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Res Vet Sci. 2014 Feb;96(1):28-9. doi: 10.1016/j.rvsc.2013.11.013. Epub 2013 Dec 2.

Effects of the acid-tolerant engineered bacterial strain Megasphaera elsdenii H6F32 on ruminal pH and the lactic acid concentration of simulated rumen acidosis in vitro.

Author information

  • 1College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China; College of Veterinary Medicine, Jilin University, Jilin 130062, China.
  • 2Wellhope Agri-rech Co., Ltd., Shenyang 110164, China.
  • 3College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Shenyang 110866, China.
  • 4College of Veterinary Medicine, Jilin University, Jilin 130062, China.
  • 5College of Veterinary Medicine, Jilin University, Jilin 130062, China. Electronic address: guowenliu73@126.com.

Abstract

The aim of this study was to examine the effects of the acid-tolerant engineered bacterial strain Megasphaera elsdenii H6F32 (M. elsdenii H6F32) on ruminal pH and the lactic acid concentrations in simulated rumen acidosis conditions in vitro. A mixed culture of ruminal bacteria, buffer, and primarily degradable substrates was inoculated with equal numbers of M. elsdenii H6 or M. elsdenii H6F32. The pH and lactic acid concentrations in the mixed culture were determined at 0, 2, 4, 6, 8, 10, 12, 14, 16, and 18 h of incubation. Acid-tolerant M. elsdenii H6F32 reduced the accumulation of lactic acid and increased the pH value. These results indicate that acid-tolerant M. elsdenii H6F32 could be a potential candidate for preventing rumen acidosis.

Copyright © 2013 Elsevier Ltd. All rights reserved.

KEYWORDS:

Acid-tolerant; Megasphaera elsdenii; Rumen acidosis

PMID:
24360648
[PubMed - indexed for MEDLINE]
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