Mode of spread of Enterovirus is:
**Core Concept**
Enteroviruses are a group of non-enveloped, single-stranded RNA viruses that primarily infect the gastrointestinal tract and can lead to a variety of clinical manifestations, including mild respiratory illness to severe neurological diseases. They are highly contagious and spread through fecal-oral transmission.
**Why the Correct Answer is Right**
Enteroviruses are shed in the feces of infected individuals, and the virus can survive on surfaces for extended periods. When an individual comes into contact with contaminated feces, they can become infected through the fecal-oral route. This mode of transmission is facilitated by poor hygiene practices, such as not washing hands frequently, especially after using the bathroom or before handling food.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Enteroviruses are not primarily spread through respiratory droplets, unlike influenza or COVID-19.
**Option B:** This option is incorrect because Enteroviruses do not require a vector for transmission, unlike dengue or Zika viruses.
**Option C:** This option is incorrect because Enteroviruses are not transmitted through blood transfusions, unlike HIV or hepatitis viruses.
**Clinical Pearl / High-Yield Fact**
Enteroviruses are highly contagious and can spread quickly in crowded areas, such as daycare centers, schools, and hospitals. Practicing good hygiene, including frequent handwashing, is crucial in preventing the spread of Enterovirus infections.
**Correct Answer:** D. Fecal-oral transmission.