Geospatial analysis applied to seroepidemiological survey of canine leishmaniosis in east-central Portugal

article

Pires, Humberto
Martins, M.V.
Matos, A.C.
Cardoso, Luís
Monteiro, Fernando
Roque, N.
Nunes, Telmo
Gottstein, Bruno
Cortes, Helder

PIRES, H., Martins, M.V., Matos, A.C., Cardoso, L., Monteiro, F., Roque, N., Nunes, T., Gottstein, B., Cortes, H., Geospatial analysis applied to seroepidemiological survey of canine leishmaniosis in east-central Portugal. Veterinary Parasitology. Volume 274, 2019,

10.1016/j.vetpar.2019.108930

Geospatial analysis applied to seroepidemiological survey of canine leishmaniosis in east-central Portugal

Dogs
Epidemiology
GIS
Leishmania
Portugal
Serology

2019-11-23T00:01:46Z
2019-11-23T00:01:46Z
2019

Despite the high prevalence of canine Leishmania infantum infection in Portugal, significant differences associated with different risk factors can be found between geographically contiguous areas. In this study, a geographical area within the central region of Portugal (municipalities of Proença-a-Nova, Mação and Vila de Rei) was investigated. An epidemiological survey involved the analysis by an indirect enzyme-linked immunosorbent assay of serum samples collected during the anti-rabies vaccination campaign from 282 dogs. Geospatial analysis showed the distribution of geospatial prevalence of leishmaniosis and has delimited two areas (clusters) with a statistically significant higher risk of seropositivity in dogs (p =  0.003 and p = 0.027, for clusters 1 and 2, respectively). The highest seroprevalence (56.0%; CI: 41.2-70.0) was found in Vila de Rei. Five land occupation types showed a possible influence on the geographic distribution of seropositivity, with statistically significant differences between seropositive and seronegative dogs. Land occupied by temporary irrigated crops (p =  0.026), olive groves (p =  0.013), complex cultural systems and parcelling (p =  0.021), open forests, logging and new plantations (p =  0.043) and watercourses (p =  0.012) influenced the geographical distribution of canine Leishmania infection. Seropositive dogs had a greater average area of occupied land (i.e. open forests, logging and new plantations) than the seronegative ones (3.1439 km2 versus 2.5650 km2, respectively; p =  0.043).
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