Journal of Veterinary Clinics (한국임상수의학회지)

The Korean Society of Veterinary Clinics (한국임상수의학회)
권호 표지

An Outbreak of Chicken Histomoniasis in the Absence of Normal Vectors

매개체 부재 하에 발생한 닭의 흑두병 증례

  • Son, Hwa-Young (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University) ;
  • Kim, Nam-Soo (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University) ;
  • Ryu, Si-Yun (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University) ;
  • Shin, Hyun-Jin (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University) ;
  • Park, Min-Kyu (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University) ;
  • Kim, Hyeon-Cheol (School of Veterinary Medicine, Kangwon National University) ;
  • Cho, Jeong-Gon (College of Veterinary Medicine and Bio-Safety Research Institute, Chonbuk National University) ;
  • Park, Bae-Keun (Research Institute of Veterinary Medicine.College of Veterinary Medicine, Chungnam National University)
  • 손화영 (충남대학교 수의과대학.동물의과학연구소) ;
  • 김남수 (충남대학교 수의과대학.동물의과학연구소) ;
  • 류시윤 (충남대학교 수의과대학.동물의과학연구소) ;
  • 신현진 (충남대학교 수의과대학.동물의과학연구소) ;
  • 박민규 (충남대학교 수의과대학.동물의과학연구소) ;
  • 김현철 (강원대학교 수의과대학) ;
  • 조정곤 (전북대학교 수의과대학) ;
  • 박배근 (충남대학교 수의과대학.동물의과학연구소)
  • Published : 2009.12.31
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Abstract

Acute and massive death was noted in 10-week-old chickens, broiler breeder, housed in the floor pens. The number of dead chickens exceeded 20 birds each day. Grossly, fibrinous peritonitis with adhesion of mesenteries and intestinal organs was noted. The ceca were enlarged, expanded, and thickened with congestion. Cecal lumen was distended with a caseous core composed of serous, fibrinopurulent, and hemorrhagic exudates with desquamated masses of epithelial cells. The liver had multifocal white irregular necrotic foci surrounded by a raised ring. Light and electron microscope revealed Histomonas meleagridis in the liver with its characteristic structures and not in the intestinal mucoca and submucosa. In this case, the examination of parasite, larvae and egg was conducted more carefully; however, we could not find eggs or worms of Heterakis gallinarum in the dead or live chickens and earthworms in the soils of floor pens. Therefore, we concluded that an outbreak of blackhead disease probably occurred by direct transmission of histomonads from chickens to chickens in this case.

10 주령의 육계 종계가 급성으로 폐사 하였다. 치사율은 20 수/계사/일 이상 이었고 사육환경은 평사였다. 분변검사에서 맹장 및 장으로부터 기생충은 검출되지 않았으며, 부검 소견에서 장간막과 장조직의 유착을 동반한 섬유소성 염증이 관찰되었다. 또한, 맹장의 충 출혈을 동반한 종대, 확장 및 비후가 관찰되었으며, 맹장의 내강에서 염증성 삼출물에 의한 단단한 치즈양 core가 관찰되었다. 간의 육안소견에서는 원형의 융기된 괴사 반점이 관찰되었다. 광학 및 전자현미경을 통하여 전형적인 칠면조편모충이 간조직에서 관찰되었으나 장점막에서는 관찰되지 않았다. 한편, 본 예에서 흑두병을 매개하는 닭맹장충을 부검 및 생존한 닭에서 관찰할 수 없었으며 계사의 토양에서 지렁이를 전혀 관찰할 수 없었다. 따라서 본 증례는 닭에서 매개체 없이 칠면조편모충이 직접전파에 의해 감염된 사례로 판단된다.

Keywords

References

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