Rapid streptococcal testing in Vietnamese children with pharyngitis.

Area of Science:

• Pediatric infectious diseases
• Microbiology
• Diagnostic test evaluation

Background:

• Streptococcal pharyngitis is a persistent public health concern in Vietnam.
• Accurate diagnosis of streptococcal pharyngitis has been challenging in this region.
• The need for reliable and rapid diagnostic tools is critical for effective patient management.

Purpose of the Study:

• To evaluate the clinical performance of a rapid streptococcal antigen detection test (Quick-Vue Flex Strep A) in children with pharyngitis in Vietnam.
• To compare the rapid test results against bacterial culture for accuracy.
• To assess the convenience and acceptability of the rapid test in a clinical setting.

Main Methods:

• A clinical trial involving 777 children diagnosed with pharyngitis at a hospital in Hanoi, Vietnam.
• Parallel testing of throat swab specimens using the Quick-Vue Flex Strep A rapid test and bacterial culture.
• Analysis of sensitivity, specificity, and clinical utility of the rapid test.

Main Results:

• The rapid test demonstrated 89% sensitivity and 92% specificity compared to bacterial culture.
• Specificity increased to 96% in children not previously treated with antibiotics.
• The test was found to be convenient and acceptable to both patients and healthcare providers.

Conclusions:

• The Quick-Vue Flex Strep A rapid test is a sensitive and specific tool for diagnosing streptococcal pharyngitis in Vietnamese children.
• Its ease of use and accuracy can facilitate appropriate antibiotic treatment, favoring penicillin over broad-spectrum agents.
• Implementing this rapid test may contribute to reducing the incidence of antimicrobial resistance in the future.