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2017 ; 25
(5
): 402-412
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Collective Infectious Units in Viruses
#MMPMID28262512
Sanjuán R
Trends Microbiol
2017[May]; 25
(5
): 402-412
PMID28262512
show ga
Increasing evidence indicates that viruses do not simply propagate as independent
virions among cells, organs, and hosts. Instead, viral spread is often mediated
by structures that simultaneously transport groups of viral genomes, such as
polyploid virions, aggregates of virions, virion-containing proteinaceous
structures, secreted lipid vesicles, and virus-induced cell-cell contacts. These
structures increase the multiplicity of infection, independently of viral
population density and transmission bottlenecks. Collective infectious units may
contribute to the maintenance of viral genetic diversity, and could have
implications for the evolution of social-like virus-virus interactions. These may
include various forms of cooperation such as immunity evasion, genetic
complementation, division of labor, and relaxation of fitness trade-offs, but
also noncooperative interactions such as negative dominance and interference,
potentially leading to conflict.