Molecular characterization of Haemophilus parasuis ferric hydroxamate uptake (fhu) genes and constitutive expression of the FhuA receptorMaria Luisa del Río, Jesús Navas, Ana Judith Martín, César B. Gutiérrez, José-Ignacio Rodríguez-Barbosa and Elías F. Rodríguez FerriVet. Res., 37 1 (2006) 49-59DOI: https://doi.org/10.1051/vetres:2005039