Can bacteria or parasite infections cause a change in bowel movement?

Yes, bacterial and parasitic infections can lead to changes in bowel movements. Such infections often cause diarrhea, constipation, or altered stool consistency due to inflammation in the gastrointestinal tract. Symptoms may also include abdominal pain, cramping, and nausea, as the body responds to the infection. It's important to seek medical attention if these symptoms persist, as they can lead to dehydration and other complications.