Exposure of cats to low doses of FeLV: seroconversion as the sole parameter of infection Andrea Major, Valentino Cattori, Eva Boenzli, Barbara Riond, Peter Ossent, Marina Luisa Meli, Regina Hofmann-Lehmann and Hans Lutz Vet. Res., 41 2 (2010) 17 Published online: 28 October 2009 DOI: 10.1051/vetres/2009065