TY - SER AU - Portiansky,E.L. AU - Quiroga,M.A. AU - Machuca,M.A. AU - Perfumo,C.J. TI - Mycoplasma suis in naturally infected pigs: an ultrastructural and morphometric study KW - SUÍNO KW - EPIRITROZOONOSE KW - BACTÉRIA KW - INFECÇÃO ER -