Table 1.

Resistance patterns by county for San Francisco Bay areaa

ResistanceIsolates from patients with invasive diseaseIsolates from patients with pharyngitis
SF County HospitalSF County other hospitalsAlameda CountyContra Costa County and otherSF County HospitalSF County other hospitalsAlameda CountyContra Costa County and other
Total isolates36 (26)43 (30)52 (44)26 (21)39771023
Tetracycline only2 (1)5 (4)01 (1)6901
Erythromycin only4 (4)00002b 11b
Erythromycin and tetracycline5 (4)2 (1)2 (2)05301
Erythromycin, tetracycline, and clindamycin1 (1)0000100
Erythromycin, tetracycline, and bacitracin4 (4)5 (4)11 (1)0000
Tetracycline (total)12 (10)12 (9)3 (2)2 (2)111302
Erythromycin (total)14 (13)7 (5)3 (2)1 (1)5612
Erythromycin (% of total)39 (50)16 (23)6 (5)4 (5)138109
  • a Numbers in parentheses are for a 12-month period in which throat isolates were collected; SF, San Francisco.

  • b Strains were not resistant to clindamycin even after induction.