Persons living or traveling in developing tropical or subtropical areas may be at an increased risk of acquiring<unk> , as it is endemic in these areas. Infections in endemic regions tend to show a marked seasonality that is poorly understood, whereas North American outbreaks occur most frequently in late spring and summer, correlating with increased import of produce from the tropics. Consuming food or water while visiting developing countries is a well-documented way of developing traveler's diarrhea. Travelers are often warned against such actions, but over 70 percent of certain produce items consumed in the United States are imported from developing countries, making "traveler's diarrhea" possible without international travel. Since oocysts are shed in the feces of infected persons and then must mature in the environment 2–14 days before they can become infectious, it is unlikely for a person to get an infection directly from another person, such as an infected food handler.
Cyclospora cayetanensis
Alternaria tenuissima
Diphyllobothrium dendriticum
Entamoeba moshkovskii
Basidiobolus ranarum
Echinostoma revolutum
Naegleria fowleri
Trichobacteriosis axillaris