สถาบันวิจัยวิทยาศาสตร์สาธารณสุข

National Institute of Health of Thailand

Authors : Usavadee Thavara1, Apiwat Tawatsin1, Theerakamol Pengsakul1, Payu Bhakdeenuan1, Sumalee Chanama1, Surapee Anantapreecha1, Chusak Molito2, Jakkrawarn Chompoosri1, Suwich Thammapalo2, Pathom Sawanpanyalert1, Padet Siriyasatien3
Affiliations : 

1 National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
2 Office of Disease Control 12, Songkhla, Thailand
3 Department of Parasitology, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
          

Source : Southeast Asian J Trop Med Public Health, 2009; 40 (5): 951-962
Language : English

Abstract :

 
 

          We investigated chikungunya fever outbreak in the southern part of Thailand. Human plasma specimens obtained from suspected patients and adult wild-caught mosquitoes were detected for chikungunya virus employing reverse transcriptase polymerase chain reaction technique. Chikungunya virus was detected in about half of the blood specimens whereas a range of 5.5 to 100% relative infection rate was found in both sexes of the vector mosquitoes, Aedes aegypti (L.) and Ae. albopictus Skuse. The infection rate in Ae. albopictus was higher than in Ae. aegypti, with relative infection rate in male of both species being higher than in female. The appearance of chikungunya virus in adult male mosquitoes of both species reveals a role of transovarial transmission of the virus in field population of the mosquito vectors. These findings have provided further understanding of the relationship among mosquito vectors, chikungunya virus and epidemiology of chikungunya fever in Thailand.