Characterisation of Yersinia Secretion Apparatus - Pathogenicity Island (Ysa-PI) of Yersinia enterocolitica 1B/O8 in Poland: an Idle Ysa Is a Specific Hallmark of the Epidemic Sensu Stricto Strain Journal title: Polish Journal of Microbiology Authors: Tomasz Wołkowicz, Katarzyna Zacharczuk, Natalia Rokosz-Chudziak, Waldemar Rastawicki, Rafał Gierczyń... Subject(s):