Sádde merkoša šleađgaboasttain: Seroprevalence of <i>Ehrlichia</i> spp., <i>Anaplasma</i> spp., <i>Borrelia</i> <i>burgdorferi sensu lato</i>, and <i>Dirofilaria immitis</i> in Stray Dogs, from 2016 to 2019, in Southern Italy