• Journal of Veterinary Clinics
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• v.37 no.2
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• pp.96-99
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• 2020

An 11-year-old female Yorkshire terrier presented with alopecia, hyperpigmentation, and pruritus. Dermatological examination revealed a large number of Demodex mites including D. cornei and D. canis. Mean length of total body length of D. cornei was one third shorter than that of D. canis. In addition, sequential analysis of DNA extracted from the skin lesions showed a 97% and 99% identity with the two sequences of D. canis and D. cornei. This is the first report of a combined infestation of D. cornei and D. canis in Korea, along with its morphological and molecular characterization.

• Korean Journal of Veterinary Research
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• v.35 no.4
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• pp.843-851
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• 1995

To observe the effect of Demodex canis infection on the cellular immune response and hematological profile, 8 Doberman pinschers experimentally infected with D cains and 4 uninfected control dogs were sensitized with 2, 4-dinitro-chlorobenzene(DNCB) on the skin and were challenged with DNCB 14 days after the initial sensitization to elicit allergic contact dermatitis. Histological and hematological changes of these dogs were then observed. Macroscopic changes of skin challenged with DNCB in D canis-infected dogs included significantly reduced area of allergic reaction(p<0.05) than in uninfected control group. Infiltration of inflammatory cells in the D canis-infected group was also significantly reduced(p<0.05) than in the uninfected control group. These changes indicated that the cell-mediated immune response of the animals was suppressed by the infection with D canis. Total white blood cell count in dogs infected with D canis was increased when dogs were sensitized with DNCB (p<0.01). The result appeared to be caused by stress due to D canis infection, secondary bacterial infection and decreased efficacy of general body defense system. Blood eosionophils were increased in D canis-infected dogs which appreared to be caused by the allergic contact dermatitis. Blood chemistry analysis revealed that total protein and globulin were increased(p<0.05), while albumin level was decreased. This result appeared to be caused by secondary bacterial infection.

• Parasites, Hosts and Diseases
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• v.46 no.1
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• pp.23-27
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• 2008

This study was designed to investigate the incidence of ectoparasite infestation among stray dogs in Gwang-ju City, Republic of Korea. A total of 103 stray dogs collected in the Animal Shelter of Gwang-ju City from November 2003 to August 2005 were investigated in this study. Ectoparasites of one or more genera were detected in 45.6% (47 /103) of the dogs examined for dermatologic lesions and/or skin scrapings (from 3-5 affected areas). Otodectes cynotis was found to be the most frequent parasite (22.3%, 23 / 103), followed by Sarcoptes scabiei var canis (19.4%, 20 / 103), Ctenocephalides canis (6.8%, 7 / 103), Demodex canis (4.9%, 5 / 103), and Trichodectes canis (1.0%, 1 / 103). Monospecific infestation was found in 83.0% (39 / 47) of the affected dogs, whereas concurrent infestations with 2 or more ectoparasites per animal were found in 17.0% (8 / 47) of the affected dogs. Trichodectes canis is reported for the first time in the Republic of Korea. Dogs less than 1 yr old were more heavily infected than other age groups (66.7%), and small-sized dogs of less than 3 kg body weight were more heavily infected than larger dogs (41.7%).

• Korean Journal of Veterinary Pathology
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• v.6 no.2
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• pp.69-72
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• 2002

1. 본 질병에 대한 다른 이름; 모낭충증, demodecosis. 2.원인체; Demodex canis. 3. 병리기전; 모낭충의 감염-농포(papule)-결절(nodule)-탈모-2차 세균감염. 4. 임상증상; 탈모, 소양증. 5. 병리조직 소견; 모낭의 확대, 표피세포의 각화항진, 모낭주위, 모낭내, 혈관 주위에 림프구 침윤, 소수의 대식구, 호산구침윤. 6. 진단; Scratching, 병리조직학적 검사. 7. 감별진단; 진균감염. 8. 치료 및 예방대책; Ivermectin. (중략)

• Korean Journal of Veterinary Research
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• v.32 no.3
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• pp.407-412
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• 1992

In order to obtain basic data concerning the treatment of canine demodicosis, 8 Doberman Pinschers were infected with Demodex canis. The clinical signs, were examined after infection, and their hematological and blood chemical values were determined, along with four non-infected control dogs of same breed. The number of white blood cells, especially the number of band neutrophils was significantly higher(p<0.01) in the infected than in the non-infected control dogs. This result indicated that the first episode of secondary infection should be treated with an appropriate antibiotics based on the culture and sensitivity test. The red blood cell counts, packed cell volume, hemoglobin contents, and serum albumin levels were significantly lower (p<0.01~0.001) in the infected than in the non-infected control dogs. These results suggested that the infected dogs had an anemia due to malnutrition. Thus, the infected dogs should be on a well balanced, high protein diet.

• Korean Journal of Veterinary Research
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• v.40 no.1
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• pp.94-100
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• 2000

This study was carried out to determine the causative agent and the epidemiological features of canine dermatitis in Tae-gu, Korea from 1997 to 1998. Specimens of collected from skin lesions were examined mycologically, parasitologically and bacteriologically. In all, 70 dogs of differing ages, gender and living environment were sampled. In mycological examination during this period, pathogenic fungi were cultured from 29(41.3%) of 70 canine specimens. Dermatophytes were cultured from 15(21.4%) and Malassezia pachydermatis were 14(20.0%) of the specimens. The frequent dermatophytes isolated were Microsporum canis (12.9%). Trichophyton mentagrophytes (4.3%), T rubrum (2.9%), T raubitschekii and M gypseum (each 1.4%). There was a high proportion of positive cultures from dogs less than 1 year and over than 3 years of age, and in some long haired breeds, but there was no significant difference between the sexes, and the living environments. Although dermatophytes were more frequently isolated in spring and winter, no significant difference was detected in the seasonal distribution of the canine dermatophytosis. Out of 70 dogs, dermatitis ectoparasites(27.1%; Demodex canis 18.6% and Sarcoptes scabie 8.6%) and bacterial pyoderma(40.4%) were diagnosed. Demodex canis and Sarcoptes scabie were common canine ectoparasites, with a higher incidence in short haired breeds and in summer and winter. Bacterial pyoderma was a higher incidence in long haired breeds, and in summer. In the pathogenic agents isolated from 57 dogs(81.4%), single infection rate was 66.7%(38 dogs) and mixed infection rate was, 35.1%(19 dogs). In the majority of mixed infection cases, Gram positive cocci and Malassezia pachydermatis (in 5 cases, 8.8%), as well as ectoparasites(in 6 cases, 10.5%) were demonstrated simultaneously.

• Korean Journal of Veterinary Service
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• v.21 no.4
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• pp.391-400
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• 1998

In order to survey the prevalence of intestinal parasites in dogs, 304 fecal samples were taken from dogs in Taejon city, The prevalence and identification of intestinal parasites were determined by the fecal examinations using sheather's floating technique and sedimentation methods and then Cryptosporidium oocysts were identified by kinyoun's modified acid fast stainning method. The results were obtained as follows ; 1. Parasite eggs and oocysts were detected in 105 samples (34.5%) from 304 cases of dog feces. 2. The 11 kinds of eggs and oocysts were isolated from the feces of dog. Those were Ancylostoma caninum (12.1%, 37 dogs), Trichuris vulpis (11.5%, 35 dogs), Toxocara canis (10.2%, 31 dogs), Isospora sp (7.2%, 22 dogs), Cryptosporidium sp (3.6%, 11 dogs), Toxascaris leonine (1.9%, 6 dogs), Strongyloides sp (1.9%, 6 dogs), Taenia sp (0.6%, 2 dogs), Diphylidium caninum (0.3%, 1 dog), Spirometra sp (0.3%, 1 dog) and Clonorchis sinensis (0.3%, 1 dog). 3. It was mixed infection such as single, double, triple and quadruple, 64.8%, 25.7%, 8.6% and 0.9%, respectively. 4. In indiviually-raised 4095, the infectious late of T canis (11.4%), A Caninum(13.2%), Cryptosporidium sp (6.1%), T leontna (2.6%) were higher than those of group raised dogs. But the infectious rate of T vulpis (12.1%) in group raised dogs was higher than that of individually-raised dogs. 5. Adults of Demodex and Sarcoptes which have been found in this survey are excluded in this report.