New insights on left displaced abomasum in dairy cows.
New insights on left displaced abomasum in dairy cows.
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DOI：
10.5455/ajvs.285282
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发表时间：
2018-01-01
影响因子：
--
通讯作者：
Abdullaziz, I. A.
中科院分区：
文献类型：
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作者：
Ismael, M. M.;Elshahawy, I. I.;Abdullaziz, I. A.
由于真胃左移给奶牛生产造成了巨大的经济损失，本研究旨在对真胃左移奶牛的主要血液生化指标、尿常规、乳酮、酸碱平衡测定及超声检查进行评价。对45头荷斯坦奶牛进行了这项研究; 15头奶牛临床上健康，并作为对照组;其他30头奶牛表现出皱胃移位的迹象，包括厌食、产奶量突然下降、稀糊状粪便，甚至有些表现出腹泻，其中含有部分谷物、绞痛和呼吸中的酮气味。通过同时叩诊和听诊背侧左侧，特别是在腰旁窝的前三分之一和第9和第12肋骨之间，听到特征性的叮当声。超声检查显示，所有奶牛在左侧第10和第12 ICS之间的皱胃移位清晰可见。皱胃腹侧可见低回声内容物，背侧可见气帽伴混响伪影。皱胃置换奶牛的实验室检查结果显示，显著的低钠性低钾性低钾性代谢紊乱，伴有低钙血症、低磷血症、酮尿和酸尿。血清总蛋白、白蛋白、球蛋白、胆固醇、甘油三酯和葡萄糖值显著降低。另一方面，发现患有左侧皱胃移位（LDA）的奶牛的血清尿素、肌酐、ALT、AST和BHBA浓度显著升高。氧化-抗氧化研究表明，一氧化氮和丙二醛的水平显着增加，而血清总抗氧化能力的活性表现出显着下降，在LDA影响奶牛。LDA会增加脂质过氧化作用，因此建议在治疗此类病例时使用抗氧化剂。
Because left displacements of abomasum cause a great economic losses among dairy cattle production, so this study was aimed to evaluate the main hematological and biochemical alterations, urinalysis, milk ketones, determination acid base balance and ultrasonographic findings of cows with left displaced abomasum (LDA). This study was performed on forty five Holstein dairy cows; fifteen cows were clinically healthy and kept as a control group; the other thirty cows showed signs of abomasal displacement that involve anorexia, sudden drop of milk yield, scanty pasty faeces even some showed diarrhea containing parts of grains, colic and ketotic odour of the breath. By simultaneous percussion and auscultation of the dorsal left flank, particularly on the cranial third of Paralumbar fossa and between 9th and 12th rib, a characteristic tinkling sounds were heard. Ultrasonographically, the displaced abomasum was clearly visible between the left 10th and 12th ICS in all cows. Hypo echoic content of abomasum appeared at left ventral region, gas cap with reverberation artifact appeared at left dorsal region. Laboratory findings of abomasal displaced cows showed a significant hyponatremic hypochloremic hypokalemic metabolic alkalosis with hypocalcaemia, hypophosphatemia, ketonuria and aciduria. Serum values of total protein, albumin, globulins, cholesterol, triglycerides and glucose were significantly decreased. On other hand a significant increase was found in serum concentrations of urea, creatinine, ALT, AST and BHBA in cows suffered from Left Displaced Abomasum (LDA). Oxidant-antioxidant study showed a significant increase in the levels of nitric oxide and malondialdehyde while, serum activity of total antioxidant capacity demonstrated a significant decrease in LDA affected cows. LDA increased lipid peroxidation so the using of antioxidants during the treatment of such cases is recommended.