The efficacy of the MicroTrak (Syva Co., Palo Alto, Calif.) direct immunofluorescence test for the detection of Chlamydia trachomatis was compared with cell culturing of fresh specimens obtained from patients attending a clinic on sexually transmitted disease and of frozen specimens delayed in transit from urban or remote physicians' offices and clinics. Direct immunofluorescence testing detected C. trachomatis more frequently than culturing of the same specimens when transit caused a delay in culturing.
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Williams et al. (1985) studied this question.
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