Wouldn't that be considered a culture?

A culture is done to find out what type of bacteria the snake has to be able to treat it with the right medication in order to get rid of the infection.

So, yes, a vet could do that, but it definitely would not be for free like stated in the post above. Not sure how much your vet would charge you, but a culture would be $110 for what my vet charges. So, try to figure it would cost somewhere around there.