The effects of bovine respiratory syncytial on normal ovine lymphocyte responses to mitogens or antigens in vitro     

Keles I  Sharma AK  Woldehiwet Z  Murray RD 《Comparative immunology, microbiology and infectious diseases》1999,22(1):1-13

In the present study peripheral blod mononuclear cells (MNC) obtained from normal uninfected lambs were used to study the possible effects of bovine respiratory syncytial virus (BRSV) on lymphocyte responses to the mitogens, phytohaemagglutinin (PHA), concanavalin A (Con A) and pokeweed mitogen (PWM) in vitro. Live BRSV had a depressive effect on the proliferative responses of normal MNC to PHA, Con A and PWM. Inactivated BRSV and a commercial preparation of prostaglandin E2 were also found to depress the proliferative responses of normal ovine MNC to PHA but recombinant tumour necrosis factor-alpha (TNF-alpha) had no such effect. Serum samples obtained from BRSV-infected lambs contained substances inhibitory to PHA-driven lymphocyte blastogenesis. Memory blastogenic responses to border disease virus (BDV) of lymyphocytes obtained from lambs previously primed with BDV were significantly reduced when lymphocytes were exposed to infectious BRSV.  相似文献   

Interference by the intracellular parasite Theileria parva with T-cell signal transduction pathways induces transformation and protection against apoptosis     

Dobbelaere D  Fernandez P  Machado J  Botteron C  Heussler V 《Veterinary immunology and immunopathology》1999,72(1-2):95-100

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Comparison of two surgical techniques for renal transplantation in cats     

Bernsteen L  Gregory CR  Pollard RE  Griffey SM  Menwrath V 《Veterinary surgery : VS》1999,28(6):417-420

OBJECTIVE: To compare two surgical techniques for renal transplantation in cats with respect to graft warm ischemia time, total surgical time, operative and postoperative complications, and return to normal renal function based on measurement of plasma creatinine concentrations. STUDY DESIGN: Research study using normal cats. ANIMALS OR SAMPLE POPULATION: Fourteen adult, feline leukemia virus and feline immunodeficiency virus (FELV/FIV) negative, neutered male and spayed female cats. MATERIALS AND METHODS: Fourteen cats underwent heterotopic renal isograft transplantation with nephrectomy of the contralateral kidney. Renal arterial end-to-end anastomosis to the external iliac artery was performed in eight cats and renal arterial end-to-side anastomosis to the aorta was performed in six cats. Cats were monitored for 14 days after surgery. Renal function was evaluated by daily measurement of plasma creatinine concentrations. The cats' health was assessed by the daily recording of body weight, rectal temperature, postoperative complications, urine production, appetite, packed red blood cell volume, and total serum protein. Ultrasonographic assessment of the isograft was performed every third day. Animals were euthanatized or adopted 14 days after surgery and histopathologic analysis of biopsies or whole isograft tissues was performed. RESULTS: Nine of fourteen cats survived the 14-day study period. Although not statistically significant, mean total surgical time and graft warm ischemia time was shorter for the arterial end-to-side anastomosis. Mean daily plasma creatinine concentrations were not significantly different between the two groups. Five of eight cats (62%) undergoing the arterial end-to-end technique developed neuropraxia and lameness of the ipsilateral pelvic limb. Five cats died or were euthanatized because of other complications. CONCLUSIONS AND CLINICAL RELEVANCE: The arterial end-to-side technique appears to be the better method for renal transplantation in cats. Shorter graft warm ischemia and total surgical times, absence of pelvic limb complications, and an adequate return to normal renal function were associated with this technique.  相似文献   

Indirect ELISAs based on recombinant and affinity-purified glycoprotein E of Aujeszky's disease virus to differentiate between vaccinated and infected animals   总被引：2，自引：0，他引：2  

Morenkov OS  Fodor N  Fodor I 《Acta veterinaria Hungarica》1999,47(1):137-150

Two indirect ELISAs for the detection of antibodies against glycoprotein E (gE) of Aujeszky's disease virus (ADV) in sera have been developed. The rec-gE-ELISA is based on the E. coli-expressed recombinant protein containing the N-terminal sequences of gE (aa 1-125) fused with the glutathione S-transferase from Schistosoma japonicum. The affi-gE-ELISA is based on native gE, which was purified from virions by affinity chromatography. The tests were optimised and compared with each other, as well as with the recently developed blocking gE-ELISA (Morenkov et al., 1997b), with respect to specificity and sensitivity. The rec-gE-ELISA was less sensitive in detecting ADV-infected animals than the affi-gE-ELISA (sensitivity 80% and 97%, respectively), which is probably due to the lack of conformation-dependent immunodominant epitopes on the recombinant protein expressed in E. coli. The specificity of the rec-gE-ELISA and affi-gE-ELISA was rather moderate (90% and 94%, respectively) because it was necessary to set such cut-off values in the tests that provided a maximum level of sensitivity, which obviously increased the incidence of false positive reactions. Though the indirect ELISAs detect antibodies against many epitopes of gE, the blocking gE-ELISA, which detects antibodies against only one immunodominant epitope of gE, showed a better test performance (specificity 99% and sensitivity 98%). This is most probably due to rather high dilutions of the sera used in the indirect gE-ELISAs (1:30) as compared to the serum dilution in the blocking gE-ELISA (1:2). We conclude that the indirect gE-ELISAs are sufficiently specific and sensitive to distinguish ADV-infected swine from those vaccinated with gE-negative vaccine and can be useful, in particularly affi-gE-ELISA, as additional tests for the detection of antibodies to gE.  相似文献   

The effects of cyclophosphamide and its uroprotective agents, mesna and hyperbaric oxygen, on urinary bladder motility in guinea pigs     

Sağmanligil V  Etlik O  Pişkin I  Tomur A 《Acta veterinaria Hungarica》1999,47(4):451-460

The aim of this research was to observe the effects of cyclophosphamide and its uroprotective agents, mesna and hyperbaric oxygen (HBO), on the motility of urinary bladder muscle in guinea pigs. In the experimental groups, mesna and cyclophosphamide were intraperitoneally injected at a dose of 21.5 mg/kg and 68.1 mg/kg, respectively. For the combination of mesna and cyclophosphamide, one dose of mesna was injected 20 min before cyclophosphamide administration and three additional injections of mesna were repeated every three hours. A total of 8 HBO exposures were performed at 2.8 ATA for 90 min twice daily for another experimental group. In the HBO and cyclophosphamide combined group 5 HBO exposures were given prophylactically before cyclophosphamide. The combination of mesna, HBO and cyclophosphamide was administered by the same procedure. The contractions obtained in response to acetylcholine (ACh, 10(-4) M) in the control group were reduced using cyclophosphamide and HBO individually, but not by mesna. However, the contractions belonging to the various combinations of these three agents were not different from those seen in the control group. On the other hand, the combinations of cyclophosphamide, mesna and HBO showed higher responses to ACh than the groups in which cyclophosphamide and HBO were used individually, while the responses elicited by the cyclophosphamide and HBO combination were greater than those seen in the group treated with HBO only.  相似文献   

Observations on the quasispecies composition of three animal pathogenic RNA viruses     

Kiss I  Ros C  Kecskeméti S  Tanyi J  Klingeborn SB  Belák S 《Acta veterinaria Hungarica》1999,47(4):471-480

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Relationships between bulk-tank antibodies to Ostertagia ostertagi and herd-management practices and measures of milk production in Nova Scotia dairy herds     

Guitián FJ  Dohoo IR  Markham RJ  Conboy G  Keefe GP 《Preventive veterinary medicine》1999,47(1-2):79-89

Monthly bulk-tank milk samples were obtained from 415 Nova Scotia dairy herds in each of the months of July-September 1998 and tested using an indirect microtitre ELISA against a crude saline-extract, whole-worm Ostertagia ostertagi antigen. ELISA results (optical densities (ODs)) were consistent across months (r=0.85) but there was considerable variation among herds. A questionnaire was sent by mail to all producers; information on management factors that would potentially influence parasite burdens in the herds was obtained from 239 farms. Data on annual milk production, summer milk production (July-September) and seasonal decline in milk production were obtained from the Animal Productivity and Health Information Network (APHIN) database. Associations between management practices and ODs, and between ODs and milk-production parameters were studied. Some management practices known to be associated with parasite burdens had expected directions of association with the ODs, giving supporting evidence that the ELISA is a reasonable measure of parasite burden. Most notably, ODs were increased with greater exposure of heifers or milking cows to pasture. ODs were not associated with either annual milk production or seasonal decline in milk production. However, there was a substantial relationship between the herd OD value and the level of milk production during the summer. An increase in the OD from 0.58 to 0.83 (the interquartile range of ODs) was associated with a reduction in production of 1.25kg/cow/day.  相似文献   

Human Dirofilaria repens infection in Hungary: a case in the spermatic cord and a review of the literature     

Pampiglione S  Elek G  Pálfi P  Vetési F  Varga I 《Acta veterinaria Hungarica》1999,47(1):77-83

Orchiectomy was performed in a 37-year-old Hungarian man exhibiting a swelling in his right testicle. Histology revealed a nodule attached to the spermatic cord, consisting of a granulomatous tissue around sections of a nematode. The worm was identified as Dirofilaria repens, an uncommon parasite in Hungary. As the patient had been abroad only in Italy where cases of dirofilariosis in dogs and humans are relatively frequent, it is assumed that the infection might have been acquired in that country 5 years earlier. This is the fifth case, published so far in the world, of such a localization in a human. The human cases of dirofilariosis reported in Hungary are reviewed.  相似文献   

Pharmacokinetics of Amoxicillin Trihydrate in Desert Sheep and Nubian Goats     

Elsheikh HA  Taha AA  Khalafalla AE  Osman IA  Wasfi IA 《Veterinary research communications》1999,23(8):507-514

The pharmacokinetics of amoxicillin were studied in five Desert sheep and five Nubian goats after intravenous (i.v.) or intramuscular (i.m.) administration of a single dose of 10 mg/kg body weight. Following i.v. injection, the plasma concentration-versus-time data were best described by a two-compartment open model. The kinetic variables were similar in both species except for the volume of the central compartment (V_c), which was larger in sheep (p<0.05). Following i.m. injection, except for the longer half-life time of absorption in goats (p<0.05), there were no significant differences in other pharmacokinetic parameters between sheep and goats. The route of amoxicillin administration had no significant effect on the terminal elimination half-life in either species. The bioavailability of the drug (F) after i.m. administration was high (>0.90) in both species. These results indicate that the pharmacokinetics of amoxicillin did not differ between sheep and goats; furthermore, because of the high availability and short half-life of absorption, the i.m. route gives similar results to the i.v. route. Therefore, identical intramuscular and intravenous dose regimens should be applicable to both species.  相似文献   

INHALATION ANAESTHESIA THROUGH THE ABDOMINAL AIR SAC USING A UNIDIRECTIONAL CONTINUOUS FLOW     

I.D. Wijnberg  E. Lagerweij  P. Zwart 《Veterinary anaesthesia and analgesia》1991,18(Z1):249-253

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