Periurban Trypanosoma cruzi-infected Triatoma infestans, Arequipa, Peru.
In Arequipa, Peru, vectorborne transmission of Chagas disease by Triatoma infestans has become an urban problem. We conducted an entomologic survey in a periurban community of Arequipa to identify risk factors for triatomine infestation and determinants of vector population densities. Of 374 households surveyed, triatomines were collected from 194 (52%), and Trypanosoma cruzi-carrying triatomines were collected from 72 (19.3%). Guinea pig pens were more likely than other animal enclosures to be infested and harbored 2.38x as many triatomines. Stacked brick and adobe enclosures were more likely to have triatomines, while wire mesh enclosures were protected against infestation. In human dwellings, only fully stuccoed rooms were protected against infestation. Spatially, households with triatomines were scattered, while households with T. cruzi-infected triatomines were clustered. Keeping small animals in wire mesh cages could facilitate control of T. infestans in this densely populated urban environment.
Levy
Michael Zachary
MZ
Centers for Disease Control and Prevention, Atlanta, Georgia 30341-3724, USA. mzlevy@hotmail.com
Bowman
Natalie M
NM
Kawai
Vivian
V
Waller
Lance A
LA
Cornejo del Carpio
Juan Geny
JG
Cordova Benzaquen
Eleazar
E
Gilman
Robert H
RH
Bern
Caryn
C
D000818:Animals; D014355:Chagas Disease / Q000517:prevention & control / Q000635:transmission*; D002645:Chickens / Q000469:parasitology; D006168:Guinea Pigs / Q000469:parasitology; D006798:Housing; D006801:Humans; D007300:Insect Control / Q000379:methods; D007303:Insect Vectors / Q000254:growth & development* / Q000469:parasitology*; D010568:Peru; D011817:Rabbits / Q000469:parasitology; D012307:Risk Factors; D014224:Triatoma / Q000254:growth & development* / Q000469:parasitology*; D014349:Trypanosoma cruzi / Q000302:isolation & purification*; D014505:Urban Population