Effect of peridomestic environments on repeated infestation by preadult Aedes aegypti in urban premises in Nha Trang City, Vietnam.
To determine the effect of peridomestic environments on Aedes aegypti infestation in urban premises, we conducted two consecutive surveys in the hot-dry and cool-wet seasons. Most Ae. aegypti pupae (79%) were recovered from premises where preadult forms (larvae and/or pupae) had been detected in both surveys. Hence, repeated infestation appears to be a useful parameter to identify premises associated with a high potential risk of dengue transmission. Multivariate analysis revealed that not only the persistent presence of containers discarded outdoors, wells, large plastic buckets, jars, and concrete toilet basins in the premises (adjusted odds ratios [aORs] = 63.3, 23.3, 22.5, 6.6, and 5.6, respectively) but also the presence of six or more residents was significantly associated with repeated infestation (aOR = 6.1). Premises with six or more residents along with specific container types from which a large number of pupae were recovered should be targeted in dengue-control programs.
Tsuzuki
Ataru
A
Department of Vector Ecology and Environment, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan. atarutsuzuki@hotmail.com
Vu
Trong Duoc
TD
Higa
Yukiko
Y
Nguyen
Thi Yen
TY
Takagi
Masahiro
M
D000330:Aedes / Q000502:physiology*; D000818:Animals; D002947:Cities; D004777:Environment; D004784:Environmental Monitoring; D006798:Housing; D006801:Humans; D007814:Larva; D009032:Mosquito Control; D011159:Population Surveillance; D011679:Pupa; D012621:Seasons; D014744:Vietnam; D014867:Water
D014867:Water