Factors associated with seroprevalence to Mycobacterium paratuberculosis in small-ruminant farms in the Madrid region (Spain)

caprin caprinos espagne farm management gestion de l'exploitation agricole goats manejo de fincas morbidite morbidity morbosidad mycobacterium paratuberculosis ovin ovinos petite exploitation agricole riesgo risk risque sheep small farms spain