Balantidium coli in pig farms suspected of porcine circovirus type 2 (PCV2) associated enteritis
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Emergence of the pandemic H1N1 2009 influenza A virus in swine herds in Poland
Iwona Markowska-Daniel, Kinga Urbaniak, Marian Porowski, Paweł Karbowiak, Andrzej Kowalczyk, Edyta Kozak, Zygmunt Pejsak