Viruses Study Materials - Edubirdie

University:
Western Sydney University
Course:
MEDI 2003 | Clinical Sciences 2
Academic year:

2024
Views:

86

Pages:

1
Author:

Mariam A. A.

Viruses ✓ Virus is classified as a non-cellular pathogen as they have living and non-living features. ✓ They are not made up of cells but rather they have a protein coat containing genetic information in the form of DNA or RNA. ✓ This means that they are able to pass on their genetic information via DNA/RNA replication and (produce more virus via protein synthesis)- replication happens due to the virus’s protein synthesis. ✓ Virus cannot reproduce by itself but must rely on a host cell for replication- (can only replication inside the host cell) This is because it does not have ribosomes and uses the host cell’s organelles and reproductive mechanisms to replicate itself. ✓ Antibiotics are used to destroy cells or disrupt cell metabolism and so are effective against bacteria. However, Viruses do not have cells or perform metabolic activities and thus antibiotics are ineffective against them. Antibiotic they destroy life, viruses are not living because they are non-cellular, thus they are ineffective against virus. ✓ Vaccines are often used to defend against viral diseases by triggering a ‘false-alarm’ immune response that will protect against virus when there is a real attack. We will formally introduce and explore how vaccines work in later weeks Example of Viruses Name of Virus Influenza Type A Virus Name disease Influenza A of Symptoms ✓ ✓ ✓ ✓ Sore throat Fever Headache Fatigue Mode of Transmission ✓ Air transmission via water droplets from sneezing or coughing. ✓ Inhalation or oral ingestion after unknowingly touching the virus (e.g., park bench).

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