Determining if it's rotavirus or another stomach issue may not be vital. Tests like PCR, fecal cultures, and microscopic parasite evaluations commonly diagnose GI infections. If symptoms persist or worsen, or if hospitalization is required, these tests, along with X-rays or advanced imaging, may be necessary to rule out non-infectious causes like GI obstruction.Determining if it's rotavirus or another stomach issue may not be vital. Tests like PCR, fecal cultures, and microscopic parasite evaluations commonly diagnose GI infections. If symptoms persist or worsen, or if hospitalization is required, these tests, along with X-rays or advanced imaging, may be necessary to rule out non-infectious causes like GI obstruction.