Avaliação das características do líquido ruminal, hemogasometria, atividade pedométrica e diagnóstico de laminite subclínica em vacas leiteiras

Abstract

ABSTRACT.-Rodrigues M., Deschk M., Santos G.G.F., Perri S.H.V., Merenda V.R., Hussni C.A., Alves A.L.G. & Rodrigues C. A. 2013 The objectives of this study were to evaluate the characteristics of ruminal fluid, blood gas analysis, pedometer activity and suclinical laminitis occurrence, through the presence of secondary foot diseases in high production dairy cows, from a commercial herd. 200 Holstein cows originating from the same farm, located in Araçatuba/SP, Brazil, were divided into four groups, which are established from the daily milk production. Initially clinical examination of the cows was procedure, followed by sampling of rumen fluid, by esophageal tube. Fluid was evaluated for pH, color, odor, consistency, sedimentation, flotation and methylene blue reduction test. Venous blood samples were also collected for blood gas analysis, in addition to collecting data from pedometrics (number of steps) and daily milk production. Data were tabulated and submitted to correlation analysis. No animal had reported changes in rumen pH. Non-acid base imbalance were found, since the values of blood pH, PCO2, TCO2, HCO3-and BE were normal during hemogasimetric analysis. The pedometric was effective as a screening method to cows with foot diseases. It demonstrated reduction in the number of steps due to pain, correlated with lower milk production. However, the identification of foot lesions was only possible through specific digital clinical examination. The occurrence of 49.5 % of herd foot problems was due to the risk factors present in the farm. The abrasive concrete and inadequate facilities, also associated with the possible occurrence of sub-acute ruminal acidosis, were observed as risk factors. However, sub-acute ruminal acidosis was undiagnosed by the methods used. The correlation between the values of ruminal pH, and blood gas analysis pedometrics showed efficient for the early diagnosis of foot diseases and also in establishing the etiology of these diseases. Subclinical laminitis occurred primarily in cow's herd, considering the multifactorial etiology of this disease, occurrence and distribution of foot diseases diagnosed.INDEX TERMS: Affections podal, bovine, subclinical laminitis, rumen fluid, subacute ruminal acidosis.

Ruminal fermentation pattern of acidosis-induced cows fed either monensin or polyclonal antibodies preparation against several ruminal bacteria

“…Similarly, reductions in intake in animals receiving MON have been found in comparative performance studies with PAP ( 44 , 45 ). However, in the present study, MON did not reduce the DMI after an abrupt transition to high-concentrate diets, and this corroborates the absence of difference in DMI reported by Rodrigues et al ( 46 ) where they found no reduction in dry matter intake in animals that received MON, also compared to PAP. From a metabolic point of view, the evaluation of the intake behavior of animals fed high-concentrate diets with MON may provide better information than the simple quantification of the total daily intake, because this negative effect of MON on DMI is related to a lower DMI per meal ( 47 , 48 ), which consequently leads to an increase in the number of meals without changing the total amount of dry matter ingested daily ( 49 , 50 ).…”

Subclinical laminitis and its association with pO2 and faecal alterations: Isikli, Aydin experience

“…On the other hand in dairy cows with subclinical laminitis no acid base imbalance were detected, whereas in that study in Portuguese language, solely abstract was available in English revealed that the results of pO 2 was unknown (27) . It should also be noted that hepatic hypoxia ( 26) might also play a role for significant pO 2 changes detected.…”

“…Por otro lado, en vacas lecheras con laminitis subclínicas no se detectó ningún desbalance en la base ácida, mientras que en un estudio en Portugués, sólo estaba disponible el abstracto en Inglés, reveló que los resultados de pO 2 eran desconocidos (27). También cabe anotar que la hipoxia hepática (26) puede también jugar un papel importante en los cambios de pO 2 detectados.…”

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“…O Brasil possui um contingente de 212.798.000 de bovinos (ANUALPEC, 2017). Neste cenário, a bovinocultura contribuiu para aumentar o número de criatórios e torná-los vulnerável ás doenças, entre elas as podopatias (Rodrigues et al, 2013 pertinente, comissões de ética e sociedades protetoras dos animais.…”