ABSTRACT
The prevalences of several sexually transmitted diseases (STD) among patients attending a public STD clinic were determined in a prospective study. Rates of gonorrhea, syphilis, genital herpes, trichomoniasis, nongonococcal urethritis, pediculosis pubis, scabies, and venereal warts were ascertained according to sex, sexual preference, and race. Numbers of cases of diseases not routinely reported to most public health agencies exceeded numbers of cases of diseases that are routinely reported. Rates of gonorrhea were higher among men than among women and higher among blacks than among whites. Syphilis was most common among homosexual men. Trichomoniasis was three times more frequent among blacks than among whites. Rates of nongonococcal urethritis among heterosexual men were almost twice those among homosexual men. Whites were more likely than blacks to have pediculosis pubis, scabies, and venereal warts. STD not routinely reported to most public health agencies are commonly seen in public clinics, and rates vary according to sex, sexual preference, and race.
Subject(s)
Sexually Transmitted Diseases/epidemiology , Black or African American , Female , Gonorrhea/epidemiology , Herpes Genitalis/epidemiology , Homosexuality , Humans , Lice Infestations/epidemiology , Male , New York , Prospective Studies , Risk , Scabies/epidemiology , Sex Factors , Syphilis/epidemiology , Urethritis/epidemiology , White PeopleABSTRACT
The preparation and properties of a highly cross-linked dibutyl phthalate-modified methyl methacrylate polymer are described. The material is virtually optically isotropic with a refractive index near 1.5 and exhibits low absorption in the wavelength region 3000 A to 2 micro. It exhibits good dimensional stability when properly annealed and can be easily polished to close optical tolerances. It is unaffected by many organic and inorganic solvents. Careful preparation and annealing have removed gross density gradients and adventitious particle scattering in the medium.
