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Escherichia coli in Bacteremia: K and O Antigens and Serum Sensitivity of Strains from Adults and Neonates
W. R. McCabe, B. Kaijser, S. Olling, M. Uwaydah and L. Å. Hanson
The Journal of Infectious Diseases
Vol. 138, No. 1 (Jul., 1978), pp. 33-41
Published by: Oxford University Press
Stable URL: http://www.jstor.org/stable/30111245
Page Count: 9
You can always find the topics here!Topics: Bacteremia, Antigens, Infections, Escherichia coli, Neonates, Terminal illnesses, Bacterial diseases, Health outcomes, Blood, Escherichia coli meningitis
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Comparisons of O- and K-antigenic types and serum sensitivity were carried out with 149 strains of Escherichia coli isolated from adults with bacteremia and 46 strains from neonates with bacteremia. O-antigenic types O6, O4, O2, O16, O18, and O7 were observed most frequently, but their relative prevalence did not differ materially between adult and neonatal bacteremias. A greater proportion of strains from neonatal bacteremia contained K1 antigen and were autoagglutinable compared with strains from adult bacteremia, although K1 was the most frequent K antigen found in strains from adults. K-antigen-containing strains did not appear to be associated with enhanced severity of bacteremia, but nontypable strains, autoagglutinable strains, and strains of O-antigenic types O4, O6, and O8 were associated with a greater frequency of shock and fatal outcome in adults. No differences could be detected between the serum sensitivities of E. coli isolated from adult bacteremia and those from neonatal bacteremia. K antigen did not affect serum sensitivity, but E. coli strains of O types O18, O2, O4, and O7 were more serum-resistant than other E. coli. Bacteremia caused by serum-sensitive E. coli was less often associated with shock and death than bacteremia caused by serum-resistant E. coli.
The Journal of Infectious Diseases © 1978 Oxford University Press