Ans:- severe acute respiratory sydrome is caused by severe acute respiratory coronaviru and it spreads through respiratory droplets when infected person coughs and sneezes and the virus can also spread when a person touches the surface or a object that is contaminated with this virus and then touch his mouth ,nose is eyes.
Middle East respiratory syndrome:- it is caused by middle East respiratory coronavirus and it is a zoonotic virus which means a virus that transmitted between animals and humans.
It is spread from person to person through respiratory secretions and care of a infected person. Raw or uncooked camel meat,and unpasteurized dairy products of camel.
Spread of measles:- through droplets,
- blood,
- urine.
Spread of rubella:- - through droplets,
- mother to fetus because it is one of torch viruses.
Spread of Zika virus:- through Aedes aegypti mosquito,
- sexual contact,
- blood transfusion.etc.
Pathogenesis of the HIV is shown in following image:-
Pathogenesis of influenza virus A is shown in following image:-
ASSIGUMENT How does Severe Acute Respiratory Syndrome Coronavirus(SARS-Cov) and Middle East Respiratory Syndrome Co...
Find SARS-CoV-2 on the phylogeny above – this is the virus that causes COVID-19. There have been two previous major coronavirus outbreaks in 21st century – SARS in 2002-2003 (caused by the virus SARS-CoV) and MERS in 2012-2013 (caused by the virus MERS-CoV). (a)Based on the phylogeny above, how do we know that COVID-19 is a new disease and not a resurgence of SARS or MERS? Be specific and refer to the relationships shown on the phylogeny in your answer....
5.To gain entry, spikes of the SARS-CoV-2 bind to angiotensin-converting enzyme 2 (ACE2) found in epithelial cells especially of the respiratory and oral passageways. As such, these cells are susceptible to infection by SARS-CoV-2. ACE2 is a protein consisting of multiple alpha-helices that is embedded in, and spans, the membrane. What is this type of protein called, and what structure do the alpha helices represent? 6.Following binding of spike proteins to ACE2, SARS-CoV-2 likely gains entry into the cell either...