A 6-year-old patient presents with swelling of the lips and difficulty breathing immediately after receiving local anesthesia. what type of hypersensitivity reaction is this, what is the first-line treatment?

What type of immune response is responsible for serum sickness?

A patient develops a rash and pruritus 48 hours after wearing latex gloves. Which hypersensitivity type does this represent, and which test confirms the diagnosis?

A dentist uses a metal crown that results in localized inflammation and itching in a patient after 3 days. Histology shows mononuclear cell infiltrate. what is the likely mechanism?

A 23-years-old women presents with fatigue, pallor, and dark urine.

she recently completed a course of penicillin.

Lab results shows low hemoglobin, elevated LDH, and a positive direct Coombs test.

Which hypersensitivity mechanism is responsible for her condition?

Which type of hypersensitivity reaction is independent of antibody involvement?

A 28-year-old male patient with hematuria and shortness of breath.

Chest x-ray shows pulmonary infiltrates, and urine analysis reveals red blood casts.

A renal biopsy shows linear IgG deposition along the basement membrane.

What type of hypersensitivity reaction is involved?

which of  the following is released by mast cells after antigen binding?