[Residues of macrolide antibiotics in eggs following medication in the laying hen]

analyse microbiologique drug therapy eggs eritromicina erythromycin espiramicina food hygiene gallina ponedora galline ovaiole higiene de los alimentos huevos igiene degli alimenti layer chickens microbiological analysis oeuf poule pondeuse residues residui residuos servicios veterinarios servizi veterinari spiramicina spiramycin spiramycine terapia farmacologica tilosina tylosin tylosine uova veterinary services