TABLE 1.
Biotyping results obtained with three commercial test systems for 208 strains of Haemophilus influenzae and 172 strains of Haemophilus parainfluenzae
| Organisma | Biotype | Expected reaction with:
|
Total no. of isolates | IDS RapID NH system
|
NHI card
|
API NH strip
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of isolates correctly biotyped | No. of isolates with errors for:
|
No. of isolates correctly biotyped | No. of isolates with errors for:
|
No. of isolates correctly biotyped | No. of isolates with errors for:
|
||||||||||||
| Ornithine | Urease | Indole | Ornithine | Urease | Indole | Ornithine | Urease | Indole | Ornithine | Urease | Indole | ||||||
| Haemophilus influenzae | I | + | + | + | 23 | 23 | 0 | 0 | 0 | 22 | 1 | 0 | 0 | 23 | 0 | 0 | 0 |
| II | − | + | + | 105 | 7 | 98 | 0 | 0 | 105 | 0 | 0 | 0 | 102 | 2 | 0 | 1 | |
| III | − | + | − | 63 | 1 | 62 | 0 | 0 | 62 | 1 | 1 | 0 | 62 | 1 | 0 | 0 | |
| IV | + | + | − | 5 | 5 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | |
| V | + | − | + | 5 | 5 | 0 | 0 | 0 | 4 | 1 | 0 | 0 | 5 | 0 | 0 | 0 | |
| VI | + | − | − | 5 | 5 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | |
| VII | − | − | + | 2 | 2 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | |
| Total | 208 | 48 | 160 | 0 | 0 | 204 | 4 | 1 | 0 | 204 | 3 | 0 | 1 | ||||
| Haemophilus | I | + | − | − | 64 | 58 | 3 | 4 | 0 | 54 | 10 | 0 | 0 | 61 | 1 | 3 | 0 |
| parainfluenzae | II | + | + | − | 58 | 57 | 0 | 0 | 1 | 53 | 5 | 0 | 1 | 58 | 0 | 0 | 0 |
| III | − | + | − | 22 | 6 | 16 | 0 | 0 | 22 | 0 | 0 | 0 | 22 | 0 | 0 | 0 | |
| IV | + | + | + | 2 | 1 | 1 | 1 | 0 | 2 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | |
| V | − | − | − | 26 | 26 | 0 | 0 | 0 | 26 | 0 | 0 | 0 | 24 | 2 | 0 | 0 | |
| Total | 172 | 148 | 20 | 5 | 1 | 157 | 15 | 0 | 1 | 167 | 3 | 3 | 0 | ||||
a
Strains of H. influenzae biotype VIII and H. parainfluenzae biotypes VI, VII, and VII were not available for inclusion in this study.