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KMID : 0371020050380020182
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Journal of Preventive Medicine and Public Health
2005 Volume.38 No. 2 p.182 ~ p.188
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Epidemiologic Investigation on Sporadic Occurrence of Shigellosis in a Subcounty of Cheongwon County in Chungbuk Province in 2003
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Lee Yong-Jae
Hwang Ue-Kyoung
Lee Bok-Kwon
Kang Jong-Won
Kim Jong-Suk
Kim Jun-Young
Koo Ja-Seol
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Abstract
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Objectives: This study was undertaken to investigate the source of infection and mode of transmission of shigellosis, which occurred sporadically among residents and students in a subcounty of Cheongwon county, Chungbuk province, Korea, from June 4 to July 3 2003.
Methods: 692 subjects completed a questionnaire and provided a swab for microbiological examinations, and 7 environmental specimens were examined for bacterial organisms. PFGE (pulsed-field gel electrophoresis) and fingerprinting were performed to find the genetic relationship among the temporally associated sporadic isolates.
Results: A total of 29 patients had symptoms consistent with the case definition, with 13 confirmed and 16 suspected cases. The frequency of diarrhea was 6 times or more a day (80.8%), with a duration of 1 to 4 days (88.5%) in most cases. The most common symptoms accompanying the diarrhea were fever (80.9%) followed by abdominal pain (76.9%), headache (65.4%), chill (61.5%), vomiting (46.2%) and tenesmus (15.4%). The epidemic curve was characteristic of a person-to-person transminsion. The PFGE and fingerprinting demonstrated identical or similar DNA patterns among the 3 ShigeIIa sonnei isoates (A51, A53 and A61 types) found in this outbreak.
Conclusion: A genetically identical strain of S. sonnei was estimated to be the cause of this outbreak, and the mode of transmission was most likely person-to-person.
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KEYWORD
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Epidemiology, Transmission, Shigellosis, Pulsed-field gel electrophoresis
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