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1.  Serological Survey of Rickettsia japonica Infection in Dogs and Cats in Japan▿  
Clinical and Vaccine Immunology : CVI  2007;14(11):1526-1528.
Antibodies against Rickettsia japonica in 20 of 1,207 dogs and 5 of 584 cats in Japan were detected using immunofluorescence. Some antibody-positive animals were detected in Niigata and Kagawa Prefectures, areas in which Japanese spotted fever in human patients has never been identified. Some animals were positive for antibodies against other new Rickettsia species.
PMCID: PMC2168167  PMID: 17913859
2.  Detection of Ehrlichial DNA in Haemaphysalis Ticks Recovered from Dogs in Japan That Is Closely Related to a Novel Ehrlichia sp. Found in Cattle Ticks from Tibet, Thailand, and Africa 
Journal of Clinical Microbiology  2004;42(3):1353-1355.
Tick DNA samples from dogs in Japan were examined for Ehrlichia infection by 16S rRNA gene-based PCR and sequencing. Three positive samples were detected from Haemaphysalis ticks, and higher levels of similarity (98.46 to 99.06%) were found to recently detected Ehrlichia spp. from cattle ticks in Tibet, Thailand, and Africa.
PMCID: PMC356832  PMID: 15004117
3.  Epidemiological Survey of Babesia Species in Japan Performed with Specimens from Ticks Collected from Dogs and Detection of New Babesia DNA Closely Related to Babesia odocoilei and Babesia divergens DNA 
Journal of Clinical Microbiology  2003;41(8):3494-3498.
Detection and analysis of Babesia species from ticks recovered from dogs in Japan were attempted by PCR and nucleotide sequence analysis based on the 18S rRNA gene, respectively. A total of 1,136 ticks were examined for Babesia DNA by 18S rRNA-based PCR and nucleotide sequencing. Partial sequences of Babesia canis vogeli DNA were detected from six ticks in Aomori, Nara, Hiroshima, Oita, and Okinawa Prefectures; and Babesia gibsoni Asia-1 DNA was also detected in four ticks in Osaka, Hiroshima, Miyazaki, and Okinawa Prefectures. Unique sequences of 1,678 bp were also obtained from Ixodes ovatus ticks in Akita and Fukui Prefectures. The sequences were similar to those of Babesia odocoilei (97.7%) and Babesia divergens (97.6%). This is the first report of the detection of DNA belonging to this group in Japan.
PMCID: PMC179768  PMID: 12904344

Results 1-3 (3)