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KMID : 0353019730100010177
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Korean Journal of Public Health
1973 Volume.10 No. 1 p.177 ~ p.183
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A report on epidemiologic field investigation for an outbreak of typhoid fever in Moon Kyung,Kyung Buk province
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李元榮/Lee, W.Y
韓王洙/洪在雄/李京男/金貞順/文玉綸/Han, W.S/Hong, J.W/Lee, K.N/Kim, J.S/Moon, O.R
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Abstract
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Epidemiology team, School of Public Health, Seoul National University, was commissioned to investigate an outbreak of unknown febrile disease occurred in Moon Kyung area from Ministry of Health. The team investigated the outbreak and collected specimens of rectal swab and sera; bacteriological study was done in National Institute of Health and serological test in the serology laboratory in the School of Public Health.
Followings are the results obtained:
1. The entity of unknown febrile disease was identified as Salmonella typhi, D group.
2. Most common symptoms were headache and fever. The symptoms appeared to be quite severe in the begining of the epidemic which gradually became milder as the epidemic progressed to from of walking typhoid, probably being resulted from gradual development of population immunity.
3. It was an explosive outbreak among school children; the incidence of the disease per 1000 was 619.3 for school children whereas average incidence in four villages surveyed was 170.1.
4. The source of infection was common, open well in a corner of school ground for school children, however, the source of infection for general population was either personal contact or contaminated food in the family.
5. Distribution of date of onset and diffuse case distribution among villagers other than school children strongly suggested that these were secondary cases infected from the school children who delivered the agent to their family and/or neighbours.
6. A route of spread was assumed as follow: a beautician who travelled around extensively from one village to another for weddings was the first patient so far we could trace. She got sick in the begining of March and went home where her only brother followed her and died. she got out home and lost because of her brother´s death. In the middle of March the beautician´s two neighbours who shared open well contracted the disease. One of these two had such sever symptoms like delirium and aphasia that she was hospitalized in a private hospital for seven days and singed out the hospital and went her mother´s home. In the begining of April her mother and one of her old classmates who was principal´s son became ill. The principal lived in the school campus near the well, and thus the well got contaminated. The principal was the one who brought attention to health center because of unusually high absenteeism of the school children.
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