Canadian Quality Milk On-Farm Food Safety Program - Centre ...

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Canadian Quality Milk Identify cattle that require special identification (e.g. fresh, dry, abnormal milk). Detect clinical mastitis (red, hard, swollen or hot quarters). Clean very dirty teats before forestripping. Forestrip before cleaning teats (or immediately after pre-dipping) allows for better: • Mastitis detection, especially with a black bottom strip cup. (Do not forget to discard abnormal milk.). • Teat stimulation. Ensure the maximum benefit of naturally produced oxytocin and to obtain a rapid and complete milk out, units are attached 45 to 90 seconds after the beginning of teat stimulation, always using the same lag-time. Minimize air admission into the teat cups during attachment and removal. Adjust units to reduce the incidence of liner slips and favour an equal and complete milk out. Avoid machine stripping. Shut-off vacuum with or without automation, as soon as there is minimal milk flow, and remove the unit smoothly. Spray or, preferably, dip teats with a disinfectant immediately after unit removal, making sure the whole teat is covered. 5.2.2 Milking Animals with Abnormal Milk Milk that is unfit for human consumption must be diverted from the bulk tank. To prevent abnormal milk from entering the bulk tank, establish your SOP in the workbook to describe how these animals must be milked. The SOP must contain enough information to ensure that a relief milker can identify and milk animals with abnormal milk and keep the milk out of the bulk tank. You should consider the following Best Management Practices when you develop your own SOP, but you must include the Best Management Practices that are shaded grey: Discard the milk from those quarters that have abnormal milk (e.g. mastitic milk, bloody milk) and for the first 3 days in milk (colostrum). Never use quarter milkers on a treated animal. Antibiotics can be released into the milk regardless of the site of entry. For example, treatment into one quarter will result in residues in the other non-treated quarters. Check both permanent and temporary treatment records to determine which animals’ milk is unfit for consumption. Use a blackboard or white board that is visible in the parlour or barn and is close to where milking takes place to remind the operator of a treated animal. Mark animals with abnormal milk. Use a distinctly different colour of leg band to distinguish special animals. For cattle that have milk unfit for human consumption, mark red crosses on the animals’ rumps as an additional precaution. See Chapter 4 for more examples of marking treated cattle. Segregate animals with abnormal milk. The risk of shipping abnormal milk is reduced if animals with abnormal milk are kept separately from the herd. If these June 2010 5—7
Canadian Quality Milk animals are milked last into the milkline, make sure the milk delivery line or transfer line is taken off the bulk tank before milking them. Establish a routine for handling abnormal milk from animals that cannot be segregated. Clean, check and maintain an extra milking unit used for milking animals with abnormal milk. Maintain these units in the same manner as the other units. If the animal has not been treated, use a quarter milker to discard the milk from a single infected quarter. This allows you to improve milk quality without having to discard too much milk. Clearly identify animals infected with contagious bacteria (e.g., Strep. agalactiae and Staph. aureus) and milk them separately to prevent the spread of contagious diseases to other animals. If possible, designate one milking unit for milking infected animals or milk them last. After milking an animal with contagious bacteria, disinfect the unit by: • Automatic back-flushing. • Manually disinfecting each unit. The recommended method for manual disinfecting is: − First, rinse both the exterior and interior of the unit. − Next, dip the claw in a sanitising solution containing 25-50 ppm of iodine ⎯ ensure solution stays in contact with interior of claw for 30 seconds. − Finally, rinse the claw and let it drain. Whenever possible, milk cattle with a doubtful status, such as purchased replacement and high SCC cows, after the healthy animals and before the infected ones. This will reduce the risk of spreading a contagious infection. Whenever possible, milk early lactation cattle before late lactation cattle, as they are less at risk of being infected by a contagious microorganism. 5.2.3 Milking Treated Animals Milking is a Critical Control Point on a dairy farm because it is the last step in the process of producing milk where you can prevent treated milk from entering the bulk tank. When milking, you must ensure that milk from treated animals that have not met appropriate withdrawal times is not shipped for human consumption. Never use quarter milkers on a treated animal. Antibiotics can be released into the milk regardless of the site of entry. Critical Control Point: Milking treated animals Hazard: Chemical: pharmaceuticals (e.g. antibiotic residues) Critical Limit: Negative by a recognized test by the provincial regulatory authority. 5—8 June 2010
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Canadian Quality Milk On-Farm Food
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Canadian Quality Milk Table of Cont
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Canadian Quality Milk PRESIDENT’S
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Canadian Quality Milk ABOUT THIS BO
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Canadian Quality Milk Hazards are r
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Canadian Quality Milk program and e
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Canadian Quality Milk 1.0 DAIRY FAC
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Canadian Quality Milk Introduction
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Canadian Quality Milk Store pestic
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Canadian Quality Milk • In tie-st
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Canadian Quality Milk - Allow anima
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Canadian Quality Milk • Designing
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Canadian Quality Milk WHAT TO DO El
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Canadian Quality Milk HAZARD SOURCE
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Canadian Quality Milk Introduction
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Page 129 and 130: Canadian Quality Milk 11.0 MILK AND
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Canadian Quality Milk CAUSES SOLUTI
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Canadian Quality Milk E) MANUAL WAS
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Canadian Quality Milk FILM OR DEPOS
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Canadian Quality Milk 12.0 LIST OF
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