Prevalence of Toxoplasma gondii infection in raccoons.     

J P Dubey  A N Hamir  C A Hanlon  C E Rupprecht 《Journal of the American Veterinary Medical Association》1992,200(4):534-536

Serum samples from 427 raccoons (93 from Pennsylvania, 45 from New Jersey, 72 from South Carolina, 68 from Virginia, 30 from Iowa, and 119 from Ohio) were evaluated for Toxoplasma gondii antibodies in dilutions of 1:25, 1:50, and 1:500. The distribution of T gondii antibody titers was less than 1:25 for 212 raccoons (49.6%), 1:25 for 34 raccoons (7.9%), 1:50 for 117 raccoons (27.4%), and greater than or equal to 1:500 for 64 raccoons (14.9%). Tissue cysts were seen in the liver, and tachyzoites were in the brain of a raccoon with abnormal neurologic signs and concurrent infection with canine distemper virus. Organisms in the liver were stained with anti-T gondii serum, and the raccoon had a T gondii titer of 1:160 in the agglutination test.  相似文献   

Comparative susceptibility of caponized and uncaponized tom turkeys to Pasteurella multocida.     

R C Friedlander  L D Olson  E L McCune 《Avian diseases》1992,36(1):97-100

When susceptibility to virulent Pasteurella multocida was compared, there was no significant (P greater than 0.05) difference between caponized and uncaponized tom turkeys. Neither was there any significant (P greater than 0.05) difference between the surviving caponized and uncaponized toms in the development of serum anti-P. multocida antibody. However, at 28 weeks of age, the average live body weight of the caponized toms was significantly (P less than 0.05) lower than that of the uncaponized toms. Turkeys were caponized when 9 weeks old, and different groups were exposed to P. multocida when 13, 18, 23, and 28 weeks old.  相似文献   

Comparison of slot blot nucleic acid hybridization, immunofluorescence, and virus isolation techniques to detect bluetongue virus in blood mononuclear cells from cattle with experimentally induced infection.   总被引：1，自引：0，他引：1  

A de la Concha-Bermejillo  C E Schore  C A Dangler  C C de Mattos  C A de Mattos  B I Osburn 《American journal of veterinary research》1992,53(12):2245-2250

A slot blot hybridization technique was applied for detection of bluetongue virus (BTV) in blood mononuclear cells (BMNC) obtained from cattle with experimentally induced infection. This technique lacked sensitivity to detect the viral nucleic acid directly in clinical specimens. When aliquots of mononuclear cells from these cattle were cultivated in vitro for 10 days to amplify virus titer, only 33.3% of the samples collected during viremia gave a positive signal in the slot blot hybridization format. By contrast, results for 34.3% of noncultured and 63.3% of cultured mononuclear cell samples collected during viremia were positive by immunofluorescence. The average number of infected cells, as detected by immunofluorescence in the noncultured mononuclear cell samples, was 1 to 5/300,000, and was usually > 10/300,000 in the cultured cell samples. Virus was isolated from all postinoculation blood samples obtained from 4 heifers that were seronegative at the time of inoculation, but was not isolated from any of the preinoculation samples, or from any of the postinoculation samples obtained from 2 heifers that were seropositive at the time of inoculation. When virus isolation was attempted from separated mononuclear cells in 2 heifers, 43.7% of the noncultured and 87.5% of the cultured samples had positive results.  相似文献   

Laryngeal paralysis in immature and mature dogs as one sign of a more diffuse polyneuropathy     

K G Braund  H S Steinberg  A Shores  J E Steiss  J R Mehta  M Toivio-Kinnucan  K A Amling 《Journal of the American Veterinary Medical Association》1989,194(12):1735-1740

Six dogs with laryngeal paralysis had clinical, electrophysiologic, and pathologic evidence of a more generalized polyneuropathy. Three of the dogs were young Dalmatians, one was a young Bouvier des Flandres, and two were older, large-breed dogs. The results of this study suggest that laryngeal paralysis in dogs may frequently be one clinical sign of an underlying, more generalized polyneuropathy. Two forms of this generalized polyneuropathy may exist: an early form, as seen in young dogs with congenital or hereditary disease, and a delayed-onset form that is usually found in older dogs with so-called idiopathic laryngeal paralysis, some of which may have hypothyroidism.  相似文献   

THE APPEARANCE OF THE CANINE PYLORIC REGION IN RIGHT VERSUS LEFT LATERAL RECUMBENT RADIOGRAPHS     

Nancy E.  Love  DVM 《Veterinary radiology & ultrasound》1993,34(3):169-170

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Effect of energy source and xylanase addition on energy metabolism, performance, chemical body composition and total body electrical conductivity (TOBEC) of broilers   总被引：3，自引：0，他引：3  

S. Dänicke  I. Halle  E. Strobel  E. Franke  & H. Jeroch 《Journal of animal physiology and animal nutrition》2001,85(9-10):301-313

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COLLAGENASE CHEMONUCLEOLYSIS—A LONG TERM RADIOGRAPHIC STUDY IN NORMAL DOGS     

Matthew A.O.  Atilola  DVM  PhD  Joanne R.  Cockshutt  DVM  MS  Ron  Mclaughlin  DVM  DVSc  Susan M.  Cochrane  DVM  DVSc  Paul W.  Pennock  DVM  MS 《Veterinary radiology & ultrasound》1993,34(5):321-324

Five clinically normal five year old dogs were used in this study. From a randomised table inter ver tebral discs were each injected with either collagenase or calcium chloride diluent. The surgically exposed cervical discs were injected with 50 units whereas thoracic and lumbar discs were injected under fluoroscopic guidance with 100 units of the enzyme. Postinjection radiographs revealed significant (p ≤ .05) disc space narrowing in enzyme injected discs. The cervical discs had the highest frequency of radiographic narrowing (87%) followed by the thoracic (70%) and lumbar (53%) discs. Spondylosis deformans developed at the sites of cervical enzyme injections. None of the dogs had neurologic abnormalities one year postinjection.  相似文献   

Mangroves as indicators of coastal change   总被引：2，自引：0，他引：2  

F. Blasco  P. Saenger  E. Janodet 《CATENA》1996,27(3-4)

In view of the unique biological characteristics of mangroves, it is interesting to assess the extent to which these ecosystems can be used as indicators of coastal change or sea-level rise. From recent studies of mangrove mortality at several locations (including Guiana, Gambia, Côte d'Ivoire, Kenya, India and Bangladesh), it appears that these coastal ecosystems are so specialized that any minor variation in their hydrological or tidal regimes causes noticeable mortality. Each species of mangrove (but particularly those belonging to the genera Rhizophora, Bruguiera, Sonneratia, Heritiera and Nypa) occurs in ecological conditions that approach its limit of tolerance with regard to salinity of the water and soil, as well as the inundation regime. If the duration of daily immersion were to be modified by tectonic, sedimentological or hydrological events, the species either readjusts to the new conditions or succumbs to unsuitable conditions. Consequently, the use of remote sensing data for mangrove ecosystems offers excellent potential as a tool for monitoring coastal change.  相似文献   

The effect of exploratory laparotomy on the serum and peritoneal haptoglobin concentrations of the pony.   总被引：1，自引：0，他引：1       下载免费PDF全文

T E Eurell  D A Wilson    G J Baker 《Canadian journal of veterinary research》1993,57(1):42-44

Serum haptoglobin concentration was used as an indicator of the acute phase response in ponies undergoing exploratory laparotomy. Preoperative, 1 h intraoperative, 3 h, 6 h, 12 h and 24 h postoperative blood samples and 48 h postoperative peritoneal fluid samples were obtained for haptoglobin analysis. A spectrophotometric assay based on cyanmethemoglobin binding capacity (CyanBC) was used to determine haptoglobin concentrations. The preoperative reference range for serum haptoglobin concentrations in these ponies was 25-60 mg CyanBC/dL. Intraoperative and 3 h postoperative blood samples had decreased haptoglobin concentrations when compared to preoperative values. Serum haptoglobin concentrations began to rise by the 6 h postoperative sample and were generally elevated above preoperative values by the 24 h postoperative sample. Two of the ten ponies had mild signs of postoperative colic which were associated with twofold elevations in serum haptoglobin concentrations and fivefold elevations in peritoneal fluid haptoglobin concentrations.  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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