Serotypes of Erysipelothrix rhusiopathiae in Australian pigs, small ruminants, poultry, and captive wild birds and animals   总被引：1，自引：0，他引：1  

GJ EAMENS  MJ TURNER  RE CATT 《Australian veterinary journal》1988,65(8):249-252

Serotypes of 93 Australian isolates of Erysipelothrix rhusiopathiae from diseased domestic animals and poultry and a variety of captive wild birds and animals were determined by double diffusion gel precipitation. Two isolates, from the faeces of a swallow were also examined. Serotypes 1a, 1b and 2 were isolated from pigs and serotypes 1a, 1b, 2, 5, 15 and 21 from sheep or goats. Erysipelas in poultry was attributed to serotypes 1b, 5, 15 and 16. In captive wild birds serotypes 1b, 5, 6, 8, 14, 21 and an isolate reactive with antiserum to strain Seehecht were associated with septicaemic deaths. Single isolates from tissues of a bilby (Macrotis lagotis), black rat (Rattus rattus), brown snake (Pseudechis australis) and a bandicoot (Isoodon macrouris) were classified as serotypes 4, 4, 7, and 10 respectively. Six isolates were not able to be typed. Serotype 1b was the most widely distributed and most common (28%), being associated with disease in pigs, sheep, poultry and wild birds. Serotypes 1a or 2 were found in a more restricted range of animals, being commonly associated with erysipelas in pigs, less commonly in sheep and infrequently in other species. From diseased pigs, 26 of 33 isolates (79%) were serotypes 1a and 1b.  相似文献   

The development of a screening method to estimate contact toxicity of pyrethroids against wood-boring marine crustacea,Limnoria spp.     

Donald Rutherford  Richard C. Reay  Martyn G. Ford 《Pest management science》1979,10(6):527-530

A bioassay method has been developed for the screening of pyrethroids for contact toxicity against Limnoria species which should prove suitable for insecticides with low water-solubility. Less than 1% of a topically applied dose of cypermethrin (4.8 ng per isopod) was lost to the sea-water from the body surface; the pharmacokinetics of cypermethrin in the isopod accounted for the fate of the remainder. LD₅₀ parameter estimates obtained by this method represent measurements of absolute toxicity; NRDC 161^b proved the most effective of three pyrethroids tested.  相似文献   

Ovarian follicular changes after weaning in sows.     

J H Killen  R K Christenson  J J Ford 《Journal of animal science》1992,70(9):2801-2808

Three experiments investigated ovarian follicular development in sows whose litters were weaned at 28 to 31 d of lactation. Unilateral ovariectomy near the time of weaning was used to assess early follicular characteristics and to identify those sows that would not return to estrus within 10 d after weaning. This allowed segregation of and exclusion from the study those sows that had a prolonged interval from weaning to first estrus. In Exp. 1, 82 and 72% of the large follicles that were marked at 48 or 72 h after weaning (10 sows per time point) were subsequently identified as corpora lutea. In Exp. 2, sows (seven to nine per time point) were unilaterally ovariectomized at 0, 6, 12, 18, 24, or 48 h after weaning, and follicular fluid was evaluated for changes in steroid concentrations. Progesterone concentrations in fluid from medium-sized (4 to 6 mm) follicles increased by 6 h after weaning and then declined through 24 h concomitant with increases in testosterone and estradiol. For Exp. 3, follicular fluid and granulosa cells from individual follicles were obtained from sows (seven to nine per time point) at 0, 6, and 24 h after weaning. In follicular fluid, insulin-like growth factor I (IGF-I) concentrations were not correlated (P greater than .05) with concentrations of progesterone, testosterone, or estradiol, or with granulosa cell production of estradiol during culture in androstenedione-supplemented medium.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Effect of pretreatment with hepatic microsomal enzyme inducers on the toxicity of diazinon in calves     

E B Abdelsalam  E J Ford 《Research in veterinary science》1986,41(3):336-339

The pretreatment of calves with a single dose of 10 mg kg-1 dieldrin or 21 daily doses of 10 mg kg-1 phenobarbitone increased the toxicity of diazinon as reflected by the development of more severe clinical signs and greater depression in whole blood cholinesterase activity in the pretreated calves. Induction by dieldrin or phenobarbitone of the hepatic microsomal enzyme amidopyrine-N-demethylase was also accompanied by a concurrent rise in the liver carboxylesterase activity.  相似文献   

Postweaning growth, feed efficiency and chemical composition of sheep as affected by prenatal and postnatal testosterone     

T G Jenkins  J J Ford  J Klindt 《Journal of animal science》1988,66(5):1179-1185

Data were collected from intact males, castrated males and ewe lambs to investigate the effect of presence or absence of testosterone prenatally and during the postweaning period on postweaning growth, feed intake and carcass chemical composition. Half the lambs from each sex were the progeny of dams that had received five injections of testosterone cyprionate from d 32 through d 87 of gestation. Linear contrasts were used to detect differences. Postweaning daily gain of intact males was greater (P less than .01) than that of male castrates. Ewe lambs from treated dams had approximately 12% greater rate of growth (P less than .04) than ewe lambs from control dams. Ewe lambs from dams that had been treated were 28% more efficient (P less than .01) in the conversion of food to weight than those from untreated dams. Ewe lambs from treated dams had heavier livers (P less than .07). Carcass protein for intact males was greater (P less than .11) than for castrates, and extractable fat was less (P less than .05). Masculinization of growth characteristics of ewe lambs affected the quantity of carcass fat relative to control ewes (7.59 vs 8.92 kg). These ewe lambs also had more water in the carcass than did the control ewes (13.93 vs 12.29 kg). Administration of exogenous testosterone to pregnant ewes over an interval of time approximating time of sexual differentiation in the fetus enhances postweaning growth rate, feed conversion efficiency and chemical composition of genetic females.  相似文献   

Common Conditions Encountered in Race Horses          下载免费PDF全文

Ford W 《The Canadian veterinary journal. La revue veterinaire canadienne》1960,1(12):520-523

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Domestic resource costs and development policy: The case of Guyana's milk supply sector     

J.R.D. Ford  T.K. White 《Agricultural Systems》1984,15(2):57-77

This paper contributes to recent efforts to include foreign exchange considerations in sub-sector analysis. In evaluating the comparative advantage of producing milk in Guyana it employs the analytical frameworks of herd simulation, linear programming and domestic resource cost analysis. The study demonstrates that Guyana can save foreign exchange by producing milk domestically and that the milk production drive should be concentrated in the coastal areas involving private farmers, rather than the present policy of emphasizing public sector dairies in interior areas.  相似文献   

Prey-Predator Transmission in the Epizootiology of Ovine Sarcosporidiosis     

G. E. Ford M.V.Sc.  Ph.D. 《Australian veterinary journal》1974,50(1):38-39

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The ruminant liver   总被引：1，自引：0，他引：1  

E J Ford 《The Veterinary record》1965,77(50):1507-1516

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Osteochondrosis of the elbow: a review of the pathogenesis and a new approach to treatment     

MJ THOMSON  GM ROBINS 《Australian veterinary journal》1995,72(10):375-378

SUMMARY To test the hypothesis that joint incongruity contributes to the pathogenesis of elbow osteochondrosis, the left and right radius and ulna of 20 young large breed dogs were measured to determine any variation in length and to observe any incongruity of the elbow joint. Both lame and normal dogs were included in the study. Nine of the 20 dogs had marked disparity in radial and ulnar lengths yet only one had obvious elbow joint incongruity. The use of a sliding osteotomy for the treatment of fragmented coronoid process and a lengthening osteotomy for the treatment of an ununited anconeal process is also discussed. All four dogs treated with a sliding osteotomy showed a marked clinical improvement, and two of the three dogs treated with a lengthening osteotomy showed radiographic fusion of the anconeal process.  相似文献