1 / 15

Emerging Viruses

Emerging Viruses. Inverted Geese . Purpose. We are seeking to understand the impact of infectiousness and total population deaths, with deaths per infected individual . Using the examples of Ebola and Influenza (common flu) and the comparison of their infectiousness and lethality.

verlee
Download Presentation

Emerging Viruses

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Emerging Viruses Inverted Geese .

  2. Purpose • We are seeking to understand the impact of infectiousness and total population deaths, with deaths per infected individual. • Using the examples of Ebola and Influenza (common flu) and the comparison of their infectiousness and lethality. • Since Ebola has a high mortality rate but low infection rate and Influenza has a high infection rate and low mortality rate, the comparison of these two viruses will help further explain the impact of infectiousness and help us to asses the likelihood of contracting Ebola ourselves.

  3. What is Ebola? • The name “Ebola” comes from the Ebola river that runs through tropical African countries. • It is a flivoviors virus which is categorized as belonging to the virus family Filoviridae *http://www.cdc.gov/ncidod/dvrd/spb/mnpages/dispages/Fact_Sheets/Filovirus_Fact_Sheet.pdf

  4. How is Ebola spread? • The Ebola virions enter the host cells through endocytosis1and replication occurs in the cytoplasm. • Upon infection, the virus targets the host blood coagulative2and immune defense system and leads to severe immunosuppression3.

  5. How deadly is Ebola? • It’s insanely effective once it is transmitted and usually kills within 5-10 days. • Symptoms can include onset fever, internal bleeding, hemorrhages from mouth and eyes, diarrhea, extreme malise, and vomiting. • The CDC reports that there have been about 1500 deaths related to Ebola since 1976 • The average death rate upon infection is 70%.

  6. Why is the infectivity low… • The virus is transmitted primarily fluid to fluid but can also be passed body to body. • Because it isn’t airborne, big outbreaks are shown quickly and leans out fast due to the effectiveness of the virus at causing death. • Therefore the virus can be contained quickly and the infectivity is low.

  7. And death rate high? • The virus breaks down the clotting factor in the blood. This causes the blood to thin out exponentially leading to blood loss from all body orifices. • Many tribes in Africa (where the virus originated) have rituals that involve touching the dead. • This led to a large spread of infections from deaths that were contributed to Ebola.

  8. What is Influenza? • Influenza is most commonly known as the flu. • It’s a viral infection of the nose, throat, and lungs.

  9. How does Influenza infect? • The virus infects a host by using the host’s cell surface proteins to inject its genetic material to be replicated throughout the cell and eventually spreading throughout the organism. • It is transmitted through the air (i.e. coughs, sneezes, etc.) • It can also be contracted through contact with contaminated surfaces

  10. How deadly is Influenza? • Symptoms of influenza include the “chills”, fever, aches and pains, cough, nasal congestion, fatigue, and headache. • Since the seasonal flu deaths range year to year, it has been estimated that the flu-associated deaths from 1976-2007 range from a low of 3,000 to a high of 49,000. • 90% of influenza-associated deaths occur among adults 65 years or older. • The ratio of infected individuals to mortality rate is 0.45%.

  11. Why is the infectivity high… • Influenza is an airborne virus therefore can be spread quickly and easily to a large group before being controlled. • People are often un-hygienic. The disease spreads when people don’t wash their hands, cover their mouth when they sneeze or cough and are generally gross.

  12. And death rate low? • Influenza is a very evolved virus. It infects within 48 hours and leave symptoms that last for a while without automatically killing them. • The vaccine allows the death toll to be lowered dramatically.

  13. Comparing the Two Viruses • Where and when the virus can be traced back to. • - Influenza can be traced back for hundred of thousands of years • - Ebola has only been traced back as far as the mid-70’s and has only really spread in third world countries in Africa

  14. Comparing the Two Viruses • Since influenza virus was discovered hundreds of years ago there’s been plenty of time to create a vaccine where there is really no vaccine to fight Ebola.

  15. Additional Questions • Can Ebola mutate itself into a more transmittable virus such as Influenza without losing its mortality? • Can Ebola be transmitted to mother to fetus or child since it is transmitted through fluids?

More Related