Teschoviruses are transmitted by the fecal-oral route, and different studies indicate that PTVs are abundant and ubiquitous in healthy pig populations.4-9 In fact, PTVs are generally nonpathogenic, and infected swine most often remain asymptomatic.10 However, some virulent variants can cause a variety of clinical conditions, the most severe of which is a nonsuppurative viral encephalomyelitis known as “Teschen-Talfan disease.”