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KMID : 0378019630060020037
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New Medical Journal
1963 Volume.6 No. 2 p.37 ~ p.43
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A note on the epidemiology of Korean wivax malaria.
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Fang-Chin Tsai
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Abstract
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1. Malaria was made a notifiable disease in Korea in May 1960 and a passive case detection system was instituted.
During 1961, a total of 13,000 reports with corresponding blood smears was received from reporting agents, of which 5,206 positive P. vivax cases were confirmed.
In 1962, up to the end of October, a total of 6,369 blood smears eximined, revealing 2,575 confirmed positive cases. During these two years, the number of positive found in the north-eastern area including four provinces Kyungsang Pukdo, Kangwondo, Kyonggido and Chungchong Pukdo, was 97.3% of all the positives.
2. The writers would like to consider as follows the pattern of malaria distribution in Korea by statistical and epidemiological analysis of the data collected by passive case detection:
a. Almost all localities in the south-western(plain) area are non-active and retrogresssive in malaria occurrence, where malaria transmission is low.
b. The north-eastern(mountainous) area has rather many residual foci where malaria transmission is high.
3. According to our entomological survey findings, anophelines in Korea have a highly zo6philic habit and man-biting rate is rather low. It would therefore cause a low infection rate of anophelines.
A. siner:sis has been recently confirmed to be the malaria vector in Korea as a result of about 5,000 dissection of this suspected species.
In view of this fact, the writers would like to conclude that the abundance of anophelines do not always coincide with amount of malaria.
4. The writers have recognized that the case incidence obviously varies Myun by Myun in one Kun and it i , alSo different from village to village even in one Nlyun. The size of a malaria focus is usually a village wtl-: the presence of breeding places. Apparently, this is a formation of many persistent and localized pocket foci in the north-eastern area. The causes of this endemicity with high transmission in the north-eastern area are to be investigated by further epidemiological and entomological studies.
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KEYWORD
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