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Concurrent Fowlpox and Candidiasis Diseases in Backyard Chickens with Unusual Pox Lesions in the Bursa of Fabricius.

Authors
  • Ogasawara, Fusae1
  • Yamamoto, Yu2
  • Sato, Yasuo1
  • Fukunari, Kazuhiro3
  • Murata, Ken-Ichi1
  • Yaegashi, Gakuji1
  • Goto, Makiko1
  • Murakami, Ryukoh1
  • 1 A Iwate Central Livestock Hygiene Service Center, 390-5 Sunakomi, Takizawa, Iwate 020-0605, Japan. , (Japan)
  • 2 B National Institute of Animal Health, 3-1-5 Kannondai, Tsukuba, Ibaraki 305-0856, Japan. , (Japan)
  • 3 C Iwate Prefectural Government Office, 10-1 Uchimaru, Morioka, Iwate 020-8570, Japan. , (Japan)
Type
Published Article
Journal
Avian Diseases
Publisher
BioOne (American Association of Avian Pathologists)
Publication Date
Sep 01, 2016
Volume
60
Issue
3
Pages
705–708
Identifiers
DOI: 10.1637/11397-022416-Case.1
PMID: 27610735
Source
Medline
Keywords
License
Unknown

Abstract

Concurrent fowlpox and candidiasis diseases occurred in a backyard chicken flock. Four deceased chickens (one Nagoya breed and three white silkie chickens) were examined for diagnosis. At necropsy, white curd-like plaques were observed in the crop. Fungal elements that stained positive for Candida albicans with immunohistochemistry were distributed throughout the tongue, choanal mucosa, esophagus, and crop. Typical fowlpox lesions, composed of proliferating epithelial cells with ballooning degeneration and viral intracytoplasmic inclusions, were observed in the conjunctiva, nasal mucosa, and skin around the cloaca. Interestingly, hyperplastic interfollicular epithelium with rare virus inclusions was observed in the bursa of Fabricius (BF). Some bursal follicles were replaced by proliferating epithelial cells. These proliferating cells immunohistochemically stained positive for cytokeratin. PCR and subsequent genetic sequencing detected the C. albicans gene in the crop, and fowlpox virus genes in the BF. These results indicate that this outbreak was a rare presentation of fowlpox in spontaneously infected chickens, with unusual pox lesions in the BF.

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