Failure of Routine Coagulation Screening Tests to Detect Heterozygous State of Bovine Factor XI Deficiency     

Gentry PA  Ross ML 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》1986,15(3):12-16

In a survey of coagulation, biochemical and hematological parameters in cattle homozygous (deficient), heterozygous (carrier) and non-affected (normal) for Factor XI deficiency, only the Activated Partial Thromboplastin Time (APTT) results correlated with plasma Factor XI activity levels. The APTT results and the thrombokinetics for the deficient animals were markedly different from the results of either the carrier or normal animals. However, the APTT assay was shown not to be sufficiently sensitive to differentiate between the normal and carrier state for the coagulation disorder. Not only was there no statistical difference between the mean APTT results for the normal and carrier animals, but the thrombokinetics for fibrin clot formation for the two groups were also similar.  相似文献   

Serotyping of Haemophilus pleuropneumoniae by rapid slide agglutination and indirect fluorescent antibody tests in swine   总被引：14，自引：0，他引：14  

V J Rapp  R F Ross  B Z Erickson 《American journal of veterinary research》1985,46(1):185-192

One hundred and forty-one isolates of Haemophilus pleuropneumoniae from Iowa and Illinois swine were characterized morphologically and biochemically and serotyped by rapid slide agglutination (RSA) and indirect fluorescent antibody (IFA) tests. Hyperimmune antisera were produced in rabbits using inactivated whole-cell suspensions of the reference strains for H pleuropneumoniae serotypes 1 to 7 and strain 202, representing the taxon "minor group." Cross testing of the reference strains and reference antisera indicated the antisera to be essentially serotype-specific, although reactivity of some antisera with heterologous strains was observed. Cultures of the 141 isolates formed adherent or smooth colonies or mixtures of these colony forms. Adherent and smooth colony types were found in all serotypes identified. Microscopic and biochemical characteristics of all isolates were typical of those previously described for H pleuropneumoniae. The overall incidence of H pleuropneumoniae serotypes was serotype 5, 55.3%; serotype 1, 34.0%; serotype 7, 7.8%; and nontypeable, 2.8%. Comparing the 2 test procedures, 87.2% of the isolates could be typed by RSA, and 66.0% could be typed by IFA. Cross-reactions between serotype 4 antisera and serotype 5 and 7 isolates were common with the IFA test. The reactions with serotype 7, but not serotype 5, were eliminated by cross adsorption of serotype 4 antisera. There was good correlation between the 2 test procedures, but RSA was judged to be more specific and sensitive than IFA.  相似文献   

Immunogenicity of Outer Membrane Components of Haemophilus (Actinobacillus) pleuropneumoniae   总被引：3，自引：0，他引：3       下载免费PDF全文

Rapp VJ  Ross RF 《The Canadian veterinary journal. La revue veterinaire canadienne》1988,29(7):585-587

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Non-specific seroreactions against Brucella abortus in ruminants in New Zealand and the presence of Yersinia enterocolitica 0:9     

Hilbink F  Fenwick SG  Thompson EJ  Kittelberger R  Penrose M  Ross GP 《New Zealand veterinary journal》1995,43(5):175-178

The level of non-specific reactions found in the brucellosis serology of ruminants in New Zealand was very low until July 1992. This changed when, in an export consignment of 1071 deer, 35% reacted in the Brucella abortus tube agglutination test with titres varying from 50 to 200 IU. The reactors were also positive in the Rose-Bengal agglutination test and most of them reacted in the complement fixation test with titres varying from 10 to 80 IU. Yersinia enterocolitica 0:9 was later isolated from one deer of this consignment. It was the first isolate of this serotype recovered in New Zealand from an animal. Shortly after, false reactors occurred more frequently than before in sera from Brucella abortus accredited free cattle herds. As the involvement of Yersinia enterocolitica 0:9 was suspected in these cases, faecal samples from reactors and in-contact animals were cultured for this organism. Yersinia enterocolitica 0:9 was isolated from nine of 19 herds showing one or more false Brucella abortus seroreactions. Prior to 1990, Yersinia enterocolitica serotype 0:9 had not been isolated in New Zealand, despite the recovery of a number of other bio- or serotypes of the organism from humans and animals. From 1990 onward, serotype 0:9 began to be isolated from human faecal samples with increasing frequency. Since the first isolations from deer and cattle in 1992, it has now also been recovered from a cat and an alpaca and from cattle without any association with false positive Brucella abortus reactions. All serotype 0:9 isolates were of biotype 2.  相似文献   

An Extraodinary Fleece: A Genetic Conundrum     

I. Clunibes  Ross D.V.Sc. 《Australian veterinary journal》1933,9(1):32-34

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Live Adults of Trichinella Spiralis     

Winifred M. Ross 《Canadian journal of veterinary research》1948,12(6):152-154

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Lymphoid tissues of the small intestine of swine from birth to one month of age.     

R M Chu  R D Glock  R F Ross  D F Cox 《American journal of veterinary research》1979,40(12):1713-1719

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Gut-associated lymphoid tissues of young swine with emphasis on dome epithelium of aggregated lymph nodules (Peyer's patches) of the small intestine.     

R M Chu  R D Glock  R F Ross 《American journal of veterinary research》1979,40(12):1720-1728

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Intestinal polyps in a lamb.     

A D Ross  W A Day 《New Zealand veterinary journal》1979,27(8):172-173

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Pharmacokinetics of oxytetracycline in loggerhead sea turtles (Caretta caretta) after single intravenous and intramuscular injections.     

Craig A Harms  Mark G Papich  M Andrew Stamper  Patricia M Ross  Mauricio X Rodriguez  Aleta A Hohn 《Journal of zoo and wildlife medicine》2004,35(4):477-488

The pharmacokinetics of oxytetracycline in 2-yr-old loggerhead sea turtles (Caretta caretta) after single i.v. and i.m. injections were studied for biologic marking and therapeutic applications. Twenty juvenile turtles were divided into two treatment groups. Ten animals received 25 mg/kg of oxytetracycline i.v. and 10 received the same dosage i.m. Plasma oxytetracycline concentrations were analyzed by reverse-phase high-performance liquid chromatography. Data from the i.v. route best fit a three-compartment model, whereas noncompartmental analysis was used to compare data from both the i.v. and i.m routes. For the i.v. route, means for maximum plasma concentration, terminal phase half-life, systemic clearance, and apparent volume of distribution at steady state were 6.6 microg/ml, 66.1 hr, 290.7 ml/hr/kg, and 18.4 L, respectively. For the i.m. route, means for systemic availability, maximum plasma concentration, and elimination half-life were 91.8%, 1.6 microg/ml, and 61.9 hr, respectively. The remarkably high apparent volume of distribution may possibly be associated with a deep compartment of drug disposition such as bone deposition associated with the large skeletal mass of turtles and the fact that these were well-nourished, growing juveniles. Although maximum plasma concentration by i.m. administration was lower than for the i.v. route, the long elimination time indicates that an infrequent dosing interval may be effective for sensitive bacteria.  相似文献