Pre- and post-paturition rumen volatile fatty acid composition and blood chemistry in ketotic and non-ketotic dairy cows

케톤증(症) 및 비(非)케톤증(症) 빈유우간(牝乳牛間)의 출산전후시(出産前後時) 제1위내(第1胃內) 휘발성지방산(揮發性脂肪酸)과 혈액화학치(血液化學値)의 변화(變化) 비교관찰(比較觀察)

  • Hamakawa, Masaaki (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Shohji, Hiroshisa (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Sakai, Takeo (Department of Preventive Veterinary Medicine, Faculty of Agriculture and Veterinary Medicine, Nihon University) ;
  • Lee, Won-chang (Department of Veterinary Medicine and Animal Resources Research Center, Kon-Kuk University)
  • Received : 1995.05.16
  • Published : 1995.10.30

Abstract

The composition of rumen volatile fatty acids(VFA) and the blood chemistry were investigated in 5 clinically health dairy cows(Group I) reared on dairy farms and in 5 cows with post-parturition(POP) primary ketosis(Group II). The determinations were performed on days 5 to 7 pre-parturition(PRP), immediately POP, and on days 5, 10, 15, 20 and 25 POP. In both groups, the total VFA levels gradually increased starting from day 5 POP, but the levels were lower in Group II than in Group I. With regard to POP. changes in the composition of VFA, Group II occasionally showed lower levels of acetic acid and caproic acid than did Group I. Blood glucose levels decreased POP in both groups. In contrast, blood levels of ketone bodies and 3-hydroxybutyric acid were increased POP, but there was no statistically by significant difference between the groups. The aspartate aminotransferase level was transiently increased immediately POP in both groups, and the increase was more marked in Group II than in Group I. Both groups showed a tendency for total cholesterol, free cholesterol, ester cholesterol, phospholipid, and total bile acid to be increased POP, but there was no statistically significant difference between the groups. Clinically healthy dairy cows also showed POP changes in the composition of VFA and blood similar to those in dairy cows with ketosis, suggesting that even apparently healthy cows are at risk of subclinical ketosis POP.

Holstein종(種) 빈유우(牝乳牛)에 있어서 케톤증(症)이 제1위내(第1胃內)의 휘발성지방산(揮發性脂肪酸)(VFA)과 혈액화학치(血液化學値)에 미치는 영향(影響)을 알아보고저 시도(試圖)하여, 임상진단상(臨床診斷上) 건강(健康)한 빈유우(牝乳牛) 5두(頭)(제I군)과 산후(産後) 초기(初期)케톤증(症) 빈유우(牝乳牛) 5두(頭)(제II군)를 실험군(實驗群)으로 하여, 출산전(出産前) 5일(日)부터 7일(日) 그리고 출산후(出産後) 5, 10, 15, 20 및 25일(日)에의 VFA를 검사(檢査) 비교(比較)하여 본 바 출산후(出産後) 5일(日)부터 VFA수준(水準)이 점진적으로 증가(增加)됨이 관찰(觀察) 되었는데, 특(特)히 케톤증후군(症候群)의 VFA의 조성(組成)으로서 acetic acid와 caproic acid치(値)가 건강빈유우(健康牝乳牛)군 보다 낮은 것이 관찰(觀察)되었다. 혈액화학치(血液化學値)로서 혈당량(血糖量)은 양군(兩群)이 공(共)히 감소경향(減少頃向)을 보인 반면(反面)에 혈중(血中) 케톤체(體)와 3-hydroxy-butyric acid는 출산후(出産後) 현저(顯著)히 증가(增加)되고 있으며 양군간(兩群間)에는 유의(有意)한 차이(差異)가 없었다. AST수준(水準)은 출산후(出産後) 양군(兩群)에서 일시적(一時的)으로 증가(增加)되었는데, 특(特)히 케톤증후군(症候群)의 경우 건강빈유우군(健康牝乳牛群)들 보다 현저(顯著)히 높았다. 혈중(血中)콜레스테롤, 유리(遊離)콜레스테롤, 콜레스테롤-에스텔, 소지질(燒脂質) 및 총담즙산(總膽汁酸)은 출산후(出産後) 증가경향(增加傾向)을 보였으나, 양군간(兩群間)에는 유의(有意)한 차이(差異)가 없었다. 이상(以上)의 결과(結果)를 미루어 보아 건강빈유우(健康牝乳牛)에서도 출산후(出産後) VFA치(値)와 혈액화학치(血液化學値)에 조성(組成)이 케톤증후군(症候群)과 비슷한 변화(變化)를 가져 오는 것은 이들 건강빈유우(健康牝乳牛)에서도 산후(産後)에 일시적(一時的)으로 준림상적(準臨床的) 케톤증후(症候)를 유발(誘發)할 수 있다는 것으로 생각된다.

Keywords