Format

Send to

Choose Destination
Infect Control Hosp Epidemiol. 1998 Jan;19(1):32-7.

Risk factors for mortality in Staphylococcus aureus bacteremia.

Author information

1
Infectious Diseases Division of Marilia Medical School, São Paulo, Brazil.

Abstract

OBJECTIVE:

To analyze risk factors for, and the role of methicillin resistance in, mortality in Staphylococcus aureus bacteremia.

DESIGN:

Nested case-control study.

SETTING:

General teaching hospital with a high prevalence of methicillin-resistant Staphylococcus aureus (MRSA) strains, in São Paulo, Brazil.

PATIENTS:

136 patients over 14 years old with documented S aureus bacteremia. Those who died were compared with those who survived at least 14 days.

RESULTS:

Mortality within 14 days of bacteremia was 39% (53/136). Mean age was 47 years. Hospital-acquired bacteremia represented 86% (117/136) of episodes. In 26% (35/136), infection was related to an intravascular catheter and in 13% (17/136) to the respiratory tract. Septic shock occurred in 22% (30/136) of cases. MRSA was isolated in 66% (90/136). Multivariate analysis identified three variables that were significantly and independently associated with mortality: site of entry (lung, odds ratio [OR], 17.0; unknown, OR, 12.3; others, OR, 6.6); occurrence of shock (OR, 8.9), and resistance of S aureus to methicillin (OR, 4.2).

CONCLUSION:

Our study shows that S aureus bacteremia has a high mortality, especially when the lung is the source of infection and when shock develops; resistance to methicillin may be another risk factor for poor outcome.

PMID:
9475347
DOI:
10.1086/647704
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center