10. Following a rattlesnake bite, a patient is injected with horse anti-rattlesnake venom serum. Ten days later, he has general weakness, headaches, muscular and joint pains, and dark urine. Laboratory studies show proteinuria. Serum concentrations of immunoglobulins are within the reference range, but serum C3 and C4 concentrations are decreased. Which of the following is the most likely pathologic process? A) Anaphylactic reaction ( Dy Delayed hypersensitivity to horse proteins (V Formation of antigen-antibody complexes containing horse proteins and/human immunoglobulins Formation of antigen-antibody complexes containing snake venom proteins and horse antibody Systemic reaction to snake venom Senum Sichness. Type 111 hypersensitiving

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