Read the following list of diseases: (i) Trichomoniasis (ii) Typhoid (iii) Genital herpes (iv) Hepatitis-B (v) Malaria (vi) Chlamydiasis How many of the diseases listed above are considered Sexually Transmitted Infections (STIs)?

Step-by-step solution

According to NCERT, diseases or infections which are transmitted through sexual intercourse are collectively called sexually transmitted infections (STIs) or venereal diseases (VD). Among the given list: Trichomoniasis, Genital herpes, Hepatitis-B, and Chlamydiasis are STIs. Typhoid is a bacterial infection transmitted through contaminated food and water. Malaria is a protozoan disease transmitted by the bite of an infected female Anopheles mosquito. Therefore, exactly four of the listed diseases are STIs. Answer: