M191-1

Throat: No group A, C, G beta hemolytic Streptococcus, no Arcanobacterium haemolyticum – Shipped May 13, 2019 –

HISTORY

A simulated throat swab sample collected from 5 year old with sore throat was sent to category A and C laboratories.

Participants were expected to report the sample as negative for group A, C, G Streptococcus and Arcanobacterium haemolyticum.

MAIN EDUCATIONAL POINTS from M191-1

  1. Moraxella catarrhalis and Staphylococcus aureus are part of the commensal respiratory flora. Therefore, reporting these organisms from throat swabs may be clinically misleading resulting in unnecessary treatment.
  2. Negative reports from throat swab should always be pathogen specific (i.e. No Group A, C or G streptococci isolated).

Full critique (PDF)

Posted in Clinical Bacteriology Results, critiques