[1] Univ Barcelona, Fac Biol, Dept Microbiol, Barcelona, Spain
[2] Poultry Hlth Ctr Catalonia & Aragon, Tarragona, Spain
[3] Univ Patras, Sch Med, Dept Publ Hlth, GR-26110 Patras, Greece
[4] Natl Inst Environm Hlth, Dept Water Microbiol, Budapest, Hungary
[5] Univ Basque Country, Dept Microbiol Immunol & Parasitol, UPV EHU, Vitoria, Spain