• Parasites, Hosts and Diseases
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• v.34 no.2
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• pp.143-150
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• 1996

This study aimed to investigate the incidence of the canine ear dermatoses caused by mitts and the relativity of the causative mites of canine dermatoses to the pruritic dermatoses of the families possessing the pet dogs. Total 970 samples were collected from the lesional hairs and scales of the ear of pet dogs referred to Chung-Woon animal clinic in Seoul from January, 1990 to December, 1995. The mites were collected from the samples by means of the washing method . Presence of pruritic dermatoses in the families possessing the pet dog was evaluated. Among 2,147 mites collected from 970 samples, 2,117 specimens were Octonectes cwnotis and others were Scrcoptes conis (30 mites). O. cwnotis were found in 382 samples out of total 970 samples (39.4%) and S. cams were found in 3 samples (0.3%). Although two families out of 382 families that possessed the diseased pet dog by O. cwnotis had the family histories of pruritic dermatoses, their pruritic dermatoses were not related to the infestation by O. cwnotis. In conclusion, O. cwnotis, the most common canine mite producing pruritic ear dematoses, does not cause pruritic dermatoses in man.

• Korean Journal of Veterinary Research
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• v.23 no.2
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• pp.193-198
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• 1983

A servey on bovine fascioliasis in 52,876 cattle of Euiseong, Andong, Yecheon, Wolseong areas in Gyeongbug Province was carried out by the intradermal test, and the clinical side action of the positive cattle administered with DS-6 intramuscularly was observed. In addition pathological examination of 2 cattle died with side action of DS-6 was also conducted. The results of the studies are summarized as follows; 1. The average infestation rate of bovine fascioliasis was 31.1% and regional infestation rates were 35.1% in Eiseong, 34.5% in Yecheon, 32.2% in Andong, 26.9% in Wolseong, respectively. 2. The side actions were occurred in 1.5%(115/7,667) cf cattle administered with DS-6 and the clinical observations were salivation, dyspnea, hyperamia of conjunctiva, lacrimation, perspiration, urticaria, tremor, diarrhea, staggering, convulsion, edema and abortion. 3. Within 1 hour after the injection, side actions were occurred in 61.7% of the 115 cattle while they were observed in 37.4% of the 115 catte from 1 hour to 2 hours post injection. 4. The duration of the side action was less than 2 hours in 29.5%, 2 to 10 hours in 47.0% and more than 10 hours in 23.5% of the 115 cattle. 5. Autopsy findings and histopathological observations indicate that the death of cattle is caused by anaphylactic shock.

• Parasites, Hosts and Diseases
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• v.61 no.4
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• pp.439-448
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• 2023

Tick infestation causes a significant threat to human and animal health, requiring effective immunological control methods. This study aimed to investigate the potential of recombinant Haemaphysalis longicornis enolase protein for tick vaccine development. The exact mechanism of the recently identified enolase protein from the H. longicornis Jeju strain remains poorly understood. Enolase plays a crucial role in glycolysis, the metabolic process that converts glucose into energy, and is essential for the motility, adhesion, invasion, growth, and differentiation of ticks. In this study, mice were immunized with recombinant enolase, and polyclonal antibodies were generated. Western blot analysis confirmed the specific recognition of enolase by the antiserum. The effects of immunization on tick feeding and attachment were assessed. Adult ticks attached to the recombinant enolase-immunized mice demonstrated longer attachment time, increased bloodsucking abilities, and lower engorgement weight than the controls. The nymphs and larvae had a reduced attachment rate and low engorgement rate compared to the controls. Mice immunized with recombinant enolase expressed in Escherichia coli displayed 90% efficacy in preventing tick infestation. The glycolytic nature of enolase and its involvement in crucial physiological processes makes it an attractive target for disrupting tick survival and disease transmission. Polyclonal antibodies recognize enolase and significantly reduce attachment rates, tick feeding, and engorgement. Our findings indicate that recombinant enolase may be a valuable vaccine candidate for H. longicornis infection in experimental murine model.

• Journal of agricultural medicine and community health
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• v.13 no.1
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• pp.26-31
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• 1988

An epidemiological study was undertaken to evaluate the prevalence of E. vermicularis infestation among children in primary schools and orphanages. A total of 2,966 children in primary schools and orphanages was examined for F. vermicularis by means of cellotape anal swab technique. The purpose of the present studies is to determine the prevalence of enterobiasis among children and to make a comparison with the rate of infestation by survey areas. The result could be summarized as follows : 1) The egg positive rate of cellotape anal swab method was 16.3% out of 2,966 children. 2) The egg positive rate of urban area was 6.9% out of 1,144 children and the egg positive rate of rural area was significantly higher than that of urban area. 3) The egg positive rate of boys and girls were 15.7% out of 1,528 children and 16.9% out of 1,438 children. 4) The egg positive rate of primary schools, orphanages and mental retardation child group was 11.3% (out of 2,412), 32.7% (out of 416) and 55.1% (out of 138) respectively. There was noted a tendency of decrease in prevalence by increase of the age.

• Parasites, Hosts and Diseases
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• v.32 no.4
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• pp.275-276
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• 1994

We examined the infestation rate of head and/or body lice in patients in a mental hospital, Seoul, Korea on June 27-28, 1988. Of 438 women, 146 (33.3%) were positive with nits or worms of louse. Of 143 men, 22 (15.4%) were positive with those of louse . Regular control programs were necessary to this hospital.

• Fisheries and Aquatic Sciences
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• v.20 no.1
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• pp.1.1-1.7
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• 2017

A survey was conducted to investigate the presence of epiphytic organisms in four kelp Saccharina japonica farms in the coastal area of Korea from 2014 to 2015. Of 740 kelp samples that were taken, 208 exhibited six kinds of epiphytic organisms, including hydroid (detection rate: 11.6%), bryozoan (6.4%), polychaete (3.4%), algae (3.2%), caprellid (3%), and oyster (0.5%). The infestation rate for hydroid, bryozoan, and polychaete was significantly higher in the Wando farm, Busan farm, and Pohang farm, respectively. Epiphytic organisms were generally observed during May to September and not January to April, indicating that their infestation was significantly higher when the water had a higher temperature. The histopathogical examination revealed that hydroid and bryozoan organisms were attached on the cuticula of the thallus while some algae were attached on the cuticula of the thallus or had penetrated the epidermis. These results indicate that hydroid and bryozoan were the most predominant epiphytic organisms in Korean kelp farms, even though the infested thallus had not been broken.

• Journal of agricultural medicine and community health
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• v.3 no.1
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• pp.18-26
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• 1978

Enterobius vermicularis (pinworm) infestation in present day Korea has become one of nationwide problems. But, the incidence of pinworm infestation having been reported by many workers was almostly the data for specific groups. The incidence of pinworm infestation for 208 families of 760(male; 30, female;420) middle class inhabitant of Seoul, 238 subrural inhabitants in Gyeonggi Province and 150(male;77, female;73) rural primary students in three different districts were examined by modified Gralam's scotch-tape swab method. The results are summarized as follows; 1. The incidence of nationwide infestation a. The nationwide incidence of pinworm infestation of the 1,148 specimens examined was 28.7% (male; 27.5%, female; 29.6%). b. The highest incidence was found among 5-14 years of age. c. In comparison of the incidence by the area, the highest incidence was found among subrural area, next among rural area and the lowest among urban area. 2, Urban area a. The incidence of the 760 inhabitants examined was 23.2% (male; 24.1%, female; 22. 3%). b. The incidence of the parents group was 12.2% and children group was 30. 30.3%. c. In the parents who hold one or more pinworm poitive cases among children, the incidence of father group was 13.2% and mother group was 29.7%.3. Subrural area a. The incidence of the 238 inhabitants examined was 42.9% (male, 40.8%, female; 44.4%). b. The cumulative positive rate of anal swabs showed increasing tendency. c. Worm collection rates after chemotherapy of 98 inhabitants were 54, 0%. d. In scotch tape anal swab only one times, diagnostic value was 74.0%. e. Mother group infested with pinworm seemed to play an important role for the high incidence in individual family. f. In comparison of the incidence by the examination method, the highest incidence was found among scotch tape method. 4. Rural area The incidence of the 150 primary students examined was 34. 5% (male ; 24. 7%, female; 43.8%).

• Journal of agricultural medicine and community health
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• v.4 no.1
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• pp.71-80
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• 1979

Paragonimiasis is a common trematodiasis of medical importance and one of public health problems in many areas of sob thern part of Korea. During the last sixty years, several on the prevalence among the Korean population have been carried out by various investigators, although the general distribution and prevalences of paragonimiasis are now yet clearly determind. This study was undertaken to evaluate the status of human paragonimiasis in Kang Hwa Gun, Kyung gi Province, Korea by the use of intradermal screening test whih Veronal buffered saline antigen. A total number of 208 residents (male 119, female 89) of all age group in Kilgeong-Ri, Yangdo Myun, Kang Hwa Gun were examined by the intradermal test with paragonimus antigen. The infestation rate of crayfish with Paragonimus metacerearia was also examine in Konneung and Jeoungha village, Kilgeong-Ri from March 1973 to October 1978 by the interval of two to five years. 1. In the resnlt of 208 residents, Kilgeong-Ri, the positive rate showed in 29.3% in as a whole(36.1% in male, 20.2% in female). The highest positive rate showed in 10 to 19 age group(41.5%). 2. Among the residents in Kilgeong-Ri, Paragonimus eggs were detected in 11 residents by the sputum and the stool examinations without the intradermal test result. 3. The infestation rate of crayfish with Paragonimus inetacercaria was 90.6%(116 out of 128 crayfishes) in Konneung village, and 61.5%(24 out of 39) crayfishes) in Jeongha village, Kilgeng-Ri. 4. The fluctation of the infestation tate and density of crayfish with Paragonimus metacercaria was decreased by the interval of two to five years in Konneung and Jeongha village in Kilgeong-Ri.

• Parasites, Hosts and Diseases
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• v.46 no.4
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• pp.273-278
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• 2008

Mites in the genus Chorioptes cause a mild form of skin disease in both domestic and wild ruminants. In July 2006, dermatitis characterized by alopecia, marked lichenification, accumulation of crust, and fissuring was recognized in 14 out of 200 Holstein dairy cattle raised in the cattle farm of the National Institute of Animal Science in Cheonan, Republic of Korea. Skin lesions were distributed mainly over the tail base, and sacral and perineal regions. Microscopic examinations of skin scraping samples from severely affected areas revealed numerous mites of all developmental stages. Morphologically, pedicels of the mites were short and unjointed. The tarsal suckers occurred on the pedicels of all the legs in the male worm and on the first, second, and fourth pair of legs in the adult female worm. A single long seta at the tarsus of legs III and the length of legs II being about twice as long as legs IV in adult male mites were observed. Arising anterior to the inner-most spatulate seta was a short seta with an average of $26.4{\pm}5.8{\mu}m$ in length. Also, the length of setae #4 on the opisthosomal lobes was relatively short. Based on these observations, the mites were identified as Choriptes texanus. Although the chorioptic mange may not influence the mortality rate in the affected farm, reports indicate that a decline in milk production can be observed. This is the first report of chorioptic infestation in a cattle farm from Korea.

• Parasites, Hosts and Diseases
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• v.34 no.2
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• pp.95-106
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• 1996

The infestation rates and abundances of human infecting metacercariae (Clonorchis sinensis, Metcgonimus spry. , Centrocestus crmatus, Echinostoma hortense, Echinochusnus japonicw, Clinostomum complanctum) in freshwater fish were investigated at the three river areas - Taewhagang (river), Hyongsangang (river), Nakdonggang (river) - in Kyongsang-do and at four streams - Yonpungchon, Munsanchon, Kyonganchon, and Konjiamchon- in Kyonggi-do, Korea in 1994-1995. The fish caught at Taewhagang were heavily infested with metacercariae of Clonorchis sinensis and Centrocestw armctus. At Hyongsangang, Zncco platypus and Z. temmincki were moderately infested with metacercariae of C. crmctus. Chomanpo, at the basin of Nakdonggang, was still endemic for C. sinensis. In the fish caught at four streams of Kyonggi-do, metacercariae of C. sinensis exhibited the highest infestation rate and intensity out of 6 species of metacercariae. The infestation intensity of C. sinensis metacercariae in fish flesh was markedly different according to each division of flesh. The cause of this difference was conjectured as a result of larval behavior. The metacercariae of C. omnt5 were found in almost all parts, except scales and fins, of fish. The infestation rates and intensities of C. sinensis and C. armntus metacercariae in Taewhagang greatly increased as compared with those of previous reports . RhinoBobius bmnneus and Aconthorhone5 macropterus are newly recorded intermediate hosts of Echinostonn hortense. The reason of large differences from previous data was discussed and the standard method of metacercaria examination was proposed.