Maternal β-hemolytic streptococcal pharyngeal exposure and colonization in pregnancy.

Subjects with laboratory evidence of recent strep exposure (defined as either ASO or anti-DNase B antibody titers of equal to, or more than, the ULN value during pregnancy), showed a trend toward an association with asthma when compared with unexposed individuals (33.3% versus 11.1%, P = 0.003 considering Bonferroni correction). 4.

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