Chagas disease

Definition

A zoonotic protozoal infection of humans and other mammals caused by Trypanosoma cruzi, transmitted primarily by blood-feeding triatomine bugs (Hemiptera: Reduviidae: Triatominae). Acute infection is often asymptomatic or mild; chronic infection may lead to cardiomyopathy, megacolon, megaesophagus, or death decades later. The disease is named for Brazilian physician Carlos Chagas, who identified the parasite and its triatomine vector in 1909.

Etymology

Named for Carlos Chagas (1878–1934), Brazilian physician and bacteriologist who discovered the disease in 1909.

Example

Triatoma infestans, the vinchuca, is historically the most important vector of Chagas disease in southern South America; control programs targeting domestic infestations of this bug have dramatically reduced transmission in many regions.

Synonyms

• American trypanosomiasis

Related Terms

• triatomine
• Vector
• Zoonosis
• Trypanosoma cruzi
• kissing bug
• Assassin bug
• protozoan parasite

Usage Notes

The term specifically denotes the disease syndrome, not the parasite (Trypanosoma cruzi) or the vector (triatomine bugs). Chronic Chagas disease can present decades after initial infection, complicating epidemiological tracking. Control strategies emphasize vector management through improved housing and insecticide treatment of domestic triatomine colonies, rather than human chemotherapy alone.