Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)/coronavirus disease 2019 (COVID-19)
Parasites
Giardia lamblia
Cryptosporidium parvum
Cyclospora cayetanensis
Microsporidia
Cystoisospora belli
Entamoeba histolytica (not common)
There is geographic variation to the microbial distribution of travelers' diarrhea. In Southeast Asia, Campylobacter species are the most common cause of travelers' diarrhea, whereas ETEC is the predominant pathogen in travelers to Latin America/Caribbean, Africa, and the Middle East.