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Colonoscopy, virtual colonoscopy or flexible sigmoidoscopy involves inspecting the inside of your large intestine with a tool known as a colonoscope to assess digestive conditions such as colon cancer.
This procedure should not be undertaken lightly as it’s essential in diagnosing digestive conditions like this one.
At your examination, your gastroenterologist may remove polyps or perform a biopsy to detect colon cancer. Results from tissue samples could take days or weeks.
Symptoms of Bacterial Infection After Colonoscopy
Symptoms of bacterial infection after colonoscopy can include the following:
– Abdominal pain
– Abdominal tenderness
– Chills
– Constipation
– Diarrhea
– Fever
– Nausea
– Vomiting
If you experience any of these symptoms after a colonoscopy, it is important to report them to your healthcare provider. They may indicate an infection. A study conducted by Johns Hopkins suggests that infection rates following colonoscopies and endoscopies could be up to 100 times higher than previously believed.
Bacterial infections, such as E.coli and Klebsiella, are reported in approximately 1 out of every 1000 people after screening colonoscopies, 1.6 out of every 1000 people after nonscreening colonoscopies, and 3 out of every 1000 people after esophagogastroduodenoscopies (EGDs) or upper-GI endoscopes.
In the case of post-polypectomy fever occurring within hours to five days after the procedure, individuals may develop fever along with other symptoms like leukocytosis, localized abdominal pain, and tenderness. It’s worth noting that bacterial infections can be easily treated with antibiotic therapy.

Diarrhea
At a colonoscopy, doctors use a flexible tube equipped with a camera and light to look inside of the large intestine. Prior to beginning, your bowel must first be empty before doctors use this process to detect polyps or take samples of abnormal tissue from inside your large intestine. The procedure typically isn’t painful and you should return to eating normally soon afterwards.
After having undergone a colonoscopy, you may notice blood in your stool for the first time afterward. Although this is normal and should not cause alarm, heavy bleeding could indicate tears or perforations in the colon wall and should be addressed immediately by seeing your physician.
As with any medical procedure, colonoscopie can sometimes result in diarrhea due to bacteria already present in your intestines becoming infected with each other and invading other parts of the body.
While such infections are uncommon, if symptoms such as fever, pain during defecation (tenesmus) or persistent diarrhea do occur after several days they should contact their healthcare provider immediately as it could indicate infection with bacteria that causes mucus in stool as well as abdominal pain may indicate bacterial contamination.
Abdominal Pain
Abdominal pain after undergoing a colonoscopy or EGD procedure is normal and likely the result of air being pumped into your colon during the procedure to help the doctor better visualize inside. Frequent passing of gas and walking around may help ease any discomfort you might be experiencing.
Dysentery, or bacterial infection of the large intestine, can be the source of abdominal pain and fever. Common culprits include Campylobacter, Shigella Salmonella Yersinia Escherichia coli as well as Escherichia coli.
Small intestine infections can occur more rarely and more seriously; sepsis is the most serious infection to emerge after having a colonoscopy performed.
After having your colonoscopy, you may notice some blood in your rectum or stool after. This occurs when a doctor uses the colonoscope to take tissue samples or remove polyps. Sometimes an accidental cut can nick through lining and cause bleeding which lingers after the procedure has concluded.
Fever
Fever after colonoscopy isn’t typical and could signal the presence of an infection from bacteria or sepsis. Fever and chills could also signal other serious conditions that require hospitalization, like renal disease and tuberculosis.
John Hopkins researchers conducted a recent study which concluded that infections following colonoscopies and endoscopies are far more prevalent than previously anticipated. By reviewing medical data from 2014 and 2015, they discovered that patients undergoing these two popular recommended procedures at facilities known as ambulatory surgery centers had much higher risks of contracting bacterial infections than expected.
Patients experiencing bloating or abdominal discomfort after their procedure should understand this is due to air introduced during colonoscopy, which will dissipate as it leaves your system. If it persists, try passing gas or taking walks; otherwise you should also report this concern immediately to your physician.
Aside from air entering the colon, other sources could include hemorrhaging from anesthetic injection. If that’s the case for you too, be wary if blood appears with first bowel movement after test – something not expected and should also be reported immediately to medical professional concerned.

How Soon After a Colonoscopy Can Symptoms of Infection Appear
Symptoms of bacterial infection can manifest within a period of 7 to 30 days after undergoing a colonoscopy. These symptoms commonly involve fever, abdominal pain, tenderness, chills, constipation, diarrhea, nausea, and vomiting.
In the case of post-polypectomy fever following a colonoscopic polypectomy procedure, symptoms including leukocytosis (increased white blood cell count), localized abdominal pain, and tenderness may emerge within hours to 5 days after the procedure.
Although rare, severe pain after colonoscopy may indicate acute cholecystitis when accompanied by fever and abnormal liver enzyme levels. If any of these symptoms arise subsequent to a colonoscopy experience, promptly reporting them to your healthcare provider is essential as they could potentially signify an infection.
What Are the Most Common Types of Bacterial Infections After a Colonoscopy
These bacteria can cause various symptoms, including fever, abdominal pain, tenderness, chills, constipation, diarrhea, nausea, and vomiting. It’s worth noting that bacterial infections after undergoing a colonoscopy are relatively uncommon but still possible.
If you happen to experience any signs of infection following the procedure, it’s crucial to promptly reach out to your healthcare provider for evaluation and appropriate treatment.
What Is the Treatment for Bacterial Infections After a Colonoscopy

Bacterial infections that occur after a colonoscopy are typically treated using antibiotic therapy.
The specific type of antibiotic prescribed is determined by the particular bacteria responsible for the infection. It’s crucial to follow your healthcare provider’s instructions and complete the entire course of antibiotics, even if you begin feeling better beforehand.
Alongside antibiotics, additional treatments may be necessary to manage symptoms like fever, abdominal pain, and diarrhea.
If you notice any signs of infection following a colonoscopy, it’s essential to promptly reach out to your healthcare provider for evaluation and appropriate treatment.