Mycoplasma bovis and otitis in dairy calves in the United Kingdom     

Foster AP  Naylor RD  Howie NM  Nicholas RA  Ayling RD 《Veterinary journal (London, England : 1997)》2009,179(3):455-457

Signs of severe otitis media in 20% of dairy calves on one farm were associated with Mycoplasma bovis infection, based on isolation from the external ear canal and nares. Affected calves seroconverted to M. bovis and no other significant bacteria were isolated. Infection was considered likely to have originated from cows in the milking herd based on evidence of seroconversion and detection of infection in a milk sample. M. bovis infection should be considered when investigating otitis problems in calves.  相似文献   

Improvement of Fertility in Artificially Inseminated Ewes Following Vaginal Treatment with Misoprostol Plus Terbutaline Sulphate     

AEM Horta  JP Barbas  CC Marques  MC Baptista  MI Vasques  RM Pereira  RD Mascarenhas  S Cavaco‐Gonçalves 《Reproduction in domestic animals》2010,45(6):e412-e416

The effect of vaginal administration of misoprostol plus terbutaline sulphate 6 h prior to artificial insemination (AI) upon the site of AI (vaginal or cervical) and fertility was studied using a total of 87 estrous synchronized Serra da Estrela ewes (control n = 42 and treated n = 45). Artificial insemination was performed using refrigerated semen at 54–55 h after sponge removal. Lambing rate (fertility) and prolificacy were compared between control and treated ewes. The effect of the site of semen deposition on fertility was also evaluated. Prolificacy rate was not different between control (1.5) and treated (1.59) ewes. The proportion of cervical AI achieved in control (45.2%) and treated (37.8%) ewes was not significantly different. Overall, fertility was significantly lower in control than in treated ewes (42.9% vs 64.4%; p < 0.04). Fertility following vaginal AI was significantly lower for control for than treated ewes (30.4% vs 60.7%; p < 0.03) but the difference was smaller and not significant for cervical AI (control 57.9% vs 70.6%). It was concluded that vaginal administration of misoprostol plus terbutaline sulphate 6 h prior to artificial insemination did not affect the proportion of cervical inseminations but significantly improved the fertility of treated ewes. Although needing confirmation, it was hypothesized that drugs might have induced local secretory modifications leading to an increase of cervical ability to retain more viable spermatozoa for fertilization.  相似文献   

Gametic disequilibria between virulence genes in barley powdery mildew populations in relation to selection and recombination. I. Models     

HANNE øSTERGÅRD  MOGENS S. HOVMøLLER 《Plant pathology》1991,40(2):166-177

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Animal medical genetics: a perspective on the epidemiology and control of inherited disorders     

RD Jolly  HT Blair 《New Zealand veterinary journal》2016,64(3):135-144

This perspective considers genetic disorders of domestic animal populations, in particular their epidemiology and control. Inherited disorders of animals share the same basic molecular biology as those of human beings, but they differ in their epidemiology due largely to the breed structure of the various species, human control of breeding and a greater influence of the founder effect, particularly due to extensive use of a limited number of sires, and inbreeding. Control of genetic disorders in animals is also more practical through extensive screening for disease, or heterozygous animals within defined breed populations, followed by exclusion of affected or carrier animals from breeding. This is assisted by the fact that, within a breed, many inherited monogenic disorders are associated with a single mutation. However some of the more important disorders may be inherited in a non-Mendelian manner, being influenced by multiple genes as well as environmental factors. These aspects are discussed and contrasted with similar aspects in human medical genetics.  相似文献   

Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1984,57(5):98-102

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1988,61(6):118-120

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Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1986,59(7):137-139

Ohne ZusammenfassungPflanzenschutzorganisation für Europa und die Mittelmeerländer  相似文献   

Rundschau     

RD i. R. Dr. Edmund Leib 《Journal of pest science》1983,56(7):140-143

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The detection of Mycoplasma (formerly Eperythrozoon) wenyonii by 16S rDNA PCR and denaturing gradient gel electrophoresis     

McAuliffe L  Lawes J  Bell S  Barlow A  Ayling R  Nicholas R 《Veterinary microbiology》2006,117(2-4):292-296

Although the role of Mycoplasma wenyonii in disease is still subject to some debate, infections have been reported to result in parasitaemia, anaemia, scrotal and hind limb oedema, tachycardia, pyrexia, infertility, swollen teats, prefemoral lymphadenopathy and decreased milk production. Previously, diagnosis of M. wenyonii has been based on blood smears but is not specific for M. wenyonii and can be difficult to interpret. We have previously described the use of PCR and denaturing gradient gel electrophoresis (DGGE) for the detection and differentiation of Mycoplasma species. DGGE enables the rapid and specific identification of Mycoplasma species and is ideally suited to detecting both mixed infections and new and unusual species. In this study, we have used DGGE with universal primers to detect M. wenyonii DNA from blood samples. DGGE can be used on blood samples as a rapid and specific test for M. wenyonii and can also be used as a screening test for other blood borne pathogens.  相似文献   

Lythrum hyssopifolia (lesser loosestrife) poisoning of sheep in Victoria     

MJ Lancaster  JS Nimmo  C Lenghaus  IJ Gill  RD Crawford  RT Badman  JL Samuel  CJ Werner  C Button  N Kvalheim 《Australian veterinary journal》2009,87(12):476-479

Objective To document an ovine disease attributed to the consumption of Lythrum hyssopifolia (lesser loosestrife). Procedures Historical and histological review of field and experimental cases. Results 1–20% mortality occurred in sheep flocks grazing paddocks where L. hyssopifolia was the predominant green vegetation. Well‐documented disease outbreaks occurred in summer on nine farms across Victoria between 1974 and 2002. Liver damage occurred in all nine outbreaks, with kidney damage in at least eight. Hepatocyte necrosis was usually zonal to midzonal (zone 2) in the liver samples from four farms and periacinar (zone 3) in those from three farms, but some livers showed only single‐cell necrosis. Multinucleate hepatocytes near necrotic areas were a feature in six cases. Proximal tubular epithelium appeared to be the primary renal target and brown granules were often present in renal tubules. Biochemical and histological evidence of liver and kidney damage was obtained from two sheep experimentally pen‐fed harvested L. hyssopifolia. Conclusion Chemicals in L. hyssopifolia are toxic to ovine hepatocytes and renal tubular epithelial cells.  相似文献