PMID: 7581342Sep 1, 1995Paper

Trichomonas vaginalis: ultrastructural bases of the cytopathic effect

The Journal of Eukaryotic Microbiology
A González-RoblesA Martínez-Palomo

Abstract

The in vitro cytopathic effect of Trichomonas vaginalis on epithelial cells was explored through the interaction of trophozoites of the virulent strain GT-10 with MDCK monolayers. The interaction was analyzed through electrophysiology, video microscopy, and transmission and scanning electron microscopy. Electrical measurements revealed that living parasites produced severe damage to the cell monolayers within 30 min, manifested as a rapid decrease in transepithelial resistance. Microscopic observations demonstrated that when placed in contact with epithelial cells, trichomonas formed clumps through interdigitations and transient plasma membrane junctions between adjacent parasites. Also, attached trophozoites adopted an ameboid shape. The in vitro cytopathic action of T. vaginalis on MDCK cells was initially evident by modifications of the plasma membrane, resulting in opening of tight junctions, membrane blebbing, and monolayer disruption. After 15 min of interaction the damage was focal, concentrating at sites where parasite clumps adhered to the monolayer. At 30 min practically all MDCK cells were dead, whether or not trichomonas were attached to them. These events were followed by detachment of lysed cells and complete disr...Continue Reading

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Citations

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