We identified a novel human parechovirus (HPeV) type (K251176-02) from a neonate with fever. Analysis of the complete genome showed K251176-02 to be a new HPeV genotype. Since K251176-02 could not be neutralized with antibodies against known HPeV serotypes 1-3, it should be classified as a fourth HPeV serotype.

Iwo Bialynicki-Birula,* Zofia Bialynicka-Birula, and Cezary Śliwa Center for Theoretical Physics, Al. Lotników 32/46, 02-668 Warsaw, Poland Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland Institute of Physics, Al. Lotników 32/46, 02-668 Warsaw, Poland College of Science, Al. Lotników 32/46, 02-668 Warsaw, Poland ~Received 1 June 1999; published 16 February 2000!