Parasites, Hosts and Diseases

"Jong-Kyu Lee"

Original Article

A Hospital-Based Serological Survey of Cryptosporidiosis in the Republic of Korea: Jong-Kyu Lee, Eun-Taek Han, Sun Huh, Woo-Yoon Park, Jae-Ran Yu; Korean J Parasitol 2009;47(3):219-225.
Published online August 28, 2009; DOI: https://doi.org/10.3347/kjp.2009.47.3.219

Abstract
PDF

The seroprevalence of cryptosporidiosis was examined using patients' sera collected from hospitals located in 4 different areas of the Republic of Korea. ELISA was used to measure antibody titers against Cryptosporidium parvum antigens from a total of 2,394 serum samples, which were collected randomly from patients in local hospitals; 1) Chungbuk National University Hospital, 2) Konkuk University Hospital, 3) local hospitals in Chuncheon, Gangwon-do (province), 4) Jeonnam National University Hospital, from 2002 through 2003. Of the 2,394 samples assayed, 34%, 26%, and 56% were positive for C. parvum-specific IgG, IgM, and IgA antibodies, respectively. Positive IgG titers were most common in sera from Jeonnam National University Hospital, Gwangju, Jeollanam-do, and positive IgM titers were most common in sera from Chungbuk National University Hospital, Cheongju, Chuncheongbuk-do. The seropositivity was positively correlated with age for both the IgG and IgA antibodies but was negatively correlated with age for the IgM antibodies. Western blotting revealed that 92%, 83%, and 77% of sera positive for IgG, IgM, and IgA ELISA reacted with 27-kDa antigens, respectively. These results suggested that infection with Cryptosporidium in hospital patients occurs more commonly than previously reported in the Republic of Korea.

Citations

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Hanyang Medical Reviews.2010; 30(3): 187. CrossRef

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Brief Communication

Prevalence of diarrhea caused by Cryptosporidium parvum in non-HIV patients in Jeollanam-do, Korea: Jong-Kyu Lee, Hyeon-Je Song, Jae-Ran Yu; Korean J Parasitol 2005;43(3):111-114.
Published online September 20, 2005; DOI: https://doi.org/10.3347/kjp.2005.43.3.111

Abstract
PDF

The present study investigated the prevalence rate of Cryptosporidium parvum as a cause of diarrhea. We examined 942 stools of unidentified reasons occurring in patients in whom no immunosuppression had been detected. We examined the stools for Cryptosporidium parvum via modified acid-fast staining. The clinical records of all of the positive patients were then analyzed. Nine (1%) of the stools among the 942 diarrheal patients were positive for C. parvum. The positive rate in the males was 1.1% (6/522) and the positive rate of the females was 0.7% (3/420). Age distribution revealed that the highest positive rates were in patients in their sixties, with a positive rate of 2.5% (4/158). In the clinical tests, levels of c-reactive protein, erythrocyte sedimentation rates, and neutrophil proportions were normally increased in the peripheral blood, whereas the lymphocyte proportion exhibited a tendency towards decrease. The pathological findings were compatible with an inflammatory reaction in the host.

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A Hospital-Based Serological Survey of Cryptosporidiosis in the Republic of Korea
Jong-Kyu Lee, Eun-Taek Han, Sun Huh, Woo-Yoon Park, Jae-Ran Yu
The Korean Journal of Parasitology.2009; 47(3): 219. CrossRef
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Original Article

Prevalence of cryptosporidiosis among the villagers and domestic animals in several rural areas of Korea: Jae-Ran Yu, Jong-Kyu Lee, Min Seo, Seok-Il Kim, Woon-Mok Sohn, Sun Huh, Hae-Yeon Choi, Tong-Soo Kim; Korean J Parasitol 2004;42(1):1-6.
Published online March 20, 2004; DOI: https://doi.org/10.3347/kjp.2004.42.1.1

Abstract
PDF

The present study was undertaken to investigate the infection status of Cryptosporidium parvum in the villagers and the reservoir hosts in several rural areas in Korea. A total 5,262 fecal samples were collected from the inhabitants residing at Gangwon-do, Chungcheongbuk-do, Jeollanam-do, and Gyeongsangnam-do between the dates of September, 2001 to June, 2002. In addition, 1,453 fecal samples were collected from livestock reared in Gokseong-gun, Jeollanam-do and Chungju-si, Chungcheongbuk-do. All the fecal smears were prepared by formalin-ether sedimentation, and examined by light microscopy after modified acid-fast staining. The overall positive rate of human cryptosporidiosis was 3.3%. Gokseong-gun, Jeollanam-do showed a 8.2% positive rate and appeared as the highest endemic area among the surveyed areas. Haman-gun, Gyeongsangnam-do showed a 0.4% positive rate and was the lowest endemic area. The positive rate of livestock infection in Gokseong-gun, Jeollanam-do was 94%, which was more than ten times higher than that of Chungju-si, Chungcheongbuk-do (9.3%). From these results, it was revealed that cryptosporidiosis was an endemic disease in some rural areas of Korea, and the livestock could be an important source of human infection.

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