1,2,3 Flashcards
What is one health?
A multisectoral approach/ collaboration with the goal of the improvement of human health and of the planet
Causative agent of Severe acute respiratory Syndrome?
-where was it first isolated from?
Severe Acute Respiratory-Coronavirus (SARS-CoV)
- Himalayan Palm Civets (Paguma larvata)
The infectious pathogen is made of an RNA without a protein coat
Viroid
Characteristics of a Virus
- They cannot make or capture and store free energy.
- They can only make proteins and multiply inside a host cell using the cell’s machinery
- Have genomes smaller that of prokaryotes
The difference between emerging and re-emerging infectious disease
Emerging infectious disease refers to the outbreak of a previously unknown disease while re-emerging infectious disease refers to the outbreak of an already known disease. These are diseases that have appeared again after its significant decline.
Define progressive, or escape hypothesis
It states that viruses arose from genetic elements that gained the ability to move between cells
Define The regressive, or reduction hypothesis
Asserts that viruses are remnants of cellular organisms.
- That viruses may be descendants of more complex ancestors
Describe virus first hypothesis
states that viruses predate or coevolved with their current cellular hosts.
-Viruses existed in a precellular world as self-replicating units, that in overtime became more complex and organized.
What is the first filterable infectious agent discovered
Tobacco Mosaic Virus
What was the first virus of vertebrates discovered?
Foot and mouth disease virus
the term for a fully assembled infective virus
virion
Fundamental component of a virion
nucleoprotein core with the ability to infect host cells and replicate in them.
A protein coat that encloses and protects the nucleic acid of a virus
Capsid
The proteins subunits and the nucleic acid are arranged in a helix
Helical symmetry
A symmetric shell that covers the nucleic acid-containing core
Icosahedral symmetry
