A rare sexually transmitted disease that can scar the genitals has been found in two patients in New York, and the strain is the same as that recently detected in Europe, the city’s health commissioner said Wednesday. Lymphogranuloma venereum, or LGV, is a form of chlamydia that can damage the bowels and scar the anus. Among the few patients that have been identified in the United States, most also had the AIDS (news - web sites) virus, Health Department Commissioner Thomas Frieden said at a news conference.