Concurrent infections with vectore-borne pathogens associated with fatal hemolytic anemia in a cattle herd in Switzerland - Hofmann-Lehmann, R; Meli, ML; Dreher, UM; Gonczi, E; Deplazes, P; Braun, U; Engels, M; Schüpbach, J; Jörger, K; Thoma, R; Griot, C; Stärk, KD; Willi, B; Schmid, J; Kocan, KM; Lutz, H (J Clin Microbiol, 2004)