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[Pseudomonas septicemia after endoscopic interventions on the bile duct system].

In the first half of 1982 there was an increase in septicaemia cases, especially among patients with biliary-tract drainage. The septicaemia incidence rose from 1.25% to 4.4%. The proportion of Pseudomonas septicaemias was especially high: of 20 patients (21 episodes of septicaemia) nine had infections with Pseudomonas aeruginosa alone, three a mixed septicaemia. In ten of these twelve patients there was impaired drainage by a malignant tumour. Three patients with a tumour stenosis died, mainly of the septicaemia. The cause of this increased incidence of Pseudomonas septicaemias lay in contamination of the instruments; it was in part sustained by the Endo-Washer. The connection between the septicaemia after endoscopic-retrograde cholangiography and recontamination of the endoscope was discovered after sero- and pyocin-typing of the Pseudomonas strains. By changing the methods of disinfection the Pseudomonas incidence among endoscopies fell. However, in individual samplings Pseudomonas can still be demonstrated on instruments as well as on the Endo-Washer.