Environmental Microbiology of Aquatic and Waste Systems

4.1 Taxonomy of Microorganisms in Aquatic Environments 95

Table 4.17 The structures of DNAviruses (From http://en.wikipedia.org/wiki/Virus_classification; Anonymous 2010 a)

S. No. Virus family Virus genus Virion – naked/enveloped Capsid symmetry Type of nucleic acid

1. Adenoviridae Adenovirus Naked Icosahedral ds


2. Papovaviridae Papillomavirus Naked Icosahedral ds circular


3. Parvoviridae B 19 virus Naked Icosahedral ss


4. Herpesviridae Herpes Simplex Virus,
   Varicella zoster virus,
   Cytomegalovirus, Epstein
   Barr virus

Enveloped Icosahedral ds

5. Poxviridae Small pox virus, Vaccinia
   virus

Complex coats Complex ds

6. Hepadnaviridae Hepatitis B virus Enveloped Icosahedral ds circular


7. Polyomaviridae Polyoma virus (progressive
   multifocal
   leucoencephalopathy)

?? ds

Table 4.15 Group VI: reverse transcribing Diploid single­stranded RNA viruses (Reproduced from Van Regenmortel et al. 2005 ;
http://www.microbiologybytes.com/virology/VirusGroups.html#VI; Anonymous 2005. With permission)
Family
Subfamily Genus Type species Hosts
Retroviridae Alpharetrovirus Avian leukosis virus Vertebrates
Betaretrovirus Mouse mammary tumor virus Vertebrates
Gammaretrovirus Murine leukemia virus Vertebrates
Deltaretrovirus Bovine leukemia virus Vertebrates
Epsilonretrovirus Walley dermal sarcoma virus Vertebrates
Lentivirus Human immunodeficiency virus 1 Vertebrates
Spumavirus Human spumavirus Vertebrates
Metaviridae Metavirus Saccharomyces cerevisiae Ty3 virus Fungi
Errantivirus Drosophila melanogaster gypsy virus Invertebrates
Pseudoviridae Pseudovirus Saccharomyces cerevisiae Ty1 virus Invertebrates
Hemivirus Drosophila melanogaster copia virus Invertebrates

Table 4.16 Group VII: DNA reverse transcribing viruses (Reproduced from Van Regenmortel et al. 2005 ; http://www.microbiologybytes.

com/virology/VirusGroups.html#VI; Anonymous 2005. With permission)

Family

Subfamily Genus Type species Hosts

Hepadnaviridae Orthohepadnavirus Hepatitis B virus Vertebrates

Avihepadnavirus Duck hepatitis B virus Vertebrates

Caulimoviridae Caulimovirus Cauliflower mosaic virus Plants

Badnavirus Commelina yellow mottle virus Plants

Cavemovirus Cassava vein mosaic virus Plants

Petuvirus Petunia vein clearing virus Plants

Soymovirus Soybean chlorotic mottle virus Plants

Tungrovirus Rice tungro bacilliform virus Plants