Question: What Is An Example Of A Latent Viral Infection?

Is influenza A latent virus?

Influenza virus, like most other acute respiratory viruses, typically does not cause long-term latent or persistent infections in humans..

Can RNA viruses be latent?

In latent infection, viral RNA or DNA remains in host cells but does not replicate or cause disease for a long time, sometimes for many years. Latent viral infections may be transmissible during the asymptomatic period, facilitating person-to-person spread.

What viruses lay dormant in the body?

Dormant viruses are not new phenomena. Herpes viruses are often never fully eradicated from the body, and are instead subdued by the immune system. The herpes virus that causes chickenpox and shingles (VZV), for example, remains in our spinal cord cells for life.

Why are some viruses latent?

Virus latency is generally maintained by a few viral genes that keep the viral genome silent and escape from host immune system. Eukaryotic viruses like some herpesviridae or retroviridae are able to infect their host lifelong thanks to latency.

Can viruses last for months?

Acute infections, which are short-lived. Chronic infections, which can last for weeks, months, or a lifetime. Latent infections, which may not cause symptoms at first but can reactivate over a period of months and years.

What are 4 examples of viruses?

Viral diseasessmallpox.the common cold and different types of flu.measles, mumps, rubella, chicken pox, and shingles.hepatitis.herpes and cold sores.polio.rabies.Ebola and Hanta fever.More items…•

What is the deadliest disease in history?

Cholera, bubonic plague, smallpox, and influenza are some of the most brutal killers in human history. And outbreaks of these diseases across international borders, are properly defined as pandemic, especially smallpox, which throughout history, has killed between 300-500 million people in its 12,000 year existence.

What activates a latent virus?

The genome of a virus that causes latent infection of cells must be transcribed and translated into viral proteins. This occurs when the virus is reactivated from a latent stage to a lytic stage. Certain viral genes that are specific to each virus initiate this reactivation process.

Are all viruses latent?

Although many viruses are capable of subclinical infection, only a few are known to undergo true latency. In latent infection, the full viral genome is retained in the host cell, but its expression is dramatically restricted, such that few viral antigens and no viral particles are produced.

What are 5 examples of viruses?

Examples of exanthematous viral diseases include:measles.rubella.chickenpox/shingles.roseola.smallpox.fifth disease.chikungunya virus infection.

Do viruses lie dormant in the body?

Virus latency (or viral latency) is the ability of a pathogenic virus to lie dormant (latent) within a cell, denoted as the lysogenic part of the viral life cycle. A latent viral infection is a type of persistent viral infection which is distinguished from a chronic viral infection.

What is the most deadliest disease?

Summary. In 2018, the five deadliest illnesses in the U.S. were heart disease, cancer, lung disease, cerebrovascular disease, and Alzheimer’s disease. The other leading causes of death due to disease were diabetes, influenza and pneumonia, and kidney disease.