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http://dx.doi.org/10.3347/kjp.2018.56.6.559

Molecular Detection and Phylogenetic Analysis of Anaplasma phagocytophilum in Horses in Korea  

Seo, Min-Goo (College of Veterinary Medicine, Kyungpook National University)
Ouh, In-Ohk (Animal and Plant Quarantine Agency)
Choi, Eunsang (Mari Equine Clinic)
Kwon, Oh-Deog (College of Veterinary Medicine, Kyungpook National University)
Kwak, Dongmi (College of Veterinary Medicine, Kyungpook National University)
Publication Information
Parasites, Hosts and Diseases / v.56, no.6, 2018 , pp. 559-565 More about this Journal
Abstract
The identification and characterization of pathogenic and zoonotic tick-borne diseases like granulocytic anaplasmosis are essential for developing effective control programs. The differential diagnosis of pathogenic Anaplasma phagocytophilum and non-pathogenic A. phagocytophilum-like Anaplasma spp. is important for implementing effective treatment from control programs. The objective of the present study was to investigate the prevalence of Anaplasma spp. in horses in Korea by nucleotide sequencing and restriction enzyme fragment length polymorphism assay. Of the 627 horses included in the study, only 1 (0.2%) was infected with A. phagocytophilum. Co-infection with A. phagocytophilumlike Anaplasma spp. was not detected in the study. The 16S rRNA sequence of A. phagocytophilum was similar (99.5-100%) to A. phagocytophilum 16S rRNA isolated from horses in other countries. PCR adapted to amplify A. phagocytophilum groEL and msp2 genes failed to generate amplicons, suggesting genetic diversity in these genes. This study is the first molecular detection of A. phagocytophilum in horses in Korea. Human granulocytic anaplasmosis and animal infection of A. phagocytophilum have been reported in Korea recently. Because of vector tick distribution, global warming, and the increase of the horse industry, horses should be considered as a potential reservoir for A. phagocytophilum, and cross infectivity should be evaluated even though a low prevalence of infection was detected in this study. Furthermore, continuous surveillance and effective control measures for A. phagocytophilum should be established to prevent disease distribution and possible transmission to humans.
Keywords
Anaplasma phagocytophilum; equine; granulocyte; phylogeny; restriction fragment length polymorphism;
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