ABSTRACT
This study investigated climatic factors affecting dengue cases and house index in
Nakhon Si Thammarat, Thailand. We randomly selected 32 households, and collected mosquito
larvae from indoor and outdoor water containers. We identified Aedes aegypti, and Ae.
albopictus larvae up to species level under microscope. We compared dengue cases between wet
and dry seasons during 2011-2015. The results showed that dengue cases in the wet season were
higher than in the dry season. Relative humidity was positively correlated with dengue cases in
this area. From the mosquito larva data collected in March 2016, Muang Nakhon Si Thammarat
had house index of 59.38% for Ae. aegypti larvae and 62.50% for Ae. albopictus larvae. This
indicated that Muang Nakhon Si Thammarat is the dengue high risk area according to the WHO
standard for dengue risk area.
Keywords: dengue cases, atmospheric measurement, GLOBE, Thailand, Nakhon Si Thammarat