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Summary The larvae of the genus  Baylisascaris  can cause larva migrans in mammals and birds. This study investigated the larval migration of  Baylisascaris potosis , the roundworm of kinkajou ( Potos flavus ), in chickens and the associated clinical manifestations of the host. Thirty-six 3-week-old chickens divided into 6 groups were orally inoculated with 3,000  B. potosis  eggs/chick. Each group of chicken was necropsied at days 1, 2, 3, 7, 30 and 90 PI (post inoculation), and the number of larvae in various organs were counted until day 90 PI. No clinical signs were observed in chickens during the study. Larvae were detected from the liver, lungs or breast-muscles of 13/36 (36.1%) chickens. The mean total number of larvae in the liver, lungs and breast-muscles at days 1, 2, 3, 7, 30 and 90 PI were 0.34, 0.17, 1.66, 1.01, 0.17 and 0, respectively. No larvae were found in the brain, eyes, hid-limb muscles, heart, kidneys and spleen. Although infectivity of larvae in egg-inoculated chickens was low, the present study demonstrated that  B. potosis  larvae can migrate in chickens tissues up to day 30 PI. The result suggests that chickens can serve as a paratenic host for  B. potosis  and may underline a public health importance of  B. potosis  infection as a potential foodborne disease in humans.

Experimental infection with Baylisascaris potosis in chickens