Broiler chicken malaria caused by Plasmodium juxtanucleare detected during poultry inspection
2015
Hidaka, R. (Sueyoshi Meat Inspection Center, Soo, Kagoshima (Japan)) | Nakajima, S. | Kuriwaki, K. | Goto, Y. | Matsumoto, M. | Sakotsubo, T.
In September-October 2013, some broiler chickens exhibiting splenomegaly were observed during poultry inspection, and protozoa adjacent to the erythrocyte nucleus were recognized in the spleen smears. Pathological examination and molecular (polymerase chain reaction:PCR) analysis were performed on spleens collected from 19 chickens. Histologically, the spleens showed extension of the red pulp, activation of the reticuloendothelial cells, and deposition of malaria pigment. In the PCR assay targeting the cytochrome b gene of the Haemoproteus spp. and Plasmodium spp. mitochondrial genome, specific amplifications were detected and the sequences of PCR products showed high homology with Plasmodium juxtanucleare. These results were consistent with a diagnosis of chicken malaria. Then, it is necessary to differentiate them from Leucocytozoonosis, although chicken malaria caused by P. juxtanucleare has not been important in Japan. In addition, we should pay attention to the occurrence of the disease as a farm environment indicator.
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