I have Syphilis but had no sex in 2 years, is this possible?

I have been married for 24 years separated for 2 recently was tested for std i came back positive for syphilis my ex husband tells me is not him because we’ve not had sex for 2 years but he’s the only one I have been with i also was diagnosed with altered cells on my cervix can this be because the syphilis. Please let me know as it worries me a lot.

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