Which of the following is a rapid method to screen sputum specimens for the yeast Cryptococcus neoformans?

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Cryptococcus neoformans possesses urease,an enzyme that hydrolyzes urea,releasing ammonia as an end product.The production of ammonia changes the pH to alkaline and is detected in the medium by a pH indicator (phenol red)change from yellow to magenta.The coagulase test separates the pathogen Staphylococcus aureus from the other staphylococci.Indole and oxidase tests are mostly used for gram-negative organisms.

Which of the Following Is a Rapid Method to Screen