TABLE 2.
Summary of pilus expression and colony morphology by site of isolation
| Site of isolation | % Piliateda | % Spreading/corroding colony typeb |
|---|---|---|
| Total | 64 (41/64)c | 49 (20/41) |
| Respiratory | 79 (22/28) | 50 (14/28) |
| Blood nonendocarditis | 79 (11/14) | 29 (4/14) |
| Focal invasive | 36 (8/22) | 9 (2/22) |
| Joint fluid | 43 (6/14) | 14 (2/14) |
| Bone | 25 (1/4) | 0 (0/4) |
| Blood endocarditis | 25 (1/4) | 0 (0/4) |
a
Percent piliation is lower in focal invasive isolates than in respiratory and blood nonendocarditis isolates (chi-square test, P = 0.02).
b
Percent spreading/corroding colony type is lower in blood endocarditis and focal invasive isolates than in respiratory isolates (chi-square test, P = 0.008).
c
The values in parentheses are the number of isolates with that morphology/total number of isolates.