VAN den BROEK P. J. (1989): Antimicrobial. VAN den BROEK P. J. (1989): ... S. T. (1989): 'Bergey's manual of determina- tive bacte. & Wilkins. .... von wenigstens 10 Sauen untersucht worden waren, erwiesen sich > 30 % der Tiere als ... necessary to assess human health risks A farm was classified as T. gondii-positive.
