Fig 1.
Algorithm for the surveillance and laboratory diagnosis of pertussis.
a Clinical case definition and procedures for laboratory confirmation in accordance with the recommendations of the Global Pertussis Initiative (GPI) (Cherry at all, Clinical Definitions of Pertussis: Summary of a Global Pertussis Initiative Roundtable Meeting, February 2011. Clinical Infectious Diseases Advance Access published May 4, 2012); b Other diagnoses included bronchitis, bronchiolitis, laryngitis or tracheitis. PCR: polymerase chain reaction; IgG: immunoglobin G; PT: pertussis toxin.
Table 1.
Diagnosis at enrollment of the 1043 patients tested for Bordetella pertussis.
Table 2.
Demographic and clinical characteristics of participants.
Table 3.
Sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio of signs and symptoms of proposed case definitions of patients older than 4 with suspected pertussis infection.
Table 4.
Accuracy of certain sign/symptom combinations of GPI case definitions of pertussis in two age groups and different enrollment diagnoses.