B81.2 Trichostrongyliasis

Name of the Condition

• Trichostrongyliasis

Summary

Trichostrongyliasis is an intestinal infection caused by parasitic nematodes of the genus Trichostrongylus. These worms primarily affect the gastrointestinal tract, leading to inflammation and symptoms that can range from mild discomfort to significant gastrointestinal distress. The condition occurs after ingesting larvae from contaminated sources, with clinical presentation varying based on parasite load and host factors.

Causes

The infection is caused by ingesting Trichostrongylus larvae, typically through contaminated food or water. Common sources include raw or undercooked vegetables, fruits, or other foods exposed to soil containing parasite larvae. The larvae mature in the intestinal mucosa, where they attach and feed, causing tissue damage and inflammation. Transmission is often linked to poor sanitation or agricultural practices in endemic regions.

Risk Factors

• Consumption of raw or undercooked vegetables or fruits.
• Exposure to soil or water contaminated with Trichostrongylus larvae.
• Poor sanitation and hygiene practices in endemic areas.
• Travel to regions with high prevalence of intestinal parasites.
• Weakened immune system, which may increase susceptibility to infection.

Symptoms

• Abdominal pain or cramping.
• Diarrhea, which may be chronic or intermittent.
• Nausea and vomiting.
• Weight loss or malnutrition.
• Fatigue or weakness.
• Eosinophilia (elevated eosinophil count in blood).

Diagnosis

Diagnosis is based on clinical presentation, history of potential exposure (e.g., consumption of raw produce or travel to endemic areas), and laboratory findings. Stool samples may be examined for parasite eggs or larvae, and blood tests may show elevated eosinophil counts. Endoscopic evaluation or imaging may be used to assess intestinal inflammation or damage in severe cases.

Treatment Options

Treatment typically involves anthelmintic medications, such as albendazole or mebendazole, to eliminate the parasites. Supportive care, including hydration and nutritional support, may be necessary for patients with severe symptoms or malnutrition. Follow-up testing may be recommended to confirm parasite clearance.

Prognosis and Follow-Up

With appropriate treatment, most patients recover fully without long-term complications. Follow-up may include repeat stool examinations to ensure parasite clearance, especially in cases with heavy infestations. Patients with persistent symptoms or complications may require additional evaluation and management.

Complications

Severe or prolonged infections can lead to complications such as chronic diarrhea, malnutrition, or intestinal obstruction. In rare cases, significant blood loss or anemia may occur due to intestinal damage. Immunocompromised individuals may experience more severe or prolonged symptoms.

Lifestyle & Prevention

• Practice good hygiene, including thorough handwashing after handling soil or raw produce.
• Wash fruits and vegetables thoroughly before consumption.
• Cook food properly, especially meat and seafood.
• Avoid consuming raw or undercooked vegetables in endemic areas.
• Improve sanitation in agricultural and living environments to reduce parasite exposure.

When to Seek Professional Help

Seek medical attention if you experience persistent abdominal pain, diarrhea, or unexplained weight loss, especially after potential exposure to contaminated sources. Prompt evaluation is important for severe symptoms, such as high fever, dehydration, or signs of intestinal obstruction.

Tips for Medical Coders

When coding for trichostrongyliasis, use ICD-10-CM code B81.2. Ensure documentation supports the diagnosis, including clinical findings, exposure history, and any diagnostic test results. Verify that the code is appropriately assigned based on the specific parasitic infection identified and documented in the medical record.