Septic periorchitis in a horse   总被引：1，自引：0，他引：1  

J Belknap  W Arden  B Yamini 《Journal of the American Veterinary Medical Association》1988,192(3):363-364

A 2-month-old Standard-bred colt with signs of abdominal pain and large scrotum was found to have septic periorchitis involving the right testis. Surgical exploration of the abdomen and scrotum was performed; the colt was then castrated. Actinobacillus equuli was isolated from specimens obtained at surgery. The colt was treated with broad-spectrum antibiotics and flunixin meglumine after surgery, and fully recovered. The clinical signs of periorchitis in the colt were similar to an inguinal/scrotal hernia.  相似文献   

An immunohistochemical study of plasma albumin extravasation in the brain of mice after the administration of Clostridium perfringens type D epsilon toxin     

JW FINNIE  P. HAJDUK 《Australian veterinary journal》1992,69(10):261-262

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Economics of feeding corn silage versus corn grain to beef steers as affected by interest rates,liquidity preference and opportunity cost of capital     

C. Arden Pope  Earl O. Heady 《Agricultural Systems》1983,10(2):65-74

This study uses a linear programming (LP) model to incorporate interest rates, liquidity preference and opportunity cost of capital into a decision making process for a beef producer. It is concluded that interest rates significantly affect the returns to labour and management, but, even when liquidity preferences and opportunity cost of capital are considered, extremely high interest rates would be required before it would be more economical to feed a high corn grain ration versus a high corn silage ration.  相似文献   

Plasma beta-endorphin and adrenocorticotrophin in young horses in training     

RN McCARTHY  LB JEFFCOTT  JW FUNDER†  M FULLERTON†  IJ CLARKE† 《Australian veterinary journal》1991,68(11):359-361

A controlled period of submaximal exercise on a treadmill was used as a standardised stress test in 6 young horses to monitor the effects of training. Circulating plasma concentrations of immunoreactive beta-endorphin (IR beta-EP) were measured before, during and after the exercise period. The stress test was conducted on 3 occasions during an intensive training program lasting 14 weeks. In week 3 a marked increase in plasma IR beta-EP (P = 0.003) was demonstrated as a result of training, but by the last exercise test performed in week 9 no significant increase in plasma IR beta-EP concentrations could be detected. During the training period the basal concentrations of plasma IR beta-EP significantly decreased (P = 0.0059). Plasma adrenocorticotrophin (ACTH) did not increase during exercise, although there was a trend of decreasing basal plasma ACTH by the end of the training period. It was concluded that a standardised work test acted as a mild stress to unfit horses, but as the horses' fitness increased the hormonal response to exercise diminished. Basal plasma beta-EP concentrations were decreased with increasing fitness.  相似文献   

Effects of antibiotic therapy at drying off on mastitis in the dry period and early lactation     

JW BROWNING  GA MEIN  M. BARTON  TJ NICHOLLS  P. BRIGHTLING 《Australian veterinary journal》1990,67(12):440-442

Four strategies for selecting cows for intramammary therapy with benzathine cloxacillin at drying off were compared in 12 Victorian dairy herds. The bacteriological status of all quarters of all (1044) cows was determined just before drying off, within 2 d of calving, and again 3 to 5 months after calving. All cases of clinical mastitis (from calving to mid-lactation) were recorded. Cows not infected at drying off were allocated randomly to 2 subgroups of approximately 350 cows each: not infected, not treated (NI-NT), or not infected, all quarters treated (NI-AT). New infection rates in the dry period (3.8% for NI-NT vs 2.1% for NI-AT) and in early lactation (4.1% for NI-NT vs 3.9% for NI-AT) were low and these differences were not significant. Incidence of clinical mastitis in early lactation was almost 50% higher for the treated group of uninfected cows compared with the untreated group (0.05 less than p less than 0.1). Cows infected in one or more quarters at drying off were split randomly into 2 subgroups of approximately 170 cows each: infected, all quarters treated (I-AT), or infected quarters treated only (I-QT). The new infection rate during the dry period was nearly 4 times higher for I-QT (15.3%) due to significantly more new infections by Staphylococcus aureus and Streptococcus uberis.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Eclogitic diamond formation at jwaneng: No room for a recycled component   总被引：4，自引：0，他引：4  

P Cartigny  JW Harris  M Javoy 《Science (New York, N.Y.)》1998,280(5368):1421-1424

Eclogitic diamonds have a large range of delta13C values, whereas peridotitic diamonds do not. Paired delta15N-delta13C-N variations in 40 eclogitic diamonds from the Jwaneng kimberlite in Botswana show that neither the influence of recycled biogenic carbon nor the global and primordial heterogeneity of mantle carbon are likely for the origin of the large delta13C range; the data instead support a fractionation process. It is proposed that carbonatitic mantle melts from which diamonds crystallize undergo different evolutions before diamond precipitation, when percolating through either a peridotite or an eclogite. These different evolutions, reflecting the presence or absence of olivine, can account for their respective delta13C distributions.  相似文献   

Congenital biliary atresia and jaundice in lambs and calves   总被引：2，自引：0，他引：2  

PAW HARPER  JW PLANT†  DB UNGERS‡ 《Australian veterinary journal》1990,67(1):18-22

An outbreak of congenital biliary atresia and jaundice is described, in which approximately 300 crossbred lambs and 9 crossbred calves died. The affected animals failed to thrive, developed jaundice and white scours and died within 4 weeks of birth. A common feature of this outbreak and a similar occurrence 24 years previously was the grazing of plants growing on the exposed silt foreshores of Burrinjuck Dam by ewes and cows in the early stages of pregnancy. Epidemiological and pathological findings suggested that a toxic insult to the foetus in early gestation caused choledysgenesis and biliary atresia, leading to diffuse, subacute to chronic cholangiohepatopathy and cirrhosis.  相似文献   

Strategies for mastitis control: dry cow therapy and culling     

JW BROWNING  GA MEIN†  P. BRIGHTLING†  TJ NICHOLLS†  M. BARTON† 《Australian veterinary journal》1994,71(6):179-181

SUMMARY The effects of three selection strategies for dry cow therapy on prevention of new infections and rate of antibiotic usage were compared. Quarter infection status of 1044 cows in 12 herds was determined by bacteriological methods at drying off, calving and three to five months into the following lactation. Cows that were uninfected at drying off were randomly allocated to treatment (whole udder, dry cow therapy) and non-treatment groups. Infected cows were randomly allocated to whole udder or infected quarter only treatments. The strategies compared were blanket treatment (treat all quarters of all cows), selective cow treatment (treat all quarters of any cow infected in one or more quarters) and selective quarter treatment (treat infected quarters only). Selective cow treatment was identified as the preferred strategy. Blanket treatment resulted in increased antibiotic usage (15.5 vs 6.4 tubes per infection eliminated) with no additional benefit, and selective quarter treatment resulted in a higher new infection rate (6.4%vs 3.9% quarters) in the dry period. The prevalence of infection within a herd at drying off had no influence on new infection rates in the dry period or early lactation. The cure rate after dry cow treatment (mean of 66%) decreased significantly with increasing age (P < 0.001). Cows infected in the previous lactation contributed over 76% of infections at calving and nearly 70% at mid-lactation. To lower the incidence of mastitis in a herd, a greater emphasis on culling of older infected cows and prevention of new infections during lactation is needed.  相似文献   

Corynetoxin poisoning in sheep in the south-east of South Australia associated with annual beard grass (Polypogon monspeliensis)     

JW FINNIE 《Australian veterinary journal》1991,68(11):370-370

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Mark L. Morris,Sr., DVM pioneer and innovator     

Gillespie AJ 《Veterinary heritage : bulletin of the American Veterinary History Society》2002,25(1):7-11

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