Category Archives: Immunology

CD4 + TH lymphocyte stimulation

A 44-year-old male with chronic cough and progressive weight loss is found to have septum cultures positive for acid-fast bacilli. A lung biopsy obtained from this patient reveals the histology shown below. The finding indicated on the slide most likely … Continue reading

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Anti-human Immunoglobulin

A 20-year-old Caucasian male with oral Thrush is tested for HIV ELISA. During the final step of the test, chromogen is added to the plate. The plate content changes its color and the patient is informed that test is positive. … Continue reading

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