| aneurysm | Saclike bulge in an artery. 162
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| antibodies (immunoglobulins) | Y-shaped protein molecules produced by B lymphocytes to destroy or inactivate specific antigens. 138, 175
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| antigen | Any substance that stimulates an immune response. 137, 173
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| asymptomatic | Having no symptoms. 137
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| asymptomatic carrier | A person who harbors a pathogen without experiencing symptoms. 137
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| Candida albicans | A yeast that causes common vaginal infections. 100
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| Candidiasis (yeast infection) | Infection by Candida albicans. 100, 163
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| chancre | A lesion that appears at the exact spot where infection with syphilis took place. 160
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| Chlamydia tracomatis | The bacterium that causes genital chlamydia infections. 156
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| communicable diseases | Diseases that can be transmitted from person to person (also called infectious diseases). 136
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| communicable period | When a disease is transmissible from person to person. 137
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| congenital | Present at birth. 162
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| contagious | Capable of being transmitted readily from one person to another. 137
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| denial | Keeping anxiety-producing realities out of one's conscious awareness. 166
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| depression | A feeling of sadness and apathy. 166
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| gonorrhea | Infection with Neisseria gonorrhoeae. 157
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| immunity | An array of highly specific bodily defenses against pathogens. 137
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| incubation period | Interval between infection and appearance of disease symptoms. 137
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| latent | Dormant, not evident. 162
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| lesion | An area of damaged tissue; a wound or infection. 149, 257
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| lymphocytes | White blood cells involved in producing immunity. 138, 174
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| Neisseria gonorrhoeae | The bacterium that causes gonorrhea. 157
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| nits | Lice eggs. 165
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| NSU or NGU | Urethritis of an unknown cause.(Nonspecific urethritis; nongonococcal urethritis.) 160
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| paresis | A term denoting all of the mental and physical effects of syphilitic degeneration of the nervous system. 162
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| pathogens | Disease-causing agents, commonly called "germs." 136
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| pelvic inflammatory disease (PID) | Extensive bacterial infection of the female pelvic organs, particularly the uterus, cervix, fallopian tubes, and ovaries. 156
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| pubic lice | Small, gray insects that live as external parasites on the body, especially in the pubic hair. 165
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| scabies | Infection of the skin by tiny burrowing mites. 165
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| sexually transmitted infections (STIs) | Infections that can be transmitted by sexual contact; other methods of transmission are sometimes possible. 136
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| spirochete | A spiral bacterium. 160
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| syphilis | Infection of the body by the spirochete Treponema pallidum. 160
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| systemic | Pertaining to the whole body. 160
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| trachoma | A chronic eye infection caused by the bacterium Chlamydia trachomatis. 156
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| transmission | The transfer of a pathogen from one person to another. 137
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| Treponema pallidum | the spirochete that causes syphilis. 160
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| Trichomonas vaginalis | A protozoan that causes vaginal infection. 164
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| urethritis | Inflammation of the urethra. 158
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| vaccine | A preparation composed of one or more antigens used to stimulate the development of immunity. 138
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| vaginitis | Vaginal inflammation. 163
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| venereal disease (VD) | An older term for a sexually transmitted infection. 136
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| withdrawal | The removal of the penis from the vagina prior to ejaculation (an ineffective method of contraception); as used relative to sexually transmitted infections, a shutting off of social contacts. 166, 381
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2002 McGraw-Hill Higher Education