Japanese Shorthorn Research Articles

Perocormus associated with segmental aplasia of the cervical spinal cord in a Japanese Shorthorn calf

A rare case of perocormus associated with segmental aplasia of the cervical spinal cord in a Japanese Shorthorn calf is reported. The severe reduction of body length with normal extremities combined to produce so the called “elk calf” appearance. Other associated malformations included hypoplasia of the lung, anorectal agenesis and a lobulated spleen.

正常牛ならびに四塩化炭素投与肝障害牛におけるBSP試験について

Bromsulphalein half life (BSP-t/2) with fractional clearance (K value) was investigated in cattle by a modification of the method previously reported by the present authors. Mean biological BSP-t/2 value (minutes) of 23 dairy cows (Holstein) and 21 beef cattle (Japanese Shorthorn) was 3.31 min [range of 95% confidence limit (CL): 2.74-3.88 min] and 3.53 min (2.76-4.30) with K value 20.9%/min (range of 95% CL: 17.9-25.3%/min) and 19.6 (16.1-25.1). Each clearance curve plotted in mean BSP concentration of two cattle groups was related to time until 12 min after injection, rectilinearly. The cattle examined were confirmed to reveal no abnormality in the activities of serum enzymes reflecting liver function. plasma concentration of lipids and albumin-globulin ration of serum.On the other hand, BSP-t/2 values and K values in 5 cows with liver disturbance due to CCl4 intoxication showed progressively changes and exhibited a significantly high correlation between the values of BSP percent retention (BSP-PR), enzyme activities and lipid concentration in serum, and triglyceride (TG) and glycogen (GL) contents in biopsy specimens. Degree of diffused liver lesion (hepatosis) was estimated from biological and morphological findings of each specimen examined, and classified into four types relative to BSP-t/2 values for each type. BSP-t/2 values indicated higher value in, the values before CCl4 administration, inactivated type of chronical hepatosis, activative chronical hepatosis, acute hepatosis and fulminant hepatosis. No overlap within the 95% range CL of any type of hepatosis was recognized.

1985年から1986年にかけて岩手県に多発したアカノミネ病

An epizootic of Akabane disease of cattle occurred throughout the Iwate Prefecture. The total number of affected calves was 6, 533 from August in 1985 to June in 1986. This was an incidence rate of 8%. Japanese Shorthorn calves were especially affected with the high incidence rate of 32%. In the present Akabane outbreak abortion was less frequent, without an apparent peak in occurrence. The predominant lesion of the affected calves was hydranencephaly, and arthrogryposis, either by itself or in combination with hydranencephaly, was less frequent.

日本短角種の直接検定における給餌法の改訂

日本短角種の直接検定における給餌法の改訂

黒毛和種, 日本短角種およびホルスタイン種去勢肥育牛の骨および筋肉の発育と枝肉中分布

黒毛和種, 日本短角種およびホルスタイン種去勢肥育牛の骨および筋肉の発育と枝肉中分布

Statiscal Analysis of Data on Grazing Japanese Shorthorn Cattle

Data on four blood samples of examination were obtained from a cumulative total of 1, 083 grazing cattle of the Japanese Shorthorn breed of a cumulative total of 14 herds examined over a period from 1980 to 1982. They were used for the investigation of normality and logarithmic normality of the distribution pattern of these items. In this investigation, the statistically abnormal values of logarithm and anti-logarithm detccted for each item of examination in each herd in the previovs experiment reported were first discarded from the data for analysis to be done in the present experiment. Then the data of examination in each herd were divided into those of logarithm and those of anti-logarithm, and subjected to the follo!ing three tests of normality: a test by the goodness of hit, a test at a degree of deviation of zero and a degree of pointedness of 3, and a test by observation of a normal probability sheet. As a resulo, it was concluded that the blood magnesium concentration and the hematocrit value showed almost a normal pattern of distribution, the blood calcium concentration an approximately normal pattern of distribution, and the leukocyte count almost a logarithmic normal pattern of distribution.

Statiscal Analysis of Data on Grazing Japanese Shorthorn Cattle

Blood samples were collected from a cumulative total of apparently healthy 1, 083 grazing cattle of the Japanese Shorthorn breed of a cumulative total of 14 herds. They were used to estimate the blood calcium and magnesium concentrations, hematocrit value, and leukocyte count. The results obtained were illustrated. Then an attempt was made to detect statistically abnormal values of logarithm and anti-logarithm for each item of examination in each herd. In addition, a fundamental statistic value was determined for each item of examination in each herd after discarding statistically abnormal values of anti-logarithm.

Recurrence of estrus and the variations in levels of plasma progesterone after parturition in Japanese Shorthorn cows.

Recurrence of estrus and the variations in levels of plasma progesterone after parturition in Japanese Shorthorn cows.

日本短角種ならびに黒毛和種雌牛の発育に関する考察

日本短角種ならびに黒毛和種雌牛の発育に関する考察

A Preliminary Report on Plasma Insulin Concentrations on Japanese Shorthorn and Japanese Black Cattle from Birth to 8 Weeks of Age

TRENKLE1) described in the review that basal plasma insulin levels were 15-50μU/ml in cattle. YOUNG et al.2) found no significant relationship between insulin level and age. IRVIN and TRENKLE3) reported that plasma insulin levels could not be related to age or breed in cattle from 18 to 371 days of age. At 371 days, steers had higher levels of plasma insulin than heifers. These increased levels in the steers were reasonably related to the consumption of finishing rations rather than age or sex.At present, however, no report is available about plasma insulin levels of Japanese Shorthorn and Japanese Black Cattle. The purpose of this study was not obtain basic data of plasma insulin concentrations in calves of Japanese Shorthorn and Japanese Black Cattle and to see whether the results obtained in other breeds can be held in these Japanese breeds or not. In this study, young sucking calves which were not fed with rations were used to investigate the breed difference of plasma insulin levels, as it was known that insulin levels of adult calves were influenced by feeding rations3).