Prevalence of Toscana virus antibodies in residents of Croatia.

To assess the prevalence of Toscana virus (TOSV) infection among healthy residents of Croatia we tested sera from 2016 persons, for IgG antibodies to TOSV, by an enzyme immunoassay. A total of 755 (37.5%) persons had IgG antibodies to TOSV: 53.9%, 33.6% and 6.1% among residents of the islands, coastal area and mainland of Croatia, respectively. Risk factors significantly associated with seropositivity to TOSV were: living on islands (OR, 11.10; 95% CI, 6.02–20.50; p <0.001) or in coastal areas (OR, 6.96; 95% CI, 3.81–12.71; p <0.001) and increase of age (OR, 1.03; 95% CI, 1.02–1.03; p <0.001).