The source of sulfur for Hydrogen-Sulfide-producing bacteria in the Triple Sugar Iron Agar is

A. Sodium thiosulfate
B. Ferrous sulfate
C. Sodium sulfide
D. Ferric citrate
E. Sodium sulfate


Ans: A. Sodium thiosulfate

Biology & Microbiology

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An immunoassay was developed to rapidly diagnose patients infected with an emerging virus. However, the researchers discovered that some individuals were producing false negatives when tested, despite being infected with the virus. What might explain this?

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