Campylobacter infection in a closed dog breeding colony     

C M Newton  D G Newell  M Wood  M Baskerville 《The Veterinary record》1988,123(6):152-154

Most dogs in a closed breeding unit were shown to be asymptomatic excretors of campylobacter organisms by eight weeks old. Increasing serum antibody levels, which were correlated with the excretion of organisms, were demonstrated in the puppies and serum antibodies were also demonstrated in adult dogs. The significance of these findings with respect to the pathogenicity of campylobacter in dogs and their zoonotic implications are discussed.  相似文献   

Isolation, characterization, and molecular cloning of cryptic plasmids isolated from Edwardsiella ictaluri   总被引：1，自引：0，他引：1  

J C Newton  R C Bird  W T Blevins  G R Wilt  L G Wolfe 《American journal of veterinary research》1988,49(11):1856-1860

Fifty-five isolates of Edwardsiella ictaluri were examined for the presence of plasmid DNA by a rapid alkaline extraction procedure. All 49 isolates from channel catfish and a single isolate from Bengal danio carried 2 plasmids with molecular masses of approximately 3.2 and 3.7 megadaltons (Mdal). Five E ictaluri isolates from other fish contained 1 to 3 plasmids, which had molecular masses ranging from 2.5 to 45 Mdal. The 2 plasmids (3.2 and 3.7 Mdal) from the type strain of E ictaluri (ATCC 33202) were ligated into pUC19 cloning vectors, and restriction endonuclease maps of each insert were prepared.  相似文献   

CONTROL OF CLUB ROOT DISEASE OF CAULIFLOWERS     

John  Colhoun  D. M. Cranston  Peter  Newton 《Plant pathology》1965,14(3):122-125

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Chronic renal failure and urolithiasis in a 2-years-old colt     

JA LAING  AL RAISIS  RJ RAWLINSON  AC SMALL 《Australian veterinary journal》1992,69(8):199-200

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Diarrhoea in Merino ewes during winter: association with trichostrongylid larvae     

JWA LARSEN  N ANDERSON†  AL VIZARD‡  GA ANDERSON‡  H HOSTE§ 《Australian veterinary journal》1994,71(11):365-372

SUMMARY A study on 3 farms, each having a preventive strategy for the control of nematode infections, determined the risk factors associated with diarrhoea among Merino ewes in winter. Comparisons were made among groups of mated and unmated ewes with and without treatment with controlled-release capsules containing albendazole. Diarrhoea was assessed from the accumulations of faeces around the breech (dag score) and related to worm egg counts, total worm counts and histopathological findings. The overall prevalence of severe dag in ewes not treated with a capsule was 26% (221/844). In comparison, only 2.7% of treated ewes had severe dag. The adjusted odds ratio on each farm indicated that untreated ewes were between 12 and 16 times more likely to be affected with severe dag than ewes treated with a capsule. The effect of lactation was significant on only one farm whereas initial body weight had no significant effect. There was no significant association between worm egg counts and the occurrence of severe dag. There were significantly more eosinophils in the small intestine of ewes affected with severe dag compared with unaffected ewes. There were no significant differences in mast cell and globule leucocyte numbers between affected and unaffected ewes. This study provides strong evidence that the main cause of diarrhoea among Merino ewes grazing winter and early spring pastures is the ingestion of trichostrongylid larvae even by sheep that have a well-developed protective immune response to these parasites. New strategies for the control of nematode infections are needed to prevent diarrhoea and dag formation in adult sheep.  相似文献   

NEW HONORARY MEMBERS OF THE AUSTRALIAN VETERINARY ASSOCIATION     

Helen Newton Turner  Trevor Cory Beard  William John Stevenson 《Australian veterinary journal》1980,56(9):451-452

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SIDEROLEUCOCYTES AS A DIAGNOSTIC AID IN EQUINE INFECTIOUS ANAEMIA     

Corinne K.  Granzien B.V.Sc. L. G. Newton  B.V.Sc.† 《Australian veterinary journal》1968,44(9):406-409

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Induced resistance for plant disease control: maximizing the efficacy of resistance elicitors     

Walters D  Walsh D  Newton A  Lyon G 《Phytopathology》2005,95(12):1368-1373

ABSTRACT Plants can be induced to develop enhanced resistance to pathogen infection by treatment with a variety of abiotic and biotic inducers. Biotic inducers include infection by necrotizing pathogens and plant-growth-promoting rhizobacteria, and treatment with nonpathogens or cell wall fragments. Abiotic inducers include chemicals which act at various points in the signaling pathways involved in disease resistance, as well as water stress, heat shock, and pH stress. Resistance induced by these agents (resistance elicitors) is broad spectrum and long lasting, but rarely provides complete control of infection, with many resistance elicitors providing between 20 and 85% disease control. There also are many reports of resistance elicitors providing no significant disease control. In the field, expression of induced resistance is likely to be influenced by the environment, genotype, and crop nutrition. Unfortunately, little information is available on the influence of these factors on expression of induced resistance. In order to maximize the efficacy of resistance elicitors, a greater understanding of these interactions is required. It also will be important to determine how induced resistance can best fit into disease control strategies because they are not, and should not be, deployed simply as "safe fungicides". This, in turn, will require information on the interaction of resistance elicitors with crop management practices such as appropriate-dose fungicide use.  相似文献   

Multifocal cutaneous histiocytic sarcoma in a young dog and review of histiocytic cell immunophenotyping     

Mastrorilli C  Spangler EA  Christopherson PW  Aubry OA  Newton JC  Smith AN  Kennis RA  Weismann JL  Moore PF 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2012,41(3):412-418

A 9‐month‐old male Great Dane had progressive generalized nodular dermatopathy for several months. There were > 100 raised, alopecic, firm, painful nodules throughout the skin. Aspirates from several lesions yielded moderate numbers of irregularly round or polygonal to spindle‐shaped cells with mild to moderate anisocytosis and few inflammatory cells, and the cytologic interpretation was proliferation of mesenchymal or histiocytic cells. On histopathologic examination, nodules were composed of densely packed sheets of round to spindle‐shaped cells with mild anisokaryosis and low mitotic activity. Multifocal histiocytic sarcoma with a spindle‐cell pattern was diagnosed based on morphologic features and intense expression of CD18. Additional immunophenotypic analysis on frozen sections of tissue confirmed the diagnosis of histiocytic sarcoma; expression of CD18, CD45, CD1a, CD11b, and CD11c, limited expression of Thy‐1 (CD90) and CD80, and lack of expression of CD4, CD11d, and CD86 indicated that the cells were likely interstitial dendritic cells; a review of reactive and neoplastic dendritic cells is provided. Based on staging, internal organs were not affected. Sequential treatment with lomustine and doxorubicin failed to prevent progression of the cutaneous lesions, and the dog died 3 months after initial diagnosis. At necropsy, a focus of neoplastic cells was present in one lymph node, but except for skin other organs were not involved. The clinical presentation of histiocytic sarcoma may be unusual, and neoplastic cells may lack overt features of malignancy on cytologic and histopathologic examination. In some instances, immunophenotyping is required to differentiate histiocytic sarcoma from other histiocytic disorders.  相似文献   

Third International Havemeyer Workshop on Equine Herpesvirus type 1     

JH Kydd  J Slater  N Osterrieder  DP Lunn  DF Antczak  W Azab  U Balasuriya  C Barnett  M Brosnahan  C Cook  A Damiani  D Elton  A Frampton  J Gilkerson  L Goehring  D Horohov  L Maxwell  J Minke  P Morley  H Nauwynck  R Newton  G Perkins  N Pusterla  G Soboll-Hussey  J Traub-Dargatz  H Townsend  GR Van de Walle  B Wagner 《Equine veterinary journal》2012,44(5):513-517

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