title: Comparison of rumen fluid pH by continuous telemetry system and bench pH meter in sheep with different ranges of ruminal pH.
abstract: 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 (T 0) 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 (r = 0.94, P < 0.05) 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., P = 0.0001). 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.
authors: 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.
authors: Leonardo F
authors: LF
authors: Reis
authors: Institute of Biodiversity and Forest, Federal University of Western Pará, Avenida Vera Paz S/N, Salé, 68000-000 Santarém, PA, Brazil.
authors: Antonio H H
authors: AH
authors: Minervino
authors: 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.
authors: Carolina A S C
authors: CA
authors: Araújo
authors: 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.
authors: Rejane S
authors: RS
authors: Sousa
authors: 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.
authors: Francisco L C
authors: FL
authors: Oliveira
authors: 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.
authors: Frederico A M L
authors: FA
authors: Rodrigues
authors: 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.
authors: Enoch B S
authors: EB
authors: Meira-Júnior
authors: 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.
authors: Raimundo A
authors: RA
authors: Barrêto-Júnior
authors: 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.
authors: Clara S
authors: CS
authors: Mori
authors: 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.
authors: Enrico L
authors: EL
authors: Ortolani
mesh_terms: D000818:Animals; D001826:Body Fluids; D006863:Hydrogen-Ion Concentration; D012417:Rumen; D012756:Sheep; D013686:Telemetry