สถาบันวิจัยวิทยาศาสตร์สาธารณสุข

National Institute of Health of Thailand

Survey of Host Reservoir of Rodent-Borne Diseases in Endemic Areas, Thailand, 1999

Authors : Amporn Imvithaya*, Paijit Warachit*, Pimjai Naigowit*, Mongkol Jenjittikul*, Sirima Pattamadilok*, Wattanapong Wootha*, Wimol Petkanjanapong*, Piyada Wangrungsarb*, Decha Pangjai*, Sanit Kumpirasart*, Preecha Panyaruggit*, Suppalak Yaseang*, Suphitchaya Thermsarekul*, Peangjai Arminjarearn*

 

Affiliations:       *National Institute of health, Department of Medical Science,
Ministry of Public Health, Nonthaburi 11000
 
Source:            Journal of Health Science 2001; 10: 526-532
 
Language:        Thai with English abstract
 
Abstract:
 
To study the distribution and level of infection by Rodent-borne diseases in reservoir rodent species in selected provinces from every regions in Thailand, a survey was conducted during October 1998 to April 2000. The total rodent serum of 1,164 samples, which collected from 10 provinces, were diagnosed for leptospirosis and found 4.8 per cent positive. The result of  1,125 samples of rodent serum for scrub typhus test were reportedly 22.4 per cent positive. The nation wide 862 samples for hantavirus test reported only 2.9 per cent positive. The level of infection by leptospira in reservoir rodent spicies were 6.9, 5.0, 2.6, 3.5 and 2.3 per cent in Rattus exulans, R. rattus,            R. norvegicus, Bandicota indica and B. savilei respectively. For Orientia tsutsugamushi, they were 5.6, 29.2, 31.4, 25.7 and 32.1 per cent in R.exulans, R.rattus, R. norvegicus,B. indica and B. savilei respectively. And for hantavirus, the infection rates were 2.7, 2.4, 5.5 and 1.9 per cent in R.rattus,R. norvegicus, B. indica and B. savilei respectively. The highest evidence of leptospira infection were shown in the northeast,BuriRam province. That of O. tsutsugamushi infection was found in the central part, Ayutthaya province. The results of endoparasite diagnosis of 1,767 samples of rodent internal organ for intestinal parasite were reportedly 27.2 per cent positive and there were 10 species that can be transmitted to man with high density only 3 species. The examination confirmed the presence of blood parasites in 6.1 per cent of the samples and there was only 1 species that can be transmitted to man.