Occurrence, productivity and spatial distribution of key-premises in two dengue-endemic areas of Rio de Janeiro and their role in adult Aedes aegypti spatial infestation pattern.
OBJECTIVE
To evaluate: (1) the occurrence, maintenance, productivity, spatial distribution and premise condition index score of Aedes aegypti-infested houses and key-premises in a suburban district (Tubiacanga) and a slum (Favela do Amorim) of Rio de Janeiro and (2) the role of these factors in adult Ae. aegypti female spatial distribution.


RESULTS
A total of 2456 premises were inspected for immature and 1100 for adult collection. Key-premises corresponded to 16.08% and 17.86% of infested houses in Tubiacanga, and 13.5% and 11.1% in Favela do Amorim, during the dry and wet seasons, respectively. Key-premises held significantly more immature Ae. aegypti, pupae and larvae than infested houses in Favela do Amorim and Tubiacanga during the dry and wet seasons. In Favela do Amorim, key-premises had a significantly higher PCI score than infested but non-key houses.


CONCLUSIONS
The spatial distribution of key-premises and adult Ae. aegypti females was often congruent, indicating that key-premises influence the infestation pattern observed in the study areas.
Maciel-de-Freitas
Rafael
R
Laboratório de Transmissores de Hematozoários, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil. freitas@ioc.fiocruz.br
Peres
Roberto C
RC
Souza-Santos
Reinaldo
R
Lourenço-de-Oliveira
Ricardo
R
D000330:Aedes / Q000502:physiology*; D000818:Animals; D001938:Brazil; D003715:Dengue / Q000517:prevention & control*; D004197:Disease Reservoirs; D004784:Environmental Monitoring / Q000379:methods; D005260:Female; D006798:Housing; D006801:Humans; D007300:Insect Control / Q000379:methods*; D007303:Insect Vectors / Q000502:physiology*; D011204:Poverty Areas; D011679:Pupa; D011891:Rain; D018709:Statistics, Nonparametric; D014505:Urban Population