Adherence of mucoid and nonmucoid strains of Pseudomonas aeruginosa to tracheal epithelium was studied with a perfused-trachea model. The species specificity of adherence was studied by infecting tracheas from hamsters, guinea pigs, or mice. Perfused tracheas from hamsters were infected with strains
Forty pigs between 23 and 51 d of age were given, ad lib., diets containing 7.9 g lysine/kg. The diets contained wheat and one of five protein concentrates: milk, peanut (Arachis hypogaea) meal, cotton-seed (Gossypium herbaceum) meal, meat meal or lupins (Lupinus augustifolius). Twenty of the pigs