Forestomach developmental failure in an 11-month-old japanese black steer with severely retarded growth and chronic ruminal tympany

Tetsushi Ono, Keiichi Hisaeda, Yoichi Inoue, Yutaka Yamada, Kenichi Shibano, Ikki Mitsui, Chizuka Henmi, Yumi Une, Hideaki Hayashi, Sanggun Roh, Masakatsu Nohara, Eiji Uchida, Hajime Nagahata

Research output: Contribution to journalComment/debatepeer-review

Abstract

This study reports findings from the pathological examination of the forestomach of an 11-month-old Japanese Black steer with severely retarded growth (41% of expected weight) and chronic ruminal tympany. The ruminal papillae were weakly formed (0.3–0.5 cm long) and unevenly distributed. The cellulae and cristae reticuli were underdeveloped; the cristae were 0.4–0.7 cm in height and milky white. The keratinized layer in the stratified squamous epithelium was thickened. Ruminal pH was 5.25, and ruminal volatile fatty acid concentration was 11.7 mM. The steer’s severely retarded growth was considered to be caused by malnutrition due to developmental and functional failure of the forestomach.

Original languageEnglish
Pages (from-to)220-225
Number of pages6
JournalJournal of Veterinary Medical Science
Volume83
Issue number2
DOIs
Publication statusPublished - 2021

Keywords

  • Chronic ruminal tympany
  • Developmental failure
  • Japanese Black steer
  • Ruminal papillae

ASJC Scopus subject areas

  • veterinary(all)

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