A 35-year-old construction worker presents with a 3-month history of abdominal pain, fatigue, and recent onset of numbness and tingling in his hands and feet. He works in renovation of old buildings. Physical examination reveals mild pallor and decreased sensation in a stocking-glove distribution. Blood tests show microcytic anemia with basophilic stippling on peripheral smear. What is the most likely diagnosis?
ACoeliac disease
BSickle cell disease
CLead poisoning
DHookworm infestation
Acrodynia, or Pink disease, occurs in poisoning with which of the following substances?
ALead
BThallium
CArsenic
DMercury
Which of the following is the most common late toxic manifestation of diphtheria in a child?
APolyneuritis
BRenal failure
CMyocarditis
DSepticemia
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