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Southern Italy, particularly Campania region, is an area where canine leishmaniasis (CanL) and zoonotic human visceral leishmaniasis (VL) are endemic. The red fox ( Vulpes vulpes ) has been hypothesized to play a role in occurrence of CanL in Italy but specific studies are poor. The aim of the present survey was to investigate the prevalence of  Leishmania  infection in dogs and foxes living in the same rural area (Picentini hills). 123 sera from autochthonous fox-hunting dogs were examined by immunofluorescent-antibody test (IFAT) using a cut-off of 1:160. The seroprevalence of dogs examined was 17.9%. Moreover, 48 foxes were examined after having been shooted by hunters or road accidents. Spleen, liver and lymph node samples were analyzed by specific  Leishmania  nested PCR (n-PCR). 10 foxes were found infected by  L. infantum  (20.8%) of which 4 animals in spleen, 2 in lymph nodes and 4 both in spleen and lymph nodes. The overall n-PCR positivity was 17.4% for spleen samples and 13.3% for lymph nodes; all liver samples resulted negative. In positive PCR foxes no signs clearly referable to leishmaniasis were recorded at necropsy. The results confirmed the presence of  L. infantum  infection in red foxes from Southern Italy, with a moderate level of exposure. Because large proportions of dogs with ascertained progressive leishmaniasis show a prolonged "subpatent condition" during which they are only positive to n-PCR before seroconversion, our results allow to assume that exposure risk in foxes is lower than hunting dogs living in the studied area.

Epidemiological survey on Leishmania infection in red foxes ( Vulpes vulpes ) and hunting dogs sharing the same rural area in Southern Italy