Virus associated with cancer cervix is:
**Core Concept**
The question is testing the association between a specific virus and a particular type of cancer. Human Papillomavirus (HPV) is a well-established cause of cervical cancer, with high-risk strains such as HPV-16 and HPV-18 being responsible for the majority of cases.
**Why the Correct Answer is Right**
HPV infects epithelial cells and can lead to persistent infection, which in turn can cause genetic instability and oncogenesis. The virus's E6 and E7 oncogenes interfere with the cell cycle, leading to uncontrolled cell growth and tumor formation. The development of cervical cancer is a multi-step process, with HPV infection being the initial step.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because there is no established association between HSV-1 (Herpes Simplex Virus Type 1) and cancer of the cervix. While HSV-1 can cause genital herpes, it is not a known risk factor for cervical cancer.
**Option B:** This option is incorrect because Chlamydia trachomatis is a bacterium that causes chlamydia, a sexually transmitted infection. While chlamydia can increase the risk of cervical cancer, it is not a direct cause of the disease.
**Option C:** This option is incorrect because Human Immunodeficiency Virus (HIV) is a virus that causes AIDS, a condition that weakens the immune system. While HIV-infected individuals are at increased risk of cervical cancer due to immunosuppression, HIV itself is not a direct cause of the disease.
**Clinical Pearl / High-Yield Fact**
It's essential to note that HPV vaccination (e.g., Gardasil) can prevent cervical cancer by targeting high-risk HPV strains.
**Correct Answer:** C. Human Papillomavirus (HPV)