Application of a simple measuring method to evaluate the fecal microflora of dairy cows in the summer season

Authors

  • Miki Amimoto Laboratory of Animal Behavior and Physiology, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan.
  • Yoshimitsu Ouchi Laboratory of Animal Behavior and Physiology, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan.
  • Miki Okita Laboratory of Animal Behavior and Physiology, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan.
  • Takashi Hirota Laboratory of Animal Behavior and Physiology, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan.
  • Yoshimi Imura Faculty of Agriculture, University of the Ryukyus, Japan.
  • Takashi Bungo Laboratory of Animal Behavior and Physiology, Graduate School of Integrated Science for Life, Hiroshima University, Higashi-Hiroshima, Japan.

Keywords:

Lactobacillus; Escherichia coli; heat stress; feces; cows

Abstract

Objective: The effect of seasonality needs to be considered in designing future studies because global warming has caused a rise in ambient temperatures. The objective of the present study is to investigate the effect of high ambient temperatures on fecal score and fecal microflora in dairy cows during summer.  Materials and Methods: During the 7 days before the sampling of feces, the daily mean tempera­tures were 19.9°C in early summer and more than 27.5°C in late summer. Fecal samples were collected from the rectum of cows and the fecal score was evaluated on a 4-point scale. The equalized samples were used to extract the genomic deoxyribonucleic acid (DNA) of the bacteria (Escherichia coli, Salmonella, Lactobacillus, and Bifidobacterium).  Results: There was no significant difference in fecal scores between the sampling times in early and late summer. In the populations of the bacteria, there was no significant difference between sampling days in the DNA level of Salmonella, and E. coli in late summer increased to more than three times the level in early summer. However, both levels of Lactobacillus and Bifidobacterium in early summer significantly decreased after 2 months.  Conclusion: These data suggest that the increase in temperature in late summer may adversely affect the populations of bacteria in the intestinal environment of dairy cows. In addition, the method used in the present study was sufficient to evaluate the changes in internal and external environmental conditions of dairy cattle.

J. Adv. Vet. Anim. Res., 8(2): 307-311, June 2021

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Published

2021-06-25

How to Cite

Amimoto, M., Ouchi, Y., Okita, M., Hirota, T., Imura, Y., & Bungo, T. (2021). Application of a simple measuring method to evaluate the fecal microflora of dairy cows in the summer season. Journal of Advanced Veterinary and Animal Research, 8(2), 307–311. Retrieved from https://banglajol.info/index.php/JAVAR/article/view/76285

Issue

Vol. 8 No. 2 (2021)

Section

Short Communications

License

Copyright (c) 2021 Miki Amimoto, Yoshimitsu Ouchi, Miki Okita, Takashi Hirota, Yoshimi Imura, Takashi Bungo

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