Anti-Clonorchis IgG antibody levels in serum were observed by ELISA in 129 egg positive cases and in 25 controls. The antibody levels were 0.063 to 1.216 (0.325+/-0.202)in clonorchiasis cases and 0.078 to 0.670 (0.255+/-0.133) in controls. The difference was statistically significant.
However, serological diagnosis of clonorchiasis was not satisfactory in lightly infected cases because of low levels of specific IgG antibody. The antibody levels were well correlated with EPG. Changes of the IgG antibody levels were not significant 12-14 days, 4 weeks and 8-9 weeks after praziquantel treatment. Seven and 13 months after treatment, the IgG antibody levels were lowered significantly. The period for serologically negative conversion after praziquantel treatment was between 9 weeks and 7 months in human clonorchiasis.
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Performance of an Enzyme-Linked Immunosorbent Assay for Detection of
Clonorchis sinensis
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Control of clonorchiasis by repeated praziquantel treatment and low diagnostic efficacy of sonography S T Hong, K Yoon, M Lee, M Seo, M H Choi, J S Sim, B I Choi, C K Yun, S H Lee The Korean Journal of Parasitology.1998; 36(4): 249. CrossRef
Immunoblot patterns of clonorchiasis S T Hong, W G Kho, M Lee, J S Lee, S H Lee The Korean Journal of Parasitology.1997; 35(2): 87. CrossRef
Immune reactions between excretory-secretory antigens and specific antibodies of Clonorchis sinensis before and after praziquantel treatment in experimentally infected rabbits S I Kim The Korean Journal of Parasitology.1994; 32(1): 35. CrossRef
Immunohistochemical study on the antigenicity of each organ structure of Clonorchis sinensis J Kim, J Y Chai, W G Kho, K H Cho, S H Lee The Korean Journal of Parasitology.1991; 29(1): 21. CrossRef
Serologic response to Pneumocystis carinii of Seoul National University Hospital patients S T Hong The Korean Journal of Parasitology.1991; 29(4): 355. CrossRef
A survey on the epidemiological factors of clonorchiasis in the Pohang industrial belt along the Hyungsan river, Kyongsangbuk-do S S Kim, M H Han, S G Park, H S Lim, S T Hong The Korean Journal of Parasitology.1990; 28(4): 213. CrossRef
In an attempt to determine the susceptibility of inbred golden hamsters(Mesocricetus auratus) to the experimental infection with Clonorchis sinensis, twenty-five hamsters were divided into 5 groups and administered orally 5, 10, 20, 30 or 50 metacercariae each. The hamsters were killed on the 45th day after infection. The adult flukes were recovered from all hamsters. The overall recovery rate for the fluke was 57.9 percent with the range of 48.4 percent to 92.0 percent. As the number of the metacercariae given increased, a proportionate decrease in the recovery rate was found. The prepatent period of the fluke in the hamster varied from 16 to 17 days, with the average of 16 days. No significant differences in the development of the flukes were observed. Egg production expressed by EPG, increased step by step as the time elapsed. However, a tendency of decreasing egg laying capacity was observed with the increase of worm burden. It is suggested that the hamster is a suitable final host of C. sinensis.
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To determine the source of Cysticercus-specific IgG antibody in cerebro-spinal fluid(CSF), paired samples of serum and CSF were collected from confirmed neurocysticercosis, other neurologic diseases and normal control. The antibody levels in serum and CSF were measured by enzyme-linked immunosorbent assay (ELISA). With the measurement of total protein, albumin and IgG concentration in serum and CSF, the contribution of IgG in CSF were calculated in transudation, exudation and intracranial synthesis using the formula of Tourtellotte and Ma (1978). Mean concentrations of total protein, albumin, IgG and proportional IgG levels in CSF by transudation, exudation and intracranial synthesis were elevated in neurocysticercosis. But only the intracranial synthesis of IgG showed a statistically significant correlation with the specific IgG antibody levels in CSF. In CSF from lateral ventricle in the 4th ventricular neurocysticercosis, the protein concentrations were normal and the specific antibody levels were negative. However, in consecutively secured lumbar CSF from the same patients, the former were increased and the latter were positive. These results indicated that, in neurocysticercosis, the specific IgG antibody in CSF was a local product of intracranial synthesis.
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A coiled nematode, which was removed surgically from a Thai woman, was consulted to the authors in July 1987. She was known to suffer from meningoencephalitis since she was in Thailand. Numerous eosinophils were detected from her CSF.
The worm was 12.3 mm long and 0.9 mm wide. It had a head bulb beset with eight rows of spines, a cervical constriction, esophagus, cervical sacs, dark intestine and testis. Cuticle of anterior half of the worm was covered with numerous spines. The spines at anterior part was stout and had 3-4 tips, but they became slender, shorter, single tipped and sparser and finally they disappeared posteriorly.
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A pathogenic free-living amoeba, Naegleria fowleri, is a causative protozoan parasite of primary amebic meningoencephalitis in human and experimental animals. It is known that humoral and cellular immunity contribute as the defence mechanism of host against this organism. Recently splenectomy has been argued on its effect on host defence mechanisms. The present study was aimed to observe the effect of immunization in splenectomized mice. For immunization, 5-10 x 10(5) trophozoites of Naegleria fowleri o 359 were intraperitoneally inoculated once a week for two weeks to BALB/c mice, and 5-10 x 10(4) of ameba trophozoites were intranasally inoculated for infection after splenectomy and/or immunization. ELISA technique was applied for the detection of serum IgG antibody levels. Experimental animals were divided into 4 groups; I. splenectomized and immunized; II. splenectomized only; III. immunized only; IV. not splenectomized nor immunized. The results obtained were as follows: Mortality rates of splenectomized and immunized mice in group I (38.1 percent) and immurized only in group III (25.0 percent) were lower than those of not immunized mice in group II(50 percent) and control group, IV (46.4 percent). Survival times of mice in group I, II, III and IV were 20.1+/-3.6, l7.3+/-4.5, 20.4+/-7.0 and 19. 6+/-7.6 days respectively, and there were no significant differences between them. ELISA values (absorbance at 492 nm) of group I (1.10+/-0.29) and group III (1.31+/-0.28) were signficantly higher than that of group IV(0.24+/-0.37) at day 31 of infection (p<0.05). Conclusively, it is presumed that humoral immunity against N. flowleri may operate as ever, after immunization, even though the mouse was splenectomized.
To observe the clinical course and intestinal histopathology in heavy infection of Fibricola seoulensis, an experimental study was performed in mice. Clinical, hematological and histopathological observation was done on 1, 3, 7 and 12 days after experimental infection with l,000 metacercariae.
On the 11th day after infection, the mice began to die and all of the infected mice were dead by the 16th day. The infected mice showed gradual weight loss. Occult blood was detected after the 10th day. Diarrhea occurred after the 9th day and was recognized in all of the infected mice on the 12th day. Hemoglobin and mean corpuscular hemoglobin decreased significantly after the 12th day, and mean corpuscular hemoglobin concentration decreased in all infected mice. The histopathological changes were more marked in the duodenum than in the jejunum or ileum. Major changes were villous atrophy and crypt hyperplasia, with decreased villus/crypt ratio, inflammatory cell infiltration and stromal edema. The present results suggest that the cause of death of mice heavily infected with F. seoulensis should be malnutrition and severe fluid loss due to malabsorption, together with intestinal bleeding.
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A human case of Centrocestus armatus (Heterophyidae) infection was proved by identifying an adult worm collected after treatment with praziquantel in Korea. The case is 42-year old man who resides in a rural area in Sanchung-gun, Kyeongsangnam-do. The case was concomitantly infected with Clonorchis sinensis and had the history of eating raw freshwater fishes including Zacco platypus, which are known to be the second intermediate host of C. armatus in Korea..
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Intestinal pathologic findings at early stage infection by Centrocestus armatus in albino rats S J Hong, J H Han, C K Park, S Y Kang The Korean Journal of Parasitology.1997; 35(2): 135. CrossRef
The infestation states and changing patterns of human infecting metacercariae in freshwater fish in Kyongsang-do and Kyonggi-do, Korea H J Rim, K H Kim, K H Joo, S J Kim, K S Eom, M S Chung The Korean Journal of Parasitology.1996; 34(2): 95. CrossRef
Infection status with the metacercariae of heterophyid flukes in the brackish water fish from Haenam-gun, Chollanam-do, Korea W M Sohn, G G Han, W G Kho, J Y Chai, S H Lee The Korean Journal of Parasitology.1994; 32(3): 163. CrossRef
Worm recovery rate and small intestinal lesions of albino rats coinfected with Fibricola seoulensis and Metagonimus yokogawai S J Hong, H C Woo, S Y Lee, J H Ahn, C K Park, J Y Chai, S H Lee The Korean Journal of Parasitology.1993; 31(2): 109. CrossRef
Growth and development of Metorchis orientalis in chicks and its adult morphology W M Sohn, J Y Chai, S H Lee The Korean Journal of Parasitology.1992; 30(4): 237. CrossRef
Trematode infections in the small intestine of Egretta alba modesta in Kangwon-do Y S Ryang, Y K Ahn, M B Yoon The Korean Journal of Parasitology.1991; 29(3): 227. CrossRef
A numerical taxonomic study on heterophyid trematodes K H Kim, Y M Yoon, J S Lee, H J Rim The Korean Journal of Parasitology.1991; 29(1): 55. CrossRef
Intestinal trematodes of humans in Korea: Metagonimus, heterophyids and echinostomes J Y Chai, S H Lee The Korean Journal of Parasitology.1990; 28(Suppl): s103. CrossRef
Study on Centrocestus armatus in Korea. II. Recovery rate, growth and development of worms in albino rats S J Hong, H C Woo, J Y Chai, S W Chung, S H Lee, B S Seo The Korean Journal of Parasitology.1989; 27(1): 47. CrossRef
Identification of Stictodora lari (Heterophyidae) metacercariae encysted in the brackish water fish, Acanthogobius flavimanus J Y Chai, S K Park, S J Hong, M H Choi, S H Lee The Korean Journal of Parasitology.1989; 27(4): 253. CrossRef
Study on Centrocestus armatus in Korea. I. Infection status of Zacco platypus and Z. temminckii with the metacercariae of C. armatus S J Hong, H C Woo, I T Kim The Korean Journal of Parasitology.1989; 27(1): 41. CrossRef
A human case of Echinostoma cinetorchis infection was found in Seoul Paik Hospital on August 1987. Large trematode eggs, 98.9 x 62.7 micro-m in average size, were detected in stool examination. The eggs had a small-sized operculum and abopercular wrinkling. After treatment with praziquantel(single dose of 16.2 mg/kg) and purgation with magnesium citrate, an adult fluke was collected. It was 8.0 mm long, equipped with 37 collar spines around head crown, and had only one testis just behind the Mehlis' gland. It was identified as E. cinetorchis Ando et Ozaki, 1923. The patient is an 18-year old man residing in Seoul, and was hospitalized due to nephritis. He had eaten raw meat juice of fresh water fishes such as top minnows(Oryzias latipes) and loaches, or tadpoles, which are considered possible souce of this fluke infection. This is the 4th human case of E. cinetorchis infection in Korea.
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A group of metacercariae encysted in the flesh of Mugil sp.
were identified to be Stellantchasmus falcatus by the morphology of adult worms obtained experimentally. It is confirmed that mullets serve as a second intermediate host of this heterophyid fluke in Korea.
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Intestinal trematode infections in the villagers in Koje-myon, Kochang-gun, Kyongsangnam-do, Korea W Y Son, S Huh, S U Lee, H C Woo, S J Hong The Korean Journal of Parasitology.1994; 32(3): 149. CrossRef
Infection status with the metacercariae of heterophyid flukes in the brackish water fish from Haenam-gun, Chollanam-do, Korea W M Sohn, G G Han, W G Kho, J Y Chai, S H Lee The Korean Journal of Parasitology.1994; 32(3): 163. CrossRef
Stictodora fuscatum (Heterophyidae) metacercariae encysted in gobies, Acanthogobius flavimanus W M Sohn, J Y Chai, S H Lee The Korean Journal of Parasitology.1994; 32(3): 143. CrossRef
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