THE ISOLATION OF AKABANE VIRUS FROM A NORMAL BULL     

T. D. ST. GEORGE M.V.Sc.    DAISY CYBINSKI B.Sc.  N. I. PAULL B.V.Sc. 《Australian veterinary journal》1977,53(5):249-249

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THE ISOLATION OF EPHEMERAL FEVER VIRUS FROM MOSQUITOES IN AUSTRALIA   总被引：1，自引：0，他引：1  

T. D. ST. GEORGE  M.V.Sc.    H. A. STANDFAST  BSc.  A. L. DYCE  B.Sc.Agr. 《Australian veterinary journal》1976,52(5):242-242

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Biological control of Sclerotinia minor using a chitinolytic bacterium and actinomycetes   总被引：4，自引：0，他引：4  

K. A. El-Tarabily †  M. H. Soliman ‡  A. H. Nassar †  H. A. Al-Hassani  K. Sivasithamparam  F. McKenna  G. E. ST. J. Hardy 《Plant pathology》2000,49(5):573-583

Isolates of 85 bacteria and 94 streptomycete and 35 nonstreptomycete actinomycetes were obtained from a lettuce-growing field in Al-Ain, United Arab Emirates, on colloidal chitin agar, and screened for their ability to produce chitinase. Twenty-three bacteria and 38 streptomycete and 15 nonstreptomycete actinomycete isolates produced high levels of chitinase and were examined in vitro for their ability to suppress the growth of Sclerotinia minor , a pathogen causing basal drop disease of lettuce. The three most suppressive isolates were examined further for their production of β-1,3-glucanase and antifungal activity as well as their ability to colonize the roots and rhizosphere of lettuce in vitro and in planta . The three isolates, Serratia marcescens, Streptomyces viridodiasticus and Micromonospora carbonacea , significantly reduced the growth of S. minor in vitro , and produced high levels of chitinase and β-1,3-glucanase. Streptomyces viridodiasticus also produced antifungal metabolite(s) that significantly reduced the growth of the pathogen in vitro . When the pathogen was presented as the sole carbon source, all three isolates caused extensive hyphal plasmolysis and cell wall lysis. Serratia marcescens and St. viridodiasticus were competent to varying degrees in colonizing the roots of lettuce seedlings after 8 days on agar plates and the rhizosphere within 14 days in pots, with their competency being superior to that of M. carbonacea . All three isolates, individually or in combination, were antagonistic to S. minor and significantly reduced incidence of disease under controlled glasshouse conditions.  相似文献   

感染E.tenella对肉仔鸡生长、营养物质表观存留率及血液生理指标的影响   总被引：1，自引：0，他引：1  

贾振全  金岭梅  顾惠明  赵其平  赵枝新 《中国兽医寄生虫病》2000,(2)

为了研究玉米 -豆粕型基础饲养下感染球虫对肉仔鸡生长、营养物质表观存留率、血液生理指标的影响 ,用 48只 1周龄 ( AA)肉仔鸡进行试验 ,按体重随机分为 2组 ,代谢期 1周。试验组鸡 1 4日龄时分别感染柔嫩艾美耳球虫卵囊 9万个 /只。结果表明 :试验组除饲料转化比 ,在代谢期后 4天间有显著差异外 ,其余多数生长性能指标在两组间无显著差异 ( P>0 .1 )。但感染球虫降低了试验组鸡的营养物质的表观存留率  相似文献   

Direct experimental observation of cells in phenomic lag     

OGUR M  ST JOHN R  OGUR S 《Science (New York, N.Y.)》1959,129(3363):1612-1613

By employing cells mutating at a very high spontaneous rate and a grid plate containing a medium totally selective against mutant cells, direct microscopic observation was made of mutant cells of recent origin passing through a limited number of phenomic lag divisions.  相似文献   

Tetrazolium overlay technique for population studies of respiration deficiency in yeast     

OGUR M  ST. JOHN R  NAGAI S 《Science (New York, N.Y.)》1957,125(3254):928-929

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The separation of neuroblasts and other cells from grasshopper embryos     

ST AMAND GS  TIPTON SR 《Science (New York, N.Y.)》1954,119(3081):93-94

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Plasma Cortisol Concentrations after CIDR Insertion in Beef Cows     

ST Long  NC Thinh  M Yusuf  T Nakao 《Reproduction in domestic animals》2011,46(1):181-184

The objective of this study was to show plasma cortisol concentration after treatment with controlled internal drug release (CIDR) in non‐suckling beef cows. On day 9 after oestrus, two cows were inserted with CIDR into the vagina for 24 h and the other two cows were treated as a control group. Four days later, the two control cows were treated with CIDR and the other two CIDR‐treated cows were used as controls. Cortisol concentrations were determined by ELISA in plasma samples collected before, during and after insertion of CIDR. There was a significant increase in plasma cortisol concentrations (p < 0.01) after insertion of CIDR. Mean (±SEM) plasma cortisol concentrations increased from 1.3 ± 0.4 to a peak of 8.8 ± 1.1 ng/ml at 5 h and then decreased to basal concentrations at 7 h after insertion of the device. In conclusion, the insertion of intra‐vaginal device causes an increase in plasma cortisol concentrations in beef cows, although the pathophysiological significance of the elevation of cortisol is not known.  相似文献   

Adrenocortical Response in Cows after Intramuscular Injection of Long‐Acting Adrenocorticotropic Hormone (Tetracosactide Acetate Zinc Suspension)     

NC Thinh  C Yoshida  ST Long  M Yusuf  T Nakao 《Reproduction in domestic animals》2011,46(2):296-300

The objectives of this study were first to show adrenocortical response to a long‐acting adrenocorticotropic hormone preparation (tetracosactide acetate zinc suspension) (ACTH‐Z) and its effect on adrenocortical function in beef cows ( Experiment 1 ) and second to apply the ACTH‐Z challenge in dairy cows based on cortisol concentrations in milk collected at routine milking ( Experiment 2 ). In Experiment 1 , four beef cows in luteal phase were challenged with ACTH‐Z, and plasma cortisol concentrations were determined for 48 h after the injection at 30‐min to 2‐h intervals. A rapid ACTH test was conducted 3 days before and 2 h after the completion of ACTH‐Z injection for 48 h to investigate the effect on adrenocortical function. Plasma cortisol concentrations increased significantly 30 min after ACTH‐Z injection (p < 0.001), and the high cortisol levels were maintained for approximately 10 h after the injection. In Experiment 2 , eight dairy cows were subjected to ACTH‐Z challenge 1–2 weeks and 4–5 weeks post‐partum. Blood and milk samples were taken at morning and afternoon milking. All the cows showed a significant increase in cortisol concentrations in plasma as well as in skim milk 8 h after ACTH‐Z injection 1–2 weeks and 4–5 weeks post‐partum (p < 0.001). There was a significant correlation between plasma and skim milk cortisol concentrations 8 h after ACTH‐Z challenge (r = 0.74, p < 0.001). The results obtained in this study suggest that elevated levels of plasma cortisol are maintained for approximately 10 h after ACTH‐Z treatment without adverse effect on adrenocortical function and a long‐acting ACTH‐Z challenge based on cortisol concentrations in milk, which were collected at the morning and the afternoon milking, can be a useful tool to monitor adrenocortical function in cows.  相似文献   

NEEDLE-TRACT IMPLANTATION FOLLOWING US-GUIDED FINE-NEEDLE ASPIRATION BIOPSY OF TRANSITIONAL CELL CARCINOMA OF THE BLADDER, URETHRA, AND PROSTATE     

Thomas G.  Nyland  DVM  Seth T.  Wallack  DVM  Erik R.  Wisner  DVM 《Veterinary radiology & ultrasound》2002,43(1):50-53

Localized tumor implantation of the ventral abdominal wall was found at 2, 5, and 8 months following percutaneous ultrasound-guided fine-needle aspiration biopsy (FNAB) of transitional carcinoma of the bladder, urethra, or prostate in 3 dogs. To our knowledge this complication has not been reported in dogs following FNAB. Despite the rarity of needle-tract implantation, the potential for this complication with transitional cell carcinomas is apparently not negligible and warrants consideration. We recommend traumatic urethral catheterization to obtain a cytologic diagnosis of potential transitional cell carcinomas of the lower urinary tract or prostate whenever possible until more information becomes available. However, needle-track implantation is so rare that it should not influence the decision to perform a percutaneous FNAB if the urethra cannot be catheterized.  相似文献