CHLORAMPHENICOL RESISTANCE OF STRAINS OF SALMONELLA TYPHI ISOLATED FROM TYPHOID FEVER PATIENTS HOSPITALIZED AT THE HOSPITAL OF INFECTIOUS AND CONTAGIOUS DISEASES IN THE CITY OF GUAYAQUIL IN THE YEARS 1961, 1962 AND 1963
RESISTENCIA AS CLORANFENICOL DE LAS CEPAS DE SALMONELLA TYPHI, AISLADAS DE PACIENTES FEBRILES INGRESADOS AS HOSPITAL DE ENFERMEDADES INFECTO--CONTAGIOSAS DE LA CIUDAD DE GUAYAQUIL, EN LOS A NOS 1961, 1962 Y 1963