MN PATSIKAS     

LG PAPAZOGLOU  GD BRELLOU  PL PAPADOPOULOU  AK DESSIRIS 《Australian veterinary journal》2005,83(1-2):37-37

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Humoral immunity in cats infected with feline immunodeficiency virus or leukaemia virus     

Cull RM  Jones BR  Harding DR  Nulsen MF 《New Zealand veterinary journal》1994,42(4):148-150

The humoral antibody responses of 82 domestic cats to the common commensal bacteria Pasteurella multocida and Staphylococcus aureus were measured by an indirect immunofluorescence assay to give a subjective quantification of specific IgG in serum. There was no significant difference in specific serum IgG levels between sick cats which tested antibody-positive to feline immunodeficiency virus or antigen-positive to feline leukaemia virus and sick, virus-negative cats. This finding suggested that there was no change in immune status, as measured by this method, in both feline leukemia and feline immunodeficiency virus infections, although, based on clinical signs shown by the virus-positive cats, overall immunosuppression was indicated. Feline immunodeficiency virus and feline leukemia virus infection may have an effect on cellular immunity, as is the case with human immunodeficiency virus.  相似文献   

Antimicrobial use through feed, water, and injection in 20 swine farms in Alberta and Saskatchewan          下载免费PDF全文

Leigh B. Rosengren  Cheryl L. Waldner  Richard J. Reid-Smith  John C.S. Harding  Sheryl P. Gow    Wendy L. Wilkins 《Canadian journal of veterinary research》2008,72(2):143-150

Antimicrobial resistance (AMR) is an emerging animal welfare and public health issue linked to antimicrobial use (AMU) in livestock. This study was conducted in 2004 on 20 swine farms in Alberta and Saskatchewan. On-farm records and questionnaires were used to retrospectively describe the antimicrobial exposures of pigs through feed, water, and injection. Antimicrobial use in all production categories was described over 12 months. On-farm records and questionnaires provided sufficient data to describe antimicrobial exposure rates through feed and water. In contrast, on-farm records did not supply sufficient data to describe parenteral antimicrobial exposure rates. Records lacked data on the number of exposures per treatment, therefore parenteral AMU was described as an exposure incidence. Parenteral exposure records were often unavailable for pigs less than 22 kg, in which case questionnaires were used. The incidence of parenteral AMU was significantly higher in herds reporting exposure by questionnaire compared with existing records, suggesting that on-farm records did not reliably describe parenteral AMU. However, because antimicrobial exposures in feed and water were markedly more common than through injection, it was concluded that existing on-farm data would be a valuable resource for investigating AMU and AMR in pigs.  相似文献   

Wheat diseases on the prairies: A Canadian story     

Reem Aboukhaddour  Thomas Fetch  Brent D. McCallum  Michael W. Harding  Brian L. Beres  Robert J. Graf 《Plant pathology》2020,69(3):418-432

Canada is one of the largest wheat producers in the world, and wheat is grown over an area spanning most of the southern latitudes, with the prairie region (provinces of Saskatchewan, Alberta, and Manitoba) being the main producer. Several pathogens and pests attack wheat, but at present fusarium head blight (FHB), stripe rust, and leaf spots are the most damaging diseases to wheat production in Canada. Historically, smuts, stem rust, and leaf rust caused major crop losses in Canada and can still pose serious threat if management practices are relaxed. Cropping practices used by Canadian farmers to grow and harvest wheat over the last century have influenced disease development and pathogen biology, affecting the severity, incidence, and prevalence of crop diseases over time. Changes such as reduced tillage coincide with emergence of residue-borne diseases, such as FHB and leaf spots, while the deployment of resistant cultivars and increased fungicide use has resulted in the reduction of common bunt, stem, and leaf rust. This review will discuss the influence of long-term cropping practices, alone or in combination, on the biology, emergence, and prevalence of wheat diseases in Canada over the last century.  相似文献   

Carcinogen in rock fern (Cheilanthes sieberi) from New Zealand and Australia     

BL SMITH  PP EMBLING  DR LAUREN  MP AGNEW  AD ROSS  PL GREENTREE 《Australian veterinary journal》1989,66(5):154-155

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TRANSMISSIBLE SEROSITIS AND ITS RELATIONSHIP TO SPORADIC BOVINE ENCEPHALOMYELITIS     

W. B. Harding  B.V.Sc. 《Australian veterinary journal》1963,39(9):333-337

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Mercury poisoning in pigs     

R M Loosmore  J D Harding  G Lewis 《The Veterinary record》1967,81(11):268-269

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Experimental poisoning by bracken rhizomes in pigs     

W C Evans  B Widdop  J D Harding 《The Veterinary record》1972,90(17):471-475

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An outbreak of ulcerative dermatitis in pigs     

D Beaton  W A Watson  J D Harding 《The Veterinary record》1974,94(26):611-613

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Poisoning with 3-nitropropionic acid in possums (Trichosurus vulpecula)     

Gregory NG  Orbell GM  Harding DR 《New Zealand veterinary journal》2000,48(3):85-87

AIMS: To evaluate the toxicity, animal behavioural effects and animal welfare implications of 3-nitropropionic acid administration in possums. METHODS: The behavioural effects following 3-nitropropionic acid administration were recorded in 26 possums. RESULTS: The oral LD50 was between 110 and 170 mg/kg. Time to death averaged 9.5+/-1.9 h (mean+/-s.e.m.). Adverse signs from an animal welfare perspective were retching and restless behaviour that occurred in episodes during a period that averaged 1 h 51 min. Retching occurred in possums that were injected intraperitoneally or dosed orally with the 3-nitropropionic acid, suggesting that this effect was not necessarily initiated by gastric irritation. CONCLUSION: The potency of 3-nitropropionic acid as a toxin was low compared to other toxins that are used in possums, but it is relatively quick acting. It may cause some discomfort (retching and restlessness) prior to death.  相似文献