Urine cultures were performed at intervals of three days to observe the development of bacteriuria during indwelling catheterization in 124 patients with various medical diseases who admitted at Department of Internal Medicine of Chungnam National University Hospital from October 1974 to October 1975.
The results were as follow:
1) The cultures were positive in 79(63.7%) out of 124 patients after 3 days, in 39(90.7%) out of 43patients after 6 days, in 23(100%) out of 23 patients after 9 days and in 12(100%) out of 12 patients after 12 days of indwelling catheterization.
2) The microorgarnisms cultured from the patients, who had retained indwelling catheter for 3 days, were E. coli(55.7%), klebsiella aerogenes (22.8%), staphylococcus aureus(5.1%), pseudomonas(5.1%), proteus(3.8%), staphylococcuss albus (2.5%), streptococcus(2. 5%), and paraeolon bacilli (2.5%) in order of frequency.
3) Two out of 12 patients, who had retained indwelling catheter for 12 days, revealed persisting bacteriuria for more than 2 months.
4) Bacteriuria developed in 61.2% of the patients with antibiotic treatment from the third day of catheterization, and in 74.2% of patients without antibiotic treatment.
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