Nghiên cứu tỷ lệ và các tương quan tiềm năng giữa ketosis cận lâm sàng và acidosis dạ cỏ bán cấp tính đồng xuất hiện ở bò sữa Holstein Friesian tại trại vinamilk Đà Lạt
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Abstract
This study aimed to determine the prevalence of subclinical ketosis (SCK), subacute ruminal acidosis (SARA), and their co-occurrence in Holstein Friesian dairy cows at Vinamilk Dairy Farm, Da Lat during the early postpartum period. Rumen fluid and blood samples were collected from 200 cows to measure pH and β-hydroxybutyrate (BHB) concentrations. The results showed that the prevalence of SCK was 22%, SARA was 1%, and the co-occurrence rate was 2.5%. Correlation analysis revealed a significant inverse correlation between BHB and rumen pH (r = -0.16; P = 0.02), and a positive correlation between days in milk (DIM) and BHB (r = 0.25; P = 0.0004). Body condition score loss (BCS loss) tended to increase the risk of SCK and SARA. The study concluded that SCK and SARA can co-occur due to negative energy balance, and simultaneous monitoring of BHB, rumen pH, and BCS loss is necessary for early detection of metabolic disorders in high-yielding dairy cows.
Tóm tắt
Nghiên cứu này được thực hiện nhằm xác định tỷ lệ mắc ketosis cận lâm sàng (SCK), acidosis dạ cỏ bán cấp tính (SARA) và tỷ lệ đồng mắc giữa hai bệnh này ở bò sữa Holstein Friesian tại trại Vinamilk Đà Lạt trong giai đoạn đầu sau đẻ. Mẫu dịch dạ cỏ và máu được thu thập từ 200 con bò để đo pH và nồng độ β-hydroxybutyrate (BHB). Kết quả cho thấy tỷ lệ SCK là 22%, SARA là 1% và tỷ lệ đồng mắc là 2,5%. Phân tích tương quan cho thấy mối tương quan nghịch có ý nghĩa giữa BHB và pH dạ cỏ (r = -0,16; P = 0,02) và DIM có tương quan thuận với BHB (r = 0,25; P = 0,0004). Mức giảm điểm thể trạng (BCS loss) có xu hướng làm tăng nguy cơ SCK và SARA. Nghiên cứu kết luận rằng SCK và SARA có thể đồng phát do mất cân bằng năng lượng âm và việc giám sát đồng thời BHB, pH dạ cỏ và BCS loss là cần thiết để phát hiện sớm rối loạn chuyển hóa ở bò sữa.
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