Avaliação das características do líquido ruminal associada à termografia digital e atividade pedométria em vacas holandesas

• Autor(a) principal: Rodrigues, Mirian [UNESP]
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/127539
• topic: Bovino de leite; Termografia; Acidose; Laminite; Casco de animais; Ferimentos e lesões; Laminitis

This study aimed to correlate the subacute ruminal acidosis with the occurrence of subclinical laminitis in high producing dairy cows, of a commercial herd. We assessed 200 Holstein cows with high milk production, they were divided into four groups, which was established high milk production from the daily productivity. The animals were submitted to clinical examination, collection of rumen fluid by oral gavage, blood gas analysis, thermography and digital pedometrics. Values of pH and evidence of reduction of methylene blue rumen, daily productivity, number of animals steps, the temperature digits and limbs, blood gas (PCO2, TCO2, HCO3, SO2 and EB) all those had been determined and statistically correlated. No have assessed animals that showed changes in ruminal pH and blood gas analysis. The thermographic analysis revealed higher temperature in the medial forelimb digits right (59.4%) and left (55.2%). While in the hind limbs was observed that the temperature was bigger in the right side digits (65.9%) and left (64.9%). It had been noted that 84.9% of the animals had pelvic limbs warmer than the forelimbs. It had been also observed that the higher the temperature recorded was, the lower was the milk yield (P <0.01). The abnormalities were found by digital thermography allowed in cows triage affected by foot problems affections. Therefore, these disorders identification were only possible through clinical examination of specific digits. The pedometrics was effective, because we had observed a reduction number of animals steps because of the pain, and then correlated with lower milk production. Risk factors as abrasive concrete, inadequate accommodation, subacute ruminal acidosis associated with undiagnosed by the methodology used, they were the main causes of affections podal. The subclinical laminitis occurred primarily cows from the herd, considering the multifactorial etiology from this affections, ...