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Published on: February 24, 2014
Rapid streptococcal testing in Vietnamese children with pharyngitis
Insights
A rapid antigen detection test accurately diagnosed streptococcal pharyngitis in Vietnamese children. This convenient test aids in appropriate antibiotic selection, potentially reducing antimicrobial resistance.
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.
Abstract:
Streptococcal pharyngitis has been a significant public health problem in Vietnam for many years. Accurate diagnosis of the infection, however, has been difficult. We carried out a clinical trial of a rapid streptococcal antigen detection test (Quick-Vue (R) Flex Strep A) on a population of 777 children with pharyngitis seen at the Institute for the Protection of Children's Health (Children's Hospital) in Hanoi, Vietnam. Bacterial culture was performed in parallel with the rapid test on simultaneously obtained throat swab specimens. The rapid test was found to be 89% sensitive and 92% specific (96% in children not on prior antibiotics) compared to culture. The test was also found to be convenient and acceptable to patients and clinicians. A significant benefit of the test is that those children found positive are more likely to be treated with penicillin rather than a broad spectrum antimicrobial, which in turn will reduce the likelihood of resistant infections in the future.
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