Urgent Implementation of Point-of-Care Testing for Group A Streptococcal Infection in a UK Children's Emergency Department

Abstract

Objective In late 2022, Western Europe and the United States experienced increased incidences of scarlet fever and life-threatening invasive group A streptococcal (iGAS) infections, especially among children. The outbreak was widely reported in the media in the United Kingdom, leading to increased emergency department (ED) attendances and threatened supplies of antibiotics. Our ED rapidly introduced point-of-care testing for GAS pharyngitis with the aim of rationalizing antibiotic prescribing.

Methods We rapidly implemented the use of a molecular-based (polymerase chain reaction) point-of-care test for all children scoring 3 or higher on the McIsaac clinical prediction rule for GAS pharyngitis in children and performed a nested diagnostic accuracy study. The main outcome was concordance or discordance of antibiotic prescribing with the test result.

Results Between December 2022 and April 2023, a total of 1,388 patients underwent point-of-care test (45% female, 55% male, median age of 3 y). Based on medical records review, 571 (41%) patients were tested inappropriately (i.e., they did not have documented pharyngitis or similar infection). Antibiotic prescribing was largely appropriate for patients with a diagnosis of pharyngitis or similar presentation, with 20.47% of children with a negative test prescribed antibiotics.

Conclusion Antibiotic concordance was acceptable for children with pharyngitis and similar presentations, but nearly half of children without acute respiratory symptoms were tested inappropriately. EDs considering rapid implementation of point-of-care test in similar circumstances should ensure clear guidelines and training around their use so that clinically useful tests are not inadvertently dropped and resources are not wasted.

Keywords

group A Streptococcus - point-of-care test - children - emergency department

Publication History

Received: 25 June 2024

Accepted: 12 November 2024

Article published online:
05 December 2024

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