title: A disinfectant delivery system for control of micro-organisms in urine collection bags.
abstract: We developed a formaldehyde delivery system for urine collection bags and evaluated its effectiveness in suppressing the growth of bacteria in simulated human urine. The system was composed of paraformaldehyde in a polymeric carrier. We determined that inoculation of small numbers of Escherichia coli and Pseudomonas aeruginosa in urinary bags with a continuous flow of synthetic urine (40-80 ml h-1) quickly gives rise to high levels of contamination. This single tablet delivery system, however, proved bacteriostatic or bactericidal for both organisms over the 10-day lifespan. The formaldehyde concentration in the synthetic urine was c. 90 micrograms ml-1 or more during tests.
mesh_terms: D004203:Disinfection / Q000379:methods*; D004926:Escherichia coli / Q000187:drug effects; D005557:Formaldehyde; D006801:Humans; D011108:Polymers; D011550:Pseudomonas aeruginosa / Q000187:drug effects; D013242:Sterilization / Q000379:methods*; D014546:Urinary Catheterization / Q000295:instrumentation*; D014556:Urine / Q000382:microbiology*
chemical_list: D011108:Polymers; D005557:Formaldehyde; C003043:paraform