B78.7 Disseminated strongyloidiasis

Name of the Condition

• Disseminated strongyloidiasis

Summary

Disseminated strongyloidiasis is a severe parasitic infection caused by the nematode Strongyloides stercoralis, characterized by widespread larval migration and systemic involvement. The condition occurs when the parasite spreads beyond the gastrointestinal tract, affecting multiple organs and tissues, often in immunocompromised individuals.

Causes

The condition is caused by infection with the Strongyloides stercoralis parasite. Larvae enter the body through skin contact with contaminated soil, and in immunocompromised hosts, the infection can progress to disseminated disease as larvae migrate internally and multiply.

Risk Factors

• Residing in or traveling to tropical and subtropical regions.
• Walking barefoot on contaminated soil.
• Immunocompromised state, such as due to HIV/AIDS, long-term corticosteroid use, or organ transplantation.

Symptoms

• Severe abdominal pain and diarrhea
• Respiratory symptoms, including cough and dyspnea
• Skin manifestations, such as rash or urticaria
• Systemic signs of infection, including fever and malaise
• Neurological symptoms in advanced cases

Diagnosis

Diagnosis involves identifying the parasite through stool samples, sputum, or tissue biopsies. Microscopic examination may detect larvae, while serological tests can confirm exposure. Molecular tests (PCR) may be used for more accurate detection in difficult cases, especially when larvae are not readily visible.

Treatment Options

• Ivermectin is the primary treatment, effectively eradicating the parasite.
• Albendazole may be used as an alternative in some cases.
• Supportive care, including management of respiratory or gastrointestinal symptoms, may be necessary.

Prognosis and Follow-Up

With appropriate treatment, the prognosis depends on the extent of organ involvement and the patient’s immune status. Follow-up may include monitoring for recurrence or complications, particularly in immunocompromised individuals.

Complications

• Severe respiratory distress
• Gastrointestinal perforation or bleeding
• Neurological damage
• Sepsis or multi-organ failure in advanced cases

Lifestyle & Prevention

• Avoid walking barefoot in endemic areas.
• Practice good hygiene, including handwashing after soil contact.
• Seek prompt medical evaluation if exposure to contaminated soil is suspected.

When to Seek Professional Help

Seek immediate medical attention if symptoms of severe infection develop, such as high fever, difficulty breathing, or signs of systemic illness, especially in immunocompromised individuals.

Tips for Medical Coders

Document the extent of dissemination (e.g., organ involvement) and any underlying immunocompromised status, as these details support accurate coding. Ensure clinical documentation aligns with the specific manifestations of disseminated disease to justify the B78.7 code.