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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