Overview
Chronic intestinal isosporiasis is a parasitic infection characterized by persistent diarrhea, abdominal pain, and malabsorption, primarily affecting immunocompromised individuals 1.Diagnosis
Recurrent episodes of gastrointestinal symptoms without mechanical obstruction 1.
Exclusion of other causes including Hirschsprung's disease 1.
Full-thickness biopsy of the digestive tract may show characteristic histopathological features 1.
Associated with immunocompromised states or immunodeficiency 1.Management
Antiparasitic therapy with trimethoprim-sulfamethoxazole (TMP-SMX) as first-line treatment, typically at doses of 8 mg/kg/day of trimethoprim component twice daily 1.
Adjunctive management includes supportive care focusing on hydration and nutritional support 1.Special Populations
Pediatrics: Early onset can occur, with significant morbidity noted in infants and young children, often presenting with abdominal distension, vomiting, and constipation 1.
Immunocompromised: Increased susceptibility and severity of symptoms due to impaired immune response 1.Key Recommendations
Initiate empirical antiparasitic therapy with TMP-SMX in immunocompromised patients presenting with chronic gastrointestinal symptoms suggestive of isosporiasis (Evidence: Moderate 1).
Perform full-thickness biopsy of the digestive tract when clinical suspicion is high and other causes are excluded to confirm diagnosis (Evidence: Moderate 1).
Provide comprehensive supportive care including hydration and nutritional support alongside antiparasitic treatment (Evidence: Expert opinion 1).References
1 Faure C, Goulet O, Ategbo S, Breton A, Tounian P, Ginies JL et al.. Chronic intestinal pseudoobstruction syndrome: clinical analysis, outcome, and prognosis in 105 children. French-Speaking Group of Pediatric Gastroenterology. Digestive diseases and sciences 1999. link