increased sensitivity to touch, sounds or sight stimuli Īny of the following deviations from normal behaviour or appearance during the ante-mortem inspection may indicate BSE and should trigger an in-depth evaluation by a CFIA veterinarian:.hesitation at doors, gates or barriers.poor body condition and/or showing a decrease in milk production.lack of co-ordination (ataxia) or difficulty in turning or rising from a lying position.abnormal head carriage and/or abnormal posture.nervous, aggressive or apprehensive behaviour.
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In accordance with the Animal Health Bovine Spongiform Encephalopathy Manual of Procedures, a BSE suspect case is defined as a bovine of 24 months of age or older exhibiting at least three (3) of the following signs upon clinical examination: 5.4.1.2 Sample selection 5.4.1.1.1 BSE suspect at the abattoir Animals displaying behavioural or clinical signs consistent with BSE are required to be reported promptly to the local Animal Health District Veterinarian, who will determine the follow-up actions. Since 1990, BSE has been a federally reportable disease in Canada under subsection 5(1) and subsection 5(2) of the Health of Animals Act. Refer to Chapter 12 of this manual for additional details. Therefore, inspectors should evaluate whether the animal may have been unfit for transport, in contravention of Part XII of the Health of Animals Regulations. Note: Animals at increased risk of BSE are also at higher risk of being compromised. The probability of detecting BSE in targeted high risk bovine populations has been documented to be about 20 times greater than in apparently healthy animals. Our objective is to maintain this status and eventually achieve OIE negligible BSE risk status.Ĭanada conducts surveillance testing for BSE in targeted high risk bovine categories as recommended by the OIE in its Terrestrial Animal Health Code. As of May 2007, the OIE categorized Canada as a controlled BSE risk country. These cases have been managed in accordance with the World Organisation for Animal Health (OIE) guidelines. BSE occurs as a result of dietary exposure to feedstuffs containing meat and bone meal contaminated with the BSE-agent, BSE can only be diagnosed through the detection of the abnormal prion protein in the brain there is no test to diagnose BSE in live animals.Ĭanada has only had a few cases of BSE.
There is no evidence of horizontal transmission of BSE between cattle, or of vCJD in humans. The disease agent is believed to be able to infect humans, causing New Variant Creutzfeld-Jakob Disease (vCJD). BSE is a disease that is a major concern to the public and animal health authorities worldwide.
5.4.1 Bovine Spongiform Encephalopathy (BSE) 5.4.1.1 Introductionīovine Spongiform Encephalopathy (BSE) is a progressive, invariably fatal, degenerative neurological disease caused by a misfolded protein (prion), which is extremely resistant to heat, enzymes, and a large range of chemical disinfectants. Specific procedures are applicable if rabies is suspected and sampling is required. Note: All suspect animals displaying clinical signs of neurodegenerative disorders should also be evaluated for rabies virus. The diseases are characterized by a long incubation period and are caused by a misfolded protein called a prion. The family includes bovine spongiform encephalopathy (BSE) in cattle, Creutzfeldt-Jakob disease in humans, chronic wasting disease (CWD) in deer and elk and scrapie in sheep and goats. The transmissible spongiform encephalopathies (TSEs) are a family of slowly progressive, neurodegenerative disorders affecting humans and animals.
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