift suggests specific molecular mechanisms that remain to be elucidated. The increased production of butyrate, but also isobutyrate and isovalerate in vitro suggests that these 3 antioxidant molecules contributed to the maintenance and active resilience of host-bacterial mutualism against mucosal oxygen and uncontrolled oxidative stress in vivo.


Assuntos
Antioxidantes/metabolismo , Microbioma Gastrointestinal/genética , Metabolômica , Estresse Oxidativo/genética , Aerobiose/genética , Anaerobiose/genética , Ácido Ascórbico/metabolismo , Butiratos/metabolismo , Cromatografia Líquida , Clostridiales/metabolismo , Clostridium/metabolismo , Cromatografia Gasosa-Espectrometria de Massas , Glutationa/metabolismo , Humanos , Oxigênio/metabolismo , Ácido Úrico/metabolismo
14.
Emerg Infect Dis ; 25(11): 2131-2133, 2019 11.
Artigo em Inglês | MEDLINE | ID: mdl-31625862

RESUMO

We used shell-vial assay with a medium that buffered rifampin to isolate routine culture-resistant Mycobacterium tuberculosis bacteria from cerebrospinal fluid and rifampin-containing intervertebral disc and vertebral corpus of a patient in treatment for Pott's disease and disseminated tuberculosis. Whole-genome sequencing confirmed M. tuberculosis lineage 4 (Euro-American) strain.


Assuntos
Antituberculosos/farmacologia , Mycobacterium tuberculosis/efeitos dos fármacos , Tuberculose Resistente a Múltiplos Medicamentos/epidemiologia , Tuberculose Resistente a Múltiplos Medicamentos/microbiologia , Biópsia , França/epidemiologia , Genoma Bacteriano , Humanos , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Mycobacterium tuberculosis/genética , Tuberculose Resistente a Múltiplos Medicamentos/diagnóstico , Tuberculose Resistente a Múltiplos Medicamentos/tratamento farmacológico
16.
Am J Trop Med Hyg ; 100(6): 1552-1555, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-30994102

RESUMO

Vaginal self-sampling and human papillomavirus (HPV) DNA testing can be useful tools for women with limited access to health care living in sub-Saharan Africa. To assess the feasibility and acceptability of vaginal self-sampling and high-risk HPV prevalence in two villages of central Senegal, women were asked to self-sample vaginal swabs for HPV detection in May, 2016. Vaginal swabs were collected from 133 women and were tested for HPV genotyping. The acceptability rate of vaginal self-sampling was 98.5%, and 99.2% of the women (133/134) used the device correctly. The quality of self-sampling was satisfactory in 100% of the samples; 10.5% of the samples were positive for HPV, including 6% with high-risk HPV types and 4% with low-risk HPV types. This preliminary study indicates that vaginal self-sampling is a valuable strategy for high-risk HPV detection and cervical cancer screening in a population of women not attending gynecologic screening in rural areas of Senegal.


Assuntos
Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/diagnóstico , População Rural , Manejo de Espécimes , Doenças Vaginais/virologia , Esfregaço Vaginal/normas , Adulto , Detecção Precoce de Câncer , Estudos de Viabilidade , Feminino , Humanos , Pessoa de Meia-Idade , Papillomaviridae/classificação , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/virologia , Aceitação pelo Paciente de Cuidados de Saúde , Senegal/epidemiologia , Doenças Vaginais/epidemiologia
17.
Infection ; 47(4): 637-641, 2019 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29987509

RESUMO

INTRODUCTION: Many clinical manifestations can be related to Tropheryma whipplei infection. CASE REPORT: We report a Tropheryma whipplei limbic encephalitis developed as a relapse of classical Whipple's disease. DISCUSSION: This case is to the best of our knowledge the first proof of the effective brain-blood barrier crossing of both doxycycline and hydroxychloroquine as demonstrated by direct concentration monitoring on brain biopsy.


Assuntos
Encefalite Límbica/diagnóstico , Tropheryma/isolamento & purificação , Doença de Whipple/diagnóstico , Biópsia , Cérebro/patologia , Humanos , Imuno-Histoquímica , Encefalite Límbica/microbiologia , Encefalite Límbica/patologia , Masculino , Pessoa de Meia-Idade , Reação em Cadeia da Polimerase , Recidiva , Doença de Whipple/complicações , Doença de Whipple/patologia
18.
BMC Microbiol ; 18(1): 157, 2018 10 24.
Artigo em Inglês | MEDLINE | ID: mdl-30355340

RESUMO

BACKGROUND: Most studies on the human microbiota have analyzed stool samples, although a large proportion of the absorption of nutrients takes place in upper gut tract. We collected samples from different locations along the entire gastrointestinal tract from six patients who had simultaneously undergone upper endoscopy and colonoscopy, to perform a comprehensive analysis using culturomics with matrix assisted laser desorption ionisation - time of flight (MALDI-TOF) identification and by metagenomics targeting the 16S ribosomal ribonucleic acid (rRNA) gene. RESULTS: Using culturomics, we isolated 368 different bacterial species, including 37 new species. Fewer species were isolated in the upper gut: 110 in the stomach and 106 in the duodenum, while 235 were isolated from the left colon (p < 0.02). We isolated fewer aero-intolerant species in the upper gut: 37 from the stomach and 150 from the left colon (p < 0.004). Using metagenomics, 1,021 species were identified. The upper gut microbiota was revealed to be less rich than the lower gut microbiota, with 37,622 reads from the stomach, 28,390 from the duodenum, and 79,047 from the left colon (p < 0.009). There were fewer reads for aero-intolerant species in the upper gut (8,656 in the stomach, 5,188 in the duodenum and 72,262 in the left colon, p < 0.02). Patients taking proton pump inhibitors (PPI) were then revealed to have a higher stomach pH and a greater diversity of species in the upper digestive tract than patients not receiving treatment (p < 0.001). CONCLUSION: Significant modifications in bacterial composition and diversity exist throughout the gastrointestinal tract. We suggest that the upper gut may be key to understanding the relationship between the gut microbiota and health.


Assuntos
Bactérias/classificação , Colo/microbiologia , Microbioma Gastrointestinal , Metagenômica , Estômago/microbiologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Bactérias/isolamento & purificação , Colonoscopia , Contagem de Colônia Microbiana , DNA Bacteriano/genética , Endoscopia do Sistema Digestório , Feminino , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Concentração de Íons de Hidrogênio , Masculino , Pessoa de Meia-Idade , Inibidores da Bomba de Prótons/administração & dosagem , RNA Ribossômico 16S/genética , Análise de Sequência de DNA , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Adulto Jovem
19.
Int J Infect Dis ; 75: 15-17, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-30096359

RESUMO

Whipple's disease (WD) is a rare chronic and systemic infection caused by the ubiquitous actinomycete Tropheryma whipplei. A case of localized infection with mesenteric adenopathy associated with a prolonged unexplained fever is reported herein. Screening by PCR on saliva and stool was positive, and T. whipplei was formally identified by specific PCR on duodenal and mesenteric adenopathy biopsies. Histological analysis did not demonstrate periodic acid-Schiff-positive macrophages or positive T. whipplei immunochemistry in either the duodenal mucosa or mesenteric nodes. Treatment with hydroxychloroquine and doxycycline allowed a rapid resolution of symptoms, and subsequent saliva and stool PCR results were negative.


Assuntos
Linfadenite Mesentérica/diagnóstico , Reação em Cadeia da Polimerase/métodos , Doença de Whipple/diagnóstico , Adulto , Biópsia , Feminino , Humanos , Linfadenite Mesentérica/tratamento farmacológico , Doença de Whipple/tratamento farmacológico
20.
Curr Microbiol ; 75(10): 1274-1281, 2018 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29858619

RESUMO

A novel strain of a Gram-stain negative, non-motile, non-spore forming rod-shaped, obligate anaerobic bacterium, designated AT11T, was isolated from a stool sample of a morbidly obese woman living in Marseille, France. This bacterium was characterized using biochemical, chemotaxonomic, and phylogenetic methods. The 16S rRNA gene sequence analysis showed that strain AT11T had a 97.8% nucleotide sequence similarity with Eisenbergiella tayi strain B086562T, the closest species with standing in nomenclature. The major cellular fatty acids of the novel isolate were C16:0 followed by saturated or unsaturated C18 fatty acids (C18:1n9, C18:1n5 and C18:0). The draft genome of strain AT11T is 7,114,554 bp long with 48% G+C content. 6176 genes were predicted, including 6114 protein-coding genes and 62 were RNAs (with 2 5S rRNA genes, two 16S rRNA genes, two 23S rRNA genes, and 56 tRNA genes). The digital DNA-DNA hybridization (dDDH) relatedness between the new isolate and E. tayi strain B086562T was 23.1% ± 2.2. Based on the phenotypic, chemotaxonomic, genomic, and phylogenetic characteristics, Eisenbergiella massiliensis sp. nov., is proposed. The type strain is AT11T (= DSM 100838T = CSUR P2478T).


Assuntos
Fezes/microbiologia , Genoma Bacteriano , Obesidade Mórbida/microbiologia , Técnicas de Tipagem Bacteriana , Cirurgia Bariátrica , Composição de Bases , DNA Bacteriano/genética , Ácidos Graxos/química , Ácidos Graxos/metabolismo , França , Microbioma Gastrointestinal , Genômica , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade Mórbida/cirurgia , Filogenia , RNA Ribossômico 16S/genética
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