Context: Using histological stains on expectorated samples from phlegm (also called "sputum"), scientists can identify MTB under a microscope. Since MTB retains certain stains even after being treated with acidic solution, it is classified as an acid-fast bacillus. The most common acid-fast staining techniques are the Ziehl–Neelsen stain and the Kinyoun stain, which dye acid-fast bacilli a bright red that stands out against a blue background. Auramine-rhodamine staining and fluorescence microscopy are also used.

Question: What's another word for "sputum"?
Answer: phlegm

Question: One of the two standard acid-fast staining techniques is the Kinyoun stain; what's the other?
Answer: Ziehl–Neelsen stain

Question: What color will acid-fast bacilli become when stained?
Answer: bright red

Question: What's the term for bacillus that can be exposed to acidic solutions without losing their stains?
Answer: acid-fast

Question: If a scientist didn't want to use an acid-fast staining technique, what type of microscopy could they use instead?
Answer: fluorescence

Question: What is another name for an expectorated sample?
Answer: Unanswerable

Question: What removes all stains from MTB?
Answer: Unanswerable

Question: What is another name for the Kinyoun stain?
Answer: Unanswerable

Question: What become blue when stained?
Answer: Unanswerable

Question: What color is Auramine-rhodamine staining?
Answer: Unanswerable