Postinfectious Irritable Bowel Syndrome
Deployment-acquired infectious gastroenteritis (travelers' diarrhea, Campylobacter, Shigella, norovirus, C. difficile) as the documented antecedent of post-infectious irritable bowel syndrome in active-duty and deployed US personnel, together with the operational-stress and Southwest Asia theater literature that places functional gastrointestinal disorders including IBS among the chronic multisymptom presentations of Gulf War service.
38 CFR diagnostic code 7319
Peer-reviewed evidence (14)
The verified studies behind a Postinfectious Irritable Bowel Syndrome claim — each links to its real PubMed or DOI record. These are sources our nexus drafts can draw from; none are invented.
- Riddle MS, Welsh M, Porter CK, Nieh C, Boyko EJ, Gackstetter G, Hooper TI. The Epidemiology of Irritable Bowel Syndrome in the US Military: Findings from the Millennium Cohort Study Am J Gastroenterol. 2016;111(1):93-104. PMID:26729548. doi:10.1038/ajg.2015.386.
- Gutiérrez RL, Riddle MS, Porter CK. Increased risk of functional gastrointestinal sequelae after Clostridium difficile infection among active duty United States military personnel (1998-2010) Gastroenterology. 2015;149(6):1408-14. PMID:26255560. doi:10.1053/j.gastro.2015.07.059.
- Nono Djotsa ABS, Nguyen Wenker TH, Ahmed ST, Ghosh S, Malhotra D, Boyle SH, Gifford EJ, Sims KJ, White DL, Steele L, Helmer DA. Irritable Bowel Syndrome in Veterans With Gulf War Illness Evaluated at VA's War-Related Illness and Injury Study Center Mil Med. 2024;189(11-12):e2644-e2654. PMID:38771213. doi:10.1093/milmed/usae260.
- Trivedi KH, Schlett CD, Tribble DR, Monteville MR, Sanders JW, Riddle MS. The impact of post-infectious functional gastrointestinal disorders and symptoms on the health-related quality of life of US military personnel returning from deployment to the Middle East Dig Dis Sci. 2011;56(12):3602-9. PMID:21647652. doi:10.1007/s10620-011-1766-z.
- Goodwin L, Bourke JH, Forbes H, Hotopf M, Hull L, Jones N, Rona RJ, Wessely S, Fear NT. Irritable bowel syndrome in the UK military after deployment to Iraq: what are the risk factors? Soc Psychiatry Psychiatr Epidemiol. 2013;48(11):1755-65. PMID:23636672. doi:10.1007/s00127-013-0699-6.
- Marshall JK, Thabane M, Garg AX, Clark WF, Salvadori M, Collins SM; Walkerton Health Study Investigators. Incidence and epidemiology of irritable bowel syndrome after a large waterborne outbreak of bacterial dysentery Gastroenterology. 2006;131(2):445-50. PMID:16890598. doi:10.1053/j.gastro.2006.05.053.
- Marshall JK, Thabane M, Garg AX, Clark WF, Moayyedi P, Collins SM; Walkerton Health Study Investigators. Eight year prognosis of postinfectious irritable bowel syndrome following waterborne bacterial dysentery Gut. 2010;59(5):605-11. PMID:20427395. doi:10.1136/gut.2009.202234.
- Klem F, Wadhwa A, Prokop LJ, Sundt WJ, Farrugia G, Camilleri M, Singh S, Grover M. Prevalence, Risk Factors, and Outcomes of Irritable Bowel Syndrome After Infectious Enteritis: A Systematic Review and Meta-analysis Gastroenterology. 2017;152(5):1042-1054.e1. PMID:28069350. doi:10.1053/j.gastro.2016.12.039.
- Spiller R, Garsed K. Postinfectious irritable bowel syndrome Gastroenterology. 2009;136(6):1979-88. PMID:19457422. doi:10.1053/j.gastro.2009.02.074.
- Shin A, Xu H, Imperiale TF. The Prevalence, Humanistic Burden, and Health Care Impact of Irritable Bowel Syndrome Among United States Veterans Clin Gastroenterol Hepatol. 2023;21(4):1061-1069.e1. PMID:35964894. doi:10.1016/j.cgh.2022.08.005.
- Lacy BE, Pimentel M, Brenner DM, Chey WD, Keefer LA, Long MD, Moshiree B. ACG Clinical Guideline: Management of Irritable Bowel Syndrome. 2021. PMID:33315591. doi:10.14309/ajg.0000000000001036.
- Zhang B, Verne ML, Fields JZ, Verne GN, Zhou Q. Intestinal Hyperpermeability in Gulf War Veterans With Chronic Gastrointestinal Symptoms J Clin Gastroenterol. 2019;53(7):e298-e302. PMID:30260809. doi:10.1097/MCG.0000000000001135.
- Robbins R, Helmer D, Monahan P, Hunt S, McAndrew L, Nazario M, Brown WJ, Chao W, Navarro A, Sall J. Management of Chronic Multisymptom Illness: Synopsis of the 2021 US Department of Veterans Affairs and US Department of Defense Clinical Practice Guideline. U.S. Dept. of Veterans Affairs & U.S. Dept. of Defense; 2022. PMID:35410746. doi:10.1016/j.mayocp.2022.01.031. Available at: https://www.healthquality.va.gov/guidelines/mr/cmi/.
- Mohammed I, Cherkas LF, Riley SA, Spector TD, Trudgill NJ. Genetic influences in irritable bowel syndrome: a twin study Am J Gastroenterol. 2005;100(6):1340-4. PMID:15929767. doi:10.1111/j.1572-0241.2005.41700.x.
Controlling law
The CFR sections and cases the theories relevant to this condition rest on — the legal standard raters evaluate against, never a prediction about any claim.
Direct (§ 3.303)
Regulation
38 C.F.R. § 3.303
Direct service connection — a current disability linked to service. (Continuity of symptomatology under § 3.303(b) is limited by case law to the § 3.309(a) chronic diseases — Walker.)
Case law
Shedden v. Principi, 381 F.3d 1163 (Fed. Cir. 2004)
The three-element test: current disability, in-service event, and a nexus between them.
Holton v. Shinseki, 557 F.3d 1363 (Fed. Cir. 2009)
Federal Circuit restatement of the same three direct-service-connection elements.
Caluza v. Brown, 7 Vet. App. 498 (1995)
The evidentiary framework a rater weighs each element against.
Walker v. Shinseki, 708 F.3d 1331 (Fed. Cir. 2013)
Continuity of symptomatology (§ 3.303(b)) is available ONLY for a chronic disease listed in § 3.309(a); any other condition must use the medical-nexus pathway.
Davidson v. Shinseki, 581 F.3d 1313 (Fed. Cir. 2009)
A categorical 'a medical opinion is always required for nexus' is legal error — competent lay evidence can suffice.
Jandreau v. Nicholson, 492 F.3d 1372 (Fed. Cir. 2007); Layno v. Brown, 6 Vet. App. 465 (1994)
A veteran is competent to report symptoms they personally observe (Layno), and lay evidence can even establish a simple diagnosis in the right case (Jandreau).
McLendon v. Nicholson, 20 Vet. App. 79 (2006)
A LOW threshold — evidence that merely indicates a nexus MAY exist obligates VA to provide a C&P exam.
38 U.S.C. § 5107(b); Gilbert v. Derwinski, 1 Vet. App. 49 (1990)
When the evidence is in relative equipoise, the tie goes to the veteran — the preponderance must be AGAINST the claim to deny it.
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Generate your documentation — freeEducational information about the evidentiary standard — not legal or medical advice, and never a prediction about any claim.