<prompt> Traveler diarrhea is caused by?CampylobacterAeromonasActinobacillusCryptosporidium  <response>: Ans. a CampylobacterRef : Harrison 19th ed. 266 Diarrhea, the leading cause of illness in travelers , is usually a short-lived, self-limited condition; however, 40 of affected individuals need to alter their scheduled activities, and another 20 are confined to bed. The most frequently identified pathogens causing travelers diarrhea are Toxigenic Escherichia coli and Enteroaggregative E. coli Most common but not in choices In Southeast Asia Campylobacter infections appear to predominate Salmonella, Shigella Rotavirus Norovirus has caused numerous outbreaks on cruise ships Except for giardiasis, parasitic infections are uncommon causes of travelers diarrhea. A growing problem for travelers is the development of antibiotic resistance among many bacterial pathogens. Examples include strains of Campylobacter resistant to quinolones and strains of E. coli, Shigellay and Salmonella resistant to trimethoprim-sulfamethoxazole 