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Common infections in the elderly
1University of Arizona College of Medicine, Tucson.
Abstract:
Symptoms of infection in the elderly may be absent, vague or atypical. Infection should be suspected when an elderly patient presents with a decline in well-being or with non-specific symptoms such as falls, dizziness, confusion, anorexia or weakness. Common infections include bacterial pneumonia, urinary tract infection, intra-abdominal infections, gram-negative bacteremia and infection of decubitus ulcers. Antibiotic therapy is not recommended for asymptomatic bacteriuria or locally infected decubitus ulcers. Drug dosages should be adjusted for the age-associated decline in renal function and for hepatic or renal insufficiency. The trend in antibiotic therapy is evolving toward the use of third-generation cephalosporins instead of aminoglycosides to avoid the side effects of nephrotoxicity and ototoxicity. Pneumococcal, influenza and tetanus/diphtheria immunizations help prevent morbidity and mortality.
Insights
Infections in the elderly present atypically. Suspect infection with non-specific symptoms and adjust antibiotic therapy, prioritizing cephalosporins over aminoglycosides to prevent adverse effects.
Area of Science:
- Geriatrics
- Infectious Diseases
- Pharmacology
Background:
- Elderly patients often exhibit subtle or atypical signs of infection, complicating diagnosis.
- Non-specific symptoms like falls, confusion, or weakness can indicate underlying infection in older adults.
- Common infections in this demographic include pneumonia, UTIs, and bacteremia.
Purpose of the Study:
- To outline key considerations for diagnosing and managing infections in the elderly.
- To highlight appropriate antibiotic choices and the importance of dose adjustment.
- To emphasize preventive strategies like immunizations.
Main Methods:
- Review of clinical presentations of infections in geriatric populations.
- Analysis of current antibiotic treatment guidelines for the elderly.
- Discussion of pharmacokinetic/pharmacodynamic considerations in renal and hepatic impairment.
- Evaluation of vaccine efficacy in preventing common infections.
Main Results:
- Atypical symptoms necessitate a high index of suspicion for infection in the elderly.
- Asymptomatic bacteriuria and superficial decubitus ulcers do not typically require antibiotic treatment.
- Renal function decline impacts drug dosing, requiring careful adjustment.
- Third-generation cephalosporins are increasingly preferred over aminoglycosides due to a better safety profile (less nephrotoxicity and ototoxicity).
Conclusions:
- Prompt recognition of non-specific symptoms is crucial for timely infection diagnosis in older adults.
- Antibiotic stewardship is essential, avoiding treatment for asymptomatic conditions.
- Personalized pharmacotherapy, considering age-related physiological changes, improves outcomes.
- Vaccinations remain a cornerstone of preventing severe infectious morbidity and mortality in the elderly.