A Case of Blackfly Bites / 대한피부과학회지

A 22-year-old man visited our clinic with a 1 month history of pruritic, multiple and erythematous papules with crust. At first, he was asymptomatic, but the bites subsequently became hard and developed into pruritic papules. There are many small black flying insects in the Gangwon province where he worked. He found that some of the insects had attached to the skin lesions, and so were brought to us. They were identified as blackflies, of the Simulium sp. Since there have been no reports of blackfly bite in Korea, we herein report a case of blackfly bites by Simulium sp.

Three Cases of Tick Bites by Haemaphysalis Longicornis / 대한피부과학회지

Since 1982, 31 cases of tick bites were reported in Korea and only one case of Haemaphysalis longicornis related to tick bites was included. Until now, nymph related or multiple tick(more than three) related to tick bites were not reported in the Korean literatures. We report three cases of tick bites by Haemaphysalis longicornis. The first case is a 71-year-old Korean woman who had a tick stuck on the anterior chest area. The second case is a 64-year-old Korean man who visited a clinic for pruritic, multiple, erythematous papules and nodules. The third case is 50-year-old man who visited the hospital for pruritic, erythematous nodules on calf area. Eight ticks were collected from three patients which were one female in the first case, two females in the second case and two females and three nymphs in the third case and all of them were identified as Haemaphysalis longicornis.

Tick bite by Haemaphysalis longicornis Neumann: Laboratory Observation of the Causative Tick / 대한피부과학회지

We report a case of a tick bite by Haemaphysalis longicornis Neumann. The tick was found on the left knee of a 75-year-old male and captured alive. We observed its process of laying eggs and becoming larvae after human blood sucking. Our data include the size and weight of the female tick (8.2 X 6.2mm, 138mg) after blood sucking, preoviposition period(4 day), oviposition period(21 day), number of eggs(1486) and size of unfed larva(0.40-0.44 x 0.58-0.60 mm). It had a 2n number of 22 chromosomes which showed chromosomal pattern of bisexual clones but its life cycle, especially oviposition to hatching period, showed that of pathenogenetic clones. This is the first Korean report of a tick bite by Haemaphysalis longicornis Neumann and the laboratory observation of the causative tick laying eggs and becoming larvae.

A Clinical and Histopathological Study of Experimental Canine Scabies

BACKGROUND: Canine scabies is caused by an infestation of Sarcoptes scabiei var. canis (S. canis) in dogs and they can be transmitted to humans. Recently pet raising has been increasing in Korea and various parasitic infestations contracted from them have also been increasing including canine scabies. OBJECTIVE: The purpose of this study was to examine the clinical and histopathological features of experimental canine scabies. METHODS: Two dogs experimentally infested were observed for a year. They were examined physically and the numbers of S. cans were counted from scraping samples of the ear, leg and abdomen every 3 to 7 days and skin biopsies were taken. One was given systemic corticosteroids(Dogl) and the other was observed in its natural course(Dog2). RESULTS: Dogl-Clinically severely pruritic, markedly thick hyperkeratotic scales, crust and generalized erythema on the whole body developed with huge numbers(up to 754.9/100mg from scales of the abdomen) of mites, and histopathologically showed features similar to human crusted scabies. Dog2-Clinically showed milder features than Dogl including the number of S. canis(up to 242.6/100mg from scales of the ear), but histopathologically showed similar features with Dogl. Dog2 also showed a prompt response to one topical application of 20% benzyl benzoate solution. CONCLUSIONS: 1) The number of S. canis increased markedly in both normal and corticosteroidtreated dogs, although it was more significantly increased in the corticosteroid-treated one. 2) Histopathology showed features similar to classical scabies in the early stage but features of human crusted scabies in the full-blown stage. 3) Morphologically Sarcoptes canis differs from Sarcoptes scabiei var. hominis.

A Case of Tick Bite Caused by Haemaphysalis flava / 대한피부과학회지

We report a case of tick bite caused by Haemaphysalis flava which have never been reported in Korean medical literature. An 31-year-old woman had a asymptomatic erythematous indurated plaque with central crust by tick bite on the left upper back. A excisional biopsy specimen from the skin lesion showed eosinophilic degeneration with thrombosed blood vessels and dense inflammatory cells infiltration mainly composed of eosinophils in the reticular dermis. We could identify this causative tick as Hamaphysalis flava by using the scanning electron microscopic examination.

A Case of Insect Sting by Euponera chosensis / 대한피부과학회지

Ants(Family Formicidae) are very successful organisms occuring in trernendous numbers worldwide in terrestrial habitats. All ant species may bite, and on species sting. 48 species in 26 genus have been reported in Korea, but only systemic reaction induced by the anti Brachyponera chinersis, has been reported in the Korea terature. A 48 year old man was stung on the neck, abdomen, and dorsum of the hand by flying stinging ants. He experienced moderate pain, burning and itching sensation. Clinical course and histopathologic findings of the lesions caused by the stinging ant was observed without specific treatment. The stinging ants collected from t,he patient.s skin and his house were identified as Euponera chosensis belonging to Subfamily Ponerinae. To the best of our know ledge, this is the first clinical repor of the insect sting by Euponera chosensis in the Korean literature.

Two cases of tick bites caused by ixodes nipponensis / 대한피부과학회지

No abstract available.

A Cases of Primary Cutaneous Cryptococcosis / 대한피부과학회지

A 53-year-old man developed some erythematous follicular macules accompanied with tingling sensation on both shoulders. Histologic finding showed a dense lymphocytic infiltrate around the infundibular portion of the follicle, where separation of the dermoepidermal junction was seen. The insect, obtained from the skin lesion, was identified as a larva of an Ap- hid

Morpholgical Study of Korean Pubic Louse , Phthirus pubis ( Linnaeus , 1758 ) by Light and Scanning Electron Microscopy / 대한피부과학회지

By light and scanning electron microscopy, the morphologies of Korean pubic louse(Phthirus pubis) were described and measured. Especially, electron microscopic structures of palpus, tuft organ, sensilla basiconicum and palpal lobe were reviewed in detail. The variations were obserbed in the number of dorsal setae and the setae of membranous processes of abdomen. And also, the importance of public health and epidemiological aspects was discussed.

An Ecological Study on the House Dust Mite / 대한피부과학회지

In this study, the authors attempted to investigate distribution of the house dust mites in Korea on a nationwide scale. Mites were isolated and classified from 211 house dust samples which were collected from 7 urban areas and 3 rural areas. The result were as follows: 1) Nineteen species of mites were identified in this study including 4 new species which were not recorded in Korea. 2) The most frequent house dust mites were Pyroglyphid mites. Among then, Derntatophagoides farinae was found to be dominant species in Korea since this species was more widely distributed and more frequently found than D. pteronyssinus, 3) The occurence rates of Dermatophagoides sp. in the urban areas were higher than that in the rural areas, but vice versa in the occurence rates of other mites accidently found in the dust samples.

A Study of Demodex from Eyelashes / 대한피부과학회지

Demodex is easily found from eyelashes and suggested as the one of the causes of some eye diseases. This study was to investigate the occurence rate, and classification of Demodex from eyelashes, and its relationship with blepharitis. The data of this study were compiled from 27 blepharitis patients and 173 patients without blepharitis (control group) who had visited St. Paul's Hospital from October 1981 to December 1981. Three eyelashes from each eyelid-total 12 lashes from a patient-were extracted under the slit lamp, located on a slide glass and fixed with polyvinyl lactophenol mounting medium. (countinued..)

Avian Mite Dermatitis: Observation of the Causative Mites and Clinical Findings / 대한피부과학회지

It has been well known that prutic skin diseases are very common among the chicken raisers. Authors visited three paultry farming area in Kyung Ki Province to observe the avian mite dermatitis among the workers and to collect the causative paultry mites during the period from March to September, 1982. At every paultry farming area, we chose two families to investigate every family member and to check the dermatitis correlated with the mite that we had collected from the samples of each house dust and hen-house dust. The result were summarized as follows; 1. Ornithonyssus sylviarum (Canestrini and Fanzago, 1877) was found in dust samples from two houses and two hen-houses. And Dermatophagoides species and Acarus siro (Linnaeus, 1758) were also collected from the other house and henhouse samples. 2. Three cases of avian mite dermatitis were found in one family, where O. syiviarum was collected in the dust samples from their house and hen-house.

Studies on the mites(Order Acarina) in Korea I. Suborder Sarcoptiformes

Acarid mites were isolated from samples collected in Seoul during the period of October 1975 to August 1978. Samples consisted of stored foods such as rice, flour, sugar, dried fishes, dusts of houses and freight offices. The identified mites were classified into 12 species belonging to 12 genera, 5 families as following lists, of which 4 species (*) are newly recorded in Korea. Family Acaridae Ewing and Nesbitt, 1942: Tyrophagus putrescentiae (Schrank, 1781). Acarus siro Linnaeus, 1758. Aleuroglyphus ovatus* Troupeau, 1879. Suidasia nesbitti Hughes, 1948. Rhizoglyphus echinopus (Fumouze and Robin, 1868). Caloglyphus berlesei (Michael, 1903). Lardoglyphus konoi (Sasa and Asanuma, 1951). Family Carpoglyphidae Oudemans, 1972: Carpoglyphus lactis Linnaeus, 1927. Family Glyphagidae Berlese, 1887: Glycyphagus destructor (Schrank, 1781). Gohieria fusca* (Oudemans, 1903). Family Chortoglyphidae Berlese, 1897: Chortoglyphus arcuatus* (Troupeau, 1879). Family Pyroglyphidae Cunliffe, 1958: Euroglyphus maynei* (Cooremant 1950).

A clinical trial of oxantel and pyrantel against intestinal nematodes infections

This study was conducted to determine the effect of oxantel/pyrantel tablets, oxantel suspension, pyrantel dry syrup and pyrantel tablets against T. trichiurus and A. lumbricoides infections. Twenty-four cases of mixed infections of T. trichiurus and A. lumbricoides were treated with oxantel/pyrantel tablets at a single dose of 20 mg/kg of body weight, and 49 cases of single infection of T. trichiurus were administered oxantel suspension at a single dose of 15 mg/kg of body weight. On the other hand, single infection of A. lumbricoides in 18 cases was administered pyrantel dry syrup at a single dose of 5 mg/kg of body weight. In the above 91 cases, the negative conversion rate and the egg reduction rate of egg out-put before and after the drug administration were examined by the cellophane thick smear method and Stoll's egg counting technique. A follow-up examination was carried out 3-4 weeks after the drug administration. Other 59 cases of single and mixed infection of T. trichiurus and A. lumbricoides were examined by the cellophane thick smear method only and administered pyrantel tablets at a single dose of 2.5 mg/kg of body weight. The results were summarized as follows: The prevalence rates of T. trichiurus and A. lumbricoides infection in this study were 42.8% and 27.2% respectively by the cellophane thick smear method among 1,066 stool specimens. The egg negative conversion rate and the egg reduction rate in the administration of oxantel/pyrantel tablets at a single dose of 20 mg/kg body weight were 75.0% and 97.8% respectively in T. trichiurus infection and 100% each in A. lumbricoides. The egg negative conversion rate and the egg reduction rate in the administration of oxantel suspension at a single dose of 15 mg/kg body weight were 85.7% and 93.0% respectively in sinlge infection of T. trichiurus. The egg negative conversion rate and the egg reduction rate in the administration of pyrantel dry syrup at a single dose of 5 mg/kg body weight were 100% each in single infection of A. lumbricoides. The qualitative evaluation in cases of single and mixed infection of T. trichiurus and A. lumbricoides were by means of pyrantel tablets at a single dose of 2.5 mg/kg body weight, the cure being 100% against A. lumbricoides but 17.0% against T. trichiurus. There were no undesirable side effects in this study and oxantel suspension and pyrantel dry syrup were well accepted and tolerated.

Rhabditis elongata Schneider, 1866 from students in Korea

As the result of a fecal examination performed in October 1978 on 320 middle and high school students of Hapcheon, Korea, we found 2 cases of Rhabditis nematodes in 16-year old high school girls. Rhabditis nematodes isolated from their feces were cultured at 30 C by a filter paper culture method. After careful observation of male and female adults, we confirmed them as Rhabditis elongata Schneider, 1866 on the morphological basis of the male genitalia, and the papillae and measurements of various parts of the worm bodies.

A Case of Rat Mite Dermatitis / 대한피부과학회지

We report a patient with dermatitis caused by the bite of Omithonyssus bacoti (Hirst, 1913), commonIy referred to as the tropical rat mite. The bite of this mite resulted in a severely pruritic papular eruption in our patient, 32 year old Korean housewife, and her two daughters. We found the mites on the patients skin and also on dead rats captured from the patients house. Though we think that the rat mite d.ermatitis is not infrequent disease, we are going to report the case because the people are apt to overlook the disease and it can become an occupational hazard.

A case of human thelaziasis in Seoul

Thelazia callipaeda, parasitic in the eye of 24 years old Korean male, was extracted from the left eye of the patient in Seoul, Korea. We confirmed that as T. callipeada morphologically, based on the descriptions of Hsu and other literature. We presents the 7th human thelaziasis case in Korea with the historical review of the literature.

Studies on the parasites of Korean amphibia. Trematodes of amphibians

An investigation on the trematodes of Korean amphibians was carried out during the period from April to September of 1976. A total of 883 amphibians of 6 species were examined. These frogs, toads and salamanders were collected in the areas of the Han river side. And also these amphibians comprised 775 Rana nigromaculata, 53 Rana rugosa, 21 Hyla arborea japonica, 2 Bufo bufo gargarizans, 2 Gallula tornieri and 30 Hynobius leechi. Out of the results of this work, 7 species of trematodes belonging to 2 orders were found as follows: Monogenea: Diplorchis ranae Ozaki, 1931. Digenea: Diplodiscus japonicus (Yamaguti , 1936), Gorgodera japonica Yamaguti, 1936, Haematoloechus sibiricus japonicus(Yamaguti, 1936) , Mesocoelium brevicaecum Ochi, 1929, Loxogenes liberum Seno,1980, Pleurogenoides japonicus (Yamaguti, 1936).

Indirect fluorescent antibody test for diagnosis of paragonimiasis

Indirect fluorescent antibody tests were performed with sera of paragonimiasis patients and skin test positive sera against Paragonimus antigen. Paragonimus antigen was prepared from lyophilized adult worms of P. westermani by defatting with ethyl-ether before extracting with barbital buffered saline. Preparation of Paragonimus antigen for the indirect fluorescent antibody test was based upon Sato's method used for sero-diagnosis of anisakiasis, with Sephadex G-25 instead of Sepharose 4B. The results were as follows: The indirect fluorescent antibody titers of paragonimiasis patient's sera ranged from 1:64 to 1:512, whereas the control sera showed titers of less than 1:16. As controls, Clonorchis patient's sera and parasite-free healthy human sera were used. In indirect fluorescent antibody tests, the skin test positive human sera against Paragonimus antigen showed a positive rate of 41.5 per cent in the case of titers more than 1:40. On the other hand, complement fixation tests on the same sera showed a positive rate of 32.5 per cent in the case of titers more than 1:20.

Paper electrophoretic pattern of serum protein fractions in various parasitic diseases

Electrophoretic patterns of human blood serum protein were studied in parasitic diseases including 19 cases of clonlrchiasis, 29 cases of clonorchiasis and other helminthiasis and 22 cases of healthy controls in Kim-hae area. The same study was made on 32 cases of ascariasis, 56 cases of trichocephaliasis, 80 cases of ascariasis and trichocephaliasis, 9 cases of amebiasis and 44 cases of healthy controls in the Seoul Juvenile Center. The total serum protein was performed by Folin method and the serum protein fraction test by Durrum's paper electrophoretic method. The results were as follows: In the case of clonolrchiasis, the total serum protein, albumin fraction and A/G ratio decreased and alpha (1) globulin fraction increased twice as much as in the case of healthy controls. In the case of clonorchiasis and other helminthiasis, alpha(1) globulin fractions increased. In the case of ascariasis, albumin fractions increased but alpha(1) globulin fractions decreased. In the case of ascariasis and trichocephaliasis, alpha(2) and beta globulin fractions decreased. In the case of amebiasis, alpha(1) globulin decresed.