HIV/AIDS Glossary

Viral Tropism

Synonym(s): Tropism

When HIV selectively attaches to a particular coreceptor on the surface of a host CD4 cell. HIV can attach to either the CCR5 coreceptor (R5-tropic) or the CXCR4 coreceptor (X4-tropic) or both (dual-tropic).

Related Term(s): Dual-Tropic Virus, R5-Tropic Virus, X4-Tropic Virus


(Click to enlarge)
Ways in which an HIV virion can attach to a CD4 cell

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