Abstract
The Totiviridae family includes a number of viruses that can infect protozoan parasites such as Leishmania and Giardia and fungi like Saccharomyces cerevisiae. Some isolates of Trichomonas vaginalis are also infected with one or more double-stranded RNA (dsRNA) viruses. In this study, the frequency of Trichomonas vaginalis virus (TVV1) was evaluated in Iranian isolates of T.vaginalis in Tehran, Iran. One thousand five hundred vaginal samples were collected from patients attending obstetrics and gynaecology hospitals associated with Iran University of Medical Sciences in Tehran, Iran from October 2015 to September 2016. Trichomonas vaginalis isolates were cultured in Diamond's modified medium. Nucleic acids were extracted using a DNA/RNA extraction kit and RT-PCR was performed. Among 1500 collected vaginal samples, 8 (0.53%) cases of T.vaginalis infection were found. Half (4/8) of the T.vaginalis positive cases were infected with TVV1. Phylogenetic mapping indicated that the Iranian isolates were most closely related to TVV1-OC5, TVV1-UR1. Iranian isolates of T.vaginalis were infected with TVV1. The frequency of viral infection (TVV1) in T.vaginalis isolates found in this study is higher than previously reported in Iran.
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