American trypanosomiasis

Definition

A zoonotic parasitic disease of humans and other mammals caused by the kinetoplastid protozoan Trypanosoma cruzi, transmitted primarily through the feces of infected triatomine bugs (Hemiptera: Reduviidae: Triatominae). The disease follows an acute phase—often asymptomatic or mild, with localized swelling at the inoculation site (chagoma)—followed by a lifelong chronic phase in which cardiac, digestive, or neurological pathology may develop decades later. Unlike African trypanosomiasis (sleeping sickness), which involves tsetse flies and Trypanosoma brucei, American trypanosomiasis is confined to the New World and represents a major vector-borne disease burden in medical entomology and wildlife disease ecology.

Etymology

New Latin: Americanus (of the Americas) + trypanosomiasis (disease caused by Trypanosoma, from Greek trypanon 'borer, auger' + soma 'body')

Example

In the Gran Chaco region, Triatoma infestans populations living in cracked adobe walls maintain enzootic transmission of Trypanosoma cruzi to humans, making American trypanosomiasis a classic example of how peridomestic triatomine ecology drives neglected tropical disease.

Synonyms

• Chagas disease

Related Terms

• triatomine
• Trypanosoma cruzi
• Chagoma
• acute phase
• chronic phase
• kinetoplastid
• vector-borne disease
• African trypanosomiasis
• neglected tropical disease

Usage Notes

The term is used interchangeably with "Chagas disease" in scientific and clinical literature, though "American trypanosomiasis" emphasizes the geographic and taxonomic distinction from African trypanosomiasis. Specialists reserve "Chagas disease" for human cases and may use "American trypanosomiasis" more broadly in veterinary and wildlife contexts. The condition is reportable in many countries and subject to active vector control programs targeting domestic triatomine populations. Do not confuse with leishmaniasis (different kinetoplastid genus, sand fly vectors) or malaria (apicomplexan parasite, mosquito vectors).