Subject(s)
Anus Neoplasms/surgery , Condylomata Acuminata/surgery , Genital Neoplasms, Female/surgery , Genital Neoplasms, Male/surgery , Adult , Anus Neoplasms/pathology , Condylomata Acuminata/pathology , Female , Genital Neoplasms, Female/pathology , Genital Neoplasms, Male/pathology , Groin , Humans , Male , Middle Aged , Penile Neoplasms/pathology , Penile Neoplasms/surgeryABSTRACT
One hundred twenty-five strains of Diplococcus pneumoniae and one hundred twenty-five strains of other alpha-hemolytic streptococci were planted on horse red cell-Brucella agar, and a disk of methicillin was placed on each inoculated plate. All strains were incubated anaerobically at 37 C for 24 h and then exposed to air at 6 C for 48 h. All strains of pneumococci produced a ring of beta-hemolysis surrounding the zone of inhibition produced with the methicillin disk, whereas no strain of alpha-hemolytic streptococci produced beta-hemolysis. It is suggested that this new criterion is useful for the differentiation of pneumococci from other alpha-hemolytic streptococci in those cases where other characteristics were insufficient for an unequivocal identification.