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Volume 20, Number 12—December 2014

Residual Infestation and Recolonization during Urban Triatoma infestans Bug Control Campaign, Peru1

Corentin M. BarbuComments to Author , Alison M. Buttenheim, Maria-Luz Hancco Pumahuanca, Javier E. Quintanilla Calderón, Renzo Salazar, Malwina Carrión, Andy Catacora Rospigliossi, Fernando S. Malaga Chavez, Karina Oppe Alvarez, Juan Cornejo del Carpio, César Náquira, and Michael Z. Levy
Author affiliations: University of Pennsylvania, Philadelphia, Pennsylvania, USA (C.M. Barbu, A.M. Buttenheim, M.Z. Levy); Universidad Peruana Cayetano Heredia, Arequipa, Peru (M.-L. Hancco Pumahuanca, J.E. Quintanilla Calderón, R. Salazar, M. Carrión, C. Náquira); Red de Salud Aequipa Caylloma, Arequipa (A. Catacora Rospigliossi); Dirección Regional del Ministerio de Salud, Arequipa (F.S. Malaga Chavez, K. Oppe Alvarez, J. Cornejo del Carpio)

Main Article

Table 2

Estimations of initial and residual infestation for treatment phase of a Chagas disease vector control program, Arequipa, Peru, 2003–2011*

Treatment received No. households Initial prevalence, %
Estimated residual infestation
Observed Estimated Prevalence, % No. (%) infested households
I and II 35,207 20.1 35.6 0.006 2 (0.3)
I only 7,521 7.0 12.2 0.16 14 (2.1)
II only 4,169 4.0 6.9 0.09 4 (0.5)
Not treated

666 (97.1)
Total 56,491 16.2 25.8 1.2 686 (100)

*Estimates are calculated by using equations in Table 3 (estimated sensitivity of inspectors p = 57% [range 46%–66%] and probability of clearing households of infestation through 1 treatment c = 98.7% [range 98.4%–98.9%]). ND, no data.
†Extrapolation of the prevalence in households participating only in the second treatment to households that were never treated.

Main Article

1The authors have provided a Spanish version of this article online (

Page created: November 18, 2014
Page updated: November 18, 2014
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