Staphylococcus aureus bacteremia: comparison of two periods and a predictive model of mortality



Document title: Staphylococcus aureus bacteremia: comparison of two periods and a predictive model of mortality
Journal: The brazilian journal of infectious diseases
Database: PERIÓDICA
System number: 000290728
ISSN: 1413-8670
Authors: 1
2
Institutions: 1Faculdade de Medicina de Marilia, Marilia, Sao Paulo. Brasil
2Universidade Federal de Sao Paulo, Divisao de Doencas Infecciosas, Sao Paulo. Brasil
Year:
Season: Dic
Volumen: 6
Number: 6
Pages: 288-297
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental
English abstract Staphylococcus aureus is an important pathogen causing bacteremia, primarily affecting hospitalized patients. We studied the epidemiology of S. aureus bacteremia, comparing two periods (early and mid 1990s) and developed a predictive model of mortality. A nested case-control was done. All 251 patients over 14 years old with positive blood cultures for S. aureus were selected. MRSA (methicillin resistant S. aureus) was isolated in 63% of the cases. When comparing the two periods MRSA community-acquired bacteremia increased from 4% to 16% (p=0.01). There was no significant difference in the mortality rate between the two periods (39% and 33%, p=0.40). Intravascular catheters provoked 24% of the cases of bacteremia and were associated with the lowest rate of mortality. In a logistic regression analysis, three variables were associated with death: septic shock, source of bacteraemia and resistance to methicillin. The probability of dying among patients with MRSA and those with methicillin sensitive S. aureus bacteraemia ranged from 10% to 90% and from 4% to 76%, respectively, depending on the source of the bacteraemia and the occurrence of septic shock. The MRSA found in Brazil may be a particularly virulent strain
Disciplines: Medicina
Keyword: Hematología,
Microbiología,
Salud pública,
Staphylococcus aureus,
Bacteremia,
Mortalidad
Keyword: Medicine,
Hematology,
Microbiology,
Public health,
Staphylococcus aureus,
Bacteremia,
Mortality
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