Most of them are caused by a fungus or bacterium which lives in the body all the time, normally quite harmlessly.
(Most of them; are caused; by a fungus or bacterium) (a fungus or bacterium; lives normally quite harmlessly; L:in the body; T:all the time)
Most of them a fungus or bacterium
are caused lives normally quite harmlessly
by a fungus or bacterium
L:in the body T:all the time