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OBJECTIVES: To explore the value of different endoscopic scoring methods in assessing disease activity in pediatric Crohn's disease (CD). METHODS: A total of 70 children diagnosed with CD at the Children's Hospital of Chongqing Medical University from January 2018 to January 2023 were included. Clinical disease activity was assessed using the Pediatric Crohn's Disease Activity Index (PCDAI), while different endoscopic scores were assigned based on endoscopic findings. Spearman rank correlation analysis was used to evaluate the correlation between each endoscopic scoring method and PCDAI as well as laboratory indicators. Kappa test was used to assess the consistency between colonoscopy/capsule endoscopy scoring methods and PCDAI in determining CD activity. Receiver operating characteristic curve analysis was performed to assess the diagnostic efficacy of laboratory indicators in predicting endoscopic activity. RESULTS: The PCDAI score showed a moderate positive correlation with the scores of Crohn's Disease Endoscopic Index of Severity (CDEIS) (rs=0.696, P<0.01), Simple Endoscopic Score for Crohn's Disease (SES-CD) (rs=0.680, P<0.01), Lewis Score (rs=0.540, P<0.01), and Capsule Endoscopy-Crohn's Disease Index (CE-CD) (rs=0.502, P<0.01). The consistency between all endoscopic scoring methods and PCDAI in determining CD activity was poor (Kappa=0.069-0.226). Erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), hematocrit (HCT), and serum albumin (ALB) levels showed a moderate correlation with the PCDAI score and the scores of colonoscopy scoring methods (CDEIS and SES-CD) (|rs|=0.581-0.725, P<0.01), but a weak correlation with the scores of capsule scoring methods (P<0.05). ESR and CRP had higher area under the curve (AUC) values in predicting disease activity based on PCDAI, CDEIS, SES-CD, and Lewis Score compared to HCT and ALB (P<0.05). CONCLUSIONS: CDEIS, SES-CD, Lewis Score, and CE-CD can be used to evaluate disease activity in pediatric CD, but they do not fully correspond with disease activity assessed by PCDAI. Elevated levels of ESR and CRP can predict clinical and endoscopic disease activity in children with CD.
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Colonoscopia , Doença de Crohn , Índice de Gravidade de Doença , Humanos , Doença de Crohn/diagnóstico , Doença de Crohn/patologia , Doença de Crohn/sangue , Criança , Masculino , Feminino , Adolescente , Pré-Escolar , Endoscopia por Cápsula , Proteína C-Reativa/análise , Sedimentação Sanguínea , Curva ROCRESUMO
The resistance of Helicobacter pylori (H. pylori) to antibiotics has been increasing worldwide and varies across different geographic areas and times. Limited studies reported the prevalence of antibiotic resistance and its related gene mutations in children in Chongqing, a city located in southwest China. We collected 112 H. pylori strains isolated from gastric biopsies of 156 children at Children's Hospital of Chongqing Medical University and calculated resistance rates of these strains to six antibiotics. The A2143G and A2142G mutations in 23S rRNA gene, which are related to clarithromycin resistance, and Asn87 and Asp91 mutations in gyrA gene, which are related to levofloxacin resistance, were investigated in 102 strains. The resistance rates to clarithromycin, metronidazole, and levofloxacin were 47.3% (53/112), 88.4% (99/112), and 18.8% (21/112), respectively. No resistance to amoxicillin, tetracycline, and furazolidone was observed. Dual and triple resistance percentages were 37.5% (42/112) and 10.7% (12/112), respectively. The detection rate of A2143G mutation in 23S rRNA gene was 83.3% (40/48). The detection rates of mutations of Asn87 and Asp91 in gyrA gene were 52.6% (10/19) and 36.8% (7/19), respectively. Conclusion: The prevalence of H. pylori resistance to clarithromycin, metronidazole, and levofloxacin was high in children in Chongqing, China. The A2143G mutation was detected in most clarithromycin-resistant strains, and Asn87 and Asp91 of gyrA mutation points were common in levofloxacin-resistant strains. In clinical practice, anti-H. pylori therapy should be individualized based on a susceptibility test. What is Known: ⢠The resistance of H. pylori to antibiotics changes with the geographic areas and that in Asia the resistance rate is high. ⢠Mutation plays a vital role in antibiotics resistance of H. pylori. What is New: ⢠High resistance rates to single and multiple antibiotics in children of Chongqing, a city located in southwest China, were observed. ⢠Molecular assays showed good conformance with susceptibility test results to direct antibiotic resistance of H. pylori.
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Infecções por Helicobacter , Helicobacter pylori , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Criança , China/epidemiologia , Claritromicina/farmacologia , Claritromicina/uso terapêutico , Farmacorresistência Bacteriana/genética , Infecções por Helicobacter/tratamento farmacológico , Infecções por Helicobacter/epidemiologia , Humanos , Levofloxacino/uso terapêutico , Metronidazol/farmacologia , Metronidazol/uso terapêutico , Testes de Sensibilidade Microbiana , RNA Ribossômico 23S/genéticaRESUMO
OBJECTIVES: To study the clinical features of children with colorectal polyps and the efficacy of endoscopic treatment. METHODS: A retrospective analysis was performed on the medical data of 1 351 children with colorectal polyps who were admitted and received colonoscopy and treatment in the past 8 years, including clinical features and the pattern and outcomes of endoscopic treatment. RESULTS: Among the 1 351 children, 893 (66.10%) were boys and 981 (72.61%) had an age of 2-<7 years, and hematochezia (1 307, 96.74%) was the most common clinical manifestation. Of all the children, 89.27% (1 206/1 351) had solitary polyps, and 95.77% (1 290/1 347) had juvenile polyps. The polyps were removed by electric cauterization with hot biopsy forceps (6 cases) or high-frequency electrotomy and electrocoagulation after snare ligation (1 345 cases). A total of 1 758 polyps were resected, among which 1 593 (90.61%) were pedunculated and 1 349 (76.73%) had a diameter of <2 cm. Postoperative complications included bleeding in 51 children (3.77%), vomiting in 87 children (6.44%), abdominal pain in 14 children (1.04%), and fever in 39 children (2.89%), while no perforation was observed. The children aged <3 years had the highest incidence rates of postoperative bleeding and fever (P<0.0125), and the children with a polyp diameter of ≥2 cm had significantly higher incidence rates of postoperative bleeding, vomiting, and fever (P<0.05). CONCLUSIONS: Solitary polyps, pedunculated polyps, and juvenile polyps are common types of pediatric colorectal polyps. Electric cauterization with hot biopsy forceps or high-frequency electrotomy and electrocoagulation after snare ligation can effectively remove colorectal polyps in children, with good efficacy and few complications. Younger age and larger polyp diameter are associated with a higher risk of postoperative bleeding.
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Pólipos do Colo , Criança , Pólipos do Colo/patologia , Pólipos do Colo/cirurgia , Colonoscopia , Feminino , Humanos , Pólipos Intestinais/patologia , Pólipos Intestinais/cirurgia , Masculino , Estudos Retrospectivos , VômitoRESUMO
BACKGROUND: The role of atopy patch test (APT) in the diagnosis of food allergy (FA) remains largely controversial. In our meta-analysis, we aimed to evaluate the accuracy of APT for diagnosing FA in children. METHODS: Pubmed, Embase and Cochrane Library were searched for studies regarding the diagnostic value of APT for FA in children compared to oral food challenge (double-blind placebo-controlled food challenge and/or open food challenge). The last search was conducted on November 11, 2017. Two reviewers independently screened relevant studies and assessed the quality by QUADAS-2. Meta-analysis was performed to calculate the pooled sensitivity, specificity, DOR (diagnostic odds ratio), PLR (positive likelihood ratio), NLR (negative likelihood ratio) with their 95% confidence intervals (CIs). Subgroup analyses were conducted according to different food allergens, atopic dermatitis, gastrointestinal symptoms, and age younger than 3 years. RESULTS: Forty-one studies were included in the meta-analysis. The pooled sensitivity, specificity, PLR, NLR and DOR were 50.30% (95% CI 48.40%-52.30%), 86.60% (95% CI 85.30%-87.80%), 3.405 (95% CI 2.594-4.470), 0.545 (95% CI 0.469-0.634) and 7.528 (95% CI 5.507-11.206), respectively. However, for children with FA-related gastrointestinal symptoms, the pooled sensitivity and specificity were 57.40% (95% CI 52.10%-62.50%) and 91.50% (95% CI 88.30%-94.10%) respectively. CONCLUSIONS: Our findings suggest that APT is specific but not sensitive for diagnosing FA in children, especially in children with FA-related gastrointestinal symptoms.
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Hipersensibilidade Alimentar/diagnóstico , Gastroenteropatias/diagnóstico , Testes do Emplastro/métodos , Alérgenos/imunologia , Criança , Pré-Escolar , Humanos , Valor Preditivo dos Testes , Prognóstico , Sensibilidade e EspecificidadeRESUMO
Therapy-related side effects and severe antimicrobial resistance still remain an obstacle to Helicobacter pylori eradication. This meta-analysis aimed to investigate the efficacy of Lactobacillus-supplemented triple therapy on H. pylori eradication rates and therapy-related side effects in children. Five studies involving 484 pediatric patients were included in our analysis. The pooled relative risk (RR) for eradication rates in the Lactobacillus group versus the control group was 1.19 [95% confidence interval (CI) 1.07-1.33]. In subgroup analyses based on dose and duration of Lactobacillus supplementation, the pooled RRs for eradication rates were 1.36 (95% CI 1.15-1.60) in the high-dose group, 1.08 (95% CI 0.86-1.35) in the low-dose group, 1.24 (95% CI 1.06-1.46) in the long-term group, and 1.17 (95% CI 0.96-1.44) in the short-term group. With respect to side effects, Lactobacillus supplementation significantly reduced the incidence of diarrhea (RR = 0.30, 95% CI 0.10-0.85).Conclusions: Lactobacillus, as an adjunct to triple therapy, can increase H. pylori eradication rates as well as reduce the incidence of therapy-related diarrhea in children. And a higher dose and a longer duration of supplementation may conduce to the positive impact of Lactobacillus on H. pylori eradication. What is Known: ⢠Probiotics-supplemented triple therapy may be beneficial in improving H. pylori eradication rates and reducing therapy-related side effects in children. However, not all probiotics are beneficial to H. pylori eradication and the pooled outcomes based on different probiotics may be erroneously extrapolated to other ineffective strains. What is New: ⢠Lactobacillus, as an adjunct to triple therapy, can increase H. pylori eradication rates as well as reduce the incidence of therapy-related diarrhea in children.
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Antibacterianos/uso terapêutico , Infecções por Helicobacter/tratamento farmacológico , Helicobacter pylori/efeitos dos fármacos , Lactobacillus , Probióticos/uso terapêutico , Adolescente , Antibacterianos/efeitos adversos , Criança , Pré-Escolar , Suplementos Nutricionais , Quimioterapia Combinada , Humanos , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do TratamentoRESUMO
Food allergen-specific immune tolerance is defined as nonresponsiveness of the adaptive immune system to food antigens. Failed development or inhibition of such tolerance may cause food allergy. With the increasing incidence rate of food allergy year by year, more and more studies have found the association between food allergy and various diseases. The development of food allergen-specific immune tolerance in childhood has been taken more and more seriously. In recent years, many studies have shown that the development of food allergen-specific immune tolerance is influenced by various factors, which can be roughly divided into antigens, organisms, and environment. This article reviews the influencing factors for the development of immune tolerance to food allergens in children, in order to provide help for reducing the incidence of food allergy and improving the prognosis of food allergy.
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Hipersensibilidade Alimentar , Alérgenos , Criança , Humanos , Tolerância Imunológica , IncidênciaRESUMO
OBJECTIVE: To study the clinical features and etiology of abdominal distension in children with different ages. METHODS: A retrospective analysis was performed for the clinical data of 1 561 children who were admitted due to abdominal distension from January 2013 to October 2016, including clinical manifestations, radiological examination, pathological results, and disease diagnosis. RESULTS: Among the 1 561 children, there were 823 neonates (aged <28 days), 307 infants (aged 28 days to 1 year), 186 toddlers (aged 1-3 years), 120 preschool children (aged 3-6 years), 106 school-aged children (aged 6-12 years), and 19 adolescents (aged 12-17 years). Vomiting was the major associated symptom in neonates, infants, toddlers, and school-aged children, abdominal pain was the major associated symptom in pre-school children, and vomiting and abdominal pain were the major associated symptoms in adolescents. Hypoactive bowel sound was the major accompanying sign in neonates and infants, and abdominal tenderness was the major accompanying sign in the other four age groups. Plain abdominal radiograph showed intestinal inflation in neonates and intestinal inflation with an air-fluid level in the other five age groups. Histopathological examination was performed for 339 children and the pathological results of intestinal tissue showed small, few, or poorly developed submucosal ganglion cells in neonates, intestinal inflammation/bleeding/necrosis in infants, and appendicitis in the other age groups. Necrotizing enterocolitis was the main cause of abdominal distension in neonates (34.4%), and intestinal obstruction was the main cause in infants (36.8%), toddlers (52.2%), pre-school children (51.7%), school-aged children (62.3%), and adolescents (52.6%). CONCLUSIONS: Vomiting is a common symptom in children with abdominal distension in all age groups. Neonates and infants with abdominal distension often present with hypoactive bowel sounds, and children over 1 year old mainly suffer from abdominal tenderness. Necrotizing enterocolitis is the most common cause of neonatal abdominal distension, and abdominal distension in the other age groups is mainly attributed to intestinal obstruction.
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Apendicite , Enterocolite Necrosante , Doenças do Recém-Nascido , Enteropatias , Adolescente , Criança , Pré-Escolar , Hemorragia , Humanos , Lactente , Recém-Nascido , Estudos RetrospectivosRESUMO
It has been suggested that n-3 long-chain polyunsaturated fatty acids (n-3 LC-PUFAs) have anti-inflammatory properties and may reduce the risk of allergic disease. Fish is a great source of n-3 LC-PUFAs. However, the effect of fish on allergic disease remains controversial. PubMed, EMBASE, and Cochrane Central Register of Controlled Trials were searched for randomized controlled trials (RCTs) and prospective cohort studies regarding the effect of fish intake during pregnancy or infancy on allergic outcomes in children. The outcomes of interest were atopy, eczema, allergic rhinitis, wheeze, asthma, and food allergy. One RCT and 17 publications from 13 prospective cohort studies were included for maternal fish intake during pregnancy, and eight publications from five prospective cohort studies for fish intake in infancy. Pooled analysis suggested that maternal fish intake during pregnancy was not associated with lower risk of any allergic outcome, both in RCT and observational studies. Consumption of fish during the first year of life reduced the risk of eczema (RR 0.61; 95% CI 0.47, 0.80; p = 0.0003; I2 = 68%) and allergic rhinitis (RR 0.54; 95% CI 0.36, 0.81; p = 0.003; I2 = 74%). Current evidence indicates that fish intake in infancy could reduce the risk of eczema and allergic rhinitis in children, whereas maternal fish intake during pregnancy does not affect any atopic outcome. The intake of fish per se in infancy, not specially n-3 LC-PUFAs, may have an allergy protective effect. High-quality and adequately powered RCTs are warranted to confirm this.
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Ingestão de Alimentos , Ácidos Graxos Ômega-3/metabolismo , Produtos Pesqueiros , Hipersensibilidade/epidemiologia , Efeitos Tardios da Exposição Pré-Natal/epidemiologia , Criança , Dieta , Feminino , Humanos , GravidezRESUMO
[This corrects the article DOI: 10.3389/fphar.2022.831912.].
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Background: Treatment of functional dyspepsia (FD) in children is generally symptomatic and unsatisfactory. Traditional Chinese medicines, such as Shenqu Xiaoshi Oral Liquid (SXOL), have been recommended to alleviate dyspeptic symptoms. However, evidence of their safety and efficacy remains limited to date. AIM: To assess whether 2 weeks of therapy with SXOL was non-inferior to domperidone syrup in children with FD. Methods: In this randomized, double-blind, double-simulated, non-inferiority, multi-center clinical trial, we recruited children (3-14 years) with FD according to the Rome IV criteria from 17 tertiary medical centers across China. Patients were randomly allocated (1:1) to receive SXOL or domperidone syrup for 2 weeks. We compared the participants' clinical scores from both groups based on the severity and frequency of dyspepsia symptoms according to Rome IV criteria (0, 1, 2, and 4 weeks after randomization). The primary endpoint was the total response rate, which was defined as the proportion of patients with a decrease of 30% or more in the FD symptoms clinical score from baseline, at the end of the 2-weeks treatment. A non-inferiority margin of -10% was set. Secondary endpoints and adverse events were assessed. This trial is registered with www.Chictr.org.cn, number ChiCTR1900022654. Results: Between February 2019 and March 2021, a total of 373 patients were assessed for eligibility, and 356 patients were enrolled and randomized. The clinical response rate at week two was similar for SXOL [118 (83.10%) of 142] and domperidone [128 (81.01%) of 158]; difference 2.09; 95% CI -6.74 to 10.71, thereby establishing non-inferiority. The total FD symptom scores were significantly improved in the two groups at 1-, 2-, and 4-weeks follow-up periods (p < 0.005). The decrease in symptom score compared with the baseline were similar between these two groups. Over the total study period, 10 patients experienced at least one treatment-related adverse event [six (3.37%)] in the SXOL group, four [(2.25%) in the domperidone group], although no serious adverse event was noted. Conclusion: Treatment with SXOL effectively improves dyspeptic symptoms and is well tolerated. In addition, it is not inferior to domperidone syrup and leads to sustained improvement in Chinese children with FD.
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PURPOSE: Nontyphoidal Salmonella (NTS) is a leading bacterial cause for acute gastroenteritis in children. With the increasing use of antibiotics worldwide, antibiotic resistance has become a global problem. However, data on NTS infections and changes in antibiotic resistance among children remain limited in China. We aimed to characterize the prevalence, clinical feature, serotype and the changes of antibiotic resistance of NTS in children in Chongqing. METHODS: 501 hospitalized children with NTS infections (confirmed by positive NTS culture) in Children's Hospital of Chongqing Medical University from January 2009 to December 2018 were included. The clinical data and drug sensitivity test results were retrospectively reviewed and analyzed. Antibiotic resistance in NTS infections was compared between 2009-2013 and 2014-2018. RESULTS: A total of 501 isolates were detected. Most NTS infections occurred in children under three years old, which mainly occurred between July and October. The numbers of patients with diarrhea, fever, and vomiting were 472 (94.2%), 422 (84.2%) and 146 (29.1%), respectively. Serogroup B (67.5%) was the predominant serogroup isolates. And Salmonella Typhimurium was the most common serotype (79.2%). The study compared the drug resistance of NTS from 2009 to 2013 with that from 2014 to 2018. We found the drug resistance rates of NTS to cefazolin, cefotaxime, ciprofloxacin, levofloxacin and imipenem showed an upward trend. The drug resistance rates of NTS to chloramphenicol, ampicillin, ceftriaxone, cefepime and compound sulfamethoxazole decreased slightly, but still showed high drug resistance rates. And drug resistance rates of NTS to piperacillin/tazobactam and ceftazidime decreased significantly in the last ten years. Multi-drug resistance (MDR) isolates, were detected among 69 cases (13.7%) of 501 children with NTS infections. CONCLUSION: The overall antibiotic resistance rates remained at a high level in Chongqing. Continuous surveillance of antibiotic resistance in NTS and control measures such as avoiding unnecessary antibiotic therapy in general NTS gastroenteritis are important. For severe or invasive infections caused by NTS infection in Southwest China, the use of ceftazidime is recommended until antibiotic sensitivity test results are available. And the choice of antibiotics should be based on the curative effect and the antibiotics sensitivity results.
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To investigate whether probiotic supplementation could reduce the risk of fungal infection in preterm neonates in neonatal intensive care units (NICUs), we systematically searched PubMed, EMBASE, and the Cochrane Central Register of Controlled Trials databases for randomized controlled trials (RCTs) focusing on the effect of probiotics on fungal infection in preterm neonates. The outcomes of interest were Candida colonization and invasive fungal sepsis. Seven trials involving 1371 preterm neonates were included. Meta-analysis (fixed-effects model) showed that probiotic supplementation was significantly associated with a lower risk of Candida colonization (2 RCTs, n = 329; relative risk (RR), 0.43; 95% confidence interval (CI), 0.27-0.67; p = 0.0002; I2 = 0%), and invasive fungal sepsis (7 RCTs, n = 1371; RR, 0.64; 95% CI, 0.46-0.88; p = 0.006; I2 = 13%). After excluding one study with a high baseline incidence (75%) of fungal sepsis, the effect of probiotics on invasive fungal sepsis became statistically insignificant (RR, 0.88; 95% CI, 0.44-1.78; p = 0.72; I2 = 15%). When using the random-effects model, the effect of probiotics remained favorable for Candida colonization (RR, 0.43; 95% CI 0.27-0.68; p = 0.0002; I2 = 0%) but not for fungal sepsis (RR, 0.64; 95% CI 0.38-1.08; p = 0.10; I2 = 13%). Current evidence indicates that probiotics can reduce the risk of Candida colonization in preterm neonates in NICUs. Limited data support that probiotic supplementation prevents invasive fungal sepsis in preterm neonates. High-quality and adequately powered RCTs are warranted.
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Candidíase/tratamento farmacológico , Suplementos Nutricionais , Sepse Neonatal/prevenção & controle , Probióticos/uso terapêutico , Humanos , Recém-Nascido , Recém-Nascido Prematuro , Sepse Neonatal/microbiologia , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
OBJECTIVE: To study the incidence of viraemia and extraintestinal organ damage in children with acute rotavirus (RV) gastroenteritis. METHODS: Eighty-three children with acute rotavirus gastroenteritis were hospitalized from October 2002 to March 2003, whose blood and fecal samples were obtained on admission. Rotavirus RNA (encoding the VP7 outer capsid protein) were detected in blood and fecal samples by nest reverse transcription-polymerase chain reaction (RT-PCR). According to the result of blood RV-RNA, the patients were divided into RV-RNA positive group and RV-RNA negative group. The differences between these two groups in the severity of gastroenteritis and extraintestinal organ damage were analyzed. RESULTS: Eighty-two of 83 stool samples from the children with rotavirus infection were positive for rotavirus RNA. Sixteen of 83 blood samples were positive for rotavirus RNA with a positive rate of 19.3%. The nucleotide sequence of cloned cDNAs, resembling part of the VP7 gene, was identical from paired blood and fecal samples. There were no significant differences between blood RV-RNA positive group and blood RV-RNA negative group in the rate and degree of fever, diarrhea, dehydration, metabolic acidosis, hypokalemia and myocardial damage (P>0.05); while the incidences of liver damage, rash, lower respiratory tract infection and the central nervous system involvement in the blood RV-RNA positive group were significantly higher than those in the blood RV-RNA negative group (P<0.05). CONCLUSION: Viraemia is present in the children with acute rotavirus gastroenteritis. Viraemia might be an important mechanism by which rotavirus spread to the extraintestinal sites resulting in organs damage.
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Enterite/virologia , Pneumonia/virologia , Infecções por Rotavirus/virologia , Rotavirus/isolamento & purificação , Viremia/virologia , Sequência de Bases , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Dados de Sequência Molecular , Miocardite/virologia , Estudos Prospectivos , Rotavirus/genética , Análise de Sequência de DNARESUMO
The effect of probiotics on late-onset sepsis (LOS) in preterm neonates remains controversial. The authors systematically reviewed the literature to investigate whether enteral probiotic supplementation reduced the risk of LOS in preterm neonates in neonatal intensive care units.PubMed, Embase, and Cochrane Central Register of Controlled Trials were systematically searched for randomized controlled trials (RCTs) regarding the effect of probiotics in preterm neonates. The primary outcome was culture-proven bacterial and/or fungal sepsis. The Mantel-Haenszel method with random-effects model was used to calculate pooled relative risks (RRs) and 95% confidence intervals (CIs).Twenty-seven trials were included in our review, and 25 trials involving 6104 preterm neonates were statistically analyzed. Pooled analysis indicated that enteral probiotic supplementation significantly reduced the risk of any sepsis (25 RCTs; RR 0.83, 95% CI 0.73-0.94; Iâ=â26%), bacterial sepsis (11 RCTs; RR 0.82, 95% CI 0.71-0.95; Iâ=â0%), and fungal sepsis (6 RCTs; RR 0.57, 95% CI 0.41-0.78; Iâ=â0%). This beneficial effect remains in very low birth weight infants (<1500âg) (19 RCTs; RR 0.86, 95% CI 0.75-0.97; Iâ=â18%), but not in extremely low birth weight infants (<1000âg) (3 RCTs; RR 0.73, 95% CI 0.45-1.19; Iâ=â53%). All the included trials reported no systemic infection caused by the supplemental probiotic organisms.Current evidence indicates that probiotic supplementation is safe, and effective in reducing the risk of LOS in preterm neonates in neonatal intensive care units. Further studies are needed to address the optimal probiotic organism, dosing, timing, and duration. High-quality and adequately powered RCTs regarding the efficacy and safety of the use of probiotics in extremely low birth weight infants are still warranted.
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Recém-Nascido Prematuro , Probióticos/uso terapêutico , Sepse/prevenção & controle , Suplementos Nutricionais , Humanos , Recém-Nascido , Unidades de Terapia Intensiva Neonatal , Medição de RiscoRESUMO
Most studies investigated probiotics on food hypersensitivity, not on oral food challenge confirmed food allergy in children. The authors systematically reviewed the literature to investigate whether probiotic supplementation prenatally and/or postnatally could reduce the risk of atopy and food hypersensitivity in young children.PubMed, Embase, the Cochrane Central Register of Controlled Trials, and 4 main Chinese literature databases (Wan Fang, VIP, China National Knowledge Infrastructure, and SinoMed) were searched for randomized controlled trials regarding the effect of probiotics on the prevention of allergy in children. The last search was conducted on July 11, 2015.Seventeen trials involving 2947 infants were included. The first follow-up studies were analyzed. Pooled analysis indicated that probiotics administered prenatally and postnatally could reduce the risk of atopy (relative risk [RR] 0.78; 95% confidence interval [CI] 0.66-0.92; Iâ=â0%), especially when administered prenatally to pregnant mother and postnatally to child (RR 0.71; 95% CI 0.57-0.89; Iâ=â0%), and the risk of food hypersensitivity (RR 0.77; 95% CI 0.61-0.98; Iâ=â0%). When probiotics were administered either only prenatally or only postnatally, no effects of probiotics on atopy and food hypersensitivity were observed.Probiotics administered prenatally and postnatally appears to be a feasible way to prevent atopy and food hypersensitivity in young children. The long-term effects of probiotics, however, remain to be defined in the follow-up of existing trials. Still, studies on probiotics and confirmed food allergy, rather than surrogate measure of food hypersensitivity, are warranted.
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Hipersensibilidade Alimentar/prevenção & controle , Hipersensibilidade/prevenção & controle , Probióticos/uso terapêutico , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Gravidez , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
OBJECTIVE: Infection with clarithromycin-resistant Helicobacter pylori (Hp) is often predictive of treatment failure. Susceptibility testing for Hp could guide therapy of Hp infections. However, agar dilution approved by the Clinical and Laboratory Standards Institute (CLSI) to test for antimicrobial susceptibility of Hp is time consuming (results are often not available in a week or more). So a more expeditious method is necessary. The purpose of this study was to evaluate polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) test performed directly on gastric biopsy specimen from children to detect 23S rRNA mutations (A2143G and A2144G) indicating clarithromycin resistance. METHODS: All biopsy specimens were derived from patients presenting with upper gastrointestinal symptoms, submitted to endoscopy in the Affiliated Children's Hospital, Zhejiang University School of Medicine from September 2006 to February 2007. No patients had undergone eradication therapy. Thirty-nine samples randomly selected from positive specimens by rapid urease test, were homogenized in 500 microl brucella broth with 30% glycerol. The 200 microl homogenized fluid was used to purify genomic DNA with the kit according to the instructions provided by manufacturer, and the rest was used to isolate Hp strains by culturing. All the Hp isolates were tested for clarithromycin susceptibility with the agar dilution and classified as resistant if the minimum inhibitory concentrations (MIC) exceeded 1 microg/ml. Simultaneously, PCR-RFLP analysis was performed in order to identify 23S rRNA mutations (A2143G and A2144G). Finally, the two methods were compared by statistics. The agar dilution was used as a standard to determine the sensitivity and specificity of the PCR-RFLP assay. RESULTS: Of the 39 samples, agar dilution and PCR-RFLP method respectively detected 13 (33.3%) and 14 (35.9%) clarithromycin-resistant gastric specimens. The sensitivity and specificity of PCR-RFLP for the detection of Hp in biopsy specimens were both 92%. The positive and negative predictive value was 85.7% and 96% respectively. No statistically significant difference was found between the two methods (chi2=0.06, P>0.05). The rate of Hp resistance to clarithromycin significantly increased compared with a previous report from the authors' hospital in 2004 (chi2=6.20, P<0.05). CONCLUSIONS: Rising clarithromycin resistance rates were observed in children who visited the authors' hospital. PCR-RFLP test is reliable and rapid for detection of clarithromycin resistance directly on gastric biopsy specimen from children and may help choose appropriate antibiotic in Hp eradication therapy.
Assuntos
Claritromicina/farmacologia , Farmacorresistência Bacteriana , Mucosa Gástrica/microbiologia , Helicobacter pylori/efeitos dos fármacos , Helicobacter pylori/genética , Criança , Infecções por Helicobacter/tratamento farmacológico , Helicobacter pylori/isolamento & purificação , Humanos , Testes de Sensibilidade Microbiana , Reação em Cadeia da Polimerase , Polimorfismo de Fragmento de Restrição , Sensibilidade e EspecificidadeRESUMO
OBJECTIVE: Duodenogastric reflux (DGR) is a reverse flow of duodenal juice into stomach through pylorus composed of bile acid, pancreatic secretion, and intestinal secretion. The increased entero-gastric reflux results in mucosal injury that may relate not only to reflux gastritis but also esophagitis, gastric ulcers, carcinoma of stomach and esophagus. However, the exact mechanisms of gastric mucosal damage caused by DGR are still unknown. The objective of the present study is to investigate the pathogenic effect of primary DGR on gastric mucosa in children, and to explore the correlation of DGR with clinical symptoms, Hp infection and intragastric acidity. METHOD: Totally 81 patients with upper gastrointestinal manifestations were enrolled and they were graded according to the symptom scores and underwent endoscopic, histological examinations and 24-hour intra-gastric bilirubin was monitored with Bilitec 2000. Of the 81 cases, 51 underwent the 24-hour intra-gastric pH monitoring by ambulatory pH recorder simultaneously. The total fraction time of bile reflux was considered as a marker to evaluate the severity of DGR. The total fraction time of bile reflux was compared between the patients with positive and negative results under endoscopy and histologically, respectively. The correlations of the total fraction time of bile reflux with clinical symptom score, Hp infection, intragastric acidity were analyzed respectively. RESULT: The total fraction time of bile reflux in the patients with hyperemia and yellow stain gastric antral mucosa under endoscopy was significantly higher than that without those changes [17.1% (0.5% approximately 53.2%) vs. 6.5% (0 approximately 58.6%), Z = -1.980, P < 0.05; 19.8% (0.5% approximately 58.6%) vs. 8.8% (0 approximately 38.0%), Z = -2.956, P < 0.01 respectively]. Histologically, the cases with intestinal metaplasia had significantly higher total fraction time of bile reflux than in the cases without intestinal metaplasia [29.0% (1.9% approximately 58.6%) vs. 14.3% (0 approximately 53.7%), Z = -2.026, P < 0.05], but no significant difference was found either between the cases with and without chronic inflammation (P > 0.05) or between the cases with and without active inflammation (P > 0.05). The severity of bile reflux was positively correlated with the score of abdominal distention (r = 0.258, P < 0.05), but no correlation with either the severity of intragastric acid (r = -0.124, P > 0.05), or Hp infection (r = 0.016, P > 0.05) was found. CONCLUSION: Primary DGR could cause gastric mucosal lesions manifested mainly as hyperemia and bile-stained gastric antral mucosa under endoscopy and the gastric antral intestinal metaplasia histologically in children. There was no significant correlation between DGR and gastric mucosal inflammatory infiltration. DGR had no relevance to Hp infection and intragastric acidity. We conclude that DGR is probably an independent etiological factor and might play a synergistic role in the pathogenesis of gastric mucosal lesions along with gastric acid and Hp infection.
Assuntos
Refluxo Duodenogástrico/patologia , Mucosa Gástrica/patologia , Adolescente , Refluxo Biliar/patologia , Refluxo Biliar/fisiopatologia , Criança , Pré-Escolar , Refluxo Duodenogástrico/microbiologia , Refluxo Duodenogástrico/fisiopatologia , Feminino , Mucosa Gástrica/microbiologia , Infecções por Helicobacter , Helicobacter pylori , Humanos , Concentração de Íons de Hidrogênio , MasculinoRESUMO
OBJECTIVE: Many clinical studies indicated that Helicobacter pylori (Hp) strains rarely acquired resistance to amoxicillin but easily to clarithromycin and metronidazole. However, it was unclear whether the antibiotic resistance of Hp strains was induced or passively selected during long-term or frequent treatment with metronidazole, clarithromycin and amoxicillin. To compare the propensity of acquired resistance to antibiotics, Hp strains were exposed to amoxicillin, clarithromycin and metronidazole in vitro in this study. METHODS: All Hp strains were clinical isolates, derived from biopsy specimens of patients taken during endoscopy in the Affiliated Children's Hospital, Zhejiang University School of Medicine from December 2004 to July 2005. To seek susceptible strains, the minimum inhibitory concentrations (MICs) of the three antibiotics were determined by using Epsilometer test (E-test) method. In vitro induction was carried out on serially doubling concentrations of antibiotics incorporated into agar. Isolates were also transferred at least three times on antimicrobial agent-free medium, followed by a redetermination of the final MICs to assess the stability of the selected resistance. RESULTS: 7 strains were exposed to antibiotics in vitro. After 6 - 17 passages on antibiotic plates, 7 and 3 strains respectively acquired resistance to metronidazole and clarithromycin, while none of the strains were resistant to amoxicillin. The inductive folds were different among three groups: 8 - 128 folds in metronidazole group; 1 - 256 folds in clarithromycin group; 2 - 16 folds in amoxicillin group. After three transfers on antimicrobial agent-free medium, the MICs decreased significantly in amoxicillin group (P < 0.05) but had no change in metronidazole group and clarithromycin group (P > 0.05). CONCLUSIONS: The metronidazole resistance in Hp was easily selected. Strains resistant to clarithromycin could be selected, but the amoxicillin resistance could not be selected after in vitro induction for Hp isolated from children. The correlation between in vitro and in vivo outcomes suggests that acquired resistance was the main cause for the resistance in Hp strains. The laboratory results of in vitro antibiotic induction could help predict the actual rate of resistance and select appropriate antibiotics for treatment.