I went to school with a guy who had his spleen removed because of an accident & years later was playing with a puppy who bit his hand. Guess it killed him within a couple days. The story I heard is he had been advised to be careful about infections but didn’t think anything about getting nicked by the puppy.
We almost never stitch up a dog bite (or cat bite) and always start the patient on antibiotics immediately because they almost always get infected.