Sputum bacteriology in nursing home pneumonia: a retrospective study

Pneumonia is the most lethal infection in nursing homes. The Infectious Disease Society of America recommends that attempts be made to obtain quality sputum to focus antibiotic therapy. This is especially important within the enclosed space of a nursing home, where constant pressure from broad spectrum, empiric antibiotics sets the stage for the emergence of resistant organisms.

We reviewed all cases of radiographic pneumonia diagnosed on-site at the Wisconsin Veterans Home, a 721-bed facility, for the recording of sputum bacteriology and 30-day mortality.

Ninety-nine cases of radiographic pneumonia diagnosed on-site were identified over 1 year. Mortality was 10% within 30 days. Fourteen quality sputum specimens were obtained and processed microbiologically. None of the individuals who had a sputum specimen died within 30 days, probably because the ability to obtain a sputum specimen is a marker of higher functional status.

Even if empiric therapy continues in the majority of cases, cultures in individual cases may alert clinicians to noncovered, resistant pathogens, and allow focused antibiotic therapy with agents like amoxicillin that might extend the usefulness of empiric, broad spectrum antibiotics. Institutions may also sum the results of sputum bacteriology to assist in the choice of empiric antibiotic therapy. Sputum bacteriology may benefit both the individual resident and the entire population of the institution.