We definitely know that Mrs Scorbic (the cook) has been bitten ("Today she was wearing [...] a white bandage around her throat.") and we can probably infer from some of the dialogues between the vampires that she's not an exception (for example, when the Count sees Vlad together with Agnes after the occupation of the castle, he greets his son as such: "Oh dear, Vlad... Playing with your food?" - I would imagine this is only partially facetious; Vlad even remarks himself that he turned two human girls/womans into obedient slaves before (by biting them) and that they now serve the court as maidens). After Granny is unconscious and laid out on a table as a "meal", Agnes is aghast: "'You're going to ... after all this talk, you're going to ... suck her blood?' 'We are vampires, Miss Nitt. It's a vampire thing. A little ... sacrament, shall we say.'" Considering all this (as well as the fact that the Count makes a specific point not to bite Verence, Magrat and the baby), I would imagine that some of the other castle staff/people from Lancre weren't spared, too. It's never lucidly expounded upon what turns one victim into a vampire and another one into a drone/lesser vampire (?), it may have something to do with the willpower of the affected, so we don't know what happens to them in the long run, either. I also don't think that any (or more than a handful) members of the Count's entourage at the end of the book was from Lancre, but it is not too far-fetched that they left the blood donors in Lancre, they never intended to leave the place permanently, after all.