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  • Title: Flow cytometric analysis of Chlamydia trachomatis interaction with L cells.
    Author: Waldman FM, Hadley WK, Fulwyler MJ, Schachter J.
    Journal: Cytometry; 1987 Jan; 8(1):55-9. PubMed ID: 3542435.
    Abstract:
    Immunofluorescent staining and flow cytometric analysis have been investigated as means of studying the early stages of in vitro infection of Chlamydia trachomatis. The lymphogranuloma venereum strain of C. trachomatis was grown in vitro in L cells, fixed in p-formaldehyde, stained with fluorescein isothiocyanate (FITC)-conjugated monoclonal antibody to the chlamydial major outer membrane protein, and analyzed flow cytometrically. Infected cells stained 50-100 times more intensely than uninfected cells, and they could easily be discriminated by flow analysis. The number of infected cells and the fluorescence intensity of individual cells were proportional to the multiplicity of infection. The attachment of purified elementary bodies to L cells could be analyzed by immunofluorescence and flow cytometry. Cells exposed to 0.26 inclusion-forming units/cell could be discriminated from an unexposed population. Flow analysis of purified elementary bodies was possible after fluorescent staining with the aid of a laser-based cytometer and gating on low volume.
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