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15 Cards in this Set
- Front
- Back
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what are the 3 clinical signs of TB?
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Clinical signs
•chronic cough •progressive loss of condition •most reactors are asymptomatic |
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How do you test for tb?
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Intradermal tuberculin tests
•caudal fold (Australia, USA , South Africa) •comparative cervical (UK) -as a 2ndline test to differentiate from avian and atypical mycobacteria elsewhere Blood serum test •the interferon gamma assay (CSIRO) •test used internationally |
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Why is BRD important?
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•most significant disease in feedlots in Australia
•between 50% and 90% of illness and death in feedlot •economic loss through -loss off production -wasted feed -treatment -labour -space -stock loss -decreased FCE |
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Name 4 viral causes of BRD?
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•bovine herpesvirus type-1 (BHV1) causing infectious bovine rhinotracheitis (IBR)
•pestivirus/ bovine viral diarrhoea virus •bovine respiratory syncytial virus (BRSV) •parainfluenza Type-3 virus (PI3) |
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What are the bacterial causes of BRD?
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Bacterial
•Mannheimia haemolytica(formerly Pasteurella haemolytica) •Pasteurella multocida •Histophilus somni(formerly Haemophilus somnus) Other •Mycoplasma bovis |
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Give clinical signs of BRD. 10
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Clinical signs
•depression and loss of interest in surroundings •pyrexia •lethargy and unwillingness to move •extended head. •droopy ears •conjunctivitis •mucopurulent nasal discharge •coughing •rapid shallow breathing •reduced weight gain |
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what is the primary method of BRD?
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Primary method of BRD control
•BVDV –Pestigard •Herpes Virus –Rhinoguard •Mannheimia haemolytica –Bovilis MH |
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What is shipping fever?
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Shipping fever
•Pasteurella multocida •Mannheimia (Pasteurella) haemolytica •secondary to viral infections •feedlots •transport •shed reared calves (enzootic pneumonia) |
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Pasteurellosis: what are the predisposing factors?
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Predisposing factors
•viral infection •transport •poor nutrition •cold, wet and windy weather •high levels of ammonia in the environment •dusty environments •mixing of groups of cattle •poor ventilation •overstocking |
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How do you treat BRD?
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Treatment –BRD
•must be early have any chance of success •remove affected animals •use broad-spectrum bacteriostatic ab’s -oxytetracycline -Engemycin -ceftiofur-Excenel -tilmicosin-Micotil -florfenicol-Nuflor -tulathromycin-Draxxin •use NSAIDS -flunixil-carprofen -tolfenamicacid-meloxicam -ketoprofen |
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What is the cause of lung abcesses?
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•Actinobacillus pyogenes
•secondary to aspiration •can be primary •chronic weight loss •treatment unsuccessful |
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Calf diphtheria –oral necrobacillosis: What is the cause and clinical signs?
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•Fusobacterium necrophorum
•calves 2-3months •weaners from 6 -24 months •acute onset •may die within 2 -5 days •open mouth breathing •moist painful cough •foetid odour of the breath •respiratory specific antibiotics •tracheotomy in severe cases |
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What is the cause , clinical signs and treatment of lung worm?
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Lungworm
•Dictyocaulisvivipara •4-6 month calves on pasture •secondary to other insults i.e. malnutrition •rare in WA common in Victoria •diarrhoea •dyspnoea and mucous discharge •moist cough •rapid weight loss clinical signs •larvae in mucous and faeces Treatment •Macrocycliclactones |
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Describe ergotism.
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Ergotism
Hyperthermia syndrome •cattle eat contaminated feed •Lolium rigidum(Rye grass) infected with Clavicepspurpurea •looks like mouse poo |
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What are the clinical signs of ergotism ?
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causes peripheral vasodilation
Clinical signs •very high morbidity •hyperthermia –T > 41ºC •laminitis •clear nasal discharge •panting •necrosis of extremities Treatment •remove contaminated feed •NSAIDS |
