Viruses

Reference
? Werren Levinson. edition . Review of Medical Microbiology and
Immunology.
13 edition.
?Jawetz, Melnick, & Adelberg’s. Medical Microbiology, 27 edition

Objectives of the lecture
? understand the important chemical substances that make the architecture of any virus. Their
arrangement, shape, importance and their role in viral pathogenicity and immunogenicity.
? Explain the general significance of genome composition, envelope and replication strategy
for the classification and detection of viruses.
? the different habitats that may be occupied by microbes.
o the terms, reservoir, source and mode of transmission in the context of infection.
? Compare and contrast the key properties of Bacteria and Viruses as distinct from Eukaryotic
cells.
? Understanding the terms, Carriage, Normal flora (microbiota) and Commensal
? What is infection?
o What causes infection?
o Why do particular individuals get particular infections? o What influences the outcome of
infection?
? Explain the terms Pathogen and Non-pathogen
? Explain the significance of acid fast stains for the classification and detection of bacteria.

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? tBherocuaguhse thbeactevriiraulses filptearsss, tkhneorwefnoraes (ftihlteerabvlieruvsierussesw)e.

Viruses are not considered as cell because they do not have a cellular
composition and inert metabolically. They lack cellular organelles such
as: nucleus, cytoplasm, mitochondria, ribosome, Golgi apparatus, and
endoplasmic reticulum.
? Viruses can not seen by light microscope( therefore the viruses termed
as submicroscopic agents), but they can seen by electronic microscope