Effects of α₂-adrenergic drugs on blood platelets in sheep     

L. Papazoglou  D. Raptopoulos  M. Kritsepi  A. Galatos 《Veterinary anaesthesia and analgesia》1993,20(1):30-31

Xylazine (0.2 mg/kg, iv) alone or preceded by atipame-zole (0.125 μg/kg, iv) or by aspirin (10 μg/kg, iv) was administered to 18 sheep. Medetomidine (60 μg/kg, iv) was also administered to 12 sheep. Xylazine, but not medetomidine, significantly reduced the number of platelets. Both atipamezole and aspirin prevented this reduction. It was concluded that α₂-agonists would seem to produce platelet aggregation that may contribute to the development of the respiratory changes that follow the administration of α₂-agonists in sheep, but probably not always to a degree that could result in a significant decrease in the number of circulating platelets.  相似文献   

The internet and the future of equine practice.     

L A Wyant 《Veterinary Clinics of North America: Equine Practice》2001,17(2):297-303

The Internet is a fast-growing technology that allows information (text as well as images) to be shared across the world in an instant. As computer systems, software, and Internet services become less expensive options, the world becomes more experienced and comfortable with these technologies. In the foreseeable future, equine veterinarians are likely to be better educated about diseases and treatments, better connected with specialists for consultations on difficult cases, able to respond to client communications more efficiently, able to accurately educate clients, and able to communicate with colleagues from across the country and the world. Additionally, there is likely to be a time when using the Internet and computers is profitable in all these ways as well as economically. Improving doctor-client relationships and patient care are goals for all veterinarians, and the Internet holds the technology to render these now and in the future.  相似文献   

Feline leukemia virus detection by immunohistochemistry and polymerase chain reaction in formalin-fixed, paraffin-embedded tumor tissue from cats with lymphosarcoma.          下载免费PDF全文

M L Jackson  D M Haines  S M Meric    V Misra 《Canadian journal of veterinary research》1993,57(4):269-276

The prevalence of feline leukemia virus (FeLV) antigen and DNA was assessed in formalin-fixed, paraffin-embedded tumor tissues from 70 cats with lymphosarcoma (LSA). Tissue sections were tested for FeLV gp70 antigen using avidinbiotin complex (ABC) immunohistochemistry (IHC); DNA was extracted and purified from the same tissue blocks for polymerase chain reaction (PCR) amplification of a 166 base pair region of the FeLV long terminal repeat (LTR). Results were related to antemortem FeLV enzyme-linked immunosorbent assay (ELISA) for serum p27 antigen, anatomic site of LSA, and patient age. Viral DNA was detected by PCR in 80% of cases and viral antigen by IHC in 57% of cases. Seventeen cases were PCR-positive and IHC-negative; one case was PCR-negative and IHC-positive. Clinical records included FeLV ELISA results for 30 of 70 cats. All 19 ELISA-positive cats were positive by PCR and IHC; of the 11 ELISA-negative cats that were negative by IHC, seven were positive by PCR. When evaluated according to anatomic site, FeLV DNA and antigen were detected less frequently in intestinal LSAs than in multicentric and mediastinal tumors. Lymphosarcoma tissues from cats < 7 yr were several fold more likely to be positive for FeLV antigen by IHC than were tumors from cats > or = 7 yr. However, there was no significant difference in PCR detection of FeLV provirus between LSAs from cats < 7 yr and those > or = 7 yr.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

Necropsy findings from Vietnamese potbellied pigs, 33 cases.     

L W Pace  J M Kreeger  M A Miller  S E Turnquist  J R Fischer  G C Johnson  J R Turk  L L Pittman  W H Fales  C W Maddox 《Journal of veterinary diagnostic investigation》1992,4(3):351-352

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A BOOST TECHNIQUE FOR IRRADIATION OF MALIGNANT CANINE NASAL TUMORS     

Donald E.  Thrall  DVM  PHD  Margaret C.  McEntee  DVM†  Carol  Novotney  DVM†  Marlene L.  Hauck  DVM† Rodney L.  Page  DVM  MS† 《Veterinary radiology & ultrasound》1993,34(4):295-300

Eighteen dogs with malignant nasal cavity tumors were treated with radiation therapy, including a boost technique. Three 3:0 Gy boost doses were added to a treatment protocol consisting of sixteen 3.0 Gy daily fractions, bringing the total dose to 57 Gy. This boost technique was implemented without an associated increase in overall treatment time by giving the boost doses on a twice-a-day basis. Boost doses were given during the first half of the radiation therapy period. The treatment was completed as planned in 16 of the 18 dogs; two dogs received lower doses (51 and 54 Gy). Median survival was 177 days, poorer than in some other reported studies of nasal tumor irradiation. Acute effects were unacceptable, with 11 of the 18 dogs developing severe mucositis, desquamation, edema, swelling, and pruritus. The extensive nature of the acute reactions compromised assessment of the effect of the increased radiation dose on the tumor. Although there is justification for assessing more aggressive radiation protocols in canine nasal tumor patients, total doses approximating 60 Gy can not be given as described because of the inability of acutely responding normal tissues to compensate.  相似文献   

几种因素对培养小鼠精原干细胞的影响   总被引：13，自引：1，他引：12  

张学明  李子义  赖良学  文兴豪  李德雪  岳占碰  杜惜明 《中国兽医学报》2001,21(5):497-500

探讨了小鼠胚胎成纤维细胞饲养层及干细胞因子(SCF)、白血病抑制因子(LIF)、碱性成纤维细胞生长因子(bFGF)等对体外培养小鼠精原干细胞的作用.结果显示,在饲养层上,精原干细胞贴壁时间缩至8～12 h,饲养层具有促进其分裂增殖的作用;培养液中加入不同浓度的SCF、LIF及bFGF,可延长精原干细胞在体外的存活时间,其中加入30μg/LSCF后,其体外存活时间与对照组相比差异显著(P<0.05).  相似文献   

Teratogenicity testing of BI 58 EC (38% dimethoate) in chicken embryos with special respect to degradation of the active ingredient.     

L Várnagy  P Budai  E Molnár  I Füzesi  T Fáncsi 《Acta veterinaria Hungarica》2001,49(3):355-361

The insecticide formulation BI 58 EC was tested for teratogenicity in chicken embryos, with particular reference to degradation of the active ingredient (dimethoate) after the treatment of embryonated eggs. The pesticide was diluted in water to a concentration level of 0.8%, and the emulsion was injected into the air space in a volume of 0.1 ml/egg, or hen's eggs were treated by the immersion technique. Residues of dimethoate were measured in the samples on days, 13, 15 and 19 of the incubation of chicken embryos, and morphological examinations were performed simultaneously. Analytical chemistry data indicated a slower degradation of dimethoate in embryos after the immersion of eggs, and cyllosis was remarkable in this group among the sporadic developmental anomalies. The liver tissues of both treated groups exhibited severe fatty infiltration.  相似文献   

Antibiotic resistance in avian bacteriological isolates.     

D L Williams  J L Newman 《The Veterinary record》2001,148(24):748-750

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Rabies virus infection in Aedes pseudoscutellaris cells: a study on receptorial structures     

L Seganti  F Superti  L Sinibaldi  M Marchetti  S Bianchi  N Orsi 《Comparative immunology, microbiology and infectious diseases》1991,14(3):265-275

Rabies virus is able to infect in vitro a wide range of homeothermic and poikilothermic cells but little is known about its multiplication in arthropod cells. In this research the infection of rabies virus in Aedes pseudoscutellaris cells, a mosquito cell line susceptible to mosquito-borne viruses, was studied. After 60 days of incubation at 26 degrees C up to 70% of infected cells showed the synthesis of both viral nucleocapsid and envelope antigens, although viral yield and cell damage could not be detected. Research performed in order to investigate the role of membrane carbohydrate moieties in rabies virus-mosquito cell interaction suggested the participation of galactose and N-acetylglucosamine whereas sialic acid, known to be a rabies binding site in many homeothermic cell lines, was not involved.  相似文献   

鼻气管鸟杆菌对鸡的感染及其防制     

程思明  任文雁  Peter De Herdt 《国外畜牧学(猪与禽)》2002,(1):50-52

鼻气管鸟杆菌发现于 1 990年 ,自那时以来已在世界范围内被公认为一种呼吸道病原菌 ,可在肉用鸡引起原发感染或继发感染。对种鸡进行免疫接种是减轻鼻气管鸟杆菌所致经济损失的有效方法。  相似文献