▁vital ▁for ▁developing ▁new ▁ways ▁to ▁control ▁their ▁spread . ▁Second , ▁there ▁has ▁been ▁food ▁poison ing ▁cases ▁associated ▁with ▁fruit ▁and ▁veget ables ▁cont amin ated ▁with ▁b acter ia , ▁such ▁as ▁Sal mon ella ▁and ▁E . ▁col i ▁O 1 5 7 : H 7 . ▁This ▁is ▁particularly ▁true ▁of ▁fresh ▁f ruits ▁and ▁sal ads ▁which ▁are ▁not ▁cook ed ▁prior ▁to ▁consumption . ▁Pre vent ing ▁these ▁out break s ▁by ▁developing ▁better ▁de cont am ination ▁strateg ies ▁is ▁important ▁to ▁protect ▁public ▁health . ▁For ▁micro organ isms ▁the ▁ph yll os phere ▁can ▁be ▁considered ▁a ▁host ile ▁environment ▁however , ▁since ▁there ▁is ▁a ▁limited ▁avail ability ▁of ▁nut ri ents , ▁strong ▁sun ▁ir rad iation ▁and ▁variation ▁in ▁water ▁avail ability . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁A ▁BBC ▁news ▁article ▁about ▁a ▁sal ad - associ ated ▁food ▁poison ing ▁out break ▁ ▁Link ▁to ▁one ▁of ▁many ▁scholar ly ▁review ▁articles ▁about ▁ph yll os phere ▁micro bi ology ▁ ▁Category : M icro bi ology ▁terms ▁Category : B ot any <0x0A> </s> ▁Town ▁People ▁() ▁is ▁a ▁ 1 9 7 5 ▁Soviet ▁drama ▁film ▁directed ▁by ▁Vladimir ▁Rog ovo y . ▁ ▁Plot ▁ ▁The ▁film ▁tells ▁about ▁a ▁good ▁and ▁decent ▁tax i ▁driver ▁who ▁meets ▁new ▁people ▁every ▁day . ▁Some ▁people ▁bring ▁him ▁joy , ▁others ▁bring ▁problems . ▁ ▁Cast ▁▁ ▁Nikol ay ▁K ry uch kov ▁as ▁tax