Occurrence of porcine Tescho-, Sapelo- and Enteroviruses in fecal, brain and foetal/placental samples of Swiss pigs

Dr.med.vet Thesis by Tamara Stäubli

Porcine enteric picornaviruses, including porcine Teschovirus (PTV), Sapelovirus (PSV) and Enterovirus (PEV) are viral agents infecting pigs and wild boars (Güllich Donin et al., 2014; Cano-Gómez et al., 2017). Most types are considered apathogenic (Cano-Gómez et al., 2017; Yang et al., 2018). However, Teschoviruses, Sapeloviruses and Enteroviruses have also been associated with clinical diseases, including polioencephalomyelitis (Teschen/Talfan disease), diarrhea, reproductive disorders, respiratory distress (Krumbholz et al., 2003) and cutaneous lesions (Knowles, 1988). Diagnostic means to identify and differentiate the three virus groups have not been available in Switzerland until recently entero-pcr news. The prevalence and clinical meaning of these viruses in Swiss pigs is therefore largely unknown.

The present study aims at shedding light on the prevalence of the three virus groups in Swiss pigs by screening fecal samples for the presence of viral genomes. Due to the fact that the etiological agent of polioencephalomyelitis in pigs can often not be identified (Arruda et al., 2016), porcine brain samples will also be tested. Placenta or foetal samples from cases of reproductive disorders as well as healthy pigs will also be investigated.