Hey Dana,
Infections of any kind can affect the frequency of CH. Gingivitis can also occur even when people have a good dental practice brushing daily. The problem is usually diet. Sugars and starches metabolize in the mouth to feed bacteria responsible for gingivitis. Avoiding sweets, brushing after meals, and high doses of vitamin C at 4 to 6 grams/day can do wonders.
Take care,
V/R, Batch