Prevalence of Anaplasma sp. in Thrushes (Family Turdidae) in Jeju Island, Republic of Korea

제주도와 마라도내 지빠귀과 조류에서 Anaplasma spp. 감염 조사

  • Oh, Mi-Rae (College of Veterinary Medicine, Jeju National University) ;
  • Moon, Kyoung-Ha (College of Veterinary Medicine, Jeju National University) ;
  • Kim, So-Yeon (College of Veterinary Medicine, Jeju National University) ;
  • Kim, Yun-Gi (College of Veterinary Medicine, Jeju National University) ;
  • Choi, Chang-Yong (Research Institute for Agriculture and Life Sciences, Seoul National University) ;
  • Kang, Chang-Wan (Jeju Wildlife Research Center) ;
  • Kim, Hwa-Jung (National Institute of Biological Resources) ;
  • Lee, Kyoung-Kap (College of Veterinary Medicine, Jeju National University) ;
  • Yun, Young-Min (College of Veterinary Medicine, Jeju National University)
  • Accepted : 2014.06.18
  • Published : 2014.06.30

Abstract

Anaplasmosis is a rickettsial zoonosis mediated by blood-sucking arthropods, such as ticks, flies, and mosquitos. Migratory birds are common hosts of ticks that are mediators of anaplasmosis, in particular, the tick infection rate in thrushes (family Turdidae) has been known to be high. The main purpose of this study is to survey the occurrence and prevalence of Anaplasma spp. from the migratory thrushes in Jeju island. We collected blood samples from 6 thrushes rescued at the Jeju Wildlife Rescue Center and from 34 wild-caught thrushes on Mara island which is a satellite island of Jeju. As a result, the nested PCR confirmed that seven out of 40 individuals (17.5%) were infected by Anaplasma spp. and all of them were identified as A. phagocytophilum based on sequences obtained from partial 16S rRNA. All the infected birds were on their northward migration in spring, our results suggest that the Turdidae family, which is a common and abundant migrant group passing through Jeju island, may act a role as active reservoir and disperser of A. phagocytophilum causing potential influx of the zoonotic pathogens from its wintering grounds in lower latitude to the mainland Korea as well as Jeju.

Anaplasmosis 은 흡혈성 절지동물인 진드기, 이파리, 모기 등에 의해 매개되는 리케차성 인수공통 전염병이다. 철새는 anaplasmosis의 매개체인 진드기의 숙주이다. 제주도의 다양한 철새 분류군 중에서 지빠귀과 조류의 진드기 감염률이 높다. 특히 마라도는 봄철 남방구에서 북방구로 이동하는 철새의 중간기착점으로 지리적으로 중요한 위치에 있다. 따라서 본 연구에서는 제주도의 대표적 이동철새인 지빠귀과 새들의 Anaplasma spp. 감염여부를 조사하였다. 우리는 마라도에서 34마리의 혈액과 제주야생동물구조센터에서 구조 채취된 6개의 혈액 시료를 대상으로 하였다. 그 결과, 40개체의 지빠귀 중 7개체가 감염이 확인되었으며, 감염률은 17.5%로 나타났다. 7개체 모두 Anaplasma phagocytophilum으로 동정되었다. 이러한 결과는 제주도를 통과하는 대표적인 철새인 지빠귀과 새들이 A. phagocytophilum을 육지로 전파할 수 있음을 시사하며, 다른 이동성 철새들간의 질병전파의 보균자로 작용할 수 있기에 철새, 텃새 및 가축으로의 전파여부를 지속적으로 모니터링할 필요가 있다.

Keywords

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