What is the primary reason stool specimens are evaluated?

The primary reason stool specimens are evaluated is to screen for gastrointestinal diseases. Stool tests can provide crucial diagnostic information about the health of the digestive system. They are commonly used to detect the presence of pathogens such as bacteria, viruses, and parasites that can cause gastrointestinal infections. Additionally, stool specimens can reveal signs of malabsorption, bleeding, inflammation, and other gastrointestinal disorders like inflammatory bowel disease (IBD) and colorectal cancer.

In contrast, options referring to urinary infections, kidney function, or hydration levels do not align with the specific purpose of stool analysis. These aspects are typically assessed through urine tests or blood work, focusing on different bodily systems rather than the gastrointestinal tract. Thus, stool evaluation primarily serves to identify and diagnose diseases affecting the digestive system.