Caracterização clínica do deslocamento do abomaso à esquerda e estimativa da produção de leite diária durante os 10 dias seguintes à abomasopexia por laparoscopia (método de Christiansen) em vacas leiteiras
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2014
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O Deslocamento de abomaso (DA) é uma desordem abdominal frequente nos sistemas de produção leiteira e a razão mais frequente para a realização de cirurgia abdominal em vacas. O DA e as suas complicações representam perdas significativas para a exploração, com o custo de tratamento, quebras de produção e com perdas de animais (refugo ou morte). Este trabalho teve como objetivos a caracterização dos parâmetros clínicos, bioquímicos e produtivos de vacas, com DA à esquerda, e a recuperação de produção leiteira até 10 dias após tratamento, por cirurgia minimamente invasiva, de acordo com o nº de lactações e as concentrações séricas de glucose e de β-Hidroxibutirato (BHB), medidas no momento da correção. O intervalo médio parto-tratamento foi de 18,5 dias com intervalo de confiança de 95% (IC95%) de 10,1 a 26,8 dias (n = 27). O dia de início de apetite irregular foi de -4,8 (IC95%: -7,3 a -2,2, n = 18) e o dia de início da diminuição da produção de leite -3,5 (IC95%: -5,1 a -1,9; n = 25). Não foram observadas diferenças estatísticas de acordo com a paridade e níveis de glucose e BHB. Foi observado que as vacas primíparas (n = 7) tiveram uma evolução da produção de leite diário diferente (P < 0.05) das vacas multíparas (n=20) no que concerne o período compreendido entre as 2 últimas ordenhas (D0) antes do tratamento e os 10 dias seguintes. A produção em D0 foi de 10,6 ± 3,1 L para vacas primíparas e de 19,61 ± 1,9 L para vacas primíparas (P < 0,05). Observou-se um incremento progressivo na produção média diária a partir de D0 nas 1ª (r = 0,64; P < 0,001) e 3ª lactações, enquanto na 2ª (r = 0,57; P < 0,001) e 4ª ou mais lactações (r = 0,49; P < 0,001) esse incremento iniciou-se em D2 e D4, respetivamente. Esse incremento (r = 0,80; P< 0,001) também foi observado em vacas com níveis de glucose ≤ 70 mg/dl e de BHB > 1,7 mmol/L. Para níveis de glucose > 70 mg/dl e de BHB ≤ 1,7 mmol/L, as correlações entre produção de leite diária e dias pós tratamento foram muito baixas e na quase totalidade dos casos não significativas (P > 0,05). Os nossos resultados sugerem que de acordo com a paridade, os animais com níveis mais elevados de glucose e mais baixos de BHB têm uma recuperação mais tardia da produção leiteira. Concluímos, assim, que a avaliação de glucose e do BHB, no momento do tratamento, poderá ser um indicador de prognóstico de recuperação de produção leiteira. No entanto, são necessários estudos com uma maior amostragem, de forma a utilizar o BHB e glucose como forma de prognóstico, na estimativa de produção leiteira diária, após o tratamento.
The abomasum displacement (AD) is a common abdominal disorder in dairy farms and the most frequent reason to perform abdominal surgery in cattle. The AD and its complications are associated with significant losses with the cost of treatment, loss of production and livestock (refuge or death). The aim of this study was to characterize the clinical, biochemical and production parameters in cows with LDA, and the recovery of milk production up to 10 days after treatment through minimally invasive surgery, according to the number of lactations and glucose and BHB serum concentrations measured at the time of the surgery. The median number of calving-treatment was 18.5 days with a confidence interval of 95% (95% CI) 10.1 to 26.8 days (n = 27). The beginning of irregular appetite was -4.8 days (95% CI: -7.3 to -2.2, n = 18) and the decreased of milk production -3.5 days (95% CI: -5.1 to -1.9, n = 25). No statistical differences were observed related to number of lactations and levels of glucose and BHB. It was observed that primiparous cows (n = 7) had an increase in daily milk production differently (P <0.05) than multiparous cows (n = 20) regarding the period between the day of the treatment and the following 10 days. The milk production on D0 for primiparous cows was 10.6 ± 3.1 L and for multiparous cows was 19.61 ± 1.9 L (P <0.05). There was a progressive increase in the average daily milk production from D0 in the 1st (r = 0.64, P <0.001) and 3rd lactations, while the 2nd (r = 0.57, P <0.001) and 4th or more lactations (r = 0.49, P <0.001) the increase began at D2 and D4, respectively. This increase (r = 0.80, P <0.001) was also observed in cows with glucose ≤ 70 mg / dl and BHB> 1.7 mmol / L. For glucose levels > 70 mg / dl and BHB ≤ 1.7 mmol / L, the correlations between daily milk production and days after surgery were very low and in almost cases not significant (P > 0.05). Our results suggest that accordingly with the number of lactations animals with higher glucose levels and lower BHB levels have a more delayed milk production recovery. This study also suggested that measurement of BHB and glucose serum concentrations during the LDA surgical correction may be a prognostic indicator of milk production recovery. However, further studies with a larger sample are required in order to use BHB and glucose as a method of prognosis and estimate of the daily milk production after LDA treatment.
The abomasum displacement (AD) is a common abdominal disorder in dairy farms and the most frequent reason to perform abdominal surgery in cattle. The AD and its complications are associated with significant losses with the cost of treatment, loss of production and livestock (refuge or death). The aim of this study was to characterize the clinical, biochemical and production parameters in cows with LDA, and the recovery of milk production up to 10 days after treatment through minimally invasive surgery, according to the number of lactations and glucose and BHB serum concentrations measured at the time of the surgery. The median number of calving-treatment was 18.5 days with a confidence interval of 95% (95% CI) 10.1 to 26.8 days (n = 27). The beginning of irregular appetite was -4.8 days (95% CI: -7.3 to -2.2, n = 18) and the decreased of milk production -3.5 days (95% CI: -5.1 to -1.9, n = 25). No statistical differences were observed related to number of lactations and levels of glucose and BHB. It was observed that primiparous cows (n = 7) had an increase in daily milk production differently (P <0.05) than multiparous cows (n = 20) regarding the period between the day of the treatment and the following 10 days. The milk production on D0 for primiparous cows was 10.6 ± 3.1 L and for multiparous cows was 19.61 ± 1.9 L (P <0.05). There was a progressive increase in the average daily milk production from D0 in the 1st (r = 0.64, P <0.001) and 3rd lactations, while the 2nd (r = 0.57, P <0.001) and 4th or more lactations (r = 0.49, P <0.001) the increase began at D2 and D4, respectively. This increase (r = 0.80, P <0.001) was also observed in cows with glucose ≤ 70 mg / dl and BHB> 1.7 mmol / L. For glucose levels > 70 mg / dl and BHB ≤ 1.7 mmol / L, the correlations between daily milk production and days after surgery were very low and in almost cases not significant (P > 0.05). Our results suggest that accordingly with the number of lactations animals with higher glucose levels and lower BHB levels have a more delayed milk production recovery. This study also suggested that measurement of BHB and glucose serum concentrations during the LDA surgical correction may be a prognostic indicator of milk production recovery. However, further studies with a larger sample are required in order to use BHB and glucose as a method of prognosis and estimate of the daily milk production after LDA treatment.
Descrição
Dissertação de Mestrado Integrado em Medicina Veterinária
Palavras-chave
Vaca leiteira , Abomaso (deslocamento à esquerda) , Ácido 3-hidroxibutírico , Glucose , Produção leiteira , Patologia clínica , Prognóstico , Procedimentos cirúrgicos operatórios , Abomasopaxia , Doenças concomitantes