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Infectious Colitis

Experiencing sudden diarrhea, abdominal pain, or fever? Infectious colitis-colon inflammation from bacteria, viruses, or parasites-can disrupt daily life. Dr. Scott at GastroDoxs in Houston uses advanced diagnostics and personalized treatments to restore your digestive health quickly, safely, effectively, and compassionately.

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Scott Liu

About the Expert

Dr. Scott Liu, MD, is a board-certified gastroenterologist with over six years of experience and a background in military medicine. He earned his medical degree from the University of Maryland, Baltimore, completed his Internal Medicine residency at Naval Medical Center Portsmouth, and finished his Gastroenterology fellowship through the National Capital Consortium. Dr. Liu provides comprehensive care for a broad range of digestive conditions, including abdominal pain, acid reflux, liver disease, chronic diarrhea, and colon cancer screening. He is a member of the American College of Gastroenterology and is known for his disciplined, patient-focused approach and clear communication.

What Is Infectious Colitis?

Infectious colitis is inflammation and swelling of the large intestine (colon) caused by an invading pathogen-bacteria, viruses, or parasites. It typically results in abdominal pain, diarrhea (sometimes bloody), fever, and general discomfort.

Common Causes and Risk Factors

  • Bacterial infections (Salmonella, E. coli, Shigella)
  • Viral infections (norovirus, adenovirus)
  • Parasitic infections (Giardia lamblia, Entamoeba histolytica)
  • Consumption of contaminated food or water
  • Recent travel, especially to high-risk regions
  • Weakened immune system (e.g., HIV, diabetes, immunosuppressive therapy)

Signs and Symptoms

  • Watery or bloody diarrhea
  • Abdominal cramps or pain
  • Nausea and vomiting
  • Fever and chills
  • Urgent need to use the bathroom
  • Unintended weight loss or dehydration

How Dr. Scott Diagnoses This Condition?

Dr. Scott uses a step-by-step approach:

Medical History and Physical Exam

He reviews your symptom onset, travel history, recent diet, and any underlying health issues.

Stool Tests

Samples are analyzed to identify bacteria, viruses, or parasites causing your colitis.

Blood Tests

We check white blood cell count, inflammatory markers, and hydration status.

Colonoscopy with Biopsy

If symptoms persist or are severe, direct visualization and tissue sampling confirm inflammation and rule out other diseases.

Imaging Studies

  • CT scan evaluates the extent of colon inflammation and detects complications such as abscesses.

Advanced Testing (if needed)

In rare cases, additional endoscopic or radiologic studies are used to refine diagnosis and guide treatment.

Dr. Scott
Treatment

Our Team offers a full range of care for infectious colitis.

1. Lifestyle and Diet Modifications

  • Drink plenty of fluids (water, broth, electrolyte solutions)
  • Start with the BRAT diet (bananas, rice, applesauce, toast)
  • Avoid spicy foods, dairy, caffeine, and alcohol
  • Reintroduce fiber-rich foods gradually as you recover
  • Practice thorough handwashing to prevent spread

2. Medications

  • Oral rehydration solutions to restore fluids and salts
  • Antibiotics when a bacterial cause is confirmed
  • Antiparasitic agents for parasite‐driven colitis
  • Antidiarrheal medications under Dr. Scott's guidance

3. Minimally Invasive or Advanced Care

  • Colonoscopy with biopsy to monitor healing
  • Hospital admission for IV fluids and close monitoring in severe cases
  • Team-based surgical consultation if procedural intervention is needed
Scott Liu

About the Expert

Dr. Scott Liu, MD, is a board-certified gastroenterologist with over six years of experience and a background in military medicine. He earned his medical degree from the University of Maryland, Baltimore, completed his Internal Medicine residency at Naval Medical Center Portsmouth, and finished his Gastroenterology fellowship through the National Capital Consortium. Dr. Liu provides comprehensive care for a broad range of digestive conditions, including abdominal pain, acid reflux, liver disease, chronic diarrhea, and colon cancer screening. He is a member of the American College of Gastroenterology and is known for his disciplined, patient-focused approach and clear communication.

Frequently Asked Questions

How long does infectious colitis last?

Mild cases often improve in 3-7 days with proper hydration and rest. More severe infections may take 2-3 weeks to fully resolve, depending on the pathogen and treatment response.

Is infectious colitis contagious?

Yes. Many of the bacteria, viruses, and parasites that cause colitis can spread from person to person. Rigorous hand-washing and proper food safety help prevent transmission.

What is the ICD-10 code for infectious colitis?

The most common codes are A04.9 for bacterial colitis and K52.9 for unspecified noninfective colitis. Dr. Scott uses the correct code to guide treatment and billing.

How is infectious colitis treated?

Treatment includes rest, fluid and electrolyte replacement, dietary adjustments (BRAT diet), and-when indicated-antibiotics or antiparasitic medications under Dr. Scott's guidance.

When should I see Dr. Scott for colitis?

Schedule an appointment if diarrhea lasts more than 2 days, you notice blood in your stool, you have a high fever, or you show signs of dehydration (dizziness, reduced urine output).

Can I go back to work after having colitis?

Yes. You can usually return to work once you've been symptom-free (no diarrhea, vomiting, or fever) for at least 24 hours and are well-hydrated.

How do I avoid infectious colitis in Houston summers?

Avoid undercooked or street-vendor foods, drink bottled or properly treated water, and wash your hands thoroughly after using public facilities or before eating.

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