BIOL 2900 Midterm: exam HIV and Influenza ch
7 Jan 2019
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Document Summary
Acquired immunodeficiency diseases affect individuals who had a previously healthy immune system. T cell production decreases with increasing age cell mediated immunity less effective in older individuals than in younger ones. Stress: can lead to immunodeficiency increase corticosteroid production toxic to t cells. Cold sores can escape immune control due to this stress. Most significant example is acquired immunodeficiency syndrome (aids) Presence of several opportunistic or rare infections along with infections by hiv. It is a syndrome: disease of skin shingles, widespread herpes, disease of nervous system meningitis, respiratory disease tb, gi system chronic diarrhea, thrush, oral hairy leukoplakia. Only a problem to those who have a damaged immune system. Decrease in the number of helper t cells (<200/microlitre; normal range is 500-1500) Only human cells can replicate hiv effectively. Initially, there is a burst of virion production and release from infected cells.
