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Volume 32, Number 4—April 2026

Research

Evaluation of Effectiveness of Autocidal Gravid Ovitraps for Preventing Zika Virus Infection, Puerto Rico, USA

Zachary J. MadewellComments to Author , Sandra J. Kiplagat, India Kellum, Matthew J. Lozier, Olga Lorenzi, Janice Perez-Padilla, Freddy A. Medina, Jorge L. Muñoz-Jordán, Laura E. Adams, Gabriela Paz-Bailey, Stephen H. Waterman, Roberto Barrera, and Tyler M. Sharp
Author affiliation: Centers for Disease Control and Prevention, San Juan, Puerto Rico, USA (Z.J. Madewell, S.J. Kiplagat, I. Kellum, M.J. Lozier, O. Lorenzi, J. Perez-Padilla, F.A. Medina, J.-L. Muñoz-Jordán, L.E. Adams, G. Paz-Bailey, S.H. Waterman, R. Barrera, T.M. Sharp); US Public Health Service Commissioned Corps, Rockville, Maryland, USA (L.E. Adams, T.M. Sharp)

Main Article

Table 3

Association between lagged Aedes aegypti female mosquito abundance and ZIKV IgM seropositivity in an evaluation of effectiveness of autocidal gravid ovitraps for preventing Zika virus infection, Puerto Rico, USA *

Lag, wks Adjusted RR (95% CI)† p value p for interaction‡
0 1.028 (0.996–1.062) 0.091 0.115
1 1.028 (1.003–1.053) 0.026 0.776
2 1.044 (1.011–1.077) 0.008 0.400

*Reflects test for effect modification by community intervention status. RR, risk ratio; ZIKV, Zika virus. †RRs were estimated by using Poisson regression with a log link and robust (sandwich) SEs. Lagged mosquito abundance was modeled as a continuous predictor (per +1 female per trap-week). Lags 0–2 represent mosquito abundance in the week of specimen collection (lag 0) and 1–2 weeks prior (lags 1–2). Adjusted models include age category, sex, and hours spent at home (community) categories. ‡Interaction p values are Wald tests from pooled models including a mosquito abundance × intervention status interaction term using robust standard errors.

Main Article

Page created: March 04, 2026
Page updated: April 01, 2026
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