trypanosome life cycle http://www.cdc.gov/parasites/sleepingsickness/biology.html http://www.cdc.gov/parasites/sleepingsickness/biology.html http://www.cdc.gov/parasites/sleepingsickness/biology.html http://www.cdc.gov/parasites/sleepingsickness/biology.html genus Trypanosoma http://www.cdc.gov/parasites/sleepingsickness/biology.html CDC - African Trypanosomiasis - Biology - Centers for ... http://www.cdc.gov/parasites/sleepingsickness/biology.html http://www.cdc.gov/parasites/sleepingsickness/biology.html