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Dairy: Health, Welfare and Disease (Common Diseases Affecting Diary Cattle…
Dairy: Health, Welfare and Disease
Common Diseases Affecting Diary Cattle:
Mastitis
Lameness
Metabolic/nutritional diseases
Infectious diseases
Reproductive diseases
Key Animal Welfare Issues
Calving induction (<10% should disappear)
Tail docking (<9% should disappear)
Lameness/heat stress
Calf management
Colostrum (must be within 5 hours)
Transport (must be 5 days old)
Mastitis
Factors influencing Mastitis
Stage of lactation
Environment
Milking routine (hygiene etc)
Contagious pathogen
Staphylococcus aureus (difficult to eradicate)
Streptococcus agalactiae (sensitive to treatment)
(Mycoplasma spp.) (highly contagious)
Pasteurisation
At least 72˚ for 15 seconds (HTSP)
At least 183˚ for 2 seconds (UHT)
Psychrotrophic Bacteria --> reduces shelf life
Neonatal Calf Mortality
Within first month of life
Neonatal enteritis (>50% mortality)
E.coli and salmonella
Dehydration
Bovine respiratory disease (<50% mortality)