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A five-hour system for identification of bacteria.
The American Journal of Medical Technology
|July 1, 1979
Summary
A rapid five-hour protocol enables timely bacterial identification and antibiotic susceptibility testing from clinical samples. This accelerates the start of appropriate patient antibacterial therapy within 24 hours of specimen receipt.
Area of Science:
- Clinical Microbiology
- Infectious Diseases
- Diagnostic Bacteriology
Background:
- Timely bacterial identification and antibiotic susceptibility testing are crucial for effective patient treatment.
- Routine laboratory methods can involve significant delays in reporting results.
Purpose of the Study:
- To evaluate a novel five-hour protocol for bacterial identification and antibiotic susceptibility determination.
- To compare the efficiency and accuracy of the rapid protocol against routine laboratory methods.
Main Methods:
- A total of 9551 clinical specimens (urine, wound, sputum, throat) were processed using both the five-hour protocol and routine methods.
- Bacterial identification and antibiotic susceptibility results were compared between the two procedures.
Main Results:
- The rapid protocol achieved comparable identification results to routine methods for 87-95% of Enterobacteriaceae, staphylococci, and enterococci.
- Identification accuracy was lower (<50%) for unusual species like Providencia, P. maltophilia, and Acinetobacter.
- Antibiotic susceptibility results were reported within five hours for 97% of all strains, with 71% for P. aeruginosa.
Conclusions:
- The five-hour protocol significantly shortens the time to obtain bacteriologic identification and antibiotic susceptibility results.
- This rapid turnaround time facilitates earlier initiation of appropriate antibacterial therapy for patients.
- Further optimization may be needed for accurate identification of less common bacterial species.