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Subject: o
Date: Thu, 12 Oct 95 23:34 PDT (41 lines of text)

OCULAR:

Pertaining to the eye.

OPEN-LABEL TRIAL:

A clinical trial in which doctors and participants know which drug or vaccine is being administered. See also Clinical Trial.

OPPORTUNISTIC INFECTION:

1. An illness caused by an organism that usually does not cause disease in a person with a normal immune system. People with advanced HIV infection suffer opportunistic infections of the lungs, brain, eyes and other organs. 2. Opportunistic infections common in AIDS patients include Pneumocystis carinii pneumonia, Kaposi's sarcoma, shigellosis, histoplasmosis and other parasitic, viral, and fungal infections, and some types of cancers. See also Histoplasmosis; Kaposi's Sarcoma; Pneumocystis carinii Pneumonia.

OROPHARYNGEAL:

Relating to that division of the pharynx between the soft palate and the epiglottis. Pharynx is a tube that connects the mouth and nasal passages with the esophagus, the connection to the stomach. Epiglottis is a thin, valvelike structure that covers the glottis, the opening of the upper part of the larynx (the part of the throat containing the vocal cords), during swallowing.

OVARY:

Part of the female reproductive system. One of a pair of female gonads (a gamete-producing gland) found on each side of the lower abdomen, beside the uterus, in a fold of the broad ligament. At ovulation, an egg is extruded from a follicle on the surface of the ovary under the stimulation of certain hormones.