title: Move over, bacteria! Viruses make their mark as mutualistic microbial symbionts.
abstract: Viruses are being redefined as more than just pathogens. They are also critical symbiotic partners in the health of their hosts. In some cases, viruses have fused with their hosts in symbiogenetic relationships. Mutualistic interactions are found in plant, insect, and mammalian viruses, as well as with eukaryotic and prokaryotic microbes, and some interactions involve multiple players of the holobiont. With increased virus discovery, more mutualistic interactions are being described and more will undoubtedly be discovered.
authors.affiliation: Department of Plant Pathology and Environmental Microbiology, Department of Biology, and Center for Infectious Disease Dynamics, Pennsylvania State University, University Park, Pennsylvania, USA mjr25@psu.edu.
authors.forename: Marilyn J
authors.initials: MJ
authors.lastname: Roossinck
mesh_terms: D000818:Animals; D001419:Bacteria / Q000821:virology*; D007313:Insecta / Q000821:virology*; D008322:Mammals / Q000821:virology*; D010944:Plants / Q000821:virology*; D013559:Symbiosis; D018406:Virus Physiological Phenomena; D014780:Viruses / Q000254:growth & development*