To establish an animal model of intracranial sparganosis, the fate and behavior of the experimentally inoculated spargana were observed. A total of 102 scolices of spargana were injected into 22 cat brains, and the cats were sacrificed at 2 weeks, 1 month, 3 months and 6 months after the inoculation. Neurosparganosis was established in 77% of the cats. Of 43 recovered worms, 19 (44%) were located in the subdural or subarachnoid space, 16 (37%) in the brain parenchyme, and 2 (5%) in the lateral ventricle. One was detected at the diploic space of the skull and 5 were outside the cranial cavity. All but one were alive, and had grown tails. They were distributed in the brain parenchyme randomly. There was no place which they could not invade. No adult was found in the intestine. Cerebrospinal fluid (CSF) was collected before inoculation, 1 week, 2 weeks, 1 month, 3 months and 6 months after inoculation. The level of anti-sparganum IgG antibody in CSF measured by ELISA began to increase above the criteria of positivity 1 month after inoculation. Three months after inoculation, the values markedly increased. The present findings reveal that intracranial inoculation of spargana into the brains of cats would be a good animal model of experimental neurosparganosis.
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Vulva sparganosis misdiagnosed as a Bartholin's gland abscess Tae-Hee Kim, Hae-Hyeog Lee, Soo-Ho Chung, Boem-Ha Yi, Jeong-Ja Kwak, Hae-Seon Nam, Sang-Heon Cha Korean Journal of Obstetrics and Gynecology.2010; 53(8): 746. CrossRef
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In order to observe the antigenic localization in the tissues of the adult Clonorchis sinensis, immunogold labeling method was applied using serum immunoglobulins (IgG) of either worm-infected rabbits (group I) or antigen-immunized rabbits (group II) (by the body fluid obtained from the adult worms). The electron micrographs of the sectioned worm tissue antigens, embedded in Lowicryl HM 20 medium and stained with protein A-gold complex (particle size: 12 nm), were compared between the group I and group II. The gold particles were observed in the interstitial matrix of the worm parenchyma, the epithelial lamellae of the cecum, and the cecal lumen both in group I and II. But the particles were in general more concentrated in group II.
The gold particles were not observed on the basal lamina of the tegument or on vitelline glands in group I, while they were highly concentrated on those areas in group II. There were also differences in the antigenicity of interstitial matrix(reacted with group I IgG) and head part(reacted with group II IgG) of the sperm cells in the seminal receptacle.
Conclusively, it is suggested that the substances comprising the basal lamina of the tegument or vitelline glands act as specific antigens reacting with antigen(body fluid) immunized rabbit IgG. On the other hand, the substances in the cecal lumen and cecal epithelial lamellae are thought to be the specific antigen that react with the worm-infected rabbit IgG.
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Localization of worm antigen in Neodiplostomum seoulense by immuno-electronmicroscopy J C Lee, Y Kong, S U Lee, S Huh The Korean Journal of Parasitology.1997; 35(2): 95. CrossRef
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Antigenic localities in the tissues of Paragonimus westermani by developmental stages using immunogold labeling method H J Rim, S J Kim, I J Sun, J S Lee The Korean Journal of Parasitology.1992; 30(1): 1. CrossRef
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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
Antigenic localities in the tissues of Metagonimus yokogawai observed by immunogoldlabeling method H Ahn, H J Rim, S J Kim The Korean Journal of Parasitology.1991; 29(3): 245. CrossRef
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The direct wet mount examination of vaginal secretion, widely applied for the diagnosis of Trichomonas vaginalis infection in woman patients, is rapid and economical, however, the sensitivity of this technique is not so high.
In this study enzyme-linked immunosorbent assay (ELISA) was employed for the detection of serum anti-T. vaginalis IgG and IgM antibodies from 30 vaginal trichomoniasis patients and 30 non-infected healthy persons. The results were as follows: 1. Serum ELISA-IgG value was 0.37 +/- 0.134 (Mean +/- S.D.) in vaginal trichomoniasis patients and 0.21 +/- 0.054 in healthy controls (p less than 0.005), and the sensitivity and specificity of ELISA for serum IgG antibody were 70.0% and 96.7%, respectively. 2. Serum ELISA-IgM value was 0.33 +/- 0.177 (Mean +/- S.D.) in vaginal trichomoniasis patients and 0.11 +/- 0.051 in healthy controls (p less than 0.005), and the sensitivity and specificity of ELISA for serum IgM antibody were 70.0% and 96.7%, respectively. 3.
The ELISA-IgG values showed a significant correlation with ELISA-IgM values (r = 0.77, p less than 0.005). With above results, it is assumed that ELISA is a reliable method for the diagnosis of T. vaginalis infection and simultaneous measurement of serum IgG and IgM with this technique is recommended.
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Cryptosporidium, a coccidian parasite first described by Tyzzer (1907) from a laboratory mouse, has become an important human enteric pathogen causing overwhelming diarrhea especially in immunocompromised patients such as AIDS. This parasite has been reported from over 20 countries and is recognized as a cosmopolitan species. In Korea, however, there has been no report on human as well as animal cryptosporidiosis. This study was performed so as to verify the presence of Cryptosporidium in Korea by activating the parasite from laboratory mice by immunosuppression. Total 65 conventionally-bred ICR mice including a control (5 mice) and 3 experimental groups (20 each) were used for this study. Group I was immunosuppressed with prednisolone injection (1 mg IM, every other day) for 7 weeks. Group II (prednisolone injection and tetracycline administration) and Group III (prednisolone injection and trimethoprim-sulfamethoxazole administration) were prepared to observe the effect of antibacterial agents on the activation of cryptosporidiosis. In fecal examinations of mice Cryptosporidium oocysts (4-6 microns in size) were detected from 1 week after the start of immunosuppression and the mice began to die. In H-E stained tissue sections of the lower jejunum, numerous very small (2-4 microns), dense, ovoid or spherical, slightly basophilic bodies were seen attached on the free border of mucosal epithelial cells. In scanning and transmission electron microscopic observations, these organisms were identified as various developmental stages of Cryptosporidium. The species is considered to be C. parvum.(ABSTRACT TRUNCATED AT 250 WORDS)
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The life history of Echinostoma cinetorchis was completed in the laboratory using Hippeutis cantori as the first and second intermediate host. The incubation for maturation of eggs and hatching of miracidia took 24 days at 28 degrees C.
On the 66th day after miracidial challenge, 16 snails were crushed and examined for the presence of E. cinetorchis larvae. The metacercariae were detected in all of the snails, and from three of them were found the rediae and cercariae. The morphological characteristics of the larvae and the experimentally obtained adults were compatible with that of E. cinetorchis.
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Field investigations on epidemiology and control of fish-borne parasites in Korea Han-Jong Rim International Journal of Food Science and Technology.1998; 33(2): 157. CrossRef
Tegumental ultrastructure of juvenile and adult Echinostoma cinetorchis S H Lee, H S Jun, W M Sohn, J Y Chai The Korean Journal of Parasitology.1992; 30(2): 65. 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
Studies on Echinostoma spp. in the Chungju Reservoir and upper streams of the Namhan River Y S Ryang The Korean Journal of Parasitology.1990; 28(4): 221. CrossRef
Intestinal histopathological changes due to infection with Echinostoma hortense (Trematoda) were studied in rats after experimental infection with the metacercariae. The metacercariae were obtained from the tadpoles of Rana nigromaculata, a second intermediate host infected in the laboratory. Total 18 albino rats (Sprague-Dawley) were given 200 matacercariae each and sacrificed on the day 1, 3, 7, 11, 22 or 44 post-infection (PI). Segments of the small intestine at 1, 3, 5, 8 and 30 cm posterior to the pylorus (PTP) were resected and studied histopathologically. 1. The flukes were seen to have intruded into the intervillous space in the upper small intestine at early stages (1-3 days PI), however, they were located mainly in the intestinal lumen at later stages (7-44 days PI). The flukes were sucking and destroying the epithelial layers of villi with their oral and ventral suckers. 2. Histopathological changes of the intestine were recognizable in as early as 1-3 days after infection, and the changes became severer as the infection progressed. 3. The intestinal mucosa was histopathologically characterized by villous atrophy and crypt hyperplasia throughout the infection period. Major villous changes were blunting, fusion, severe destruction and loss of epithelial layers of villi. Villous/crypt (V/C) height ratio was remarkably reduced from 3:1 in controls to 1:1 in severely infected animals. In the stroma of villi, inflammatory cell infiltrations, vascular congestion, edema, and/or fibrosis were recognized. The goblet cells were increased in number after 11 days PI.(ABSTRACT TRUNCATED AT 250 WORDS)
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A review of Gymnophalloides seoi (Digenea: Gymnophallidae) and human infections in the Republic of Korea Soon-Hyung Lee, Jong-Yil Chai The Korean Journal of Parasitology.2001; 39(2): 85. CrossRef
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Field investigations on epidemiology and control of fish-borne parasites in Korea Han-Jong Rim International Journal of Food Science and Technology.1998; 33(2): 157. CrossRef
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 effect of reinfection with Neodiplostomum seoulensis on the histopathology and activities of brush border membrane bound enzymes in the rat small intestine J R Yu, S T Hong, J Y Chai, S H Lee The Korean Journal of Parasitology.1995; 33(1): 37. CrossRef
A case of echinostomiasis with ulcerative lesions in the duodenum J Y Chai, S T Hong, S H Lee, G C Lee, Y I Min The Korean Journal of Parasitology.1994; 32(3): 201. CrossRef
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
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
Studies on Echinostoma spp. in the Chungju Reservoir and upper streams of the Namhan River Y S Ryang The Korean Journal of Parasitology.1990; 28(4): 221. CrossRef
Histochemical findings of the tribocytic organ and tegument of Fibricola seoulensis S Huh, S H Lee, B S Seo The Korean Journal of Parasitology.1990; 28(3): 155. CrossRef
The growth and developmental pattern of H. continua was observed after experimental infection of their metacercariae to chicks. The recovery rate of worms from the chicks at 1 to 28 days post-infection (PI) was 12.8% in average. The rate remained fairly high for early 4 days of infection but decreased thereafter rapidly till 28 days PI. Most of the flukes, 91.9%, were recovered from the ileum of the chicks.
In metacercariae, genital organs such as the ovary, testes, seminal vesicle, seminal receptacle and genital sucker were recognizable. At one day PI Mehlis' gland appeared, and at 2 days follicular vitellaria were observed. At 3 days PI, eggs were formed in the uterine tubule and increased in number as the worm grew old. The worms reached 2,990 microns in length and 525 microns in width at 28 days PI. Genital organs developed rapidly in early stages of infection but slowly thereafter to 28 days PI, whereas non-genital organs developed steadily through the infection period. It was proved by this experiment that chicks should be a moderately suitable final host of H. continua.
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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
This study was performed to evaluate the status of intestinal parasitic infections among the inhabitants in two islands (Chu-do and Doomi-do) of Tongyeong-gun, Kyeongsangnam-do (Province), from August to September, 1989.
A total of 189 stool specimens was collected from the inhabitants of 3 villages and examined by Kato's cellophane thick smear and formalin-ether sedimentation techniques.
Stoll's dilution egg counting technique was done for the quantitative examination of helminth eggs. The overall positive rate of intestinal parasites was 30.2%. The egg positive rate of Ascaris lumbricoides was 2.1%, that of Trichuris trichiura 24.3%, hookworm 2.1%, Trichostrongylus orientalis 0.5%, Clonorchis sinensis 1.1%, heterophyid 1.6%, and Taenia species 2.6%. The cyst positive rate of Giardia lamblia was 1.6% and that of Entamoeba coli 0.5%. In T.
trichiura infection, the egg positive rate of females (29.9%) was much higher than that of males (17.2%). Among the age groups, 10-19 year group showed the highest infection rate, 32.4%. It was revealed that the prevalence of intestinal parasitic infections among the inhibitants of remote islands should be still high in comparison with ever-reported ones in urban or rural areas.
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Review of Zoonotic Parasites in Medical and Veterinary Fields in the Republic of Korea Heejeong Youn The Korean Journal of Parasitology.2009; 47(Suppl): S133. CrossRef
Second report on intestinal parasites among the patients of Seoul Paik Hospital (1984-1992) S K Lee, B M Shin, N S Chung, J Y Chai, S H Lee The Korean Journal of Parasitology.1994; 32(1): 27. CrossRef
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