Bacterial isolations from tracheal and bronchial washes obtained with the aid of a fibreoptic endoscope were carried out over a 7 month period in a feedlot on calves suffering from acute pneumonic pasteurellosis. Pasteurella
haemolytica and Pseudomonas aeruginosa represented the majority of Isolates. Antibiotic sensitivities of the Pasteurella isolates are reported on.
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