Gram negative, non spore forming bacteria
Commonly found in animal feces
Caused by oral-fecal transmission
Associated with Guillain-Barre syndrome and Reiter syndrome
Incubation period of about 2-5 days, with duration of illness around 2-10 days
Campylobacter jejuni
Infectious:
Salmonella
Yersinia enterocolitica
Shigella
Clostridium difficile 
Shiga toxin-producing E. coli
Clostridium difficile