A lot? Trichinosis has almost been eliminated in pork. An old study looking for a particular parasite found little to none depending on the product. Here is another study showing very low incidence of parasites in meat products, but also includes fresh produce in the study which had higher rates than some meats.
So I disagree that “A lot” is correct.
Assuming it perforates the intestine - big infection from fecal matter getting into the abdominal cavity. It’s called peritonitis, and AFAIK it’s pretty much fatal if untreated. Severe abdominal pain as the infection spreads, all the vomiting and diarrhea cleans you out, and then the infection starts to shut your intestines and the rest of your organs fail while you go into sepsis and die. It’s not fast, either. It can take several days.