80 



NATURE, FORMATION, AND ACTIVITIES 



Table 29 

 Susceptibility of 33 strains of Proteus to different antibiotics (Potee et al., 1954) 



*T = tetracycline; P = penicillin; Ct = chlortetracycline; Ot = oxytetracycline; Cm 

 phenicol; S = streptomycin; B = bacitracin; Pm = polymyxin. 



chloram- 



col and a definite increa.sc in the proportion 

 of strains resistant to chlortetracycline. 

 Treatment of patients with penicillin did 

 not appear to influence the susceptibility to 

 this antibiotic of strains of Proteus subse- 

 flLiently isolated from such patients. Strep- 

 tomycin-resistant strains were more fre- 



(|uent among patients previously treated 

 with this antil)iotic than among those who 

 had iKit received streptomycin. Cultures iso- 

 lated from patients treated with tetracy- 

 clines showed a larger proportion resistant 

 to these three antibiotics. 



The susceptibility of Pseudomonas cul- 



