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. 2017 Jul 19;65(9):1523–1531. doi: 10.1093/cid/cix599

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© The Author 2017. Published by Oxford University Press for the Infectious Diseases Society of America. All rights reserved. For permissions, e-mail: journals.permissions@oup.com.

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Figure 3. — Representative individual antibody responses toemm cluster–related and non-cluster-related M peptides. The average fold change between enzyme-linked immunosorbent assay (ELISA) titer from pre- and postinfection sera from 3 individual patients to N-terminal peptides from the M protein of the infecting group AStreptococcus (GAS) strain, allemm cluster–related GAS, and 7 non-cluster-related GAS strains. The figures represent the 3 different antibody response patterns observed: high response to infecting-type andemm cluster–related peptides (A), high response to infecting-type peptide only (B), and high response to infecting-type,emm cluster–related, and non-cluster-related peptides (C). Error bars represent the standard error of the mean.