Question

mannitol salt agar (msa) is selective for which bacterial genus? proteus pseudomonas escherichia streptococci

Explanation:

Mannitol Salt Agar (MSA) is selective for Staphylococcus. Among the given options, none of them are Staphylococcus, but if we consider based on the characteristics of MSA which is a high - salt medium and can inhibit the growth of many non - halotolerant bacteria. Staphylococcus can grow on MSA due to its halotolerance. However, if we assume there is a mis - typing in the last option and it is supposed to be Staphylococcus (as Streptococcus does not grow well on MSA), then that would be the correct answer.

Answer:

None of the above (assuming the last option is mis - typed and should be Staphylococcus)