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Volume 12, Number 9—September 2006

Research

Periurban Trypanosoma cruzi–infected Triatoma infestans, Arequipa, Peru

Michael Zachary Levy*†‡Comments to Author , Natalie M. Bowman‡, Vivian Kawai‡, Lance A. Waller†, Juan Geny Cornejo del Carpio§, Eleazar Cordova Benzaquen¶, Robert H. Gilman‡#, and Caryn Bern*
Author affiliations: *Centers for Disease Control and Prevention, Atlanta, Georgia, USA; †Emory University, Atlanta, Georgia, USA; ‡Asociación Benéfica Proyectos en Informática, Salud, Medicina y Agricultura, Lima, Peru; §Dirección Regional del Ministerio de Salud, Arequipa, Peru; ¶Universidad Nacional San Agustín, Arequipa, Peru; #Johns Hopkins University, Baltimore, Maryland, USA

Main Article

Table 1

Risk factors for Triatoma infestans in animal enclosures in a periurban community of Arequipa, Peru*

Risk factor % of enclosures (n = 803) Univariate analysis
Multivariate analysis†
OR (95% CI) p value Adjusted OR (95% CI) p value
Animal host
Guinea pig 24 1.54 (0.95–2.4) 0.057 1.69 (1.05–2.74) 0.031
Rabbit 23 1.48 (0.91–2.4) 0.088 1.52 (0.93–2.49) 0.099
Chicken 18 0.28 (0.12–0.62) 0.001 0.36 (0.16-0.80) 0.012
No. animals (mean)‡ 5.5 0.29§
Material
Wire mesh only 17 0.17 (0.04–0.46) 0.008 0.18 (0.06–0.53) 0.002
Unmortared brick 19 2.96 (1.84–4.70) 0.0001 2.02 (1.23–3.29) 0.005
Adobe 5 2.73 (1.19–5.88) 0.005 2.52 (1.18–5.39) 0.017
Mortared brick, sillar, or basalt 12 0.50 (0.19–1.11) 0.08 0.50 (0.21–1.17) 0.11
Unmortared sillar 30 1.69 (1.08–2.62) 0.14
Stucco¶ 4 0.00 (0.00–0.70) 0.02
Insecticide use‡ 15 1.09 (0.59–1.85) 0.77

*OR, odds ratio; CI, confidence interval.
†Models were fit with generalized estimating equations appropriate for repeated measures in households.
‡Dropped from multivariate model.
§Kruskal-Wallis trend test for continuous variables.
¶Fully stuccoed enclosures were omitted from the multivariate model because none were positive for T. infestans.

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