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Table 1 Number of pertussis cases per season

From: Bordetella pertussis: an underreported pathogen in pediatric respiratory infections, a prospective cohort study

  First winter Second winter
Season 2008–2009 (n = 209 ) Season 2009–2010 (n = 373 )
Clinical suspicion of pertussis   
Clinical suspicion of pertussis (%) 22/209 (10,5) 49/373 (13,1)
Prospective PCR B, pertussis positive n/N (%) 2/22 (9,1) 7/49 (14,3)
No clinical suspicion of pertussis  
No clinical suspicion of pertussis (%) 187/209(89,5) 324/373 (86,9)
Material for retrospective PCR 0/187 (0,0) 257/324 (79,3)
Retrospective PCR B. pertussis positive, n/N (%) NA 7/257 (2,7)
Total number of Pertussis cases, n/N (%) 2/209 (1,0) 14/373 (3,8)
  1. NA: not applicable.