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K. Oba, I. Takagi; The Detection Rate of Bacterial Flora From N-s Tube. Invest. Ophthalmol. Vis. Sci. 2007;48(13):2684.
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It is reported that the detection rate of bacterial flora from the conjunctival sacs of Japanese patients is 63.5%. Nunchaku-Style silicone tube (N-S tube) is popularly used for the patients with the obstruction in the tear drainage system. We examined the detection rate of bacterial flora from N-S tube and the kinds of bacterium.
We analized 114 cases who had undergone direct silicone tube intubation from January 2003 to December 2005 at Kyushu Medical Center in Japan. The series comprised 16 males and 98 females age ranged from 1 to 95 years, average 61.8 years. After the intubation, we prescribed 0.1% fluorometholone and levofloxacin for all patients and also washed the nasolacrimal duct with normal saline solution once a week. The N-S tubes were removed 1 to 238 days, average 86.3 days, after the intubation and were subjected to cultivation test.
Twenty one kinds of bacterial strains were isolated from 82/114 cases (72.8%). Corynebacterium sp. was the most frequent (39 cases), and the others were 10 of Staphylococcus.sp (CNS), 5 of Staphylococcus aureus (MSSA), 4 of Streptococcus pneumoniae and Streptococcus sp., 2 of Staphylococcus aureus (MRSA, ptococcus oralis,indigenous bacteria of oral cavity(α-streptococcus, and Candida glabrata , one each of other 12 kinds, 32 of no bacterium. The detection rate of bacterial flora was significantly higher in those patients removed the tube over 100 days (82.6%) compared with those under 100 days (70.3%).
The detection rate of bacterial flora from N-S tube was higher than that from conjunctival sacs, and grew higher in accordance with the span is protracted in Japanese patients.
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