Antibiotics in calf starters: differences in rumen microbial populations

Authors

  • Carlos de Sousa Lucci Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP
  • Harry Russel Conrad Ohio State University, Columbus, OH

DOI:

https://doi.org/10.11606/issn.2318-3659.v19i2p153-156

Keywords:

Antibiotics, Nutrition of calves, Rumen microbiology

Abstract

Nineteen Holstein calves were used in a randonmized design, distributed on a 2x2 fatorial treatment, being fed: with (treatment A) and without (treatment B) antibiotics up to 8 weeks old. In the 4th and 7th week, ruminal samples were collected through aesophageal tube. Rumen volumes were estimated through the Polyethylenglicol (PEG) technique. Results showed an increase in rumen volumes from 4 to 7 weeks, this increment was similar for both treatments. There were no statistical differences between animals concerning bacterial counts/ml rumen liquor.

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Published

1982-09-15

Issue

Vol. 19 No. 2 (1982)

Section

ZOOTECHNICS

How to Cite

Antibiotics in calf starters: differences in rumen microbial populations. (1982). Revista Da Faculdade De Medicina Veterinária E Zootecnia Da Universidade De São Paulo, 19(2), 153-156. https://doi.org/10.11606/issn.2318-3659.v19i2p153-156