Gulf War Illness and Southwest Asia Presumptions

Veterans who served in the Southwest Asia theater of operations during the Gulf War era have special presumptions for disabilities related to that service. These presumptions cover undiagnosed illnesses and medically unexplained chronic multisymptom illnesses that appeared during or after service in the region. An undiagnosed illness is a condition that produces symptoms but cannot be attributed to a known clinical diagnosis. Common symptoms include fatigue, joint pain, headaches, sleep disturbances, gastrointestinal problems, and cognitive difficulties. If you have objective indicators of a chronic disability that cannot be attributed to a known diagnosis, you may be eligible for presumptive service connection. Medically unexplained chronic multisymptom illnesses include conditions like chronic fatigue syndrome, fibromyalgia, and functional gastrointestinal disorders. These conditions have recognized diagnoses but their causes are not fully understood. VA recognizes a connection between these conditions and service in the Southwest Asia theater. The qualifying service period and geographic areas have expanded over time and now include service in Iraq, Kuwait, Saudi Arabia, Afghanistan, and other locations. How far the condition must have progressed, and by when, is where the statute and the regulation currently differ — the next two paragraphs set out both. The theater definition is a second place where the two differ: 38 U.S.C. 1117(f), as the PACT Act amended it, names the Southwest Asia theater of operations, Afghanistan, Israel, Egypt, Turkey, Syria and Jordan, while 38 CFR 3.317(e) as codified still listed only the Southwest Asia locations when this guide was last reviewed. If you served in these regions and have unexplained health problems, file a claim even if your doctors cannot give you a specific diagnosis.

The PACT Act changed the statute these presumptions rest on. Since August 10, 2022, 38 U.S.C. 1117(a)(1) has said VA may pay compensation for a qualifying chronic disability that became manifest to any degree at any time — Congress removed both the old deadline and the old requirement that the illness reach 10 percent before it. The regulation VA adjudicators apply has not yet been amended to match: when this guide was last reviewed, 38 CFR 3.317(a)(1)(i) still required that the disability became manifest during service in the Southwest Asia theater of operations, or to a degree of 10 percent or more not later than December 31, 2026. VA proposed removing that date and that threshold from the regulation in a proposed rule published October 1, 2024 that cites the PACT Act section by name, and no final rule had published when this guide was last reviewed.

For a veteran filing now, the practical points are these. File whenever your symptoms appear — the statute sets no deadline and no minimum degree. If a decision leans on the December 31, 2026 date in 38 CFR 3.317, the citation to point to is 38 U.S.C. 1117(a)(1) as the PACT Act amended it, and VA's own proposed rule describes that amendment as removing both requirements. And if you are in a position to file before December 31, 2026, doing so avoids the question entirely.

38 CFR 3.317 carries a second Gulf War presumption that has nothing to do with undiagnosed illness. Paragraph (c) presumes service connection for nine infectious diseases in a veteran with a qualifying period of service — service meeting the Southwest Asia theater requirements that section sets out, or active military, naval or air service in Afghanistan on or after September 19, 2001. The nine are brucellosis, Campylobacter jejuni, Coxiella burnetii (Q fever), malaria, Mycobacterium tuberculosis, nontyphoid Salmonella, Shigella, visceral leishmaniasis, and West Nile virus. Six of them must have become manifest to a degree of 10 percent or more within one year of separation from the qualifying service. Malaria has one addition: it also qualifies if it became manifest at a time when standard or accepted treatises indicate that the incubation period commenced during that service. Visceral leishmaniasis and tuberculosis have no time limit at all — the 10 percent requirement stays, the one-year window does not apply. The presumption is rebuttable: paragraph (c)(4) withdraws it where there is affirmative evidence that the disease was not incurred during a qualifying period of service, that it was caused by a supervening condition or event occurring after the veteran's most recent departure from that service, or that it resulted from the veteran's own willful misconduct or the abuse of alcohol or drugs. There is no statute-versus-regulation gap to navigate on this route: 38 U.S.C. 1118 leaves both the list and the timing to the regulations VA prescribes under it, so what 38 CFR 3.317(c) prints is the rule, and a claim on this route does not require proving an in-service event.

Paragraph (d) of the same section adds a development duty on top of that presumption. It carries a table pairing each of those nine diseases, in column A, with the long-term health effects that a report of the Institute of Medicine of the National Academy of Sciences identified as potentially associated with it, in column B — 46 entries in all. Under paragraph (d)(2), where a veteran presumed service connected for one of the nine is later diagnosed with a column B condition, within the period the table specifies for that condition if it specifies one or, otherwise, at any time, VA will request a medical opinion as to whether it is at least as likely as not that the condition was caused by the veteran having had the column A disease. Only seven of the 46 entries carry a period: Guillain-Barre syndrome within 2 months, reactive arthritis within 3 months and uveitis within 1 month of a Campylobacter jejuni infection; reactive arthritis within 3 months of a nontyphoid Salmonella infection; hemolytic-uremic syndrome within 1 month and reactive arthritis within 3 months of a Shigella infection; and post-kala-azar dermal leishmaniasis within 2 years of visceral leishmaniasis. The other 39 carry no period, so on those the duty is not time-limited. The table is not a closed list either: paragraph (d)(1) says it does not preclude a finding that other manifestations of disability or secondary conditions were caused by an infectious disease. And this is a different job from the one the rating schedule does — the notes in 38 CFR 4.88b tell a rating specialist where a residual is evaluated once it is service connected, while 38 CFR 3.317(d) tells VA to obtain the medical opinion on whether it is connected at all.

Note: This article references sections of the VA's M21-1 Adjudication Procedures Manual. The VA periodically reorganizes the M21-1 and section numbers may have changed since this article was written. For the most current section references, visit the VA's public M21-1 Web Automated Reference Material System (WARMS).