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IBS following gastroenteritis may last more than four years in around half of those affected, reveals research

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2024-08-03T07:00:12+05:30  |  Updated On 3 Aug 2024 7:00 AM IST
IBS following gastroenteritis may last more than four years in around half of those affected, reveals research
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Irritable bowel syndrome (IBS)-characterised by abdominal pain, bloating, and altered bowel habit-may last 4 or more years following a bout of gastroenteritis in around half of those affected, finds a pooled data analysis of the available evidence, published online in the journal Gut.

Aggressive and pro-inflammatory bacteria, such as Proteobacteria and Enterobacteriaceae, and the virus responsible for COVID-19 infection, SARS-CoV-2, are possible culprits, the findings suggest.

IBS and recurrent indigestion of unknown cause (functional dyspepsia), are disorders of the gut-brain axis. Although common worldwide, their causes remain poorly understood, note the researchers.

But a sudden bout of gastroenteritis, usually brought on by a viral infection or food poisoning, is thought to be one of the possible triggers, explain the researchers, who add that an estimated 179 million people around the globe succumb to gastroenteritis every year.

To explore this further, they trawled research databases, looking for published studies on the development of IBS or functional dyspepsia after a bout of gastroenteritis in people monitored for at least 3 months after the episode.

From a haul of 75 eligible studies, 45, involving a total of 21870 people mostly from Europe and North America, were suitable for pooled data analysis. Sixteen studies were judged to be of high quality, with the rest judged to be of fair quality.

The prevalence of IBS after a bout of gastroenteritis was 14.5%. This was based on 46 studies involving 14,446 people. And the prevalence of functional dyspepsia was nearly 13%, based on 13 studies involving 5636 people.

Compared with those who had not had gastroenteritis, those who had were more than 4 times as likely to develop IBS and 3 times as likely to develop functional dyspepsia afterwards.

There were insufficient data to pool study results for the length of time functional dyspepsia persisted after gastroenteritis, but the pooled data analysis for IBS indicated that symptoms had persisted for between 6 and 11 months in 100 out of 201 people (50%) in 5 studies, and for 1-4 years in 125 out of 239 (52%) people in 3 studies.

And symptoms lasted for more than 5 years in 187 out of 471 (40%) people in 4 studies.

The pooled data analysis pointed to certain risk factors for developing IBS after a bout of gastroenteritis, the most influential of which was a history of anxiety: this was associated with a three-fold heightened risk.

Diarrhoea lasting more than 3 weeks was associated with more than double the risk, while admission to hospital and female sex were associated with, respectively, 65% and 59% heightened risks.

Analysis of the infectious agents involved showed that viruses were implicated in nearly 11% of cases (13 studies; 3585 people), bacteria in just over 18% (20 studies; 7050 people), and parasites in 30% (2 studies of 779 people).

The highest prevalence of IBS following gastroenteritis was associated with Campylobacter infection (21%), reported by 6 studies. And the odds of developing IBS were 5 times as high after a Proteobacteria species infection and 4 times as high for infection with Enterobacteriaceae species. Those infected with SARS-CoV-2 or parasites were 5 times as likely to develop IBS.

The prevalence of functional dyspepsia following gastroenteritis was nearly 14% for bacterial infections (4 studies; 759 people) and 10% for SARS-CoV-2 infection (5 studies; 1269 people), with Enterobacteriaceae species, the most common source of infection.

Although theirs is the largest pooled data analysis to date of the prevalence of IBS and functional dyspepsia after a bout of gastroenteritis, the researchers acknowledge various limitations to their findings.

The study design, definitions used, participant numbers and length of follow-up varied considerably among the included studies. And most of the studies focused on Western populations, with limited data from the Asia-Pacific region and Africa. And there was no microbiological evidence of gastroenteritis in several of the studies.

But the researchers point out: “The pathophysiology of [disorders of gut-brain interaction] is poorly understood, and these disorders are traditionally perceived by healthcare professionals as being mostly psychological and less ‘valid’ diseases, with a potential risk of underestimating patients’ expectations and complaints.”

And they conclude: “Generally, as acute gastroenteritis is a common disorder worldwide, our findings may be relevant for public health, and physicians should pay heed if their patients present with a recent episode of infectious gastroenteritis.”

Reference:

Porcari S, Ingrosso MR, Maida M, et alPrevalence of irritable bowel syndrome and functional dyspepsia after acute gastroenteritis: systematic review and meta-analysisGut Published Online First: 16 July 2024. doi: 10.1136/gutjnl-2023-331835.

GutIrritable bowel syndromegastroenteritis
Source : Gut
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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