Abstract
1 Research Laboratory for Infectious Diseases, Hospital Professor Edgar Santos, Federal University of Bahia, Salvador, Bahia, Brazil
2 Institute of Virology, University of Bonn Medical Centre, Bonn, Germany
3 Laboratory of Virology, Department of Microbiological Consumer Protection, Institute of Hygiene and the Environment, Hamburg, Germany
4 Clinical Virology Group, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
5 Department of Paediatrics, Hospital Professor Edgar Santos, Federal University of Bahia, Salvador, Bahia, Brazil
6 Chumakov Institute of Poliomyelitis and Viral Encephalitides, Moscow, Russia