| [isolation of highly divergent vaccine strains of polioviruses in slovakia]. | april 2003 was the first time in slovakia, when the vaccine derived poliovirus type 2 was isolated from waste water sampled from the waste water disposal plant in vrakun, which collects most waste from bratislava. the examination in the regional reference laboratory in helsinki revealed an almost 15% divergence from the vaccine strain and genetic identity with the sabine vaccine strain was only 86.6%. various cases of paralytic poliomyelitis have been published in world literature, caused by mut ... | 2004 | 15052831 |