Table 1.
Blood culture results
| 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%) |
CNST* = coagulase-negative staphylococci;
Gram Positive+ = Species information available for 185 pts. in C2 (Age < 60=125, Age ≥ 60=65).