Discriminating pathogenic strains of streptococci

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What is it about Mycobacterium (compared to other bacteria) that allows for L-J media to even work (e.g, to be useful for this purpose)?

What is it about blood agar that makes it useful for discriminating pathogenic strains of Streptococci from non-pathogenic (normal flora) strains? Be specific.

Which media would be best for checking a water sample for potential E. coli contamination from sewage? Explain your answer.

Which media would be best for checking a food sample for the presence of Staphylococcus aureus, a common cause of food poisoning? Explain your answer.

Reference no: EM132555514

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