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United States geographic bacteria susceptibility patterns. 1997 ASCP Susceptibility Testing Group
Abstract:
Antimicrobial drug resistance in bacterial pathogens continues, with 1997 seeing reports of Staphylococcus aureus no longer fully susceptible to vancomycin occurring in the United States. To better deal with this rapidly developing problem, we present the third year of United States national data that highlights the geographic nature of increasing resistance to antimicrobial agents. In 1997, we observed increasing numbers of vancomycin-resistant Enterococcus faecium, more methicillin-resistant Staphylococcus aureus (MRSA), and an apparent spreading of penicillin resistance in pneumococci. The majority of reporting sites now indicates that over 20% of Pseudomonas aeruginosa are fully resistant to ciprofloxacin, the only oral agent available for treating this pathogen. With increasing resistance coming at a time of decreasing available resources, it is more clear than ever before that the future of infectious diseases and clinical microbiology remains filled with challenge.
Insights
Antimicrobial resistance is increasing in the US, with concerning trends in vancomycin-resistant Enterococcus faecium, methicillin-resistant Staphylococcus aureus (MRSA), and penicillin resistance in pneumococci. This rise in drug resistance poses significant challenges for infectious disease treatment.
Area of Science:
- Microbiology
- Infectious Diseases
- Public Health
Background:
- Antimicrobial drug resistance (AMR) is a growing global health concern.
- Reports of bacterial pathogens exhibiting reduced susceptibility to antibiotics have increased.
- The United States has been monitoring national trends in antimicrobial resistance.
Purpose of the Study:
- To present the third year of United States national data on antimicrobial resistance.
- To highlight the geographic patterns of increasing resistance to antimicrobial agents.
- To assess the current status of resistance in key bacterial pathogens.
Main Methods:
- Analysis of national surveillance data from reporting sites across the United States.
- Monitoring trends in resistance for specific bacterial pathogens including Staphylococcus aureus, Enterococcus faecium, Streptococcus pneumoniae, and Pseudomonas aeruginosa.
- Tracking resistance to key antimicrobial agents such as vancomycin, methicillin, penicillin, and ciprofloxacin.
Main Results:
- In 1997, an increase in vancomycin-resistant Enterococcus faecium was observed.
- Methicillin-resistant Staphylococcus aureus (MRSA) prevalence continued to rise.
- Penicillin resistance in Streptococcus pneumoniae showed signs of spreading.
- Over 20% of Pseudomonas aeruginosa isolates were resistant to ciprofloxacin at most reporting sites.
Conclusions:
- The geographic spread of antimicrobial resistance in the US is evident.
- Increasing resistance rates, coupled with decreasing resources, present significant challenges for infectious disease management and clinical microbiology.
- Urgent strategies are needed to combat the escalating threat of antimicrobial resistance.