Altering Trends in the Dominance of <i>Shigella flexneri</i> Serotypes and Emergence of Serologically Atypical <i>S. flexneri</i> Strains in Dhaka, Bangladesh

Abstract

Of 469 recently isolated Shigella flexneri strains, 452 agglutinated with Shigella flexneri-specific monoclonal antibodies. Of these, 396 could be assigned to 10 of the currently recognized 15 serotypes, with S. flexneri 2b dominating (23.2%). Of the 56 untypeable strains which showed invasive properties, 17 were serologically atypical and the remaining 39 belonged to a new serotype.