Churria CDG, Sansalone PL, Machuca MA, et al. Tracheitis in a Broiler Chicken Flock Caused by Dual Infection with Cryptosporidium spp. (Apicomplexa: Cryptosporiidae) and Non-hemolytic Ornithobacterium rhinotracheale. Brazilian Journal of Veterinary Pathology. 2012;5(2):89-93. doi:10.24070/bjvp.1983-0246.005017