Probably no worse than eating uncooked bugs or drinking untreated water in that part of the world.
There is a clip of Grylls on one of the late night shows where he talks about some of this and issues like letting go some diarrhea etc while on film and climbing a cliff wall.
Supposedly the elephant poop trick was told to him by an African tribesman as a last resort to get water. Grylls called it a low point in his career.