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The present study describes first clinically detected and confirmed by laboratory methods case of PMWS in Poland. The investigation was carried out in a large farrow-to-finish farm producing 40 000 fatteners per year. In the spring of 2000, growth retardation, wasting and respiratory disorders affected 20% of weaners and 30% of fatteners. Nineteen weaners and 11 fatteners with different degrees of...
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