Papillomaviridae
Chapter 47 Papillomaviridae Members of the family Papillomaviridae are non-enveloped with icosahedral capsids (Fig. 47.1). Virions contain a single molecule of circular double-stranded DNA. The name is derived from the…
Bunyaviridae
Chapter 64 Bunyaviridae This family is one of the largest, with more than 300 member species. Bunyaviruses derive their name from Bunyamwera, the location in Uganda where the type species…
Coronaviridae
Chapter 62 Coronaviridae The family Coronaviridae (Latin corona meaning crown) belongs to the Order Nidovirales, which also includes the family Arteriviridae. Coronaviruses are large, pleomorphic, enveloped viruses. Virions contain a…
Parvoviridae
Chapter 45 Parvoviridae Parvoviruses (from the Latin word parvus meaning small) are unenveloped, icosahedral in symmetry and possess a linear genome of single-stranded DNA (Fig. 45.1). Their size ranges from…
Picornaviridae
Chapter 52 Picornaviridae Picornaviruses get their name from the prefix ‘pico’ meaning very small and the abbreviation for ribonucleic acid. In keeping with their name these viruses are only 22–30 nm…
Circoviridae
Chapter 46 Circoviridae This family is relatively new and comprises viruses of vertebrates. Circoviruses are non-enveloped, icosahedral in structure and generally range from 20–26 nm in diameter. A distinctive capsid surface…
Prions (proteinaceous infectious agents)
Chapter 67 Prions (proteinaceous infectious agents) Several neurodegenerative diseases of animals and man belong to a group known as transmissible spongiform encephalopathies (TSEs), which are viewed as part of a…
Bornaviridae
Chapter 66 Bornaviridae The family Bornaviridae belongs to the order Mononegavirales. There is a single genus, Bornavirus, with a single member species, Borna disease virus (BDV). However, proventicular dilatation disease…
Arteriviridae
Chapter 58 Arteriviridae Arteriviruses were formerly classified as members of Togaviridae on the basis of morphological similarities. However, their genome organization and replication strategy is similar to members of Coronaviridae….
Orthomyxoviridae
Chapter 60 Orthomyxoviridae The name orthomyxovirus is derived from two Greek words, orthos meaning correct or proper and myxa meaning mucus. The family includes the viruses responsible for influenza. Influenza…
