Throat swab (pharyngitis tonsillitis)

Notes

• The information given here is intended for use by healthcare professionals. Please see Lab Tests Online-UK for more general advice, links and background.
• Streptococcus pyogenes (group A streptococcus) is the prime cause of bacterial sore throat
• If diphtheria is suspected, contact the Consultant Microbiologist before submitting samples for investigation
• In all cases of recent foreign travel, diphtheria will be looked for automatically
• See also
  • Diphtheria
  • Meningococcus
  • EBV antibodies (glandular fever)
  • Mouth swab (oral thrush)

Sample requirements

Standard charcoal transport swab

Apply the swab firmly to the fauces

Place swab into transport medium

Required information

• Travel history
• Date of onset
• Membranous or pseudomembranous pharyngitis/tonsillitis
• Sore throat. Red throat. Rash.
• Penicillin allergy
• Recent, current and intended antibiotics

Storage/transport

Store and transport at room temperature. Samples should be transported to the laboratory with minimal delay.

Turnaround time

• Negative: 24 hours
• Positive: 48 hours

Significant results will be issued on the next working day after receipt.