[Hospital infection by e coli 0111: b4 and pseudomonas aeruginosa (author's transl)].

An endemic hospital infection caused by E. coli 0111:B4 together with Pseudomonas aeruginosa was observed in a county hospital over the period October 1973 till January 1974, which could not be brought under control by routine preventive measures against cross-infections established on the wards. By hospital sanitary examinations the waste water in the sinks and the hand-basins in some rooms of the newborn nursing wards were identified as sources.