Pertussis Testing

Diagnosing Pertussis

Symptoms of pertussis manifest in three stages:

1. Catarrhal Stage: This stage is characterized by the onset of cold-like symptoms and a worsening cough, lasting 1-2 weeks.

2. Paroxysmal Stage: This stage includes the hallmark “whooping” cough, and some individuals may experience post-tussive vomiting.

3. Convalescent Stage: This stage is characterized by fewer coughing fits and a gradual recovery.

Classic pertussis can persist for up to 10 weeks, with the cough often lingering. Individuals who are vaccinated may experience a milder course of the illness.

Testing for Pertussis

If pertussis is suspected, consider PCR testing using a nasopharyngeal (NP) swab. The PCR test provides optimal sensitivity during the first 3 weeks of illness and is the most rapid diagnostic option available. 

While culture testing is considered the gold standard for pertussis diagnosis, it has a longer turnaround time. A culture, collected via a posterior NP swab or aspirate, is most effective when obtained within the first 2 weeks of illness.

All confirmed Pertussis cases should be reported to NYK Health via fax or phone call and using the EPID200 report form.