Highrisk behavior 221

heterosexuality Sexual orientation toward persons of the opposite sex.

HHV-1, HHV-2 See herpes simplex virus.

HHV-3 See varicella-zoster virus.

HHV-4 See epstein-barr virus.

HHV-5 See cytomegalovirus.

HHV-6 See human herpesvirus 6.

HHV-7 See human herpesvirus 7.

HHV-8 (KSHV, Kaposi's sarcoma [KS] herpes-virus) A herpesvirus thought to trigger the development of Kaposi's sarcoma lesions. HHV-8's mode of transmission has not been determined. See KAPOSI'S SARCOMA.

Hickman catheter people who require long courses of drugs that must be regularly and slowly introduced into the body and cannot be taken orally will often have a flexible tube called a Hick-man catheter, through which drugs can be injected, surgically inserted into a large vein in the chest and left in place for a long period of time. See


high risk In the context of AIDS, a term applied to patterns of behavior that place individuals at risk of contracting the HIV virus; any behavior that puts the bloodstream in contact with any of the bodily fluids of another person that can transmit the AIDS virus. High-risk behavior includes sharing needles when injecting intravenous drugs and having unprotected vaginal, anal, or oral sex or sex with an iv drug user. The mode of transmission may influence the likelihood that an exposed individual will become infected. There appears to be a continuum of risk for HIV/AIDS. The risk of HIV infection has been categorized as no risk, low risk, medium risk, and high risk.

high-density lipoprotein A lipoprotein that contains more protein than fat; often called "good cholesterol."

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