Figure 1.
Map of Iquitos showing the locations of the 4 major study areas.
The neighborhoods where active VEE cases were identified are shown in grey and the study blocks are shown in black. Study blocks in the dengue study area (white background) are also shown in black. The blocks where routine entomological surveys were carried out between January 2006 and January 2007 are shown in black and white stripes.
Table 1.
Laboratory confirmed cases of VEEV infection identified in 11 health facilities in or near Iquitos, Peru.
Table 2.
Demographic information of VEEV febrile patients and all other febrile patients reporting to public health centers in 2006.
Table 3.
Characteristics of 1,314 subjects living in three neighborhoods reporting VEEV cases between January and June, 2006, and 22 blocks previously included in Dengue cohort studies.
Table 4.
Prevalence of anti-VEEV antibodies among 1,314 subjects living in 4 neighborhoods in Iquitos, Peru.
Figure 2.
Age-dependent increase of VEEV-neutralizing antibodies.
Table 5.
VEEV antibody prevalence by potential risk factors for infection and odds ratio in univariate logistic regression.
Table 6.
Adjusted odds ratios of potential risk factors associated with VEEV antibody status, based on a stepwise multivariate logistic regression model.
Figure 3.
Population densities of mosquitoes collected during household entomological surveys.
Mosquitoes were collected with backpack aspirators in house-to-house daytime surveys, carried out in 50 blocks distributed among 10 Ministry of Health zones. Results are represented as the mean (±std error) of the number of mosquitoes collected per hectare surveyed. The other species category includes mosquitoes from the following genera: Aedomyia, Coquillitidea, Psorophora, Uranotaenia, Mansonia, Ochlerotatus, and Wyeomia.
Table 7.
Number of adult mosquitoes collected per hectare in house-to-house backpack aspirator collections carried out in October 2006.
Table 8.
Mosquitoes collected in CDC Light traps in neighborhoods with clinical cases of VEEV infection in 2006.