Related Experiment Videos
Meningitis caused by multiply antibiotic-resistant viridans streptococci
Abstract:
Two patients are described with meningitis caused by multiply antibiotic-resistant strains of viridans streptococci; both isolates were resistant to penicillin (MIC greater than 3 micrograms/ml) (4.8 U/ml) and to several other antimicrobial agents. Our findings underscore the importance of doing in vitro sensitivity testing with clinical isolates of viridans streptococci to determine appropriate therapy for infected patients. Multiply antibiotic-resistant strains of viridans streptococci have also been recently isolated in the same populations in South Africa in which the prevalence of resistant Streptococcus pneumoniae is high. Therefore, isolation of resistant clinical strains of viridans streptococci may suggest the need for in vitro surveillance of emerging antibiotic resistance in both streptococcal species.
Insights
Two patients developed meningitis from multiply antibiotic-resistant viridans streptococci, highlighting the need for antibiotic sensitivity testing. This finding suggests broader surveillance for antibiotic resistance in streptococcal species is crucial.
Area of Science:
- Microbiology
- Infectious Diseases
- Clinical Medicine
Background:
- Meningitis can be caused by various bacteria, including viridans streptococci.
- Antibiotic resistance in bacterial pathogens is a growing global health concern.
- Viridans streptococci are part of the normal flora but can cause opportunistic infections.
Observation:
- Two cases of meningitis were identified, both caused by multiply antibiotic-resistant strains of viridans streptococci.
- These isolates demonstrated resistance to penicillin and multiple other antimicrobial agents.
- Similar resistant strains have been observed in South Africa, alongside resistant Streptococcus pneumoniae.
Findings:
- Clinical isolates of viridans streptococci exhibited significant antibiotic resistance.
- Penicillin resistance was confirmed with Minimum Inhibitory Concentration (MIC) > 3 µg/ml.
- The study emphasizes the necessity of in vitro sensitivity testing for guiding treatment.
Implications:
- In vitro sensitivity testing is essential for effective treatment of viridans streptococci infections.
- The emergence of resistant strains warrants increased surveillance for antibiotic resistance in streptococcal species.
- This could inform public health strategies and antimicrobial stewardship programs.