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[High risk factors lead to noscomial pulmonary infections caused by MRSA]
1Department of Internal Medicine, 3rd Affiliated Hospital, Sun YatSen University of Medical Sciences, Guangzhou 510630, China.
Objective:
To investigate major risk factors leading to death by noscomial MRSA pulmonary infections.
Method:
The data of hospitalized patients diagnosed as noscomial MRSA pulmonary infections were sorted out and analyzed for recent three years.
Results:
Case mortality of 64 patients with noscomial MRSA pulmonary infections were 44%. Of these, 18 cases complicated fungi, 11 Klebsiella pneumoniae, 9 Pseudomonas maltophilia and 7 Enterococcus. Case mortality of fungi and Pseudomonas maltophilia were 67% and 61%, respectively. 23 cases had fever, 18 died (case mortality 78%) and 41 had no fever, 10 died (case mortality 24%) (chi 2 = 15.253, P < 0.005). The case mortality with reduction, normal and increase of leukocyte were 80%, 24% and 45%, respectively. The comparison between three groups had obvious significance (chi 2 = 12.554, P < 0.005) and the case mortality of leukocytopenia was higher than that of other two groups (chi 2 = 8.626, P < 0.005). The case mortality of hypoproteinemia was higher than that of the control group (chi 2 = 6.914, P < 0.01). The patients who developed fulminant lesions in liver, kidneys and lungs showed higher mortality rate.
Conclusions:
Case mortality of noscomial pneumonia caused by MRSA is very high. In addition to common causes, underling diseases, leukocytopenia, malnutrition and complex infections are also risk factors of MRSA infection.
Insights
Nosocomial (hospital-acquired) MRSA pulmonary infections have a high mortality rate. Key risk factors include fever, leukocytopenia, malnutrition, and co-infections with fungi or Pseudomonas maltophilia.
Area of Science:
- Infectious Diseases
- Critical Care Medicine
- Hospital Epidemiology
Context:
- Hospital-acquired infections (HAIs) pose a significant threat to patient outcomes.
- Methicillin-resistant Staphylococcus aureus (MRSA) is a major pathogen causing severe nosocomial infections.
- Pulmonary infections due to MRSA are associated with high morbidity and mortality.
Purpose:
- To identify and analyze the primary risk factors contributing to mortality in patients with nosocomial MRSA pulmonary infections.
- To evaluate the association of specific clinical and laboratory findings with fatal outcomes.
Summary:
- A retrospective analysis of 64 patients with nosocomial MRSA pulmonary infections revealed a 44% case mortality rate.
- Significant risk factors for mortality included the presence of fever (78% mortality), leukocytopenia (80% mortality), hypoproteinemia, and co-infections with fungi (67% mortality) and Pseudomonas maltophilia (61% mortality).
- Fulminant organ damage in the liver, kidneys, and lungs also correlated with increased mortality.
Impact:
- This study highlights the critical need for early detection and management of risk factors in patients with hospital-acquired MRSA pneumonia.
- Findings underscore the importance of considering co-infections and host factors like nutritional status and immune cell counts in treatment strategies.
- Results can inform clinical guidelines and infection control practices to reduce mortality from these severe infections.