The Seventh International Conference on the Genetics of Streptococci, Lactococci, and Enterococci

Volume 189, no. 4, p. 1209-1218, 2007. Page 1210, column 2, first complete paragraph, the last three sentences should be replaced with the following: “Newly appearing type 19A strains account for most of the increased antibiotic resistance now seen within the serotype. Work performed by Beall's collaborator, Angela Brueggemann, depicted how a new invasive type 19A variant appears to have arisen following horizontal transfer of a 39-kb DNA fragment containing serotype 19A capsule and flanking penicillin-binding protein genes from an ST199 donor strain to a serotype 4 ST695 recipient strain. Serotype 4 capsular polysaccharide corresponds to one of the seven vaccine serotypes successfully targeted by PCV7. This single genetic replacement event appears to account for the rapid emergence of this vaccine escape 19A variant on the ST695 background.”