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Medium: Casein agar

Culture: Nocardia asteroides
(inoculated in the center)

Results: Negative (no clearing zone of
hydrolysis). Majority of the strains
isolated from clinical specimens are
Nocardia asteroides. Casein hydrolysis by Nocardia brasiliensis occurs slowly. Occurrence rate of Nocardia
brasiliensis
is very low (~ 2%)

 

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