The Initial Screening of Gram-Negative Rods Is Done by Testing

question 45

Multiple Choice

The initial screening of gram-negative rods is done by testing for the use of the carbohydrate:

• A)glucose.
• B)sucrose.
• C)lactose.
• D)mannitol.

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Definitions:

Wet Mount

A preparation of a specimen in a liquid that allows the organisms to remain alive and mobile while they are being identified.

Mordant

A substance, such as iodine, that can intensify or deepen the response a specimen has to a stain.

Parasite

An organism that lives on or in a host organism and gets its food from or at the expense of its host.

Culture and Sensitivity

A laboratory test that involves growing bacteria or other microorganisms from a sample to identify the cause of an infection and determine which antibiotics will effectively treat it.