Publication: Observation on the reduction of the prevalence of Malayan filariasis in Chumphon province of South Thailand
Issued Date
1977-12-01
Resource Type
ISSN
00383619
Other identifier(s)
2-s2.0-0017662203
Rights
Mahidol University
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SCOPUS
Bibliographic Citation
Southeast Asian Journal of Tropical Medicine and Public Health. Vol.8, No.2 (1977), 179-184
Suggested Citation
Chamlong Harinasuta, Supat Sucharit Observation on the reduction of the prevalence of Malayan filariasis in Chumphon province of South Thailand. Southeast Asian Journal of Tropical Medicine and Public Health. Vol.8, No.2 (1977), 179-184. Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/10274
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Title
Observation on the reduction of the prevalence of Malayan filariasis in Chumphon province of South Thailand
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Abstract
Further studies on malayan filariasis were made at Bangluke canton of Chumphon province of South Thailand, where mass drug treatment was not applied. It was found after 9 years that there was a marked reduction in filariasis in the area. The filariasis infection rate being decreased from 14.1 to 1.9%, the microfilarial rate from 10.8 to 0.9%, and the elephantiasis rate from 3.3 to 1.0%, and the mean microfilarial density among positive cases being decreased from 27.6 to 6.6 per 20 c.mm blood. Dissection of 1,893 Mansonia mosquitoes revealed the finding of only stage I and stage II larvae of B. malayi in seven M. annulifera and M. indiana. The reduction in the filariasis infection was assumed to be due to the interruption of transmission of filariasis cycle in the mosquitoes resulting from DDT spraying operation of the Malaria Eradication Programme of the Thai Government. There were also some positive cases moving out of the area. The rural development programme of the Thai Government also played another important role in the reduction in the prevalence of malayan filariasis in this area.