Bacterial pathogens of the lower respiratory tract of calves from Brazilian rural settlement herds and their association with clinical signs of bovine respiratory disease - Gaeta, Natália C; Ribeiro, Bruno L. M; Alemán, Mario A. R; Yoshihara, Eidi; Nassar, Alessandra F. C; Marques, Lucas M; Timenetsky, Jorge; Gregory, Lilian (Pesquisa Veterinária Brasileira, 2018)