• 대한수의학회지
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• 제35권3호
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• pp.505-513
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• 1995

Seventy wild rats were caught from Seoul city, Kyonggi, Kangwon, Honam, and yongnam provinces. All of them were in same species, Rattus norvegicus, except two R rattus from Kyonggi province. Seventy sera from wild rats were studied by immunofluorescent antibody assay for evidence of infection by spotted fever group rickettsia. The antidody prevalance was 37.14%(26/70) for spotted fever group rickettsia. The sero-prevalence rates for spotted fever group rickettsia antibody was the hightest in Kyonggi province with 55.56%(10/18), yongnam province with 50.00%(10/20), Kangwon province with 25.00%(2/8), Seoul city with 18.75%(3/16), and Honam province with 12.50%(1/8). The sero-positive rates difference between sexes were higher in female with 46.15%(12/26) than in male with 31.81%(14/44) for spotted fever group rickettsia. Twenty six of 68 Rattus norvegicus with antibody for spotted fever group rickettsia were in subadult with 50.00%(6/12), young adult with 38.89%(7/18), middle-aged adult with 35.29%(6/17), and old adult with 33.33%(7/21). No antibody was detected from R rattus.

• 대한수의학회지
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• 제35권4호
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• pp.759-767
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• 1995

One hundred twelve domestic dog sera were collected from Kyonggi, Kanngwon, Cholla, and Kyongsang province. All the sera were examined by immunofluorescence antibody test(IFAT) against scrub typhus, murine typhus and spotted fever group rickettsia infection. The antibody prevalence was 5.40%(6/112) against scrub typhus. The sero-prevalence rates of scrub typhus were 16.30%(5/31) in Cholla and 5.90%(1/17)in Kyonggi areas. The prevalence of scrub typhus was higher in older dogs that were 6 years or more. The antibody prevalence was 8.04%(9/112) against murine typhus. The sero-positive rates to murine typhus were 5.88%(1/17) in Kyonggi, 8.33%(2/24) in Kangwon, 9.68%(3/31) in Cholla, and 7.50%(3/40) in Kyongsang areas, respectively. The sero-positive dogs to murine typhus were widely distributed throughout all age groups from 2 months to above 9 years old. The antibody prevalence was 16.96%(19/112) for spotted fever group rickettsial infection. The sero-positive rates of spotted fever group rickettsia were 11.76%(2/17) in Kyonggi, 12.90%(4/31) in Cholla, and 32.50%(13/40) in Kyongsang areas. The sero-positive dogs to spotted fever group rickettsia were observed at all age groups of dog. The sero-positive prevalence between sex showed higher in female than in male except for spotted fever group rickettsia infection.

• Parasites, Hosts and Diseases
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• 제58권1호
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• pp.37-46
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• 2020

Livestock husbandry is vital to economy of the Tarim Basin, Xinjiang Autonomous Region, China. However, there have been few surveys of the distribution of ixodid ticks (Acari: Ixodidae) and tick-borne pathogens affecting domestic animals at these locations. In this study, 3,916 adult ixodid ticks infesting domestic animals were collected from 23 sampling sites during 2012-2016. Ticks were identified to species based on morphology, and the identification was confirmed based on mitochondrial 16S and 12S rRNA sequences. Ten tick species belonging to 4 genera were identified, including Rhipicephalus turanicus, Hyalomma anatolicum, Rh. bursa, H. asiaticum asiaticum, and Rh. sanguineus. DNA sequences of Rickettsia spp. (spotted fever group) and Anaplasma spp. were detected in these ticks. Phylogenetic analyses revealed possible existence of undescribed Babesia spp. and Borrelia spp. This study illustrates potential threat to domestic animals and humans from tick-borne pathogens.

• Parasites, Hosts and Diseases
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• 제57권2호
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• pp.161-166
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• 2019

This study was done to characterize distribution of Rickettsia spp. in ticks in the northwestern and southwestern provinces in the Republic of Korea. A total of 2,814 ticks were collected between May and September 2009. After pooling, 284 tick DNA samples were screened for a gene of Rickettsia-specific 17-kDa protein using nested PCR (nPCR), and produced 88 nPCR positive samples. Of these positives, 75% contained 190-kDa outer membrane protein gene (ompA), 50% 120-kDa outer membrane protein gene (ompB), and 64.7% gene D (sca4). The nPCR products of ompA, ompB, and sca4 genes revealed close relatedness to Rickettsia japonica, R. heilongjiangensis, and R. monacensis. Most Rickettsia species were detected in Haemaphysalis longicornis. This tick was found a dominant vector of rickettsiae in the study regions in the Republic of Korea.