外来診療における細菌尿のスクリーニング -尿半定量培養のためのMicrostix-3の評価-

Abstract

A survey was carried out to determine the sort and frequency of microorganisms isolated from infected urines in the outpatient clinic for two years (1975, 1976). Microstix-3 test paper to screen a significant bacteriuria was also evaluated. E. coli was a most frequently isolated organism in 30-40% out of urinary pathogens and there was no big change in frequencies of other gram negative rods comparing with a survey in 1974. However, a tendency was found that gram positive cocci gradually increased in frequency. 70% of complete accuracy and 75% of allowable reliability were obtained from a comparison made between total bacterial count in Microstix-3 and colony count obtained from the standard bacterial culture in the central laboratory. This paper could also detect 84.3% of significant bacteriuria in the presence of infected urines with colony count more than 10[5]/ml. The part reacted to gram negative rods was useful for differentiating gram negative rods from gram positive cocci. When the part of nitrite color indicator turned a variable shade of red, it was convinced that a significant bacteriuria of gram negative rods more than 10[5]/ml existed in the specimen. In conclusion, Microstix-3 paper may be applicable to evaluate a bacteriuria in the outpatient clinic.