AFP and encephalitis: Phylogenetic analysis of the VP1 sequences of E-19 strains revealed that the UP E-19 strains, (n = 9) with 96% to 100% NT IDs among them, were grouped together in a separate cluster (bootstrap value of 91%) and displayed NT IDs in the range of 96% to 98% with few of the other recently E-19 strains isolated from encephalitis patients, environmental specimens and AFP patients from different parts of India.