Efficacy of CIDR Treatment against Ovarian Follicular Cysts in Cows

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概要

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• The objectives of this study were to identify cows with follicular cysts and study the efficacy of CIDR (Progesterone=1.9g) treatment against ovarian follicular cysts in Japanese Black and Hoistein cows. Forty-one cows from Kagoshima Prefecture and Miyazaki Prefecture were initially identified by rectal palpation to have follicular cysts. These were randomly allocated into three groups where group 1 (n=29) were treated with CIDR for 7 days, group 2 (n=11) treated with CIDR for 14 days, and group 3 (n=1) as the control group where no CIDR was inserted. After removal of CIDR, all animals received an intramuscular injection of 25 mg PGF_<2α>. Fifteen out of 41 cows were confirmed to have follicular cysts after plasma progesterone determination by radioimmunoassay, as they had a pre-treatment progesterone concentration of<1ng/ml. Four Holstein cows were treated with 7 days of insertion. The plasma progesterone concentration increased significantly (P<0.01) after CIDR treatment i. e. day 0 (0.32±0.22ng/ml) to day 21 (3.96±1.99ng/ml). Eight Japanese Black cows with a pre-treatment mean plasma progesterone concentration of 0.32±0.26ng/ml were treated with CIDR for 7 days where 7 of them (87.5%) had an increased post-treatment progesterone concentration of 3.66±1.54ng/ml (P<0.01). Three Japanese Black cows treated with 14 days of CIDR insertion had pre-treatment and post-treatment progesterone concentrations of 0.35±0.14ng/ml and 2.40±1.86ng/ml, respectively (P=0.09). Fourteen out of fifteen ovarian follicular cyst cases had increased progesterone levels 14 days after CIDR removal (post-treatment period), 11 cows (73.3%) came to estrus 2-6 days after removal of the CIDR device and ovulation of a dominant follicle occurred with following formation of the corpus luteum. The overall success rate of CIDR treatment against ovarian follicular cysts (increase in plasma progesterone concentration>1ng/ml) was 93.3% in both treated groups.

• 鹿児島大学の論文
• 2004-02-20

著者

• KAMIMURA Shunichi

  Laboratory of Theriogenology, University of Miyazaki

• Kamimura Shunichi

  Laboratory Of Theriogenology Kagoshima University

• Ando Takaaki

  Laboratory Of Theriogenology Kagoshima University

• HAMANA Katsumi

  Laboratory of Theriogenology, Kagoshima University

• NDOSSI Doreen

  Laboratory of Theriogenology, Department of Veterinary Medicine

• IWAKUMA Akihiro

  Laboratory of Theriogenology, Department of Veterinary Medicine

• MATSUZAKI Kazutoshi

  NOSAI Kagoshima Chubu, Kurino-cho, Kagoshima

• MATSUSHITA Toshihiko

  NOSAI Kagoshima Chubu, Hiskikari-cho, Kagoshima

• NOJIRI Yuji

  NOSAI Hokusatsu, Miyanojo-cho, Kagoshima

• KAIZO Shunichi

  NOSAI Nishimoro, Kobayashi-shi, Miyazaki

• Nojiri Yuji

  Nosai Hokusatsu Miyanojo-cho Kagoshima

• Ndossi Doreen

  Laboratory Of Theriogenology Department Of Veterinary Medicine

• Amrozi Amrozi

  Laboratory Of Theriogenology Kagoshima University;(present Address) Department Of Reproduction And O

• Hamana K

  Laboratory Of Theriogenology Kagoshima University

• Hamana Katsumi

  Laboratories Of Veterinary Reproduction

• Matsuzaki Kazutoshi

  Nosai Kagoshima Chubu Kurino-cho Kagoshima

• Matsushita Toshihiko

  Nosai Kagoshima Chubu Hiskikari-cho Kagoshima

• Kamimura Shunichi

  Laboratory Of Theriogenology Faculty Of Agriculture University Of Miyazaki

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• Apoptotic Cells in Dominant Follicles in Japanese Black Cows
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