Effect of helicobacter pylori eradication therapy on small intestinal bacterial overgrowth in children / 中国综合临床

Objective:To investigate the effect of helicobacter pylori (HP) infection and eradication treatment on small intestinal bacterial overgrowth (SIBO) in children.Methods:A prospective case-control study was conducted to select 68 children with symptoms of abdominal distension, abdominal pain, diarrhea and suspected digestive system diseases admitted to the Affiliated Hospital of Xuzhou Medical University from June 2021 to June 2022. They were divided into HP negative group and HP positive group according to HP infection. HP positive group received triple standardized HP eradication treatment, 14 days as a course of treatment. The baseline SIBO positive rate and gastrointestinal symptom rating scale (GSRS) score of the two groups were compared. The HP positive group was followed up for 4 and 12 weeks after drug withdrawal for quantitative assessment of gastrointestinal symptoms and LHBT. The SIBO positive rate, GSRS score of the two groups and the change of SIBO positive rate and GSRS score of the HP positive group before and after treatment were compared. The measurement data with normal distribution were expressed, and independent sample t-test was used for comparison between the two groups. M( Q1, Q3) was used to represent the measurement data of non normal distribution, and Mann Whitney U test was used to compare the two groups; Friedman test was used for comparison between multiple time points, and Nemenyi test was used for pairwise comparison. Four grid table or paired χ 2 test was used to compare the counting data between groups. Results:The positive rate of SIBO in HP negative group was lower than that in HP positive group (36.1% (13/36) vs 62.5% (20/32)), the difference was statistically significant (χ 2=4.72, P=0.030). Four weeks after drug withdrawal, the SIBO positive rate in HP positive group was higher than that before treatment (87.5% (28/32) vs 62.5% (20/32)), and 12 weeks after drug withdrawal was lower than that before treatment (21.9% (7/32) vs 62.5% (20/32)), with statistically significant differences (χ 2=8.00, P=0.008; χ 2=13.00, P<0.001). There was no statistically significant difference in GSRS score between HP negative group and HP positive group ( P=0.098). The clinical symptoms of 32 children in HP positive group were improved 4 and 12 weeks after HP eradication was stopped. GSRS scores were lower than those before treatment (8.0 (6.0, 12.8), 7.0 (5.0, 9.0) points vs 15.0 (12.0, 19.0) points) , and the differences were statistically significant ( Z values were -3.91, -4.68, respectively; all P<0.001). Conclusions:HP infection can increase the positive rate of SIBO in children with suspected digestive system diseases. The standardized triple HP eradication therapy may further aggravate the overgrowth of intestinal bacteria while treating HP infection, but this effect can be eliminated after 12 weeks of treatment.

Association between milk consumption and lactose malabsorption in Indonesian children / 中国当代儿科杂志

OBJECTIVES@#To study the association between milk consumption and lactose malabsorption in Indonesian children aged 3-12 years.@*METHODS@#This cross sectional study was conducted in randomly selected presumed healthy children with good nutritional status aged 3-12 years in Central Jakarta, Indonesia (@*RESULTS@#The prevalence of lactose malabsorption in children aged 3-5 years and children aged 6-12 years was 20.8% (15/72) and 35.3% (36/102), respectively. There was no association between milk or milk product consumption and lactose malabsorption (@*CONCLUSIONS@#There is no association between milk consumption and lactose malabsorption in Indonesian children aged 3-12 years, suggesting that genetic predisposition may be more important than adaptive mechanisms to lactose consumption.

Obesity Is Inversely Related to Hydrogen-Producing Small Intestinal Bacterial Overgrowth in Non-Constipation Irritable Bowel Syndrome

There have been inconsistent findings on the association of obesity and non-constipation irritable bowel syndrome (IBS). Small intestinal bacterial overgrowth (SIBO) with hydrogen (H₂) gas forming-microflora causes non-constipation IBS. But, the effect of H₂ producing SIBO on obesity in non-constipation IBS patients has not been studied yet. The aim of this study was to investigate the association between obesity and SIBO in non-constipation IBS patients. We reviewed the charts of patients who showed IBS symptoms along with the documented results of their lactulose hydrogen breath test (LHBT) for SIBO. Multivariate models were used to assess the association between obesity and SIBO. Four-hundred fifty-eight patients were retrospectively included in the study. Of the 485 IBS patients, 158 (30.7%) subjects had positive results for LHBT. Subjects without SIBO showed significantly higher levels of body mass index (24.8 vs. 23.3; P < 0.001) and waist circumference (86.5 vs. 82.7; P < 0.001) as compared to subjects with SIBO. In multivariate analysis, the odds ratios of SIBO were 0.396 (P = 0.018) for obesity and 0.482 (P = 0.021) for abdominal obesity. This is the first human study to demonstrate that obesity is inversely related to SIBO with H2 gas production in non-constipation IBS patients.

A study on the role of small intestinal bacterial overgrowth in patients with functional dyspepsia

Background: Functional dyspepsia (FD) accounts for majority of dyspepsia. Before labeling them as FD, a bunch of investigations to be done to rule out organic cause. Small intestinal bacterial overgrowth (SIBO) which is one of the cause for dyspepsia is not commonly sought and always neglected among physicians. So we aimed to study the frequency of SIBO in patients with dyspeptic symptoms and whether to include investigations to diagnose SIBO in the algorithm of approach to dyspepsia. Materials and methods: We consecutively enrolled 50 newly diagnosed functional dyspepsia patients based on Rome III criteria and 50 healthy controls in this study. They underwent glucose hydrogen breath test (GHBT) after overnight fasting. Results: In the cases with FD, 6 (12%) subjects were found to have positive GHBT and diagnosed as SIBO, whereas in the controls 2 (4%) had positive GHBT with no statistical significant difference among groups with a P value of 0.140. In the cases with FD, the most common subtype was post prandial distress syndrome (46%), followed by epigastric pain syndrome (36%) and mixed type Sabarinathan Ramanathan, Premkumar Karunakaran, Kani Shaikh Mohamed, Ratnakar Kini, Pugazhendhi Thangavel, Murali Ananthavadivelu, Mohammed Ali, Rabindranath Eswaran, Thinakar Mani, Chandrashekar Patil. A study on the role of small intestinal bacterial overgrowth in patients with functional dyspepsia. IAIM, 2017; 4(5): 88-97. Page 89 (18%). Patients with SIBO were treated with rifaximin 1200 mg/day in divided doses for 10 days. GHBT was repeated after 4 weeks and found to be normalized in all cases. Conclusion: SIBO should be considered before making a diagnosis of FD. GHBT is a simple noninvasive method to diagnose SIBO. One could avoid taking unnecessary drugs by timely diagnosis of SIBO in patients with dyspepsia.

The dietary features of diarrhea predominant irritable bowel syndrome patients with small intestinal bowel overgrowth / 中华内科杂志

Objective To explore the diet features of diarrhea predominant irritable bowel syndrome (IBS-D) with small intestinal bacterial overgrowth (SIBO).Methods IBS-D patients were enrolled in outpatient department of Peking University Third Hospital from March 2015 to April 2016.Healthy volunteers were recruited as controls (HC).All the subjects completed screening examinations,clinical and food investigation,and lactulose methane and hydrogen breath test (LMHBT).The high fat diet is defined as the daily total calories supplying from fat is more than 50％.Results Eighty-eight IBS-D patients and 32 HC were finally enrolled.The positive rate of LMHBT in IBS-D was significantly higher than that of HC [39.8％ (35/88) vs 12.5％ (4/28),P=0.005].The 28 HC with negative LMHBT were enrolled in the follow-up analysis.(1) The BMI of IBS-P (IBS-D with positive LMHBT) was significantly lower than IBS-N (IBS-D with negative LMHBT) [(21.57 ±0.54) vs (23.30 ±0.53) kg/m2,P=0.032].IBS-D patients with SIBO had higher scores of abdominal pain assess.(2) The proportion of dietary protein and carbohydrate in IBS-D was significantly higher than that of HC (14.39％ vs 12.22％,P =0.001;53.94％ vs 46.25％,P =0.003,respectively).The proportion of diet fat was significantly higher in IBS-P than IBS-N[(47.19 ± 2.62) ％ vs (40.74 ± 1.66) ％,P =0.038].(3) The baseline of breath methane in IBS-P was significantly higher than that of in IBS-N [(8.69 ± 0.39) × 10-6 vs (6.39 ± 0.47) × 10-6,P =0.002].IBS-D patients with high fat diet had higher LMHBT positive rate than that of non-high fat diet patients[54.2％ (13/24) vs 17.2％ (11/64),P =0.001].Breath methane peak value was positively correlated with the fat proportion of diet (r =0.413,P =0.022).Conclusions About 39.8％ IBS-D patients diagnosed by Rome 11Ⅲ are combined with SIBO.SIBO may affect IBS-D patients' nutritional status.High fat diet might be one of the risk factors for IBS-D with SIBO.Proper diet structure might reduce the prevalence of IBS-D,especially for IBS-D with SIBO.

Irritable Bowel Syndrome, Particularly the Constipation-Predominant Form, Involves an Increase in Methanobrevibacter smithii, Which Is Associated with Higher Methane Production

BACKGROUND/AIMS: Because Methanobrevibacter smithii produces methane, delaying gut transit, we evaluated M. smithii loads in irritable bowel syndrome (IBS) patients and healthy controls (HC). METHODS: Quantitative real-time polymerase chain reaction for M. smithii was performed on the feces of 47 IBS patients (Rome III) and 30 HC. On the lactulose hydrogen breath test (LHBT, done for 25 IBS patients), a fasting methane result ≥10 ppm using 10 g of lactulose defined methane-producers. RESULTS: Of 47, 20 had constipation (IBS-C), 20 had diarrhea (IBS-D) and seven were not sub-typed. The M. smithii copy number was higher among IBS patients than HC (Log₁₀5.4, interquartile range [IQR; 3.2 to 6.3] vs 1.9 [0.0 to 3.4], p<0.001), particularly among IBS-C compared to IBS-D patients (Log₁₀6.1 [5.5 to 6.6] vs 3.4 [0.6 to 5.7], p=0.001); the copy number negatively correlated with the stool frequency (R=−0.420, p=0.003). The M. smithii copy number was higher among methane-producers than nonproducers (Log₁₀6.4, IQR [5.7 to 7.4] vs 4.1 [1.8 to 5.8], p=0.001). Using a receiver operating characteristic curve, the best cutoff for M. smithii among methane producers was Log₁₀6.0 (sensitivity, 64%; specificity, 86%; area under curve [AUC], 0.896). The AUC for breath methane correlated with the M. smithii copy number among methane producers (r=0.74, p=0.008). Abdominal bloating was more common among methane producers (n=9/11 [82%] vs 5/14 [36%], p=0.021). CONCLUSIONS: Patients with IBS, particularly IBS-C, had higher copy numbers of M. smithii than HC. On LHBT, breath methane levels correlated with M. smithii loads.

Irritable Bowel Syndrome, Particularly the Constipation-Predominant Form, Involves an Increase in Methanobrevibacter smithii, Which Is Associated with Higher Methane Production

BACKGROUND/AIMS: Because Methanobrevibacter smithii produces methane, delaying gut transit, we evaluated M. smithii loads in irritable bowel syndrome (IBS) patients and healthy controls (HC). METHODS: Quantitative real-time polymerase chain reaction for M. smithii was performed on the feces of 47 IBS patients (Rome III) and 30 HC. On the lactulose hydrogen breath test (LHBT, done for 25 IBS patients), a fasting methane result ≥10 ppm using 10 g of lactulose defined methane-producers. RESULTS: Of 47, 20 had constipation (IBS-C), 20 had diarrhea (IBS-D) and seven were not sub-typed. The M. smithii copy number was higher among IBS patients than HC (Log₁₀5.4, interquartile range [IQR; 3.2 to 6.3] vs 1.9 [0.0 to 3.4], p<0.001), particularly among IBS-C compared to IBS-D patients (Log₁₀6.1 [5.5 to 6.6] vs 3.4 [0.6 to 5.7], p=0.001); the copy number negatively correlated with the stool frequency (R=−0.420, p=0.003). The M. smithii copy number was higher among methane-producers than nonproducers (Log₁₀6.4, IQR [5.7 to 7.4] vs 4.1 [1.8 to 5.8], p=0.001). Using a receiver operating characteristic curve, the best cutoff for M. smithii among methane producers was Log₁₀6.0 (sensitivity, 64%; specificity, 86%; area under curve [AUC], 0.896). The AUC for breath methane correlated with the M. smithii copy number among methane producers (r=0.74, p=0.008). Abdominal bloating was more common among methane producers (n=9/11 [82%] vs 5/14 [36%], p=0.021). CONCLUSIONS: Patients with IBS, particularly IBS-C, had higher copy numbers of M. smithii than HC. On LHBT, breath methane levels correlated with M. smithii loads.

Evaluating the efficacy of probiotic on treatment in patients with small intestinal bacterial overgrowth (SIBO) - A pilot study.

Background & objectives: Small intestinal bacterial overgrowth (SIBO) leads to several gastrointestinal (GI) problems and complications leading to malabsorption. The effectiveness of probiotics in the treatment of SIBO syndrome has not been well studied. this pilot study was aimed to assess the efficacy of a probiotic consisting of lactobacilli in the treatment of SIBO. Methods: In this study, 30 cases suffering from chronic abdominal pain or diarrhoea and with a positive hydrogen breath test were randomized in a double-blind manner into two groups: probiotic drug user and control group. After an initial 3-week aggressive therapy with broad-spectrum antibiotics, a 15-day maintenance antibiotic therapy with lactol was administered for the study group and the same regimen without lactol for the control group. After six months the HBT result and the GI symptoms were analyzed and compared between the two groups. Results: the result of hydrogen breath test and the clinical symptoms in patients receiving the maintenance regimen with lactol probiotic showed a better response. The hydrogen breath test turned negative in 93.3 per cent of those receiving lactol compared to 66.7 per cent of the controls. In all the cases receiving lactol, the abdominal pain disappeared completely (p=0.002). In addition, other GI problems including flatulence, belching and diarrhoea significantly improved in the study group (p<0.05). Interpretation & conclusions: Based on the preliminary data it seems that adding lactol probiotic to the maintenance therapy of small intestinal bacterial overgrowth patients on routine antibiotic therapy will be beneficial in preventing the complications of this syndrome.

Um ensaio randomizado duplo-cego e controlado por placebo com probióticos em casos de supercrescimento bacteriano no intestino delgado em crianças tratadas com omeprazol / A double-blind placebo-controlled randomized trial on probiotics in small bowel bacterial overgrowth in children treated with omeprazole

OBJETIVO: Avaliar a incidência de SBID em crianças tratadas com omeprazol e testar se os probióticos influenciam essa incidência. MÉTODOS: Um ensaio duplo-cego controlado por placebo foi realizado em 70 crianças tratadas oralmente, durante 4 semanas, com 20 mg de omeprazol por dia. Desses, 36 indivíduos receberam diária e simultaneamente Lactobacillus rhamnosus R0011 (1,9 x 10(9) cfu) e Lactobacillus acidophillus R0052 (0,1 x 10(9) cfu) (grupo probiótico), enquanto 34 receberam placebo (grupo placebo). O diagnóstico de SBID teve como base o desenvolvimento de sintomas sugestivos em combinação com um teste respiratório com glicose positivo. RESULTADOS: Após um mês de tratamento com IBP, 30% (21/70) apresentaram um teste respiratório positivo sugerindo SBID; desses, 62% foram sintomáticos. Cinco crianças desenvolveram sintomas parecidos com os de SBID, mas apresentaram um teste respiratório negativo; 44 (63%) não apresentavam sintomas e tiveram teste respiratório negativo. Não houve diferença na incidência de testes respiratórios positivos no grupo probiótico em comparação ao grupo placebo (33% em comparação a 26,5%; p: 0,13). CONCLUSÕES: Como houve sintomas sugestivos de SBID em 26% das crianças tratadas com IBP e o teste respiratório com glicose deu resultados anormais em 72% delas, esse efeito colateral deve ser levado em consideração com mais frequência. O probiótico testado não reduziu o risco de desenvolver SBID.

OBJECTIVE:To evaluate the incidence of small bowel bacterial overgrowth (SBBO) in children treated with omeprazole, and to test whether probiotics influence the incidence. METHODS: A double-blinded, placebo-controlled trial was performed in 70 children treated orally during four weeks with 20 mg omeprazole per day. Lactobacillus rhamnosus R0011 (1.9 x 10(9) cfu) and Lactobacillus acidophillus R0052 (0.1 x 10(9) cfu) were simultaneously given daily to 36 subjects (probiotic group), while 34 subjects received placebo (placebo group). The diagnosis of SBBO was based on the development of suggestive symptoms, in combination with a positive glucose breath test. RESULTS: After one month of proton pump inhibitor (PPI) treatment, 30% (21/70) had a positive breath test suggesting SBBO; of these 62% were symptomatic. Five children developed SBBO-like symptoms, but had a negative breath test; and 44 (63%) were symptom free and had a negative breath test. There was no difference in the incidence of positive breath tests in the probiotic versus the placebo group (33% vs 26.5%; p = 0.13). CONCLUSIONS: Since symptoms suggesting SBBO developed in 26% of PPI-treated children, and since the glucose breath test was abnormal in 72% of these, this side-effect should be more frequently considered. The probiotic tested did not decrease the risk to develop SBBO.

La prolongación del test de hidrógeno en aire espirado mejora la sensibilidad del diagnóstico de malabsorción de lactosa / Extension of hydrogen breath test improves sensibility of lactose malabsorption diagnosis

Hydrogen breath test (HBT) for diagnosis of lactose malabsorption (LM), is usually performed over a 180 min standard period. However, studies have suggested that extending the observation time, the sensibility of the test is improved. Aims: To determine if the time extension of the lactose hydrogen breath test, can improve sensibility of the test. Patients and method: One thousand and two hundred and ninety three patients were included, mean age 33.1 years (range: 3-90 years), 73.3 percent women, 26.8 percent were younger than 15years. Lactose HBT was performed for a standard period, which was prolonged to 240 min when patients presented a flat curve at 180 min. Results: Seven hundred and thirty one patients (56.5 percent) had a positive breath test for LM during 180 min. The extension of the HBT to 240 min showed an increase of 13.3 percent (p < 0.05) of patients with LM diagnosis. Conclusion: This study shows that an additional hour increases sensibility of the test, and decreases the false negative results.

El test de hidrógeno en aire espirado (TH2) para el diagnóstico de malabsorción de lactosa (ML) se realiza por un período estándar de 180 min. Sin embargo, se ha sugerido que estudios de mayor duración podrían mejorar la sensibilidad del test. Objetivos: Determinar si la prolongación del TH2 con lactosa, puede mejorar la sensibilidad del diagnóstico de ML. Pacientes y Métodos: Se estudiaron 1293pacientes, edad promedio 33,1 años (rango 3 a 90 años), 73.3 por ciento mujeres, 26,8 por ciento menores de15 años. Para determinar la presencia de ML se realizó el TH2 con lactosa estándar, extendiéndolo a 240 min en pacientes con una curva plana a los 180 min. Resultados: Setecientos treinta y un pacientes (56,5 por ciento) tuvieron un TH2 concordante con ML durante el período de 180 min. En aquellos que se extendió el examen a 240 min se observó un aumento de 13,3 por ciento de ML (p< 0,05). Conclusión: Este estudio demuestra que la prolongación del TH2 en una hora mejora la sensibilidad del examen y disminuye el número de falsos negativos.

Estudio comparativo de dos equipos para el test de H2 en aire espirado / Evaluation of breath H2 measured by means of two different analyzers

El test de hidrógeno (H2) en aire espirado es ampliamente utilizado en el estudio de malabsorción de hidratos de carbono, sobrecrecimiento bacteriano intestinal (SBI) y tiempo de tránsito orocecal (TTOC). Objetivo: Comparar los resultados obtenidos por dos equiposde detección de H2, uno de ellos de introducción reciente en nuestro medio. Material y Métodos: 50 pacientes, edad promedio 38,5 +/- 5,2 años (rango 7-77 años), 40 mujeres, se les realizó el test de H2 en aire espirado en paralelo con ambos equipos bajo métodos estandarizados. En 25 de ellos se investigó la presencia de malabsorción de lactosa, y en los otros 25, la presencia de SBI con lactulosa. Se evaluaron los valores de H2 obtenidos con ambos equipos. Resultados: Las lecturas de H2 con ambos equipos no mostraron diferencias significativas tanto para lactosa (p > 0,1), como para lactulosa (p > 0,5). Tampoco hubo diferencias en el TTOC de los pacientes (90 +/- 33,75 min v/s 90.8 +/- 32,42 min) (p > 1). Se obtuvo un índice de concordancia Kappa de 0,92 entre ambos equipos con el test con lactosa y con lactulosa. Conclusión: El equipo portátil es altamente confiable, entregando resultados con una excelente concordancia con respectoal equipo de referencia.

The hydrogen (H2) breath test (BT) is widely used to investigate carbohydrates malabsorption, small intestinal bacterial overgrowth (SIBO) and orocaecal transit time (OTT). Aim: To compare the results of two hydrogen breath devices, one of them, of recent introduction in our country. Methods: Fifty patients were included, mean age 38.5 +/- 5.2years (range 7-77 yrs), 40 women, H2 BT was performed in parallel with both analyzers under standardized methods. Lactose malabsorption was investigated in 25 patients with lactose, and the presence of SIBO in the resting 25 patients, with lactulose, hydrogen values obtained with both devices were evaluated. Results: No differences were observed between the H2 concentrations for lactose BT (p > 0.1) as well as lactulose BT (p > 0.5)and also between the OTT measured by the two devices (90 +/- 33.75 min. v/s 90.8 +/- 32.42 min) (p > 1). We detected a Kappa concordance index of 0.92 for both equipments. Conclusion: The portable device is highly reliable to detect the presence of breath hydrogen, giving results with an excellent concordance to the reference device.

Correlation between lactose absorption and the C/T-13910 and G/A-22018 mutations of the lactase-phlorizin hydrolase (LCT) gene in adult-type hypolactasia

The C/T-13910 mutation is the major factor responsible for the persistence of the lactase-phlorizin hydrolase (LCT) gene expression. Mutation G/A-22018 appears to be only in co-segregation with C/T-13910. The objective of the present study was to assess the presence of these two mutations in Brazilian individuals with and without lactose malabsorption diagnosed by the hydrogen breath test (HBT). Ten milk-tolerant and 10 milk-intolerant individuals underwent the HBT after oral ingestion of 50 g lactose (equivalent to 1 L of milk). Analyses for C/T-13910 and G/A-22018 mutations were performed using a PCR-based method. Primers were designed for this study based on the GenBank sequence. The CT/GA, CT/AA, and TT/AA genotypes (lactase persistence) were found in 10 individuals with negative HBT. The CC/GG genotype (lactase non-persistence) was found in 10 individuals, 9 of them with positive HBT results. There was a significant agreement between the presence of mutations in the LCT gene promoter and HBT results (kappa = -0.9, P < 0.001). The CT/AA genotype has not been described previously and seems to be related to lactase persistence. The present study showed a significant agreement between the occurrence of mutations G/A-22018 and C/T-13910 and lactose absorption in Brazilian subjects, suggesting that the molecular test used here could be proposed for the laboratory diagnosis of adult-type primary hypolactasia.

Effect of Radix Astragali on the Transmission Small Intestine in Health Subjects / 中药新药与临床药理

Objective: To observe the effect of Radix Astragali on the transmission time of small intestine(TTSI).Methods: TTSI and the peak value of lactose absorption were determined by hydrogen breath test in 40 healthy subjects a week before and after administration of Radix Astragali. Results: TTSI was 116.48+ 24.57 min and 102.38+ 13.44 min respectively before and after administration (P 0.05).Conclusion: Oral administration of Radix Astragali for one week has no effect on the absorption of the lactose by small intestine,but can promote the movement of small intestine.