Epidemiological surveillance of Mycobacterium tuberculosis complex in extensively raised pigs in the south of Spain

Publication date: Available online 5 September 2018Source: Preventive Veterinary MedicineAuthor(s): David Cano-Terriza, María A. Risalde, Pablo Rodríguez-Hernández, Sebastián Napp, Manuel Fernández-Morente, Inmaculada Moreno, Javier Bezos, Vicente Fernández-Molera, José L. Sáez, Ignacio García-BocanegraAbstractThe role of domestic pigs in the epidemiology of Mycobacterium tuberculosis complex (MTC) is considered to be limited due to the characteristics of intensive production systems. However, in southwestern Spain, Iberian pigs are usually raised under extensive management systems, sharing their habitat with other domestic and wild species, some of which may act as reservoirs of MTC. Our objective was to determine the seroprevalence, risk factors, spatial distribution and spoligotypes of MTC circulating in extensively farmed pigs in Andalusia (southern Spain), a region with a high prevalence of tuberculosis in both cattle and wild boar populations. Serum samples from 3,622 extensively-raised Iberian pigs from 129 randomly selected farms were tested for antibodies against MTC using an indirect (P22) ELISA. Antibodies to MTC were detected in 82 pigs (2.3%; 95%CI: 1.8-2.8%). Seropositivity was significantly higher in sows (3.7%) than in fattening pigs (1.7%) (P = 0.0001). Herd prevalence was 24.8% (95%CI: 17.4-32.3%). Two risk factors were associated with MTC seropositivity on farms: herd size (higher seroprevalence on larger farms) (OR=1.001; 95%CI: 1.000–1.002)...
Source: Preventive Veterinary Medicine - Category: Veterinary Research Source Type: research