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:
$\begin{array}{lll}\text {TSI: K/ A } &\text {Indole: no color change }&\text {Lysine: no color change}\
\text {1 \% NaCL : no growth}&\text { Arginine: purple}&\text {Ornithine: no color change}\
\text {DNase: pink halo around the area of organism inoculum}
\end{array}$
The microbiologist cannot read the oxidase reaction due to the dark pigment. What can he do to help achieve a valid oxidase reaction?

Question

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:
$\begin{array}{lll}\text {TSI: K/ A } &\text {Indole: no color change }&\text {Lysine: no color change}\
\text {1 \% NaCL  : no growth}&\text { Arginine: purple}&\text {Ornithine: no color change}\
\text {DNase: pink halo around the area of organism inoculum}
\end{array}$
The microbiologist cannot read the oxidase reaction due to the dark pigment. What can he do to help achieve a valid oxidase reaction?

Quizplus · Accepted Answer

The Answer of 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:
$\begin{array}{lll}\text {TSI: K/ A } &\text {Indole: no color change }&\text {Lysine: no color change}\
\text {1 \% NaCL  : no growth}&\text { Arginine: purple}&\text {Ornithine: no color change}\
\text {DNase: pink halo around the area of organism inoculum}
\end{array}$
The microbiologist cannot read the oxidase reaction due to the dark pigment. What can he do to help achieve a valid oxidase reaction?

A Dark Pigmented Colony Is Isolated from the Leg Wound