An infection that is caused by bartonella bacilliformis, which is transmitted to humans from infected sandflies. the acute phase (oroya fever) is characterized by fever, headache, myalgia, enlargement of the lymph nodes, and anemia. the chronic phase (verruga peruana/peruvian wart) is characterized by benign, eruptive lesions that are bleeding and pruritic, arthralgia, and malaise.