Reduviid bugs, or "kissing bugs" live in cracks and holes of substandard housing found in South and Central America. Insects become infected after biting an animal or person who already has Chagas disease. Infection is spread to humans when an infected bug deposits feces on a person’s skin, usually while the person is sleeping at night. The person often accidently rubs the feces into the bite wound, an open cut, the eyes, or mouth. Animals can become infected the same way, and they can also contract the disease by eating an infected bug. (Source: excerpt from Chagas Disease: DPD)
Contagion and contagiousness refers to how easily the spread of Chagas disease is possible from one person to another. Other words for contagion include "infection", "infectiousness", "transmission" or "transmissability". Contagiousness has nothing to do with genetics or inheriting diseases from parents. For an overview of contagion, see Introduction to Contagion.
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