Myxoviruses include –
**Core Concept**
Myxoviruses are a group of viruses that belong to the family Orthomyxoviridae. They are enveloped, single-stranded RNA viruses that are characterized by their ability to cause significant morbidity and mortality in humans. Myxoviruses are responsible for some of the most severe and infectious diseases known to humans.
**Why the Correct Answer is Right**
The correct answer is Influenza viruses. This is because Influenza viruses are the primary members of the Myxoviridae family. They are responsible for causing seasonal epidemics of influenza, as well as more severe outbreaks such as the 1918 Spanish flu pandemic. The Influenza virus is highly contagious and can cause significant morbidity and mortality in humans, especially in high-risk populations such as the elderly and young children.
**Why Each Wrong Option is Incorrect**
**Option A:** Coronaviruses are a different family of viruses that are characterized by their crown-like appearance under the electron microscope. They are responsible for causing respiratory illnesses such as COVID-19, but they are not members of the Myxoviridae family.
**Option B:** Adenoviruses are a group of viruses that are characterized by their ability to cause a wide range of illnesses, including respiratory, gastrointestinal, and conjunctival infections. While they are significant pathogens, they are not members of the Myxoviridae family.
**Option C:** Poxviruses are a group of viruses that are characterized by their complex structure and ability to cause a wide range of illnesses, including smallpox and cowpox. They are not members of the Myxoviridae family.
**Clinical Pearl / High-Yield Fact**
It's worth noting that the term "myxovirus" is no longer used to classify these viruses, and they are now referred to as Orthomyxoviruses. However, the term "myxovirus" is still used in some older texts and may appear on exams.
**Correct Answer:** C. Poxviruses are a group of viruses that are characterized by their complex structure and ability to cause a wide range of illnesses, including smallpox and cowpox.