R. Franiczek et S. Jankowski, SYNERGISTIC EFFECT OF CEFOTAXIME AND NORMAL HUMAN SERUM ON BACTERICIDAL ACTIVITY AGAINST URINARY STRAINS OF ESCHERICHIA-COLI WITH CAPSULAR ANTIGEN K1, Acta Microbiologica Polonica, 42(3-4), 1993, pp. 243-250
About 11 % of Escherichia coli strains isolated from patients with uri
nary tract infections produced capsular antigen K1. In a group of stra
ins resistant to normal human serum the percentage of strains with K1
antigen was higher than that without this antigen. Cefotaxime and seru
m showed synergistic action in the bactericidal reaction against E. co
li strains resistant to the serum. Lack of synergistic effect of therm
ally inactivated serum with subminimal concentrations of cefotaxime in
dicated participation of complement in this reaction.The antibiotic us
ed in subminimal concentrations caused significant elongation of E. co
li bacilli.