Clinical symptoms of pertussis

1) catherrhal stage:first stage. lasts for 1-2 wks most infective stage. runny nose, nasal congestion, sneezing occassional cough, low grade fever. 2) paroxysmal stage: 2nd stage classical whooping cough and inspirational whoops, more at night where an average of 15 attacks in 24hrs. lasts for 1-6wks 3) convalescent stage: 3rd stage. cough with many complications: secondary bacterial pneumonia sub-conjugal hemorrhage, convulsions. lasts for weeks or months