Verhoef-Pastoor, L.P.B.

outbreak noroviru foodborne virus strain genotype transmission foodborne outbreaks surveillance cluster source country norovirus outbreaks detection gastroenteriti sequence method study analysis number infection sample chapter water microbiol variant cruise vennema h koopman disease noroviruse network health europe illness netherland system shellfish investigation hepatitis database table contamination cruise ships period verhoef proportion model figure foodborne viruses vennema outbreak strain selection koopmans m virol profile laboratory fbve network consumption surveillance systems uitbraken region information reference value verhoef l result estimate patient report stool genotype profiles chain person bivalve european epidemiology approach event bivalve mollusks