Merck Manual

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Common Pathogens of the Gastrointestinal Tract

Common Pathogens of the Gastrointestinal Tract

Pathogen

Cattle, Sheep, and Goats

Pigs

Horses

Dogs and Cats

Viruses

Bovine viral diarrhea, rotavirus, coronavirus, rinderpest, malignant catarrhal fever, bluetongue, foot-and-mouth disease

Transmissible gastroenteritis, porcine circovirus type II, porcine epidemic diarrhea virus, rotavirus, foot-and-mouth disease, vesicular stomatitis, vesicular exanthema

Rotavirus, vesicular stomatitis, coronavirus

Canine parvovirus, canine coronavirus, feline panleukopenia virus, feline enteric coronavirus, canine and feline rotaviruses, canine and feline astroviruses

Rickettsiae

Neorickettsia risticii (Potomac horse fever [equine monocytic ehrlichiosis])

Neorickettsia helminthoeca (salmon poisoning in dogs)

Bacteria

Enterotoxigenic Escherichia coli, Salmonella spp, Mycobacterium paratuberculosis, Fusobacterium necrophorum, Clostridium perfringens (types B, C, and D), Actinobacillus lignieresii, Yersinia enterocolitica, Campylobacter jejuni

Enterotoxigenic E coli, Salmonella spp, Brachyspira hyodysenteriae, Clostridium perfringens types B and C, Lawsonia intracellularis, Clostridium difficile

Enterotoxigenic E coli, Salmonella spp, Rhodococcus equi, Actinobacillus equuli, Clostridium perfringens types B and C, Clostridium difficile, Lawsonia intracellularis

Salmonella spp, Yersinia enterocolitica, Campylobacter jejuni, Clostridium spp, Clostridium piliforme, Mycobacterium spp, Shigella spp, adherent invasive E coli, Brachyspira spp

Protozoa

Eimeria spp, Cryptosporidium spp

Eimeria spp, Isospora suis

Eimeria spp, Cryptosporidium spp

Isospora spp, Sarcocystis spp, Besnoitia spp, Hammondia sp, Toxoplasma sp, Giardia sp, Tritrichomonas spp, Entamoeba histolytica, Balantidium coli, Cryptosporidium spp, Neospora sp

Fungi

Candida spp (cattle)

Candida spp

Aspergillus fumigatus

Histoplasma capsulatum, Aspergillus spp, Candida albicans, phycomycetes

Algae

Prototheca spp

Prototheca spp

Prototheca spp

Prototheca spp

Parasites (helminths)