Increasing infant pertussis hospitalization and mortality in south Texas, 1996 to 2006.
Pertussis admissions ranged from 0 to 7.4 per 10,000 hospitalizations from 1996 to 2003, and from 16.3 to 27.4 per 10,000 hospitalizations from 2004 to 2006. A total of 78% of patients were <4 months old, and 52% had a sick contact that was a family member. A total of 29% of patients required intensive care unit admission, and 3 died during the last 2 years of the study.
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