Which of the following is a lentivirus
**Core Concept**
Lentiviruses are a subfamily of retroviruses that infect a wide range of cells, including immune cells, and are characterized by their ability to integrate into the host genome and replicate in both dividing and non-dividing cells. They are known to cause diseases such as HIV/AIDS.
**Why the Correct Answer is Right**
Lentiviruses, like HIV, have a unique ability to infect and replicate in immune cells, including CD4+ T cells, macrophages, and dendritic cells. This is due to the presence of the envelope glycoproteins gp120 and gp41, which facilitate viral entry into host cells. Once inside, the viral genome is reverse transcribed into DNA, which is then integrated into the host genome. This integration allows the virus to persist in the host for extended periods.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it refers to a different type of virus, such as influenza or parainfluenza, which are not classified as lentiviruses.
**Option B:** This option is incorrect because it refers to a type of virus that causes a different disease, such as herpes simplex or varicella-zoster, which are not classified as lentiviruses.
**Option C:** This option is incorrect because it refers to a type of virus that causes a different disease, such as hepatitis B or C, which are not classified as lentiviruses.
**Clinical Pearl / High-Yield Fact**
Lentiviruses, such as HIV, often target and destroy immune cells, leading to a weakened immune system and increased susceptibility to opportunistic infections. This is a key aspect of their pathogenesis and highlights the importance of early diagnosis and treatment.
**Correct Answer:** C. HIV