Related Experiment Videos
Evaluation of new streptococcal latex grouping kit
A F Vicca1, R E Stansfield, R G Masterton
1Central Microbiological Laboratories, Western General Hospital, Edinburgh.
Journal of Clinical Pathology
|January 1, 1993
Summary
A new streptococcal latex grouping kit from Shield Diagnostics was evaluated against the Streptex kit. Both kits demonstrated comparable performance in grouping streptococci and enterococci strains, with no significant differences observed overall.
Area of Science:
- Clinical microbiology
- Diagnostic test evaluation
- Bacterial identification
Background:
- Accurate and rapid identification of streptococci is crucial for patient management.
- Latex agglutination tests are commonly used for grouping streptococci.
- Evaluating new diagnostic kits is essential for improving laboratory efficiency.
Purpose of the Study:
- To assess the performance of a novel streptococcal latex grouping kit (Shield Diagnostics).
- To compare the Shield kit with an established method (Streptex; Wellcome Diagnostics).
Main Methods:
- A total of 247 streptococcal and enterococcal strains were tested.
- Both kits were used according to manufacturer instructions by a single operator.
- Discordant or un-grouped strains were identified to the species level.
Main Results:
- The Shield kit identified 232 isolates in 15 minutes, comparable to Streptex (224-233 isolates).
- The Shield kit showed higher detection rates for Enterococcus faecium on short incubation (p=0.007).
- Both kits had similar reaction strengths, but Streptex produced fewer tests with visible granularity.
Conclusions:
- The Shield Diagnostics kit exhibited comparable performance to the Streptex kit for streptococcal grouping.
- No significant overall performance differences were noted between the two latex agglutination kits.
- Familiarization with the Shield kit's characteristics is recommended for new users.