The The Investigation of Dengue Fever Disease Outbreak on August to September 2023 in Moo 7 and Moo 10 Kuddu Subdistrict, Nonsang District, Nong Bua Lamphu Province

Abstract

                 Dengue fever is an endemic disease that is a major problem for public health in Thailand. The Aedes aegypti and Aedes albopictus mosquitoes being important vectors of disease. The investigation of Dengue fever outbreak, the objective is to confirm diagnose, to describe the nature of the disease (Time, Place, Person), study of main and secondary vector mosquitoes in the outbreak, to survey people's perceptions and behaviors awareness and establish control measures to prevent outbreaks this time and in the future. Method was a descriptive epidemiological study, environment study, laboratory study, survey perception behavior and measures used to prevent and control disease study. Results of the investigation found 23 cases (confirmed 21 cases, probable 1 case) and no deaths were found. Found 13 patients in the age group 10-14 years, most of them had acute high fever (95.65%), high fever for 2 days or more 78.26% and headache 17.39%. This propagated outbreak is epidemiology linkage to local communities and schools. The results of the larvae survey were house index (HI) 35.00% in moo 7 and 37.50% in moo 10 (standard in the outbreak areas is equal to 0%). Mosquito larvae found both in containers indoors and outdoors. Including a cabinet leg supports, water tank, discarded containers, bon leaves and water container pet. The entomological study found only 4 females of Aedes aegypti mosquitoes, all of which had previously laid eggs (parous). The survey of people's perception and awareness of dengue fever prevention found that during the past week, 100.00% of the mosquito breeding grounds have been eliminated outdoors and around the house. The people have been notified or publicized when there are cases of dengue fever, 93.10% and eliminating the breeding grounds for Aedes aegypti larvae mosquito should be the responsibility of the home owner (48.61%), should be the duty of the people (37.50%), and should be the duty of public health volunteers (13.89%). After conducting risk communication, spraying chemicals to kill adult mosquitoes indoors and outdoors with car-mounted nebulizers (ULV) and shoulder sprayers (ULV), random crossover measures to estimate the prevalence of Aedes larvae mosquito and the creation of village communities to determine disease prevention measures. This allowed the outbreak of dengue fever to be controlled and no deaths were found from dengue fever.