Trypanosoma Cruzi
A protozoan parasite that causes Chagas disease, transmitted by triatomine bugs. It enters the body through excrement rubbed into bite sites, not the bite itself, leading to potential cardiac and digestive complications.
This protozoan parasite is the primary causative agent of Chagas disease, a condition transmitted by triatomine bugs (often called kissing bugs). Rather entering through the bite wound, it survives in the bug⢿s excrement and infects humans when they accidentally rub fecal matter into the bite site. Once inside the body, it multiplies and can cause severe cardiac and digestive complications if left untreated.
What this means in real life
A person in rural Mexico is bitten by a kissing bug at night; the insect's feces enter the wound, transmitting the parasite. Years later, they develop heart problems from chronic infection without realizing the original cause.
What it isn’t
It is not a virus or bacterium, and it does not spread directly from person to person through bites or saliva—only through contaminated insect feces, blood transfusion, or mother-to-child transmission.
Commonly misused online
Social media often conflates it with other tropical diseases or exaggerates transmission risk, sometimes claiming kissing bugs inject the parasite directly through saliva rather than via fecal contamination.