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A clinical case of equine fungal placentitis with reference to hormone profiles and ultrasonography OAK
MURASE, Harutaka; NIWA, Hidekazu; KATAYAMA, Yoshinari; SATO, Fumio; HADA, Tetsuro; NAMBO, Yasuo.
Fungal placentitis is an infectious disease inducing abortion in pregnant mares. In the present report, we describe a field case of abortion caused by fungal placentitis with consecutive examinations. The progesterone level and combined thickness of the uterus and placenta (CTUP) were abnormal before the onset of clinical signs. Additionally, the estradiol level started to change before the appearance of clinical signs. Abnormal serum amyloid A values and an abnormal fetal heart rate were observed after the onset of clinical signs. The present report demonstrates that the progesterone level and CTUP may be adequate as early diagnostic markers of fungal placentitis and bacterial infection. Endocrinological evaluation based on cutoff values or serial...
Palavras-chave: Abortion; Equine; Fungal infection; Placentitis.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4289
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Anti-Müllerian hormone as an indicator of hemi-castrated unilateral cryptorchid horses OAK
MURASE, Harutaka; SAITO, Shigeaki; AMAYA, Tomohiko; SATO, Fumio; BALL, Barry Allen; NAMBO, Yasuo.
Anti-Müllerian hormone (AMH), a glycoprotein secreted from the fetal testis, is responsible for regression of the Müllerian duct in the male fetus. The aim of this study was to evaluate the usefulness of serum AMH as a biomarker for diagnosis of cryptorchidism in horses. Serum AMH concentrations were measured in intact stallions, hemi-castrated unilateral cryptorchid stallions, and geldings. In addition, expression of AMH was characterized in cryptorchid testes by immunohistochemistry. Serum AMH was detected in intact stallions (n=11, 13.3 ± 1.8 ng/ml) and in hemi-castrated cryptorchid stallions (n=8, 17.6 ± 3.0 ng/ml), but not in geldings (n=6, all data were below the limit of detection). Immunolabeling for AMH was detected in Sertoli cells of undescended...
Palavras-chave: Anti-Müllerian hormone (AMH); Cryptorchidism; Equine; Testis.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4151
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Seasonal changes in serum progesterone levels in Thoroughbred racehorses in training OAK
TAKAHASHI, Yuji; AKAI, Makoto; MURASE, Harutaka; NAMBO, Yasuo.
The objective of the present study was to verify the seasonal luteal activity of racehorses in training in Japan from March to August. We allocated 102 horses into a luteal activity group and non-luteal activity group. The luteal activity group included horses with serum progesterone levels that were consistently >1 ng/ml and changed by ± 1 ng/ml. In contrast, the progesterone levels of the non-luteal activity group were consistently <1 ng/ml. In late spring (from May 1 to June 30) and summer (from July 1 to August 31), the percentage of horses in the luteal activity group was significantly higher than in early spring (from March 1 to April 30, P<0.01). These findings demonstrate clear seasonal variations in ovarian activity. The present study...
Palavras-chave: Racehorse; Progesterone; Seasonal change.
Ano: 2015 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4290
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