Theileria parva: the immune status of calves born of dams immunised against East Coast fever     

M P Cunningham  C G Brown  M J Burridge  S P Morzaria  G M Urquhart 《Research in veterinary science》1989,46(1):90-94

Eight Friesian cross cows three months pregnant to a single Friesian bull were immunised against East Coast fever by infection with Theileria parva (Muguga) sporozoite stabilate and treatment with pyrrolidino-methyl tetracycline. They were challenged with the homologous stock four times before calving and a fifth time after calving, and resisted all five challenges which killed all of the five groups of five susceptible controls. Calves born to these hyperimmunised dams were fully susceptible on challenge with the same stabilate, as were susceptible cows from the same farm and their calves. In both instances the calves died three to seven days earlier than the cows which were approximately 10 times heavier. These results show that one- to two-month-old taurine calves from artificially immunised dams are not protected from experimental T parva sporozoite challenge and that there is no inherent calfhood resistance to East Coast fever.  相似文献   

Gonadotrophin-releasing hormone treatment in cattle: a meta-analysis of the effects on conception at the time of insemination   总被引：1，自引：0，他引：1  

WF MORGAN  IJ LEAN 《Australian veterinary journal》1993,70(6):205-209

SUMMARY Data from 40 trials described in 27 published papers were analysed by meta-analysis (pooling of data from numerous trials into a single analysis) to evaluate the effects of injecting gonadotrophin-releasing hormone (GnRH) In cattle at the time of Insemination on the risk of pregnancy. A total of 19 019 cows were involved In these studies. Analyses were stratified by trial and by the effects of dose of GnRH, type of GnRH and Insemination number (first, second or third and greater). Mantel-Haenszel analysis revealed that use of GnRH at Insemination significantly Increased the overall risk of pregnancy by 12.5% In treated cows (P < 0.05). However, Increases In risk of pregnancy were greatest (22.5%) when repeat breeders were treated. Results for use of GnRH or analogue at first service were similar, with Increased risks of pregnancy in treated cows of 5.2 and 8.0%, respectively. The risk of pregnancy tended to be higher (11.1%) when the dose of GnRH was 250 μg and when used at second Insemination (9.9%). The analyses demonstrated that while treatment at Insemination with GnRH and GnRH analogues Increased conception rates In dairy cattle, some variation In study results was attributable to the number of Inseminations after calving at which GnRH Is administered. Further efforts should be made to determine characteristics of populations of cows that have good fertility responses to GnRH and to determine the mode of action of GnRH in Increasing fertility. Meta-analysis proved to be a useful technique for evaluating the apparently conflicting results from trials and in evaluating the effect of factors such as Insemination number, dose and type of GnRH on responses to treatment.  相似文献   

Preductal aortic coarctation and patent ductus arteriosus in a Sumatran tiger (Panthera tigris sumatrae) cub.     

J A Barnes  L M Gerlis  A A Cunningham 《Journal of zoo and wildlife medicine》2001,32(1):111-114

Preductal aortic coarctation and patent ductus arteriosus are described in a neonatal Sumatran tiger, Panthera tigris sumatrae. Eight days postpartum, the cub appeared weak, and it was separated from the dam for hand rearing. On examination it was dehydrated and hypothermic. Despite treatment, the animal's condition worsened and the cub died 12 days postpartum. Gross postmortem and histologic examinations revealed a preductal aortic coarctation and patent ductus arteriosus with a patent foramen ovale and moderate dilatation of the right ventricle of the heart. Focal pneumonia and mild hepatitis were also present; however, diffuse pulmonary congestion and edema were considered to be the proximate cause of death.  相似文献   

Primary sulfates in atmospheric sulfates: estimation by oxygen isotope ratio measurements     

Holt BD  Kumar R  Cunningham PT 《Science (New York, N.Y.)》1982,217(4554):51-53

The relative amounts of primary and secondary sulfates in atmospheric aerosols and precipitation can be estimated from measurements of the stable oxygen isotope ratios. The oxygen-18 content of sulfates formed in power plant stack gases before emission into the atmosphere is significantly higher than that of sulfates formed from sulfur dioxide after emission. Results show that 20 to 30 percent of the sulfates in rain and snow at Argonne, Illinois, are of primary origin.  相似文献   

The half-life of bovine (incomplete) antibodies to Brucella abortus.     

B Cunningham 《The Veterinary record》1978,102(23):500-502

The half-life of bovine immunoglobulins was established in a group of 60 calves suckled on non-infected dams immunised with antigens to Brucella abortus. The half-life of the "incomplete antibody" as determined by the anti-bovine globulin test was 20.9 days. Up to 45 days, the mean half-life of antibodies in the calves was 17.1 days; from 46 to 99 days it was 21.1 days and for periods exceeding 100 days it was 24.4 days. In 39 calves born of and suckled on infected dams the mean half-life of antibodies was 22.4 days. Up to 100 days the figure was 19.5 days; over 100 days it was 22.8 days. There was no significant difference in the mean half-life of antibody between calves from infected and non-infected dams. In both cases the antibodies appear to be catabolised at a progressively slower rate.  相似文献   

Comparative properties of canine hepatic and pancreatic amylase     

Moore WE  Cunningham BA 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1976,5(1):11-12

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Observed flow compensation associated with the MOC at 26.5 degrees N in the Atlantic   总被引：3，自引：0，他引：3  

Kanzow T  Cunningham SA  Rayner D  Hirschi JJ  Johns WE  Baringer MO  Bryden HL  Beal LM  Meinen CS  Marotzke J 《Science (New York, N.Y.)》2007,317(5840):938-941

The Atlantic meridional overturning circulation (MOC), which provides one-quarter of the global meridional heat transport, is composed of a number of separate flow components. How changes in the strength of each of those components may affect that of the others has been unclear because of a lack of adequate data. We continuously observed the MOC at 26.5 degrees N for 1 year using end-point measurements of density, bottom pressure, and ocean currents; cable measurements across the Straits of Florida; and wind stress. The different transport components largely compensate for each other, thus confirming the validity of our monitoring approach. The MOC varied over the period of observation by +/-5.7 x 10(6) cubic meters per second, with density-inferred and wind-driven transports contributing equally to it. We find evidence for depth-independent compensation for the wind-driven surface flow.  相似文献   

The addition of mercury compounds to the fertilizer mixture as a control for common scab of the potato under Long Island conditions     

H. S. Cunningham 《American Journal of Potato Research》1936,13(4):100-103

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Effect of date and method of kill on yield,specific gravity and other quality factors of maine potatoes     

G. L. Terman  C. E. Cunningham  Michael Goven 《American Journal of Potato Research》1952,29(12):279-289

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Effect of soil reaction on the performance of certain scab-resistant and susceptible potato varieties     

J. H. Ellison  W. C. Jacob  H. S. Cunningham 《American Journal of Potato Research》1951,28(9):721-727

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