Positive ana with 1:640 tier, homogenous pattern. no symptoms of lupus, but do have throat pain with a heavy growth of serratia marcescens in throat culture. could any of this be related?

In general, a sore throat or throat infection is not caused by lupus

Serratia is usually a hospital acquired infection. In the absence of skin involvement, I agree that your having lupus is unlikely, but I suspect that you have an autoimmune disorder and have some degree of immunocompromise seeing that your throat culture showed heavy growth of serratia marcescens. We usually consult a specialist in infectious diseases to determine the best antibiotic to treat serr