Staphylococcus aureus bacteremia in patients with acute leukemia

Area of Science:

• Infectious Diseases
• Hematology
• Oncology

Background:

• Staphylococcus aureus bacteremia poses a significant risk to patients with acute leukemia.
• Granulocytopenia is a common comorbidity in these patients, increasing susceptibility to infection.

Purpose of the Study:

• To investigate the natural history and outcomes of Staphylococcus aureus bacteremia in acute leukemia patients.
• To evaluate the efficacy of current treatment protocols and explore potential modifications.

Main Methods:

• Retrospective analysis of 370 patients with acute leukemia over a 10-year period.
• Identification of bacteremia origin, treatment regimens, and patient outcomes, including complications like endocarditis.

Main Results:

• 37 episodes of Staphylococcus aureus bacteremia occurred in 32 patients (9%).
• Granulocytopenia (<1,000/microliter) was present in 95% of episodes, with skin and respiratory tract as common origins.
• 83% of patients improved with a median treatment of 21 days (14 IV, 7 oral); however, only 1 of 6 patients in shock improved (p<0.001).

Conclusions:

• Endocarditis is rare in acute leukemia patients with Staphylococcus aureus bacteremia.
• Shorter treatment courses than those typically recommended for endocarditis may be justified in this patient population.