Infection caused by vancomycin-resistant Streptococcus sanguis II.

Area of Science:

• * Infectious Diseases
• * Microbiology
• * Antimicrobial Resistance

Background:

• * Vancomycin is a critical antibiotic for treating serious Gram-positive bacterial infections.
• * Viridans group Streptococcus species are common causes of bacteremia, particularly in immunocompromised patients.

Observation:

• * A case of bacteremia caused by vancomycin-resistant Streptococcus sanguis II is reported.
• * This isolate demonstrated resistance to vancomycin, a concerning finding for this typically susceptible species.

Findings:

• * The presence of vancomycin resistance in Streptococcus sanguis II challenges the reliability of vancomycin for all viridans group Streptococcus infections.
• * This case underscores the emergence of antimicrobial resistance in previously susceptible pathogens.

Implications:

• * Routine vancomycin susceptibility testing is recommended for all Gram-positive isolates from blood and sterile body fluids.
• * Clinicians should consider alternative treatment options for infections caused by viridans group Streptococcus species, especially in high-risk patients.
• * This finding necessitates ongoing surveillance for vancomycin resistance in clinically significant bacteria.