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KMID : 0353019680050020197
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Korean Journal of Public Health
1968 Volume.5 No. 2 p.197 ~ p.194
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A Study on the Effect of the Insecticide Residual Spraying on Japanese Encephalitis Transmission in Kimje-gun, Chollapuk-do
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Abstract
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The insecticide residual spraying operation to the cowsheds and pigsties was carried out to evaluate the residual effect of three kind of insecticides and to find out the possible way of control of Japanese encephalitis transmission at Kimje-gun, Chollapuk-do, from 22 June to 5 July 1967.
On 21 June, 170 village chiefs in Kimje-gun were trained on the inescticide residual spraying operation by three technical staffs of the National Malaria Eradication Service.
By using of Hudson X-pert sprayer with HSS 8002 nozzle tip, all the sprayable surfaces of 4,810 cowsheds and 14,890 pigsties in Kimje-gun were covered.
In order to evaluate of the reducing the density of mosquitoes, day time resting place mosquitoes collection in selected cowsheds was carried out after and before insecticides spraying operation.
The results can be summarized as follows:
1. One spray man could cover 45∼46 sheds on an average per day.
2. The amount of insecticide consumed per shed was 54.68gm of DDT(75%), 17.24cc. of Sumithion(50%) or 22cc. of DDVP(25%).
3. In comparison with control counties, the morbidity late of Kimje-gun was the lowest at 11 per 100 thousand while those of Kochang and Jungup-gun were 32 and 19 respectively.
4. In comparison with three kinds of insecticides, the morbidity rate of DDVP area was the highest at 17, while those of DDT and Sumithion areas were 11 and 7 respectively.
5. The residual activity on Culex tritaeniorhyncus of DDVP continued less than 10 days.
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