I don't live in Africa, the OP doesn't either I believe Mechanicsville is in Virgina? Either way the parasites and such from an African population are not going to be the same as a North American one.
I can't speak about other regions but all the Savs near me are captive breed.
I would assume that you also have two fecals a year done as well? (one not being 100% certain there are no parasites.) It is almost certain there are some parasites, this would hold true for most of a wild population.