Table 2.
Microorganisms identified in elderly patients admitted with pneumonia
| Microorganism | NHAP (n = 58) | CAP (n = 151) | p value |
|---|---|---|---|
| Gram-positive bacteria | |||
| Streptococcus pneumoniae | 14 (24.1) | 29 (19.2) | 0.430 |
| Staphylococcus aureus | 7 (12.0) | 9 (5.9) | 0.152 |
| MSSA | 1 (1.2) | 2 (1.3) | 1.000 |
| MRSA | 6 (10.3) | 7 (4.6) | 0.196 |
| Other gram-positive species | 2 (3.4) | 5 (3.3) | 1.000 |
| Gram-negative bacteria | |||
| Pseudomonas aeruginosa | 5 (8.6) | 4 (2.6) | 0.119 |
| Haemophilus influenza | 0 | 2 (1.3) | 1.000 |
| Klebsiella pneumoniae | |||
| ESBL (+) | 0 | 2 (1.3) | 1.000 |
| ESBL (–) | 5 (8.6) | 7 (4.6) | 0.320 |
| Acinetobacter species | 3 (5.1) | 1 (0.6) | 0.066 |
| Moraxella catarrhalis | 0 | 0 | 1.000 |
| Other gram-negative speciesa | 0 | 1 (0.6) | 1.000 |
| Mycoplasma pneumonia | 6 (10.3) | 5 (3.3) | 0.076 |
| Unknown | 23 (39.6) | 89 (58.9) | 0.012 |
| Polymicrobial pathogens | 5 (8.6) | 2 (1.3) | 0.141 |
| Potentially drug-resistant pathogensb | 13 (22.4) | 15 (9.9) | 0.018 |
Values are presented as number (%).
NHAP, nursing home-acquired pneumonia; CAP, community-acquired pneumonia; MSSA, methicillin-sensitive Staphylococcus aureus; MRSA, methicillin-resistant Staphylococcus aureus; ESBL, extended-spectrum β-lactamase.
a
Other gram-negative species included Escherichia coli, Enterobacter sp., Serratia marcescens, and Legionella pneumophila.
b
Potentially drug-resistant pathogens included MRSA, Pseudomonas sp., Acinetobacter sp., Stenotrophomonas maltophilia, and ESBL-producing Enterobacteriaceae.