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Bacterial meningitis in older adults
Diedre Hofinger1, Larry E Davis
1From Internal Medicine and Infectious Disease Service, New Mexico VA Health Care System, 1501 San Pedro Dr. SE, Albuquerque, NM, 87108, USA, dhofinger@salud.unm.edu.
Opinion Statement:
The burden of disease due to bacterial meningitis is shifting toward older adults. Clinicians should maintain a high level of suspicion of meningitis in older adults, since they may present without classic signs and symptoms. Clinicians should remember that more older patients are at risk of healthcare-associated meningitis and may be at risk of more resistant organisms. A lumbar puncture should be performed as quickly as possible. If a CT scan is required before the lumbar puncture, blood cultures should be drawn and appropriate empiric antibiotics should be started before sending the patient to the CT scanner. Empiric antibiotics should be chosen based on patient history, review of patient's known illnesses and risk factors, results of CSF Gram stain, and local institution antibiotic resistance patterns. Clinicians should remember that Streptococcus pneumoniae may be resistant to penicillin and cephalosporins, so vancomycin is usually also administered until the bacterial resistance pattern is known. Adjunctive dexamethasone may be started before or at the time of antibiotic therapy based on risk versus benefit analysis, and may be discontinued if patient is found to not have Streptococcus pneumoniae meningitis.
Insights
Bacterial meningitis is increasingly affecting older adults, who may not show typical symptoms. Early diagnosis and prompt treatment, considering potential antibiotic resistance, are crucial for better outcomes in this population.
Area of Science:
- Medicine
- Infectious Diseases
- Geriatrics
Background:
- Bacterial meningitis burden is shifting towards older adults.
- Older adults may present with atypical symptoms, delaying diagnosis.
- Healthcare-associated meningitis and resistant organisms pose increased risks in this demographic.
Purpose of the Study:
- To highlight the changing epidemiology of bacterial meningitis.
- To emphasize the importance of early suspicion and diagnosis in older adults.
- To provide guidance on diagnostic and therapeutic strategies for meningitis in the elderly.
Main Methods:
- This is an opinion statement, not a research study.
- Recommendations are based on clinical experience and current understanding of bacterial meningitis.
- Guidance is provided on diagnostic procedures and empiric antibiotic selection.
Main Results:
- Older adults present unique challenges in meningitis diagnosis and management.
- Prompt lumbar puncture and appropriate empiric antibiotic therapy are critical.
- Consideration of antibiotic resistance patterns and adjunctive therapies like dexamethasone is advised.
Conclusions:
- Clinicians must maintain a high index of suspicion for meningitis in older adults.
- Timely diagnostic workup, including lumbar puncture, is essential.
- Empiric antibiotic choice should be guided by patient factors, local resistance, and Gram stain results, with vancomycin often necessary for suspected Streptococcus pneumoniae.
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