A dark pigmented colony is isolated from the leg wound of a fisherman from Florida. The gram-negative rod grows on sheep blood and MacConkey agars. The organism provides the following reactions:

TSI: K/A Indole: no color change Lysine: no color change
1% NaCL: no growth Arginine: purple Ornithine: no color change
DNase: pink halo around the area of organism inoculum
The microbiologist cannot read the oxidase reaction due to the dark pigment. What can he do to help achieve a valid oxidase reaction?
A) Grow the organism under anaerobic conditions and retest
B) Grow the organism on a non-nutrient agar and retest
C) The oxidase test is not necessary for the identification of this organism
D) Perform a modified oxidase test

A

Health Professions

You might also like to view...

Your partner informs you that the 3-year-old boy you have been called to care for is breathing 28 times per minute. As a knowledgeable EMT, you would recognize:

A) a rapid rate. B) adequate breathing. C) a normal rate. D) inadequate breathing.

Health Professions

A cross-sectional occlusal radiograph will significantly distort the image of the teeth, making them appear circular or elliptical

Indicate whether the statement is true or false

Health Professions