See Genetic Engineering. Referring to a disease that does not readily respond to treatment. T cells that direct other immune cells to perform special functions. Pertaining to the kidneys. Reduction in a pathogen's sensitivity to a particular drug.
Resistance is thought to result usually from a genetic mutation .
In HIV, such mutations can change the structure of viral enzymes and proteins so that an antiviral drug can no longer bind with them as well as it used to. A system of interstitial cells that includes all the phagocytic cells, which trap and consume foreign agents, except the leukocytes circulating in the bloodstream. This system forms a network throughout the body and is another of the body's defense systems against invading organisms in the connective tissues of the body. Light-sensitive tissue at the back of the eye that transmits visual impulses via the optic nerve to the brain. Condition in which a portion of the retina becomes separated from the inner wall of the eye.