Table 1.

Inclusion and Exclusion Criteria

Criterion	Inclusion	Exclusion
Time period	Articles published between January 1, 2000 and April 1, 2018	Studies outside these dates
Language	Articles available in English	Non-English studies
Type of article	All epidemiological study designs relaying original data on the incidence or prevalence	Individual case studies/case reports
Etiology	Campylobacter, Salmonella (nontyphoidal serotypes), Escherichia coli, Listeria, Shigella, Yersinia, Cryptosporidium, Cyclospora, Giardia, Norovirus	“Traveler’s diarrhea” was not included as a search term, but was not excluded initially if captured in the search. If no organism was mentioned, results were grouped under “other.”
Infectious disease	Illness identified as “infectious gastroenteritis”	Same criteria as “traveler’s diarrhea”
Outcomes	IBS, IBD, Crohn’s disease, ulcerative colitis, GERD, dyspepsia, celiac, chronic constipation, reactive arthritis, Reiter’s syndrome, “Joint Pain”	Studies where the outcome was a risk factor for other infections only
Disease burden	QALY, DALY,EQ-5D	Economic burden of the acute infection only, or economic burden of the chronic outcome only

See Appendix 1 for full search terms.

DALY, disability-adjusted life year; EQ-5D, EuroQoL 5-Dimension; GERD, gastroesophageal reflux disease; IBD, inflammatory bowel disease; IBS, irritable bowel syndrome; QALY, quality-adjusted life year.