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  ¿î¿µÀÚ 2005-09-05 15:31:16 | Hit : 18608 | Vote : 7955
Subject   [ÀÚ·á] Fatal baylisascaris larva migrans in a colony of japanese macaques kept by a safari-style zoo in Japan
Journal of Parasitology: Vol. 91, No. 3, pp. 716–719.

Fatal Baylisascaris Larva Migrans in a Colony of Japanese Macaques Kept by a Safari-Style Zoo in Japan

Hiroshi Sato,a Yumi Une,a, b Shigehisa Kawakami,a, c Eriko Saito,a, c Haruo Kamiya,a Nobuaki Akao,a, d and Hidefumi Furuokaa, e
aDepartment of Parasitology, Hirosaki University School of Medicine, Hirosaki 036-8562, Japan
bLaboratory of Veterinary Pathology, School of Veterinary Medicine, Azabu University, Sagamihara 229-8501, Japan
cResearch Center for Zoo Animals, Gunma Safari World, Tomioka 370-2321, Japan
dSection of Environmental Parasitology, Graduate School of Tokyo Medical and Dental University, Tokyo 113-8519, Japan
eDepartment of Pathobiological Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan. E-mail: sato7dp4@cc.hirosaki-u.ac.jp


A colony of Japanese macaques (Macaca fuscata fuscata) kept by a safari-style zoo in Japan experienced 9 sporadic cases of fatal neurological diseases, such as epilepsy and posterior paralysis, during the 12 yr from 1989 to 2001. This macaque colony consisted of approximately 30 animals, on average, during this period, and the macaques shared their living space with 11 American black bears (Ursus americanus) harboring zoonotic roundworms (Baylisascaris transfuga). Close to this enclosure, a cote for 2–3 raccoons (Procyon lotor) was placed, and raw sewage from this cote ran into a shallow drain in the area for macaques and bears. However, fecal examinations in recent years did not detect the infection of raccoons with zoonotic roundworms (Baylisascaris procyonis). Postmortem histological examination of the latest 2 ill macaques detected multifocal malacia in the brain; 2 ascarid larvae of 60 ¥ìm maximum width were encapsulated in the cerebrum and lungs of 1 of the animals. To determine the causative ascarid species of the fatal larva migrans, we analyzed 2 additional encapsulated Baylisascaris larvae collected from formalin-fixed lungs by morphological and molecular approaches. This sporadic outbreak is the second record of Baylisascaris larva migrans in animals in Japan.

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