Specimen Submission for Diagnostic Testing

Public health laboratories can forward approved specimens to CDC for specialized testing, including various assays for detecting and characterizing Mycoplasma pneumoniae. CDC uses molecular testing with multiplex real-time polymerase chain reaction (PCR) as the primary laboratory procedure for M. pneumoniae identification. CDC does not use culture or serological testing as routine diagnostic methods. Specimens identified as positive for M. pneumoniae by previous lab testing and/or upon testing at CDC will be subsequently tested for macrolide susceptibility.

For additional information, please refer to these pages for M. pneumoniae molecular detection and macrolide susceptibility genotyping.

Specimen Collection Protocol

CDC’s Specimen Collection Guidelines Cdc-pdfpdf icon[8 pages] detail how to collect tissue specimens, as well as upper (NP, OP) and lower (sputum, bronchial lavage fluid) respiratory tract specimens.

Request permission to swab patients for M. pneumoniae and other respiratory pathogen testing who meet at least one of the following criteria:

  • Cough for ≥ 3 days and fever ≥ 100.0°F (reported or documented)
  • Chest x-ray confirmed pneumonia
  • Erythema multiforme, Stevens-Johnson syndrome, or toxic epidermal necrolysis

Collect an OP and NP swab specimen

Use only sterile Dacron, rayon, or nylon swabs with plastic shafts. If available, use flocked swabs. DO NOT use calcium alginate swabs or swabs with wooden sticks, as they may contain substances that inactivate some agents and inhibit some molecular assays.

For OP swab specimens:

Insert swab into the posterior pharynx and tonsillar areas. Rub swab over both tonsillar pillars and posterior oropharynx and avoid touching the tongue, teeth, and gums.

For NP swab specimens:

Insert flexible shaft swab through the nares parallel to the palate (not upwards) until it contacts the nasopharynx. Indications of contact include encountering resistance and the distance equaling that from the ear to the patient’s nostril. Gently rub and roll the swab.

During the Collecting a Nasopharyngeal Swab Clinical Specimen video the clinician collects samples by swabbing the posterior nasopharynx. While this video is not specific to M. pneumoniae, the swabbing technique is the same.

Specimen Submission

View information about how to submit specimens to CDC , including a test directory, submission forms, and shipping information.

For additional information on investigating unidentified respiratory disease outbreaks, visit the Unexplained Respiratory Disease Outbreaks website.