Figure 1. Incidence (cases per 1,000 admissions) of human listeriosis and serotype distribution of all isolates, National Taiwan University Hospital, Taipei, Taiwan, 1996–2008. Forty-six isolates were available for analysis, including 2 serotype 4b isolates from fetomaternal transmission in 2005 and 2006 and 1 serotype 4b from a pediatric patient (2005). Isolates from fetomaternal transmission were considered to be the same.
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