Meningoencephalitis with malacia caused by Sarcocystis calchasi in a rock pigeon in Japan

Mio KOBAYASHI; Keisuke TAKESUE; Tetsuhito KIGATA; Natsumi KOBAYASHI; Susumu IWAIDE; Tomoaki MURAKAMI; Hayato HARIMA; Akiko YAMAZAKI; Daigo AZAKAMI; Makoto SHIBUTANI; Toshinori YOSHIDA

doi:10.1292/jvms.24-0069

This article has now been updated. Please use the final version.

Meningoencephalitis with malacia caused by Sarcocystis calchasi in a rock pigeon in Japan

Mio KOBAYASHI, Keisuke TAKESUE, Tetsuhito KIGATA, Natsumi KOBAYASHI, Susumu IWAIDE, Tomoaki MURAKAMI, Hayato HARIMA, Akiko YAMAZAKI, Daigo AZAKAMI, Makoto SHIBUTANI, Toshinori YOSHIDA

Author information

Mio KOBAYASHI
Laboratory of Veterinary Pathology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology
Keisuke TAKESUE
Laboratory of Veterinary Pathology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Tetsuhito KIGATA
Laboratory of Veterinary Anatomy, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Natsumi KOBAYASHI
Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Susumu IWAIDE
Cooperative Division of Veterinary Sciences, Tokyo University of Agriculture and Technology
Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Tomoaki MURAKAMI
Laboratory of Veterinary Toxicology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Hayato HARIMA
Laboratory of Veterinary Public Health, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Akiko YAMAZAKI
Cooperative Department of Veterinary Medicine, Iwate University
Daigo AZAKAMI
Animal Medical Center, Tokyo University of Agriculture and Technology
Laboratory of Veterinary Clinical Oncology, Tokyo University of Agriculture and Technology
Makoto SHIBUTANI
Laboratory of Veterinary Pathology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology
Toshinori YOSHIDA
Laboratory of Veterinary Pathology, Cooperative Department of Veterinary Medicine, Tokyo University of Agriculture and Technology

Keywords: malacia, pigeon protozoan encephalitis, rock pigeon, Sarcocystis calchasi

JOURNAL OPEN ACCESS Advance online publication

Article ID: 24-0069

DOI https://doi.org/10.1292/jvms.24-0069

The final version of this article is now available: Vol. 86 (2024), No. 8 pp. 906-910

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Abstract

Sarcocystis spp. cause pigeon protozoan encephalitis, a neuronal disease. A female pigeon exhibiting torticollis had a necrotic area in the cerebral hemisphere surrounded by lesions with perivascular cuffing, gliosis, granulomatous foci, and meningitis. Non-necrotic lesions were also observed in the brainstem. Intact and degenerative schizonts were observed within the neuropils and neurons in the lesions. Deoxyribonucleic acid (DNA) was extracted from paraffin-embedded brain tissues and genetically analyzed after gel electrophoresis to determine Sarcocystis spp. using specific primer sets for 28S ribosomal ribonucleic acid and internal transcribed spacer region-1. DNA sequencing confirmed a significant homology with S. calchasi. This is the first report of meningoencephalitis with malacia caused by S. calchasi in a rock pigeon in Japan.

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