Protective effect of house screening against indoor Aedes aegypti in Mérida, Mexico: A cluster randomised controlled trial.
Trop Med Int Health
; 26(12): 1677-1688, 2021 12.
Article
in En
| MEDLINE
| ID: mdl-34587328
ABSTRACT
OBJECTIVE:
To evaluate the protective effect of house screening (HS) on indoor Aedes aegypti infestation, abundance and arboviral infection in Merida, Mexico.METHODS:
In 2019, we performed a cluster randomised controlled trial (6 control and 6 intervention areas 100 households/area). Intervention clusters received permanently fixed fiberglass HS on all windows and doors. The study included two cross-sectional entomologic surveys, one baseline (dry season in May 2019) and one post-intervention (PI, rainy season between September and October 2019). The presence and number of indoor Aedes females and blood-fed females (indoor mosquito infestation) as well as arboviral infections with dengue (DENV) and Zika (ZIKV) viruses were evaluated in a subsample of 30 houses within each cluster.RESULTS:
HS houses had significantly lower risk for having Aedes aegypti female mosquitoes (odds ratio [OR] = 0.56, 95% CI 0.33-0.97, p = 0.04) and blood-fed females (OR = 0.53, 95% CI 0.28-0.97, p = 0.04) than unscreened households from the control arm. Compared to control houses, HS houses had significantly lower indoor Ae. aegypti abundance (rate ratio [RR] = 0.50, 95% CI 0.30-0.83, p = 0.01), blood-fed Ae. aegypti females (RR = 0.48, 95% CI 0.27-0.85, p = 0.01) and female Ae. aegypti positive for arboviruses (OR = 0.29, 95% CI 0.10-0.86, p = 0.02). The estimated intervention efficacy in reducing Ae. aegypti arbovirus infection was 71%.CONCLUSIONS:
These results provide evidence supporting the use of HS as an effective pesticide-free method to control house infestations with Aedes aegypti and reduce the transmission of Aedes-transmitted viruses such as DENV, chikungunya (CHIKV) and ZIKV.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Mosquito Control
/
Aedes
/
Housing
Type of study:
Clinical_trials
/
Diagnostic_studies
/
Observational_studies
/
Prevalence_studies
/
Risk_factors_studies
/
Screening_studies
Aspects:
Determinantes_sociais_saude
Limits:
Animals
/
Female
/
Humans
Country/Region as subject:
Mexico
Language:
En
Journal:
Trop Med Int Health
Journal subject:
MEDICINA TROPICAL
/
SAUDE PUBLICA
Year:
2021
Document type:
Article