Mother to child transmission in vectors is called-
💡 Explanation
## **Core Concept**
The question pertains to the mode of transmission of diseases from mother to child through vectors. This concept is crucial in understanding the life cycle of certain pathogens and how they are transmitted across generations.
## **Why the Correct Answer is Right**
The correct term for mother to child transmission in vectors is **transovarial transmission**. This process involves the passage of pathogens from a female vector (such as a mosquito) to her offspring through eggs. This mode of transmission is significant for certain diseases, as it allows the pathogen to be maintained within the vector population across generations.
## **Why Each Wrong Option is Incorrect**
- **Option A:** While some diseases may be transmitted through direct contact or other means, the term for mother to child transmission specifically through vectors is not provided here.
- **Option B:** This option does not accurately describe the specific mode of transmission from mother to child through vectors.
- **Option D:** Similarly, this option does not correctly represent the term for transovarial transmission.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **transovarial transmission** is a critical mechanism for the maintenance of certain vector-borne diseases, such as **Rocky Mountain spotted fever** and **lyme disease** in ticks, and **dengue fever** and **chikungunya** in mosquitoes. Understanding this concept helps in developing strategies for disease control and prevention.