--- title: IBS Diagnosis date: 2021-01-29T14:54:00-08:00 author: admin canonical_url: "https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/ibs-diagnosis" section: Resource Library --- [Foodborne Illnesses](/foodborne-illnesses) / [Irritable Bowel Syndrome](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome) / # IBS Diagnosis ### How is IBS diagnosed? Clinicians diagnose IBS by identifying typical symptoms, taking a thorough history, and doing a complete physical examination. Blood and stool tests are often part of the initial evaluation, including blood counts, measuring markers of inflammation in blood and/or stool, and testing for celiac disease in those with diarrhea. Further evaluation is indicated when there are alarm symptoms that indicate organic disease. These include blood in the stools, unexplained weight loss, diarrhea at night, or progressive abdominal pain. A family history of colon cancer or inflammatory bowel disease, onset after age 50, and abnormal laboratory tests also merit further evaluation. In some patients, colonoscopy may be indicated, particularly for anyone 50 or older, or those with a family history of colon cancer or inflammatory bowel disease. ![](https://s3.us-west-2.amazonaws.com/aboutirritablebowelsyndromecom-images/outbreaks/image11_2021-03-03-195852.jpeg) [ Next: IBS Treatment › ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/ibs-treatment) ### More Information [August 23, 2023 ###### Listeria outbreak: Three die after drinking contaminated milkshakes Three people have died, and three others are in hospital after drinking milkshakes contaminated with listeria bacteria in the US state of Washington, health officials say. Marler Clark, the Listeria ... ](https://marlerclark.com/news_events/listeria-outbreak-three-die-after-drinking-contaminated-milkshakes) [July 12, 2023 ###### 2011 Listeria outbreaks linked to cantaloupes: A history A total of 148 persons infected with any of the five outbreak-associated strains of Listeria monocytogenes were reported to the CDC from 28 states. The number of infected persons identified ... ](https://marlerclark.com/news_events/2011-listeria-outbreak-linked-to-cantaloupes-a-history) [May 20, 2023 ###### A quick look at the 2018 Hepatitis A outbreak Litigation proceeded in a Virginia state court against Tropical Smoothie and the strawberry supply chain. 134 people with Hepatitis A were reported from nine states, including: Arkansas (1), California (1) ... ](https://marlerclark.com/news_events/a-quick-look-at-the-2018-hepatitis-a-outbreak) [March 26, 2023 ###### Listeria linked to yogurt prompts recall Clio Snacks of Piscataway, New Jersey, is voluntarily recalling 581 cases of its Strawberry Granola & Greek Yogurt Parfait Bar due to potential contamination with Listeria monocytogenes, an organism which ... ](https://marlerclark.com/news_events/listeria-linked-to-yogurt-prompts-recall) [1. View all ](/news_events/outbreaks?illness=e-coli&year=all) ## All Irritable Bowel Syndrome Resources [###### What is Irritable Bowel Syndrome? ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/what-is-irritable-bowel-syndrome) [###### Causes of IBS ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/causes-of-ibs) [###### Post-Infectious IBS ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/post-infectious-ibs) [###### Dyspepsia and Gastroparesis ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/dyspepsia-gastroparesis) [###### IBS Diagnosis ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/ibs-diagnosis) [###### IBS Treatment ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/ibs-treatment) [###### Irritable Bowel Syndrome References ](https://marlerclark.com/foodborne-illnesses/irritable-bowel-syndrome/irritable-bowel-syndrome-references) ### Other foodborne illnesses [E. coli](https://marlerclark.com/foodborne-illnesses/e-coli) [Salmonella](https://marlerclark.com/foodborne-illnesses/salmonella) [Listeria](https://marlerclark.com/foodborne-illnesses/listeria) [Hepatitis A](https://marlerclark.com/foodborne-illnesses/hepatitis-a) [Reactive Arthritis](https://marlerclark.com/foodborne-illnesses/reactive-arthritis) [Guillain-Barre Syndrome](https://marlerclark.com/foodborne-illnesses/guillain-barre-syndrome) [Norovirus](https://marlerclark.com/foodborne-illnesses/norovirus) [Botulism](https://marlerclark.com/foodborne-illnesses/botulism) [Campylobacter](https://marlerclark.com/foodborne-illnesses/campylobacter) [Shigella](https://marlerclark.com/foodborne-illnesses/shigella) [Cyclospora](https://marlerclark.com/foodborne-illnesses/cyclospora) [Hemolytic Uremic Syndrome](https://marlerclark.com/foodborne-illnesses/hemolytic-uremic-syndrome)