[Pseudomonas aeruginosa epidemiology in Egypt: study of 80 hospital strains isolated at Alexandria].

Eighty hospital strains of P. aeruginosa, isolated in Alexandria, were examined with the aid of three epidemiological markers (serotype, lysotype and O. N. P. G.-test). The most frequent serotypes in Alexandria are 0:11, 0:12, 0:2, 0:4, 0:6 et 0:1; this situation is different from those reported in European countries and in U. S. A. Sixty-five lysotypes were found and the strains of serotype 0:11 fall in fifteen lysotypes. One strain 0:12 was found O. N. P. G. positive.