M. Catherine McEllistrem* , John A. Kolano*, Margaret A. Pass†, Dominique A. Caugant‡, Aaron B. Mendelsohn§, Antonio Guilherme Fonseca Pacheco§, Jafar Razeq¶, Lee H. Harrison*†, and the Maryland Emerging Infections Program

Author affiliations: *University of Pittsburgh Graduate School of Public Health and School of Medicine, Pittsburgh, Pennsylvania, USA; †Johns Hopkins University Bloomberg School of Hygiene and Public Health, Baltimore, Maryland, USA; ‡World Health Organization Collaborating Centre for Reference and Research on Meningococci, Norwegian Institute of Public Health, Oslo, Norway; §University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA; ¶Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA