Home > Epidemics/Outbreaks, Pertussis > California whooping cough outbreak update 10-26-10

California whooping cough outbreak update 10-26-10


The California Department of Public Health has released the latest numbers, as of 10/26/10. Unfortunately, a new death has been recorded since I last reported on this outbreak.

  • 6,257 confirmed, probable and suspect cases of pertussis reported in 2010, for a staterate of 16 cases/100,000.
    • Case Classification:
      -Confirmed: ~67%  (4,192)
      -Probable: ~16%     (1,001)
      -Suspect: ~17%       (1,064)
  • This is the most cases reported in 60 years when 6,613 cases were reported in 1950, and the highest incidence in 51 years when a rate of 16.1 cases/100,000 was reported in 1959.
  • 154 (58%) of hospitalized cases were infants ❤ months of age, and 201 (75%) were infants <6 months of age.
  • 153 (76%) of the hospitalized infants <6 months of age with known race and ethnicity were Hispanic.
  • 10 deaths have been reported; 9 (90%) were Hispanic infants. Nine fatalities were infants <2 months of age at time of disease onset and had not received any doses of pertussis-containing vaccine;the 10th victim was an ex-28 week preemie that was 2 months of age and had received the first dose of DTaP only 15 days prior to disease
    onset.
  • Rates are highest in infants <6 months of age (317.2 cases/100,000), in children aged 7-9 years (46.8 cases/100,000) and children aged 6 months-6 years (38.4 cases/100,000)
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