Ancylostoma duodenale and Necator americanus

A 20-year-old man comes to the physician for evaluation of severe itchiness in the right foot. The patient returned a week ago from a trip to Italy, during which he consumed raw seafood and walked barefoot on the beach. Temperature is 37.7°C (99.9°F), blood pressure is 115/73 mmHg, and pulse is 82/min. Physical examination reveals a serpiginous, pruritic rash at the lateral aspect of the right foot. Cardiac, pulmonary, and abdominal examinations are unremarkable. Which of the following is the most likely cause of this patient’s condition?