Final answer:
Necrotizing enterocolitis (NEC) can be diagnosed through imaging, endoscopy, lab tests, and stool samples. The detection of the toxin in stool samples confirms the diagnosis. Direct examination of stool samples and acid fast staining can also contribute to the diagnosis.
Step-by-step explanation:
The best way to diagnose necrotizing enterocolitis (NEC) involves several methods including imaging, endoscopy, lab tests, and other available data. Detection of the toxin in stool samples through molecular biology techniques (PCR) or immunology techniques (ELISA) is used to confirm the diagnosis. Additionally, direct examination of stool samples and acid fast staining can also be helpful.