Which enzyme activity is NOT produced by Serratia species?

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Multiple Choice

Which enzyme activity is NOT produced by Serratia species?

Serratia species have a characteristic set of extracellular enzymes, including DNase, gelatinase, and lipase. These activities are commonly observed and used to help identify Serratia in the lab. NADase, on the other hand, is a virulence-associated enzyme seen in certain streptococci (notably some group A Streptococcus species) and is not part of Serratia’s typical enzymatic repertoire. Because Serratia does not produce NADase, its presence would be inconsistent with Serratia’s usual enzyme profile. Therefore, NADase is the enzyme activity not produced by Serratia species.

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