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Ascaris Lumbricoides (Diagnosis)

eMedicine Emergency Medicine, 2011

Considered Hepatic abscess Tropical pulmonary eosinophilia Visceral larva migrans Workup Laboratory Studies Early infection (larval migration) Complete blood count (CBC) may show eosinophilia.
Adult females lay about 200,000 eggs per day, aiding microscopic identification of characteristic eggs.
Imaging Studies Early infection (larval migration): Chest radiography may reveal patchy infiltrates of eosinophilic pneumonia.
Established infection (adult phase) Abdominal radiography may reveal adult worms (especially with contrast).
Obstructing Ascaris lesions cause cylindrical filling defects on contrast computed tomography (CT) scans.
Cholangiopancreatography by endoscopy (ERCP) or magnetic resonance imaging (MRCP, or magnetic resonance cholangiopancreatography) may detect adult worms in bile or pancreatic ducts.
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