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Clinical Diagnostics

Gastrointestinal Infection

Gastroenteritis (diarrheal disease) is an inflammation of the lining of the intestines caused by a virus, bacteria or parasites. Symptoms of gastroenteritis include diarrhea, abdominal pain, vomiting, headache, fever and chills. Diarrheal disease can be caused by a variety of different pathogens including viruses, bacteria, and parasites. Due to similar clinical signs and symptoms, diagnosis of the causative pathogens can be difficult. Viral gastroenteritis is most common and often caused a norovirus that spreads through contaminated food or water, and contact with an infected person. Most people recover with no treatment.

Bacterial gastroenteritis can result from infection after contact with animals or consuming food or water contaminated with bacteria. Numerous bacteria can cause gastroenteritis, including: yersinia (found in pork), Staphylococcus (dairy products, meat, and eggs), Shigella (swimming pools), Salmonella (meat, dairy products, and eggs), Campylobacter (meat and poultry), E. coli (ground beef and salads). Bacterial gastroenteritis outbreaks can happen when restaurants serve contaminated food. Bacterial gastroenteritis can be easily transmitted from person to person if someone carries the bacteria on their hands and touches food, objects, or other people. People with bacterial gastroenteritis have harmful bacteria in their stool. When they don't wash their hands well after using the bathroom, they can spread the germs to objects.

Available Tests
Gastrointestinal Infection Panel
Info Sheet  Requisition Form 
Test Information
Organism List: Bacteria and bacterial toxins: Campylobacter, Clostridium difficile, Toxin A/B, Escherichia coli O157, Enterotoxigenic E.coli (ETEC) LT/ST, Shiga-like Toxin producing E.coli (STEC) stx1/stx2, Salmonella, Shigella, Vibrio cholera, Yersinia enterocolitica

Viruses: Adenovirus 40/41, Norovirus GI/GII, Rotavirus A.

Parasites: Cryptosporidium, Entamoeba histolytica, Giardia
Clinical Utility: Retrogen offers early & accurate detection, rapid turnaround times, and only requires a single stool swab sample. Your referring physician will be provided with a detailed, comprehensive report that leads to actionable decisions and forward treatment options.
Method: The Luminex xTAG® GPP is a next generation, closed tube, multiplexed nucleic acid test intended for the simultaneous qualitative detection and identification of multiple viral, parasitic, and bacterial nucleic acids in human stool specimens from individuals with signs and symptoms of diarrheal disease or gastroenteritis.
Test ID: #7003
Turn-around Time: 24-48 hours
Preferred Specimen: Stool Specimen Swab, Rectal Swab
CPT Codes: 87505
Billing Information: View Billing Information
Web Resources
  1. https://www.niddk.nih.gov/health-information/digestive-diseases/viral-gastroenteritis
  2. https://medlineplus.gov/gastroenteritis.html
  3. https://www.healthline.com/health/bacterial-gastroenteritis#prevention
  4. https://www.health24.com/Medical/Digestive-health/Gastroenteritis-and-food-illness/how-can-gastroenteritis-be-prevented-20180212
  5. https://www.fairview.org/patient-education/89211