Component of ART given to the mother in the prevention of mother to child transmission –
**Core Concept**
Antiretroviral therapy (ART) plays a crucial role in preventing mother-to-child transmission (MTCT) of HIV. The mother is administered antiretroviral medications to reduce the viral load and prevent transmission to the fetus.
**Why the Correct Answer is Right**
The most commonly used antiretroviral regimen for PMTCT (prevention of mother-to-child transmission) includes a combination of two nucleoside reverse transcriptase inhibitors (NRTIs) and a protease inhibitor (PI) or a non-nucleoside reverse transcriptase inhibitor (NNRTI). The NRTIs work by inhibiting the reverse transcriptase enzyme, which is essential for the replication of retroviruses like HIV. The PI or NNRTI further inhibits the protease enzyme, which is necessary for the maturation of viral particles.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Nucleoside reverse transcriptase inhibitors (NRTIs) are typically used in combination with other ART components.
**Option B:** This option is incorrect because the combination of Lamivudine and Zidovudine is a common NRTI combination but does not include the component specifically given to the mother in the prevention of mother-to-child transmission.
**Option C:** This option is incorrect because the combination of Nevirapine and Zidovudine is used in some ART regimens but is not the correct component given to the mother in the prevention of mother-to-child transmission.
**Clinical Pearl / High-Yield Fact**
The World Health Organization recommends a combination of antiretroviral medications, including a dual NRTI and a single dose of nevirapine or a short course of lopinavir/ritonavir, for the prevention of mother-to-child transmission of HIV.
**Correct Answer:** D. Nevirapine