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The proportional lack of archaeal pathogens: Do viruses/phages hold the key?
Author(s) -
Gill Erin E.,
Brinkman Fiona S. L.
Publication year - 2011
Publication title -
bioessays
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.175
H-Index - 184
eISSN - 1521-1878
pISSN - 0265-9247
DOI - 10.1002/bies.201000091
Subject(s) - archaea , biology , bacteria , virulence , horizontal gene transfer , bacterial virus , microbiology and biotechnology , virus , bacteriophage , virology , genetics , genome , gene , escherichia coli
Although Archaea inhabit the human body and possess some characteristics of pathogens, there is a notable lack of pathogenic archaeal species identified to date. We hypothesize that the scarcity of disease‐causing Archaea is due, in part, to mutually‐exclusive phage and virus populations infecting Bacteria and Archaea, coupled with an association of bacterial virulence factors with phages or mobile elements. The ability of bacterial phages to infect Bacteria and then use them as a vehicle to infect eukaryotes may be difficult for archaeal viruses to evolve independently. Differences in extracellular structures between Bacteria and Archaea would make adsorption of bacterial phage particles onto Archaea (i.e. horizontal transfer of virulence) exceedingly hard. If phage and virus populations are indeed exclusive to their respective host Domains, this has important implications for both the evolution of pathogens and approaches to infectious disease control.