INTC 2P97 Study Guide - Midterm Guide: Etiology, Neglected Tropical Diseases, Helminths
18 Jan 2017
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Can be hiv+ but not have aids acquired (external) immunodeficiency (primary or secondary) syndrome. Hiv- means the person could be positive but the virus hasn"t been found yet. Syndrome: a collection of symptoms and signs of the disease, complex illness with a wide range of complications. Life-threatening opportunistic condition that occurs when cd4 counts are below 200 cells/mm3: healthy person = 500 cells/mm3 (cluster of cells in the blood, cd: cluster of differentiation. Opportunistic infections are the most common cause of death for hiv/aids patients: e. g. Retrovirus: reversal of genetic transcription i. e. from rna dna rather than from dna . Rna so that the newly viral dna can be incorporated into the host cell"s dna to produce new rna retroviruses. Subtypes include type b common in the americas, australia, uk: some subtypes can be better transmitted through heterosexual activities while others through homosexual due to the nature of the virus.
