Economic impact of mastitis
<div>Cost due to <b>milk yield reduction</b>:</div><div>$6703 per 100 cows per year for clinical mastitis; $24,110 for sub-clinical mastitis</div>
<div>Median cost for treating a mild to moderate clinical mastitis case: $21; for a severe case: $46.</div><div>Total <b>drug expenditure</b> to treat a clinical mastitis case: $349.</div>
<div>Median cost of <b>discarded milk</b> due to both treated and untreated clinical mastitis: $1445 per 100 cows per year.</div><div>Median cost of discarded milk for one clinical mastitis case: $79.</div><div>Median costs of discarded milk for high somatic cell count cows: $87 per 100 cows per year</div>
<div>Median costs associated with <b>culling and mortality</b> of heifers and mature cows: $9037 per 100 cows per year.</div>
<div>Median veterinary cost for clinical mastitis cases: $0 per 100 cows per year (range: 0-3396).</div><div>Median costs for veterinary services for udder health monitoring or investigation: $0 per 100 cows per year (range: 0-9375).</div>
<div>Median expenditures for <b>extra labour </b>due to clinical mastitis: $657 per 100 cows per year ($34 per case).</div>
<div>Median expenditures for <b>extra labour </b>due to clinical mastitis: $657 per 100 cows per year ($34 per case).</div>
<div>Median expenditures for <b>diagnosis</b> of clinical mastitis: $59 per 100 cows per year.</div><div>Median costs for sub-clinical mastitis: $0 per 100 cows per year (range: 0-7500).</div>
<div><b>Material and investment</b></div><div>The 3 most expensive preventive measures are pre- and post-milking teat disinfection and dry cow therapy.</div>
<div>Western provinces: $142,915,189</div><div>Clinical mastitis: $50,125,787; sub-clinical: $70,750,556</div>
<div>Atlantic provinces: $36,374,397</div><div>Clinical mastitis: $12,854,903; sub-clinical: $17,685,660</div>
<div>Québec: $276,865,097</div><div>Clinical mastitis: $89,810,467; sub-clinical: $146,043,910</div>
<div>Ontario: $209,527,758</div><div>Clinical mastitis: $70,780,846; sub-clinical: $106,718,179</div>
<div><b>Sub-clinical mastitis (48%)</b> is the costliest, followed by clinical mastitis (34%), and materials and investment (mainly for applying preventive measures; 15%).</div>
<div>Most of the costs (72%) for <b>sub-clinical mastitis</b> are due to milk yield reduction, and 25% are due to culling.</div>
<div>In an average herd, most of <b>clinical mastitis costs</b> are due to culling and mortality (48%), and then milk yield reduction (35%).</div>

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