A03.2 Shigellosis due to Shigella boydii

Name of the Condition

• Shigellosis due to Shigella boydii

Summary

Shigellosis due to Shigella boydii 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 boydii is caused by infection with Shigella boydii 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 boydii.
• 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 boydii bacteria. Stool cultures or molecular assays may be used to identify the specific species. Clinical evaluation, including symptom assessment and exposure history, supports the diagnosis.

Treatment Options

Treatment focuses on managing symptoms and preventing dehydration. Antibiotics may be prescribed for severe cases or high-risk individuals, though resistance patterns vary. Oral rehydration solutions are recommended for fluid replacement. Antidiarrheal medications are generally avoided as they may prolong infection.

Prognosis and Follow-Up

Most cases resolve within a week with proper hydration and supportive care. Follow-up may be needed for severe infections or complications. Antibiotic treatment can shorten the duration of symptoms and reduce transmission risk when appropriate.

Complications

• Dehydration (especially in young children or older adults)
• Hemolytic uremic syndrome (rare but serious)
• Rectal prolapse
• Reactive arthritis
• Seizures (in young children)

Lifestyle & Prevention

• Practice thorough handwashing with soap and water, especially after using the restroom or changing diapers.
• 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.
• Avoid sharing personal items like towels or utensils with infected individuals.

When to Seek Professional Help

Seek medical attention if symptoms worsen, include high fever, bloody diarrhea, signs of dehydration (e.g., dizziness, reduced urination), or if the infection persists beyond a few days. Prompt care is critical for severe cases or vulnerable populations (e.g., infants, elderly, immunocompromised).

Tips for Medical Coders

Code A03.2 is specific to shigellosis caused by Shigella boydii. Documentation should specify the causative organism to support accurate coding. Ensure clinical notes align with the diagnosis and include details on symptoms, testing, or treatment when available.