Detection of Chlamydia trachomatis inclusions in McCoy and HeLa-229 cells: an alternative staining technique using toluidine blue.

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Abstract
Toluidine blue staining was used to detect Chlamydia trachomatis inclusions in both McCoy and HeLa-229 cells from clinical specimens. This method was more sensitive than iodine staining for detecting C trachomatis inclusions in both McCoy and HeLa-229 cells and also more sensitive than Giemsa staining for detecting chlamydial inclusions in HeLa-229 cells. While its sensitivity for detection of chlamydial inclusions in McCoy cells is equal to that of Giemsa staining, toluidine blue staining is easier and faster to perform.