TABLE 1.
Identification of Yersinia species by different identification systems
| Species as determined by conventional testing (n) | No. of correct identifications by:
|
No. (species) of incorrect identifications by:
|
||||||
|---|---|---|---|---|---|---|---|---|
| API 20E | API Rapid 32E | Micronaut E | YeASa | API 20E | API Rapid 32E | Micronaut E | YeAS | |
| Y. enterocoliticaT (1) | 1 | 1 | 1 | 1 | ||||
| Y. enterocoliticab (12) | 12 | 11 | 12 | 12 | 1 | |||
| Y. enterocoliticac (58) | 55 | 5 | 52 | 44 | 2 (NTd) | 6 (NT) | 3 (Yersinia frederiksenii) | 14 |
| 1 (Havnia alvei) | 42 (Yersinia intermedia), 4 (Yersinia frederik-senii), 1 (Havnia alvei) | 1 (Serratia sp.) | ||||||
| 2 (Havnia alvei) | ||||||||
| Y. pseudotuberculosis (20) | 18 | 17 | 17 | 20 | 2 (NT) | 3 (NT) | 3 (NT) | |
| Y. intermedia (17) | 3 | 12 | 1 | 14 | 2 (NT) | 4 (NT) | 2 (NT) | 3 |
| 12 (Yersinia enterocolitica) | 1 (Yersinia frederiksenii) | 13 (Yersinia enterocolitica) | ||||||
| 1 (Yersinia frederiksenii) | ||||||||
| Other Yersinia species (10) | 4 | 4 | 2 | 10 | 2 (NT) | 2 (NT) | 1 (NT) | |
| 1e (Havnia alvei) | 1 (Havnia alvei) | 4 (Yersinia enterocolitica) | ||||||
| 3 (Yersinia enterocolitica) | 1 (Yersinia intermedia) | 1 (Yersinia kristensenii) | ||||||
| 2 (Yersinia enterocolitica) | 1 (Salmonella pullorum) | |||||||
| 1 (Citrobacter sp.) | ||||||||
| Totalf (118) | 93 | 50 | 85 | 100 | 25 | 68 | 33 | 18 |
a
YeAS, Yersinia enterocolitica Amplification Set.
b
Y. enterocolitica strains of enteropathogenic serovars.
c
Y. enterocolitica strains of apathogenic serovars.
d
NT, not typeable.
e
Indicated as differential diagnosis.
f
Total percent correct identifications by API 20E, API Rapid 32E, Micronaut E, and the Yersinia enterocolitica Amplification set were 79, 42, 72, and 85%, respectively.