Partial costectomy for tracheal collapse and stenosis associated with perinatal rib fracture in three Japanese Black calves.

2.3-month-old (Case 1), one-month-old (Case 2) and 6-month-old (Case 3), Japanese Black calves presented with mild to severe wheezing. All calves had histories of dystocia at birth with breech presentation.

Effects of AI protocol and time interval from onset of estrus to AI on conception rate in Japanese Black cows.

Two different artificial insemination (AI) protocols were investigated to determine the effect of the time interval from the onset of estrus (as detected by a pedometer) to the AI on the conception rate in Japanese Black cows. Seventy-three cows were divided into two groups that received AI either after the induction of synchronized ovulation (synchronized AI group; n = 26) or at the time of observed estrus (control AI group; n = 47). Each group was further divided into two subgroups, which were artificially inseminated either 0-12 h (early AI group; n = 21) or 12-24 h (late AI group; n = 52) after the onset of estrus.

Paralytic ileus and subsequent death caused by enteric parasite, Strongyloides papillosus, in Mongolian gerbils.

Adult worms of Strongyloides papillosus were surgically implanted into the duodenum and successfully established in Mongolian gerbils (Meriones unguiculatus). These worms persisted in the small intestine for at least four days after implantation. Following decreased fecal output, however, increased death rate and decreased survival time were observed.

Efficacy of intravaginal progesterone administration combined with prostaglandin f(2alpha) for cystic ovarian disease in Japanese Black cows.

The objective of this study was to investigate cystic ovarian disease (COD) in commercial Japanese Black cows and to evaluate the efficacy of 7-day insertion of an intravaginal progesterone insert (CIDR) combined with prostaglandin F(2alpha) (PGF(2alpha)) at CIDR removal. Experiment 1 was conducted to group cysts into 4 patterns based on alteration of plasma progesterone (P(4)) concentrations on d -7 and d 0 (=CIDR insertion) with 1.0 ng/ml as the cut-off level by ultrasonographic examination of 28 cows with COD that were >or=40 days postpartum and anoestrous after calving.