VEGFA and coinfection: Initial laboratory testing revealed an IgM Western Blot with a weak 23 (Osp C) and 41 kDa bands, and an IgG Western Blot with a weak 31 kDa (Osp A) and 93 kDa bands, with negative co-infection testing for Babesia (negative titers, negative Babesia FISH test), Ehrlichia, Anaplasma, Bartonella (negative titers for Bartonella henselae and Bartonella quintana with a negative VEGF), as well as negative testing for tularemia and rickettsial infections including Coxiella burnetti.