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11 October 2013 Diagnosis of Leucocytozoon caulleryi Infection in Commercial Broiler Breeders in South Korea
Dong-Hun Lee, Jun-Hyuk Jang, Byoung-Yoon Kim, Yong-Kuk Kwon, Susantha Gomis, Joong-Bok Lee, Seung-Yong Park, In-Soo Choi, Chang-Seon Song
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Abstract

This report confirms a recent outbreak of a Leucocytozoon caulleryi infection in a commercial broiler breeder flock in South Korea. Seven, 18-day-old broiler breeders (Gallus gallus) were necropsied following a history of depression, sudden death, and subcutaneous hemorrhages. On necropsy, subcutaneous hemorrhages were identified in the wings and legs, pectoral and thigh muscles, thymus, epicardium, pancreas, and kidneys. On histopathology, there were numerous schizonts and merozoits of a Leucocytozoon sp. noted in the heart, spleen, liver, kidneys, thymus, and bursa of Fabricius. Molecular analysis of the mitochondrial cytochrome oxidase b confirmed that the causative agent was Leucocytozoon caulleryi. Although L. caulleryi was diagnosed previously in South Korea, there had been no reports of L. caulleryi over the past several decades.

Reporte de Caso—Diagnóstico de la infección en Leucocytozoon caulleryi en rereproductores pesados comerciales en Corea del Sur.

Este informe confirma un brote reciente de la infección con Leucocytozoon caulleryi en un lote comercial de reproductoras pesadas en Corea del Sur. Se realizó la necropsia de siete reproductores de 18 días de edad (Gallus gallus) que tenían una historia de depresión, muerte repentina y hemorragias subcutáneas. A la necropsia, se identificaron hemorragias subcutáneas en las alas y las piernas, los músculos pectorales y del muslo, el timo, epicardio, páncreas y los riñones. A la histopatología, se observaron numerosos esquizontes y merozoitos de Leucocytozoon sp. especialmente en el corazón, bazo, hígado, riñones, timo y en la bolsa de Fabricio. El análisis molecular del gene mitocondrial citocromo b oxidasa confirmó que el agente causal era Leucocytozoon caulleryi. Aunque L. caulleryi fue diagnosticado previamente en Corea del Sur, no había reportes de L. caulleryi durante las últimas décadas.

American Association of Avian Pathologists
Dong-Hun Lee, Jun-Hyuk Jang, Byoung-Yoon Kim, Yong-Kuk Kwon, Susantha Gomis, Joong-Bok Lee, Seung-Yong Park, In-Soo Choi, and Chang-Seon Song "Diagnosis of Leucocytozoon caulleryi Infection in Commercial Broiler Breeders in South Korea," Avian Diseases 58(1), 183-186, (11 October 2013). https://doi.org/10.1637/10621-072913-Case.1
Received: 31 July 2013; Accepted: 1 October 2013; Published: 11 October 2013
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