Sharply rising cases of some sexually transmitted diseases, including a 26% rise in new syphilis infections reported last year, are prompting US health officials to call for new prevention and treatment efforts. ... Infections rates for some STDs, including gonorrhea and syphilis, have been rising for years. Last year the rate of syphilis cases reached its highest since 1991 and the total number of cases hit its highest since 1948. HIV cases are also on the rise, up 16% last year. An international outbreak of monkeypox has further highlighted the nation’s worsening problem with diseases spread mostly through sex. ......