Comparison of Rumen Fluid pH by Continuous Telemetry System and Bench pH Meter in Sheep with Different Ranges of Ruminal pHReport as inadecuate

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The Scientific World JournalVolume 2014 2014, Article ID 195782, 4 pages

Research Article

Department of Clinical Science, Faculty of Veterinary Medicine, University of Sao Paulo, Avenida Professor Orlando Marques de Paiva, 87 Cidade Universitária, 05508-270 São Paulo, SP, Brazil

Institute of Biodiversity and Forest, Federal University of Western Pará, Avenida Vera Paz S-N, Salé, 68000-000 Santarém, PA, Brazil

Department of Animal Science, Federal Rural University of the Semiarid Region, Avenida Francisco Mota, s-n Bairro Presidente Costa e Silva, 59625-900 Mossoró, RN, Brazil

Received 30 January 2014; Accepted 18 April 2014; Published 21 May 2014

Academic Editor: Benito Soto-Blanco

Copyright © 2014 Leonardo F. Reis et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We aimed to compare the measurements of sheep ruminal pH using a continuous telemetry system or a bench pH meter using sheep with different degrees of ruminal pH. Ruminal lactic acidosis was induced in nine adult crossbred Santa Ines sheep by the administration of 15 g of sucrose per kg-BW. Samples of rumen fluid were collected at the baseline, before the induction of acidosis and at six, 12, 18, 24, 48, and 72 hours after the induction for pH measurement using a bench pH meter. During this 72-hour period, all animals had electrodes for the continuous measurement of pH. The results were compared using the Bland-Altman analysis of agreement, Pearson coefficients of correlation and determination, and paired analysis of variance with Student’s t-test. The measurement methods presented a strong correlation , but the rumen pH that was measured continuously using a telemetry system resulted in lower values than the bench pH meter overall mean of 5.38 and 5.48, resp., . The telemetry system was able to detect smaller changes in rumen fluid pH and was more accurate in diagnosing both subacute ruminal lactic acidosis and acute ruminal lactic acidosis in sheep.

Author: Leonardo F. Reis, Antonio H. H. Minervino, Carolina A. S. C. Araújo, Rejane S. Sousa, Francisco L. C. Oliveira, Frederico A.



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