The swarming gram-negative bacillus that can be presumptively identified based on a positive indole test is

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In the interests of cost containment, many clinical laboratories use an abbreviated identification scheme for identification of commonly isolated enterics (NCCLS, 35A). A spot indole test can be used to quickly separate swarming Proteae, such as P. mirabilis and P. penneri, which are negative, from the indole-positive P. vulgaris.

The Swarming Gram-Negative Bacillus That Can Be Presumptively Identified Based