(1) Department of Virology, Faculty of Veterinary Sciences, National University of La Plata, 60 & 118, CC296, 1900 La Plata, Buenos Aires, Argentina (2) CICV-INTA, CC77, 1708 Morón, Buenos Aires, Argentina (3) National Research Council (CONICET), Av. Rivadavia 1917, C1033 AAJ, Buenos Aires, Argentina (4) Professional Assistant of the Scientific Research Commission (CIC), 10 & 526, 1900 La Plata...