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Comparison of receiver-operator characteristic (ROC) curves for all four serologic methods based on results from a selected group of sera from patients with parasitologically proven S. stercoralis infection (n = 101) and healthy North American subjects without a history of travel to an area of endemicity (n = 10). The area under the curve (AUC) for each technique was as follows: CrAg-ELISA, 0.986; NIE-ELISA, 0.922; NIE-LIPS, 0.933; and NIE-SsIR-LIPS, 0.977.
