Description of values of test status

Test Value Meaning
+ 90-100% Positive
- 0-10% positive
(+) 76-89% positive
(-) 11-25% positive
d 26-75% positive
v strain instability

escherichia

Unique Tests Hierarchy for Seperation from other Organisms

1Methyl Red+
2Voges-proskauer-
3Urease-
4h2s Production-
5Oxidase-
6Lipase-
7Catalase production+