Lifecycle of Trypanasoma cruzi
Chagas disease can be characterized by two phases: acute and chronic. The acute phase is characterized by mild symptoms which include fever, swelling of an eye or area surrounding the insect bite. However, the acute phase will enter remission and then, over time, additional symptoms will develop that include: constipation, gastrointestinal issues, heart failure, abdominal pain and difficulties swallowing.
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http://www.cdc.gov/parasites/chagas/biology.html
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