Bacterial in almost all cases, viral might occur in people with suppressed immune systems, but it is infrequent and is less often referred to as "periodontal disease".
It is important to make ; at the beginning; a distinction between what viruses are ; and what bacteria are.Viruses are submicroscopic and non-motile. Their size range is usually from about 20...
It is a bacteria -- Treponema pallidum is the causative agent. That is why antibiotics do work to get rid of the infection -- most of the time. It is also why you can get reinfected, since this is a...