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Published on: February 23, 2014
Is methicillin-resistant Staphylococcus aureus pneumonia epidemiology and sensitivity changing?
Elsi Diaz1, Imelyn M Fernandez, Lohengrin Jimenez
1Christus Spohn Memorial Hospital, Corpus Christi, Texas, USA.
Methicillin-resistant Staphylococcus aureus (MRSA) pneumonia is a growing threat. While resistance to clindamycin is increasing, trimethoprim/sulfamethoxazole (TMP/SMX) remains effective against both community- and hospital-acquired MRSA pneumonia.
Area of Science:
- Infectious Diseases
- Pulmonology
- Clinical Microbiology
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) pneumonia presents a significant and evolving threat due to high resistance and virulence.
- The rapid changes in MRSA pneumonia epidemiology and antibiotic sensitivity highlight its potential to become a
- super bug
- .
Purpose of the Study:
- To evaluate the incidence of community-acquired (CA-MRSA) and hospital-acquired (HA-MRSA) pneumonia at Christus Spohn.
- To assess the antibiotic susceptibility patterns of MRSA pneumonia in this patient population.
Main Methods:
- Retrospective analysis of inpatient charts from Christus Spohn Memorial Hospital (2006-2008).
- Patient selection based on positive MRSA sputum cultures and adherence to CDC, ATS, and IDSA guidelines.
- Categorization into CA-MRSA and HA-MRSA pneumonia groups.
Main Results:
- Increased resistance to clindamycin was observed in both CA-MRSA and HA-MRSA isolates.
- Trimethoprim/sulfamethoxazole (TMP/SMX) demonstrated preserved sensitivity against both CA-MRSA and HA-MRSA.
Conclusions:
- Clindamycin resistance in MRSA pneumonia has risen over time.
- TMP/SMX maintains its efficacy against MRSA, suggesting it should be reconsidered as a treatment option.
- TMP/SMX is a viable therapeutic choice for both CA-MRSA and HA-MRSA pneumonia, particularly CA-MRSA.
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