sentences:  Some of the important diseases are HIV infection, syphilis, gonorrhea, candidiasis, herpes simplex, human papillomavirus infection, and genital scabies.Other sexually transmitted infections studied in the field include chancroid, lymphogranuloma venereum, granuloma inguinale, hepatitis B, and cytomegalovirus infection.In India, formal training of venerologists started in 1910, prompting microscopy and serology to come into general use throughout the Empire.