Displaying publications 1 - 20 of 42 in total

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  1. Li J, Fong DYT, Lok KYW, Wong JYH, Man Ho M, Choi EPH, et al.
    J Glob Health, 2024 Apr 12;14:04068.
    PMID: 38606605 DOI: 10.7189/jogh-14-04068
    BACKGROUND: Central and bridge nodes can drive significant overall improvements within their respective networks. We aimed to identify them in 16 prevalent chronic diseases during the coronavirus disease 2019 (COVID-19) pandemic to guide effective intervention strategies and appropriate resource allocation for most significant holistic lifestyle and health improvements.

    METHODS: We surveyed 16 512 adults from July 2020 to August 2021 in 30 territories. Participants self-reported their medical histories and the perceived impact of COVID-19 on 18 lifestyle factors and 13 health outcomes. For each disease subgroup, we generated lifestyle, health outcome, and bridge networks. Variables with the highest centrality indices in each were identified central or bridge. We validated these networks using nonparametric and case-dropping subset bootstrapping and confirmed central and bridge variables' significantly higher indices through a centrality difference test.

    FINDINGS: Among the 48 networks, 44 were validated (all correlation-stability coefficients >0.25). Six central lifestyle factors were identified: less consumption of snacks (for the chronic disease: anxiety), less sugary drinks (cancer, gastric ulcer, hypertension, insomnia, and pre-diabetes), less smoking tobacco (chronic obstructive pulmonary disease), frequency of exercise (depression and fatty liver disease), duration of exercise (irritable bowel syndrome), and overall amount of exercise (autoimmune disease, diabetes, eczema, heart attack, and high cholesterol). Two central health outcomes emerged: less emotional distress (chronic obstructive pulmonary disease, eczema, fatty liver disease, gastric ulcer, heart attack, high cholesterol, hypertension, insomnia, and pre-diabetes) and quality of life (anxiety, autoimmune disease, cancer, depression, diabetes, and irritable bowel syndrome). Four bridge lifestyles were identified: consumption of fruits and vegetables (diabetes, high cholesterol, hypertension, and insomnia), less duration of sitting (eczema, fatty liver disease, and heart attack), frequency of exercise (autoimmune disease, depression, and heart attack), and overall amount of exercise (anxiety, gastric ulcer, and insomnia). The centrality difference test showed the central and bridge variables had significantly higher centrality indices than others in their networks (P 

    Matched MeSH terms: Irritable Bowel Syndrome*
  2. Chong PP, Chin VK, Looi CY, Wong WF, Madhavan P, Yong VC
    Front Microbiol, 2019;10:1136.
    PMID: 31244784 DOI: 10.3389/fmicb.2019.01136
    Irritable bowel syndrome (IBS) is a functional disorder which affects a large proportion of the population globally. The precise etiology of IBS is still unknown, although consensus understanding proposes IBS to be of multifactorial origin with yet undefined subtypes. Genetic and epigenetic factors, stress-related nervous and endocrine systems, immune dysregulation and the brain-gut axis seem to be contributing factors that predispose individuals to IBS. In addition to food hypersensitivity, toxins and adverse life events, chronic infections and dysbiotic gut microbiota have been suggested to trigger IBS symptoms in tandem with the predisposing factors. This review will summarize the pathophysiology of IBS and the role of gut microbiota in relation to IBS. Current methodologies for microbiome studies in IBS such as genome sequencing, metagenomics, culturomics and animal models will be discussed. The myriad of therapy options such as immunoglobulins (immune-based therapy), probiotics and prebiotics, dietary modifications including FODMAP restriction diet and gluten-free diet, as well as fecal transplantation will be reviewed. Finally this review will highlight future directions in IBS therapy research, including identification of new molecular targets, application of 3-D gut model, gut-on-a-chip and personalized therapy.
    Matched MeSH terms: Irritable Bowel Syndrome
  3. Helvaci MR, Kaya H, Algin MC, Yalcin A
    Med J Malaysia, 2008 Jun;63(2):140-2.
    PMID: 18942301
    When specifically asked, about one third of people report recurrent upper abdominal discomfort, and irritable bowel syndrome (IBS) and chronic gastritis (CG) maybe the most frequently diagnosed ones among all. Consecutive patients with upper abdominal discomfort applying to the Internal Medicine Polyclinic were included into the study. IBS was diagnosed according to Rome II criteria and CG was diagnosed histologically. All cases with IBS were compared with the age and sex-matched randomly selected cases without IBS. One hundred and fifty-six patients with IBS and 179 patients without IBS were studied. CG was detected in 72.4% (113 cases) of cases with IBS, and only 36.3% (65 cases) in patients without IBS (p < 0.001). IBS probably is a cascade of many physiological events, being initiated by infection, inflammation, psychological disturbances-like many stresses and eventually leading to dysfunctions of gut and other systems of the body via a low-grade inflammatory process. CG may be one of the terminating points of the physiological events' cascade, IBS. This may explain the high prevalence of IBS in society. Keeping in mind this association will be helpful during prevention, treatment, and follow up of these common pathologies in Primary Health Centers and Internal Medicine and Gastroenterology Polyclinics for physicians.
    Matched MeSH terms: Irritable Bowel Syndrome/complications; Irritable Bowel Syndrome/physiopathology*
  4. Lee YY, Waid A, Tan HJ, Chua SB, Whitehead WE
    J Gastroenterol Hepatol, 2012 Apr;27(4):746-50.
    PMID: 22004172 DOI: 10.1111/j.1440-1746.2011.06943.x
    The Malay language is widely used within the "Malay Archipelago" particularly in Malaysia, Indonesia, Philippines, Singapore and Brunei with a combined population of 300 million. There are no reliable data on the epidemiology of irritable bowel syndrome (IBS) in the Malay speaking population because the Rome Diagnostic Questionnaire has not been translated and validated for the Malay language. The current study aimed to translate and validate the Rome III IBS Diagnostic Questionnaire, Red Flag and Psychosocial Alarm questionnaires into the Malay language.
    Matched MeSH terms: Irritable Bowel Syndrome/diagnosis*
  5. Lee YY, Waid A, Tan HJ, Chua AS, Whitehead WE
    World J Gastroenterol, 2012 Nov 28;18(44):6475-80; discussion p. 6479.
    PMID: 23197894 DOI: 10.3748/wjg.v18.i44.6475
    To survey irritable bowel syndrome (IBS) using Rome III criteria among Malays from the north-eastern region of Peninsular Malaysia.
    Matched MeSH terms: Irritable Bowel Syndrome/diagnosis*; Irritable Bowel Syndrome/ethnology*; Irritable Bowel Syndrome/psychology
  6. Alt F, Chong PW, Teng E, Uebelhack R
    Phytother Res, 2017 Jul;31(7):1056-1062.
    PMID: 28508427 DOI: 10.1002/ptr.5826
    Irritable bowel syndrome (IBS) is a functional bowel disorder of unknown aetiology. There is currently no known cure, and pharmacological interventions are usually targeting symptomatic relief, where natural and herbal remedies also play a role. This study aimed to evaluate the benefit and tolerability of IQP-CL-101 in symptomatic IBS relief. A double-blinded, randomised, placebo-controlled trial was conducted over 8 weeks. A total of 99 subjects fulfilling ROME-III criteria for IBS were randomised into two groups, given either two IQP-CL-101 softgels or matching placebo twice daily before main meals. The primary endpoint was the difference in change of IBS Symptom Severity Score (IBS-SSS) after an 8-week intake of IQP-CL-101 compared to placebo. After 8 weeks, subjects on IQP-CL-101 showed a significant reduction in IBS-SSS (113.0 ± 64.9-point reduction) compared to subjects on placebo (38.7 ± 64.5-point reduction) (p 
    Matched MeSH terms: Irritable Bowel Syndrome/drug therapy*
  7. Labrooy C, Abdullah TL, Stanslas J
    Data Brief, 2018 Dec;21:1678-1685.
    PMID: 30505900 DOI: 10.1016/j.dib.2018.10.097
    This study compared morphological and molecular data for identification of Kaempferia species. Each species was deposited in Institute of Bioscience (IBS), Universiti Putra Malaysia (UPM) as voucher specimens and ITS sequences of each species deposited in NCBI (https://www.ncbi.nlm.nih.gov/) as GenBank accessions. DNA was extracted using a modified CTAB method and PCR amplification was completed using Internal Transcribed Spacer (ITS4 and ITS5) markers. PCR amplification of products were viewed under gel electrophoresis. Sequencing was performed and sequence characteristics of ITS rDNA in Kaempferia is shown. Qualitative and qualitative scoring of morphological characters and measuring techniques for Kaempferia species are included. In addition, a brief review of molecular markers used in phylogenetic studies of Zingiberaceae is included in this dataset.
    Matched MeSH terms: Irritable Bowel Syndrome
  8. Jalanka J, Gunn D, Singh G, Krishnasamy S, Lingaya M, Crispie F, et al.
    Gut, 2023 Mar;72(3):451-459.
    PMID: 36171082 DOI: 10.1136/gutjnl-2021-326828
    OBJECTIVES: Persistent bowel dysfunction following gastroenteritis (postinfectious (PI)-BD) is well recognised, but the associated changes in microbiota remain unclear. Our aim was to define these changes after gastroenteritis caused by a single organism, Campylobacter jejuni, examining the dynamic changes in the microbiota and the impact of antibiotics.

    DESIGN: A single-centre cohort study of 155 patients infected with Campylobacter jejuni. Features of the initial illness as well as current bowel symptoms and the intestinal microbiota composition were recorded soon after infection (visit 1, <40 days) as well as 40-60 days and >80 days later (visits 2 and 3). Microbiota were assessed using 16S rRNA sequencing.

    RESULTS: PI-BD was found in 22 of the 99 patients who completed the trial. The cases reported significantly looser stools, with more somatic and gastrointestinal symptoms. Microbiota were assessed in 22 cases who had significantly lower diversity and altered microbiota composition compared with the 44 age-matched and sex-matched controls. Moreover 60 days after infection, cases showed a significantly lower abundance of 23 taxa including phylum Firmicutes, particularly in the order Clostridiales and the family Ruminoccocaceae, increased Proteobacteria abundance and increased levels of Fusobacteria and Gammaproteobacteria. The microbiota changes were linked with diet; higher fibre consumption being associated with lower levels of Gammaproteobacteria.

    CONCLUSION: The microbiota of PI-BD patients appeared more disturbed by the initial infection compared with the microbiota of those who recovered. The prebiotic effect of high fibre diets may inhibit some of the disturbances seen in PI-BD.

    TRIAL REGISTRATION NUMBER: NCT02040922.

    Matched MeSH terms: Irritable Bowel Syndrome*
  9. Hutson JM, Hynes MC, Kearsey I, Yik YI, Veysey DM, Tudball CF, et al.
    Pediatr Surg Int, 2020 Jan;36(1):11-19.
    PMID: 31673760 DOI: 10.1007/s00383-019-04587-x
    Children with chronic idiopathic constipation (CIC) often end up at the surgeon when medical treatments have failed. This opinion piece discusses a recently described pattern of CIC called 'Rapid transit constipation (RTC)' first identified in 2011 as part of surgical workup. RTC was identified using a nuclear medicine gastrointestinal transit study (NMGIT or nuclear transit study) to determine the site of slowing within the bowel and to inform surgical treatment. Unexpectedly, we found that RTC occured in 29% of 1000 transit studies in a retrospective audit. Irritable bowel syndrome (IBS) occurs in 7-21% of the population, with a higher prevalence in young children and with constipation type dominating in the young. While 60% improve with time, 40% continue with symptoms. First-line therapy for IBS in adults is a diet low in fermentable oligosaccharides, disaccharides, monosaccharides and polyols which reduces symptoms in > 70% of patients. In children with functional gastrointestinal disorders, fructose intolerance occurs in 35-55%. Reducing fructose produced significant improvement in 77-82% of intolerant patients. In children with RTC and a positive breath test upon fructose challenge, we found that exclusion of fructose significantly improved constipation, abdominal pain, stool consistency and decreased laxative use. We hypothesise that positive breath tests and improvement of pain and bowel frequency with sugar exclusion diets in RTC suggest these children have IBS-C. These observations raise the possibility that many children with CIC could be treated by reducing fructose early in their diet and this might prevent the development of IBS in later life.
    Matched MeSH terms: Irritable Bowel Syndrome/prevention & control*
  10. Quek SXZ, Loo EXL, Demutska A, Chua CE, Kew GS, Wong S, et al.
    J Gastroenterol Hepatol, 2021 Aug;36(8):2187-2197.
    PMID: 33615534 DOI: 10.1111/jgh.15466
    BACKGROUND AND AIM: Gastrointestinal manifestations of the coronavirus disease 2019 (COVID-19) pandemic may mimic irritable bowel syndrome (IBS), and social distancing measures may affect IBS patients negatively. We aimed to study the impact of COVID-19 on respondents with self-reported IBS.

    METHODS: We conducted an anonymized survey from May to June 2020 in 33 countries. Knowledge, attitudes, and practices on personal hygiene and social distancing as well as psychological impact of COVID-19 were assessed. Statistical analysis was performed to determine differences in well-being and compliance to social distancing measures between respondents with and without self-reported IBS. Factors associated with improvement or worsening of IBS symptoms were evaluated.

    RESULTS: Out of 2704 respondents, 2024 (74.9%) did not have IBS, 305 (11.3%) had self-reported IBS, and 374 (13.8%) did not know what IBS was. Self-reported IBS respondents reported significantly worse emotional, social, and psychological well-being compared with non-IBS respondents and were less compliant to social distancing measures (28.2% vs 35.3%, P = 0.029); 61.6% reported no change, 26.6% reported improvement, and 11.8% reported worsening IBS symptoms. Higher proportion of respondents with no change in IBS symptoms were willing to practice social distancing indefinitely versus those who deteriorated (74.9% vs 51.4%, P = 0.016). In multivariate analysis, willingness to continue social distancing for another 2-3 weeks (vs longer period) was significantly associated with higher odds of worsening IBS.

    CONCLUSION: Our study showed that self-reported IBS respondents had worse well-being and compliance to social distancing measures than non-IBS respondents. Future research will focus on occupational stress and dietary changes during COVID-19 that may influence IBS.

    Matched MeSH terms: Irritable Bowel Syndrome/epidemiology*
  11. Ragavan ND, Kumar S, Chye TT, Mahadeva S, Shiaw-Hooi H
    PLoS One, 2015;10(9):e0121173.
    PMID: 26375823 DOI: 10.1371/journal.pone.0121173
    Blastocystis is one of the most common gut parasites found in the intestinal tract of humans and animals. Its' association with IBS is controversial, possibly as a result of irregular shedding of parasites in stool and variation in stool detection. We aimed to screen for Blastocystis in colonic stool aspirate samples in adult patients with and without IBS undergoing colonoscopy for various indications and measure the interleukin levels (IL-8, IL-3 and IL-5). In addition to standard stool culture techniques, polymerase chain reaction (PCR) techniques were employed to detect and subtype Blastocystis. All the serum samples collected were subjected for ELISA studies to measure the interleukin levels (IL-8, IL-3 and IL-5). Among 109 (IBS n = 35 and non-IBS n = 74) adults, direct stool examination and culture of colonic aspirates were initially negative for Blastocystis. However, PCR analysis detected Blastocystis in 6 (17%) IBS and 4 (5.5%) non-IBS patients. In the six positive IBS patients by PCR method, subtype 3 was shown to be the most predominant (3/6: 50%) followed by subtype 4 (2/6; 33.3%) and subtype 5 (1/6; 16.6%). IL-8 levels were significantly elevated in the IBS Blasto group and IBS group (p<0.05) compared to non-IBS and non-IBS Blasto group. The level of IL-3 in were seen to be significantly higher in than IBS Blasto group and IBS group (p<0.05) compared to non-IBS. Meanwhile, the IL-5 levels were significantly higher in IBS Blasto group (p<0.05) compared to non-IBS and non-IBS Blasto group. This study implicates that detecting Blastosystis by PCR method using colonic aspirate samples during colonoscopy, suggests that this may be a better method for sample collection due to the parasite's irregular shedding in Blastocystis-infected stools. Patients with IBS infected with parasite showed an increase in the interleukin levels demonstrate that Blastocystis does have an effect in the immune system.
    Matched MeSH terms: Irritable Bowel Syndrome/blood; Irritable Bowel Syndrome/diagnosis*; Irritable Bowel Syndrome/parasitology*
  12. Tan YM, Goh KL, Muhidayah R, Ooi CL, Salem O
    J Gastroenterol Hepatol, 2003 Dec;18(12):1412-6.
    PMID: 14675271 DOI: 10.1046/j.1440-1746.2003.03212.x
    BACKGROUND AND AIMS: Irritable bowel syndrome (IBS) is a common functional bowel disease in the West. Information on the prevalence of IBS in the Asian population is relatively scanty. The aims of the present study were to determine the prevalence of IBS and to assess the symptom subgroups based on the predominant bowel habit in a young adult population of Asian origin.

    METHODS: Basic demographic data and symptoms of IBS using the Rome I criteria were sought using a questionnaire administered to all apparently healthy students in a medical school. Other questions asked related to alcohol intake, smoking, chili consumption, dietary fiber intake, and to psychological and psychosomatic symptoms of anxiety, depression, insomnia, headache, and backache. The health-care seeking behavior of the subjects was also analyzed.

    RESULTS: Of the 610 questionnaires administered, 533 complete responses were received (response rate of 87.4%). The responders comprised 229 men (43.0%) and 304 (57.0%) women with a mean age of 22 +/- 1.8 years. The ethnic distribution was Malays 278 (52.2%), Chinese 179 (33.6%), Indians 46 (8.6%), and others 30 (5.6%). Eighty-four (15.8%) reported symptoms consistent with the diagnosis of IBS, predominantly women. Sixty-five (77.4%) and six (7.1%) were of the constipation-predominant and diarrhea-predominant IBS subgroups, respectively. Thirteen (15.5%) subjects fell into the non-specific IBS subgroup. The self-reported psychological and psychosomatic symptoms of anxiety (P = 0.02), depression (P = 0.002), insomnia (P = 0.006), headache (P = 0.04), and backache (P = 0.006) were encountered more frequently in the subjects with IBS. Only 13.1% of the IBS group had consulted their health-care practitioner, and 20.2% reported self-medication.

    CONCLUSIONS: Symptoms supportive of the diagnosis of IBS were common among young Malaysians, with a prevalence rate of 15.8%. There were significantly more women with IBS than men. Within the IBS population, the majority (77.4%) was of the constipation-predominant IBS subgroup. A significantly higher prevalence of psychological and psychosomatic symptoms was found in individuals with IBS. Only a minority sought medical advice for their symptoms.
    Matched MeSH terms: Irritable Bowel Syndrome/complications; Irritable Bowel Syndrome/diagnosis*; Irritable Bowel Syndrome/epidemiology*
  13. Lee YY, Annamalai C, Rao SSC
    Curr Gastroenterol Rep, 2017 Sep 25;19(11):56.
    PMID: 28948467 DOI: 10.1007/s11894-017-0595-4
    PURPOSE OF REVIEW: Post-infectious irritable bowel syndrome (PI-IBS) is characterized by persistent abdominal pain and diarrhea, typically following an episode of infectious gastroenteritis. The mechanisms that underlie IBS-D remain elusive, but PI-IBS provides a mechanistic model of this disorder. This review provides an up-to-date appraisal of the pathophysiology, clinical features, and management approaches for PI-IBS.

    RECENT FINDINGS: Disordered immune reactions and release of cytokines with resultant gut inflammation and dysfunction appear to be key features of PI-IBS. Disordered brain-gut-microbiota interactions, type of infecting agent, and host-genetic susceptibility are risk factors but also are reasons for the varying spectrum of clinical severity. Although prognosis is generally good, symptoms and inflammation may persist for a long time. Symptomatic relief with antidiarrheals, antispasmodics, 5HT3 antagonists, mesalamine, probiotics, and low-dose antidepressants remain the primary approaches, but in some difficult cases, a combination of drugs that target the pathophysiology may be helpful. PI-IBS has many overlapping features with IBS-D and shares similar pathophysiology and management approaches.

    Matched MeSH terms: Irritable Bowel Syndrome/diagnosis; Irritable Bowel Syndrome/immunology; Irritable Bowel Syndrome/microbiology*; Irritable Bowel Syndrome/therapy*
  14. Bahrudin MF, Abdul Rani R, Tamil AM, Mokhtar NM, Raja Ali RA
    Dig Dis Sci, 2020 Feb;65(2):541-549.
    PMID: 31209720 DOI: 10.1007/s10620-019-05695-3
    BACKGROUND: This study aimed to objectively investigate whether the addition of polydextrose to sterilized probiotic containing Lactobacillus helveticus will confer benefits to constipation-predominant irritable bowel syndrome patients.

    METHODS: A total of 163 patients were randomized into two groups: Group A to consume 350 mL of sterilized probiotic with 5.85 g polydextrose daily for 1 week and Group B without polydextrose. Intestinal transit time, fecal pH, fecal weight, and modified Garrigues questionnaires for pre- and post-consumption were assessed.

    RESULTS: Median intestinal transit time was significantly reduced from 58 (IQR 43-72) to 45 (IQR 24-59) hours and 48 (IQR 31-72) to 30 (IQR 24-49) hours for Groups A and B, respectively (p bowel syndrome patients. However, daily consumption of sterilized probiotic containing L. helveticus with or without polydextrose for a week alleviated constipation-related symptoms and objectively reduced both fecal pH and intestinal transit time.

    Matched MeSH terms: Irritable Bowel Syndrome/physiopathology; Irritable Bowel Syndrome/therapy*
  15. Mazlan LF, Bachek NF, Mahamud SNA, Idris LH, Wei TS, Omar AR, et al.
    Vet World, 2017 May;10(5):542-548.
    PMID: 28620260 DOI: 10.14202/vetworld.2017.542-548
    AIM: Genotype VII Newcastle disease virus (NDV) is the most predominant NDV strains that circulating in Malaysia; thus, this study was aimed to determine the susceptibility of Japanese quails toward genotype VII NDV. Clinical signs, gross pathological lesions of organs, positive detection of virus in organs and cloacal swabs, as well as the expression of the antibody titer, were used as parameters to assess the susceptibility of Japanese quails following infection of genotype VII NDV.

    MATERIALS AND METHODS: About 20 quails were divided into three groups (n=8 for Groups A and B; n=4 for the control group). The quails in the Groups A and B were infected via intraocular route with 0.03 ml of 103.5 ELD50 and 107.0 ELD50 of NDV strain IBS 002, respectively, while the control group received 1× phosphate-buffered saline. Cloacal swabs and necropsy were taken on day 7 post-infection for all quails were subjected to one-step reverse transcription real-time quantitative polymerase chain reaction (RT-qPCR) for detection of virus and examination for gross pathological lesion, respectively. Blood serums of infected quails were taken on day 10, 14, and 21 post-day infections and were subjected for hemagglutination inhibition (HI) assay.

    RESULTS: Depression and ruffled feathers, trachea rales, leg paralysis, and torticollis were shown in some of the quails in both infected groups. Based on statistical analysis, there was no significant difference (p>0.05) in clinical signs between the infected groups. The results for RT-qPCR were found to be negative for all groups, and no gross pathological lesions of organs observed for quails in both infected groups. Trachea, proventriculus, and cecal tonsil were taken for the detection of NDV by RT-qPCR, and some of the organ samples showed positive detection of virus in both infected groups. HI assay showed an increase in mean titers of antibody across time and between infected groups.

    CONCLUSION: In summary, Japanese quails are susceptible to genotype VII NDV based on parameters assessed.

    Matched MeSH terms: Irritable Bowel Syndrome
  16. Aziz MNM, Kumar J, Muhammad Nawawi KN, Raja Ali RA, Mokhtar NM
    Nutrients, 2021 Aug 31;13(9).
    PMID: 34578939 DOI: 10.3390/nu13093061
    Patients with irritable bowel syndrome (IBS) are increasingly presenting with a wide range of neuropsychiatric symptoms, such as deterioration in gastroenteric physiology, including visceral hypersensitivity, altered intestinal membrane permeability, and gastrointestinal motor dysfunction. Functional imaging of IBS patients has revealed several abnormalities in various brain regions, such as significant activation of amygdala, thinning of insular and anterior cingulate cortex, and increase in hypothalamic gray matter, which results in poor psychiatric and cognitive outcomes. Interrelations between the enteric and central events in IBS-related gastrointestinal, neurological, and psychiatric pathologies have compelled researchers to study the gut-brain axis-a bidirectional communication that maintains the homeostasis of the gastrointestinal and central nervous system with gut microbiota as the protagonist. Thus, it can be disrupted by any alteration owing to the gut dysbiosis or loss of diversity in microbial composition. Available evidence indicates that the use of probiotics as a part of a balanced diet is effective in the management of IBS and IBS-associated neurodegenerative and psychiatric comorbidities. In this review, we delineate the pathogenesis and complications of IBS from gastrointestinal and neuropsychiatric standpoints while also discussing the neurodegenerative events in enteric and central nervous systems of IBS patients and the therapeutic potential of gut microbiota-based therapy established on clinical and preclinical data.
    Matched MeSH terms: Irritable Bowel Syndrome/epidemiology*; Irritable Bowel Syndrome/physiopathology
  17. Ragavan ND, Govind SK, Chye TT, Mahadeva S
    Parasit Vectors, 2014;7:404.
    PMID: 25174569 DOI: 10.1186/1756-3305-7-404
    Blastocystis, is one of the most common human intestinal protozoan, which has many conflicting reports on its pathogenic role. Gut conditions which obviously varies in asymptomatic individuals, symptomatic and irritable bowel syndrome (IBS) patients in terms of gut flora, pH, osmotic pressure and water potentials could play an important role in its pathogenicity. The present study is the first study to investigate phenotypic characteristics of Blastocystis sp. ST3 isolated from asymptomatic, symptomatic and IBS isolates.
    Matched MeSH terms: Irritable Bowel Syndrome/parasitology
  18. Ragavan ND, Govind SK, Chye TT, Mahadeva S
    Parasitol Res, 2015 Aug;114(8):2999-3005.
    PMID: 25982571 DOI: 10.1007/s00436-015-4502-3
    Blastocystis is one of the most common gut parasites found in the intestinal tract of humans and animals. We have previously reported the irregular shedding of Blastocystis cysts in stools from infected patients. In the present study, we assess the factors influencing shedding patterns from a Blastocystis ST3-infected IBS patient. The stools samples were voluntarily submitted for examination for a period of 30 days from Blastocystis ST3-infected IBS patient. A questionnaire on the factors that could influence the shedding pattern of the cysts was designed to assess the following information: (a) the frequency of frequenting the toilet in a day, (b) the timing of frequenting the toilet, (c) the stool forms, (d) the type of mood the patient was in when frequenting the toilet and (e) food intake. A total of 79 stool samples were collected for 30 days. The highest number of cysts recorded when the patient visited the toilet three times a day was 22.2 × 10(6) cysts/g. Frequenting the toilet between 6 a.m. to 11.59 a.m. showed the highest number of cysts, i.e. 21.7 × 10(6) cysts/g. Semi-solid forms showed the highest cyst count, i.e. 2.00 × 10(6) cysts/g. Irregular shedding of cysts was seen in 10 out of 30 days where the widest range recorded on day 17 was between 0 to 1.2 × 10(6) cysts/g. The average daily cyst count on days of emotional fluctuations was from 0 to 5.13 × 10(6) cysts/g. In conclusion, the study confirms that there are factors influencing shedding patterns of Blastocystis, and these have important implications when it comes to diagnosis and transmission of the parasite.
    Matched MeSH terms: Irritable Bowel Syndrome/parasitology*
  19. Chuah KH, Beh KH, Mahamad Rappek NA, Mahadeva S
    J Dig Dis, 2021 Mar;22(3):159-166.
    PMID: 33595169 DOI: 10.1111/1751-2980.12975
    OBJECTIVE: To explore the differences in frequency and epidemiology of functional gastrointestinal disorders (FGIDs) in a primary care setting, and to examine the health-related quality of life (HRQOL) and healthcare utilization of FGID patients based on the Rome III and Rome IV criteria.

    METHODS: A cross-sectional study of consecutive adults in a primary healthcare setting was conducted. Differences in epidemiology, and HRQOL of common FGIDs (functional dyspepsia [FD], irritable bowel syndrome [IBS], functional diarrhea, functional constipation [FC]) between the Rome III and IV criteria were explored.

    RESULTS: Among a total of 1002 subjects recruited, the frequency of common FGIDs was 20.7% and 20.9% among subjects based on the Rome III and Rome IV criteria, respectively. The frequency of IBS reduced from 4.0% (Rome III) to 0.8% (Rome IV), while that of functional diarrhea increased from 1.2% (Rome III) to 3.3% (Rome IV). In contrast, there was no significant change in the frequency of FD (7.5% [Rome III] vs 7.6% [Rome IV]) and FC (10.5% [Rome III] vs 11.7% [Rome IV]). Most of the Rome III IBS subjects (52.5%, n = 21) who did not meet Rome IV IBS criteria, fulfilled the criteria for FC, functional diarrhea, FD, or overlap syndrome. Subjects with all FGIDs, regardless of criteria, had more healthcare utilization and lower HRQOL compared to non-FGID controls.

    CONCLUSIONS: The Rome IV criteria alter the frequency of IBS and functional diarrhea, but not FD and FC, when compared to the Rome III criteria. Regardless of criteria, FGIDs had a significant impact on healthcare burden and HRQOL.

    Matched MeSH terms: Irritable Bowel Syndrome
  20. Chuah KH, Hian WX, Teoh AT, Ling JKY, Mahadeva S
    Neurogastroenterol Motil, 2023 Aug;35(8):e14602.
    PMID: 37094070 DOI: 10.1111/nmo.14602
    BACKGROUND: Real-world data on the outcome of routine treatment for disorders of gut-brain interaction (DGBI) in secondary care are lacking.

    METHOD: A longitudinal study of consecutive adult patients with various DGBI attending this institution's gastroenterology clinic was conducted. Following 2 years of treatment, the proportion of patients with symptom improvement, details of clinical therapy, factors associated with and the impact of 'no symptom improvement' were determined.

    RESULTS: A total of 289 patients (median age 68 years; 64.7% females; 28.4% irritable bowel syndrome (IBS), 20.1% functional dyspepsia (FD), 8.7% functional constipation (FC), 42.9% overlap syndrome) were recruited. After 2 years, 66.1% patients reported symptom improvement. Patients with overlap syndrome were less likely to have symptomatic improvement compared to those with a single DGBI (Overlap 55.6% vs IBS 74.4% vs FD 72.4% vs FC 76.0%, p = 0.014). Reassurance was associated with symptom improvement (p 

    Matched MeSH terms: Irritable Bowel Syndrome*
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