It is possible that the elderly are at increased risk of infection
with multidrug-resistant organisms. In a review of
patients treated at hematology and oncology centers in
the United States and Canada an increased rate of detection
of isolates like methicillin-resistant Staphylococcus aureus
and vancomycin-resistant Enterococci in the elderly was observed.
The incidence of Klebsiella species with extendedspectrum
β-lactamase phenotyes was also found to be
highest among patients older than 65 years and younger
than 14 years