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Classification of Viruses - Coggle Diagram
Classification of Viruses
Based on presence of nucleic acid
DNA virus
Single-stranded (ss) DNA virus: e.g., Picornaviruses, Double-stranded (ds) DNA virus: e.g., Adenovirus,
RNA virus
Double-stranded (ds) RNA virus: Reovirus, Single-stranded (ss) RNA virus → further classified into two positive sense
RNA (+RNA) and negative sense RNA (-RNA), Poliovirus
Based on replication properties and site of replication
Within cytoplasm of the host cell
Within nucleus and the cytoplasm of the host cell
Within nucleus of the host cell
Through the double-stranded DNA intermediate
Through a single-stranded RNA intermediate
Based on host range
Animal viruses
Infect plants by invading plant cells
Plant viruses
Infect by invading cells of animals, including humans
Bacteriophage
Virus which infects bacterial cells
Insect virus
Infects insects, also called the viral pathogen of insects
Based on structure or symmetry
Complex virus
Radial symmetry virus
Cubical or icosahedral symmetry shaped virus
Rod or spiral shaped or helical symmetry virus
Based on modes of transmission
Sexually transmitted diseases
Through sexual contacts with infected
person
Transfusion-transmitted infections
Through blood transfusion
Faecal oral route
Through contaminated water or food
Zoonoses
Through biting of infected animals, birds, and insects to
human
Airborne infections
Through air into respiratory tract