A03.0 Shigellosis due to Shigella dysenteriae

Name of the Condition

• Shigellosis due to Shigella dysenteriae

Summary

Shigellosis due to Shigella dysenteriae is an acute bacterial infection of the intestine caused by this specific Shigella species. The condition is characterized by gastrointestinal symptoms, including diarrhea (often bloody), abdominal cramps, and fever. It is highly contagious and spreads through the fecal-oral route, typically via contaminated food, water, or direct person-to-person contact.

Causes

Shigellosis due to Shigella dysenteriae is caused by infection with Shigella dysenteriae bacteria, which are transmitted through ingestion of contaminated materials. The bacteria invade the intestinal lining, leading to inflammation and the characteristic symptoms of the illness.

Risk Factors

• Close contact with infected individuals (e.g., in households, childcare settings, or crowded environments).
• Consumption of food or water contaminated with Shigella dysenteriae.
• Poor hand hygiene practices, especially after using the restroom or changing diapers.
• Travel to areas with inadequate sanitation or hygiene infrastructure.
• Weakened immune systems, which may increase susceptibility to severe infection.

Symptoms

• Diarrhea (often bloody or mucoid)
• Abdominal pain and cramping
• Fever
• Nausea and vomiting
• Tenesmus (painful, incomplete bowel movements)
• Dehydration (in severe cases)

Diagnosis

Diagnosis is confirmed through laboratory testing of stool samples to detect Shigella dysenteriae bacteria. Stool culture or molecular testing may be used to identify the specific species and guide treatment.

Treatment Options

• Rehydration: Oral rehydration salts (ORS) to replace lost fluids and electrolytes are crucial.
• Intravenous Fluids: In severe cases, intravenous fluids may be required to correct dehydration and electrolyte imbalances.
• Antibiotics: Antibiotics such as ciprofloxacin or azithromycin may be prescribed, depending on susceptibility and clinical severity.

Prognosis and Follow-Up

Most individuals recover fully within a week with appropriate treatment. Follow-up may involve monitoring for dehydration and ensuring symptoms resolve. Severe cases or complications may require extended care.

Complications

• Severe dehydration
• Hemolytic uremic syndrome (rare)
• Rectal prolapse
• Toxic megacolon
• Septicemia (in immunocompromised individuals)

Lifestyle & Prevention

• Practice good hand hygiene, especially after using the restroom or handling food.
• Avoid consuming untreated water or food from unhygienic sources.
• Ensure proper sanitation in food preparation and storage.
• Stay home from work or school until symptoms resolve to prevent spread.

When to Seek Professional Help

Seek medical attention if you experience:

• Bloody diarrhea
• High fever
• Signs of dehydration (e.g., dizziness, reduced urination)
• Severe abdominal pain
• Symptoms lasting more than 3 days without improvement

Tips for Medical Coders

Use code A03.0 for shigellosis specifically due to Shigella dysenteriae. Document the causative organism when available to support code assignment. Ensure clinical correlation with symptoms and diagnostic testing for accurate coding.