What diseases do non-pyogenic streptococci cause?

Usually no pathogeni: Non-pyogenic streptococci represent a diverse group of streptococci that are normal inhabitants of the mouth, throat and occasionally the gastrointestinal tract.  'silent bacteraemia' can occur especially in individuals with poor dental hygiene or gum disease. This can result in endocarditis amongst vulnerable individuals, especially those with underlying conditions such cancers, diabetes, heart

Endocarditis.: The non pyogenic organisms are common in the mouths of those with poor dental hygiene. They can invade the bloodstream and land on heart valves causing endocarditis - an infection of the heart valves. This can be very serious so don't forget to floss and brush.