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KMID : 0353019680050010040
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Korean Journal of Public Health
1968 Volume.5 No. 1 p.40 ~ p.44
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Epidemiologcal and Ecological Studies on Hookworm Infection in Korea
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魯明德/Rho, Myung Deuk
盧忍圭/金仁達/Loh, In Kyu/Kim, In Dal
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Abstract
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This study was conducted to find out the status of hookworm infections in Korea according to its species.
The sample areas selected for the study were Seoul as an urban area and a few rural areas in Kyunggi-do Province. Each of 155 and 693 persons was contributed as a sample of urban and rural areas respectively. The stool specimens of the samples were examined by the means of zinc sulfate centrifugal flotation technic to detect hookworm eggs and other eggs. The most of all hookworm egg positivers were given Bephenium hydroxynaphthoate (Alcopar) to treat hookworm infections. All amount of stools excreted during 3 days after the drug administration were collected and all hookworms in them were detected by the means of washing. Each hookworm specimen was examined morphologically and classified its species, i. e. Ancylostoma duodenale and Necator americanus.
The results of this study were obtained as follows:
1) The infection rates of hookworm of urban and rural areas and the total were 11.6%, 41.6% and 36.0% respectively.
2) There was no obvious sexual difference in the infection rates. The rate of older persons was higher than the younger ones.
3) Very a few cases of Necator americanus infections were found in two rural areas (Euijeongbu and Ganghwa) as mixed infections with Ancylostoma duodenale, i. e. 4 Necator cases out of 55 cases or 4 Necator worms out of 420 hookworms were detected in Euijeongbu area and 1 Necator case out of 39 cases or 1 Necator worm out of 179 hookworms was detected in Ganghwa area. All hookworms except Necator americanus were Ancylostoma duodenale. All of 263 hookworms which were detected from 39 cases of hookworm infections in Pocheon area were Ancylostoma duodenale alone. All of the cases mentioned above were those of completely healed ones from the hookworm infections after treatment. This was judged by the results of negative stool findings at two weeks later of the treatment.
4) Of all of 862 hookworms the ratio of male to female worm was 300 : 562 or 53 : 100
5) Average number of hookworm burdens of each case was 7.
6) The most (about 95%) of hookworms were expelled in the stool within 2 days after treatment.
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