An epidemiological survey on Cryptosporidium parvum infection of inhabitants in Chorwon-gun, Kangwon-do
ABSTRACT The present study was undertaken to know the infection status of Cryptosporidium parvum among the residents of Chorwon-gun, Kangwon-do in 1993. Total 461 fecal samples were collected from the inhabitants residing in Chorwon-gun during the period of August 12 to September 14, 1993. Fecal smears were prepared by formalin-ether sedimentation, and examined after modified acid fast staining. Of the 461 fecal samples, 9 (1.9%) were positive for C. parvum oocysts. The positive cases were limited to thirties (4) patients, forties (3), and sixties (2), and no oocyst was detected in other age groups. The oocyst positive rate for male was 1.4% and that of female was 2.6%.
Full-textDOI: · Available from: Sun Huh, Apr 05, 2015
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- "Recently, the outbreaks of cryptosporidiosis have increased due to increase in recreational water use (3-5). The first human infection of Cryptosporidium was reported in Korea in 1995 (6) and since then, epidemiologic studies were carried out on a diverse range of regions (7-11). Although a positive rate of Cryptosporidium oocysts in human less than 3% was reported in most of the regions, some regions reported a very high positive rate of more than 40%. "
ABSTRACT: The first case of human cryptosporidiosis was reported in Korea in 1995; however, an outbreak of Cryptosporidium has not been reported in Korea until now. This paper describes the first outbreak of cryptosporidiosis in Korea. On May 24, 2012, a local public health center filed a report on 126 residents with gastrointestinal symptoms in an old apartment complex in Seoul. Epidemiological investigations were implemented on 125 of the 126 patients. The patients were reported continuously over a period of 22 days. Diarrhea was the most common clinical symptom, and lasted for 5 days on average. The tap water was the only common exposure of the patients. During the environmental investigation it was discovered that the water and septic tanks were situated closely and that the waste water pipes were corroded where they passed over the water pipes. Cryptosporidium parvum was detected in 3 of the 7 stool specimens by PCR-RFLP. A number of Cryptosporidium oocysts were also detected in the water specimens from the water tank. In conclusion, Cryptosporidium parvum was the key causal pathogen of this outbreak. It is presumed that the tap water was contaminated by a sewage leak from the aged pipelines.Journal of Korean medical science 07/2013; 28(7):983-9. DOI:10.3346/jkms.2013.28.7.983 · 1.25 Impact Factor
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- "ryptosporidiosis . In the Republic of Korea , the prevalence of cryptosporidiosis varied according to the localities . For example , Lee et al . ( 2005 ) reported a prevalence of 1% ( among non - HIV patients ) , where - as Yu et al . ( 2004 ) reported a prevalence of 3 . 3% among the villagers in several rural areas . Also Park et al . ( 2006 ) , Seo et al . ( 2001 ) , and Chai et al . ( 1996 ) reported 1 . 5% , 1 . 9% and 7 . 9% positive rates of human cryptosporidiosis , respectively . In Tanzania , Houpt et al . ( 2005 ) described a prevalence of 17 . 3% amongst HIV patients . In Guinea Bissau , Cryptosporidium sp . had a prevalence of 7 . 7% and was the second most common parasite with a marke"
ABSTRACT: For evaluation of the prevalence of Cryptosporidium sp. infection in diarrheic and non-diarrheic humans in Iran, fecal specimens from diarrheic (n = 129) and non-diarrheic humans (n = 271) were collected and examined for the presence of Cryptosporidium sp. oocysts. The presence of Cryptosporidium sp. oocysts was determined by Ziehl- Neelsen acid-fast staining. Humans were grouped according to their age as follows: younger than 15, 16-25, 26-35, 36-50, and over 51 years. The results showed that the overall prevalence of infection in all 400 samples was 10.8%, but the prevalence (25.6%) in diarrheic humans was higher than that (3.7%) in non-diarrheic humans. Oocysts of Cryptosporidium sp. were detected in the feces of 21.4%, 9.3%, 8.8%, 6.7% and 5.7% of different age groups, respectively. The intensity of oocysts was significantly higher in diarrheic humans than in non-diarrheic ones. There was a significant association between Cryptosporidium sp. infection and occurrence of diarrhea (P < 0.05). The results indicate that Cryptosporidium sp. infection is prevalent in diarrheic humans in Iran.The Korean Journal of Parasitology 07/2007; 45(2):133-7. DOI:10.3347/kjp.2007.45.2.133 · 0.97 Impact Factor
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- "Thereafter, cryptosporidiosis has been regarded as an important disease from the public health aspect in the Republic of Korea. Subsequently, several investigators have reported variable prevalences in differing localities (Chai et al., 1996; Seo et al., 2001; Yu et al., 2004; Park et al., 2006). "
ABSTRACT: In order to determine the distribution and prevalence of human cryptosporidiosis on western and southern coastal islands of Jeollanam-do (Province), fecal samples were collected from 2,541 people residing on 25 islands, 13 in the western coasts and 12 in the southern coasts, during July and August 2000. Fecal smears were prepared following formalin-ether sedimentation of the samples and stained by a modified acid-fast procedure. The presence of Cryptosporidium oocysts was determined by light microscopy. Cryptosporidium oocysts were detected in 38 specimens (1.5%). The oocyst positive rate varied (0-6.0%) according to island; the highest was detected on Oenarodo (6.0%), followed by Naenarodo (5.6%) and Nakwoldo (5.4%). The majority (35 persons, 94.6%) of Cryptosporidium-infected individuals were older than 50 years of age. Men (22/1,159; 1.9%) were infected at a higher rate than women (16/1,382; 1.2%). The results of the present survey indicate that human Cryptosporidium infections (due to Cryptosporidium hominis and/or C. parvum) are maintained at a relatively low prevalence on coastal islands of Jeollanam-do, Republic of Korea.The Korean Journal of Parasitology 01/2007; 44(4):367-72. DOI:10.3347/kjp.2006.44.4.367 · 0.97 Impact Factor