To cultivate Francisella in the laboratory, a medium supplemented with which of the following ingredient(s) is necessary?
a. Cysteine and cystine
b. Blood and cysteine
c. Dopa-cysteine
d. Nicotinic adenine
A
Blood, chocolate, and MacConkey agars cannot be used for the primary isolation of organisms belonging to the genus Francisella. Francisella is a facultative, intracellular pathogen that re-quires cysteine and a source of iron for growth.
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What will be an ideal response?
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