a diyana abdullah 12 éve
935
CELL WALL
ACELLULAR MICROORGANISM (VIRUSES)
Viral structure
Other
Body
Tail
Spike
envelope
Covered the capsid
Made up of:
Carbohydrate
Protein
Lipid
Capsid
Protein coat surrounding nucleic acid
Nucleic acid
RNA
segmented ds
segmented
ss
DNA
Circular
Linear
ds, ss
Structure of virus
Virus Family
RNA viruses
Release through rupture of host cell
Orthomyxoviridae
Influenza C virus
Deltaviridae
Hepatitis D virus
Paramyxoviridae
Morbillivirus
Paramyxovirus
Filoviridae
Filovirus
Rhabdoviridae
Lyssavirus
Vesiculovirus
Coronaviridae
Coronavirus
Flaviviridae
Hepatitis C virus
Togaviridae
Rubivirus
Alphavirus
Multiplication occurs in cytoplasm
DNA viruses
DNA are release into the nucleus of infected host cell
Caliciviridae
Norovirus
Hepatitis E virus
Picornaviridae
Hepatitis A virus
Rhinovirus
Enterovirus
Hepadnaviridae
Hepadnavirus
Herpesviridae
Cytomegalovirus
Poxviridae
Molluscipoxvirus
Orthopoxvirus
Papovaviridae
Polyomavirus
Papillomavirus
Adenoviridae
Mastadenovirus
Parvoviridae
Human parvovirus
Taxonomy
Characteristics to divide viruses into taxonomic group
6. Number of capsomers in icosahedral viruses
5. Diameter of the virion or nucleocapsid
4. Presence of envelope
3. Capsid symmetry
2. Nucleic acid characteristics
1. Nature of host
Names of virus
Genus and sp. = virus
Subfamily = ends with virinae
Family = ends with viridae
Morphology
Complex viruses
Enveloped viruses
Enveloped polyhedral viruses
Simplexvirus
Enveloped helical virus
Influenzavirus
Polyhedral viruses
Poliovirus
Adenovirus
Helical viruses
Ebola virus
Size
Size comparision
Bacteriophages
Replication/Multiplication
Lysogenic cycle
Host remain alive
Lytic cycle
Host die
Host
Specific
Narrow range
Can infect
Fungi
Bacteria
Protist
Plant
Vertebrae
invertebrae
General characteristics
Multiply inside living cell
Contain protein coat
Single type nucleic acid
never both
DNA or RNA
Obligate intracellular parasite
Smaller than bacteria
Latin word "poison"
Classification
According to International Committee for Taxonomy or Virus
e. Type of host
d. Presence/absence of envelope
c. The sense (+ve/-ve) of ssRNA
b. Nucleic acid strandedness
a. Nucleic acid type
