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Table 1 Blood culture results

From: Ambulatory consolidation chemotherapy for acute myeloid leukemia with antibacterial prophylaxis is associated with frequent bacteremia and the emergence of fluoroquinolone resistant E. Coli

  C#1 C#2 (p-value)
Total Number of Patients 196 187  
Age < 60 140 126  
Age ≥ 60 56 61  
% Male 107 (54.6%) 98 (52.3%)  
At least one blood culture positive (% of patients) 43 (21.9%) 59 (31.6%) P=0.03
1 culture positive 37 (86%) 53 (90%) NS
2 or more cultures positive 6 (14%) 6 (10%) NS
Patients with Gram Positive isolates (% of Patients) 35 (17.9%) 46 (24.6%) 0.11
Patients with Gram Negative isolates (% of patients) 11 (5.6%) 20 (10.7%) 0.07
Gram Positive vs. Gram Negative P=0.0002 P=0.0004  
Total number of positive blood cultures: 49 65  
Monomicrobial cultures (% of total cultures) 45 (91.8%) 60 (92.3%) NS
Polymicrobial cultures (% of total cultures) 4 (8.2%) 5 (7.7%) NS
Total number of isolates: 53 71  
Age < 60 40 44  
Age ≥ 60 13 27  
Clinical Isolates (% of patients)    
Gram Positive + 35 (17.9%) 46 (24.6%) P=0.10
CNST* 19 (9.7%) 23 (12.4%) NS
Corynebacterium 5 (2.6%) 2 (1.1%)  
Micrococcus 4 (2.0%)   
Enterococcus 1 (0.5%) 3 (1.6%)  
Staphyloccoccus. aureus 2 (1.0%) 1 (0.5%)  
Streptococcus species 9 (4.6%) 16 (8.6%) P=0.11
Streptococcus viridins 6 (3.1%) 13 (7.0%)  
Streptococcus viridians/Streptococcus oralis - 1 (0.5%)  
Streptococcus mitis 2 (1.0%) -  
Streptococcus auralis - 1 (0.5%)  
Streptococcus spp. 1 (0.5%) 1 (0.5%)  
< age 60 with Strep. 6 (4.3%) 14 (11.2%) P=0.033
≥ age 60 with Strep. 3 (5.36%) 2 (3.3%) NS
Other Gram Positive 1 (0.5%) 4 (2.1%)  
Gram Negative 11 (5.6%) 20 (10.7%) P=0.07
Age < 60 8 (5.7%) 9 (7.1%) NS
Age ≥ 60 3 (5.4%) 11 (18%) P=0.035
Eschericia coli 1 (0.5%) 10 (5.3%) P=0.005
Klebsiella 2 (1.0%) 5 (2.7%)  
Enterobacter 3 (1.5%) 1 (0.5%)  
Pseudomonas spp. 4 (2.0%) -  
Other Gram Negative 1 (0.5%) 4 (2.1%)  
Yeast - 1 (0.5%)  
  1. CNST* = coagulase-negative staphylococci;
  2. Gram Positive+ = Species information available for 185 pts. in C2 (Age < 60=125, Age ≥ 60=65).