| pertussis--a re-emerging infection? | seven cases of pertussis in patients aged between 1 and 6 months detected over 3 months were reported. paroxysmal cough (six cases), post-tussive vomiting (three cases) and poor feeding (three cases) were the most common presenting symptoms. bordetella pertussis was isolated from six patients. the total leucocyte counts were mildly increased (10.8-15.6x10(9)/l). the lymphocyte counts were markly raised (59-73%) and appear to be useful indicators of pertussis. it appears that herd immunity does n ... | 2004 | 14720490 |