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Viral Community Assembly In Puerto Rican Bats, Anna Sjodin

Doctoral Dissertations

Viruses are the most abundant biological entity on Earth, yet little is known about the factors driving their abundance, frequency of occurrence, and distribution in non-human hosts. Most emerging infectious diseases of humans originate in wildlife, up to a quarter of which are caused by viruses, creating an urgent need to broaden understanding of viral systems. With its theoretical depth, ecology can provide mechanistic insights about viral diversity, with broad implications for public health and wildlife conservation. Unfortunately, few datasets exist that allow a thorough exploration of viral ecology, and the process of defining viral species can prohibit timely conclusions. …

Biological Activities Of Influenza Virus Subpopulations: Characterization Of Infectious, Interferon-Inducing And Interferon Induction-Suppressing Particles, Christopher P. Malinoski

Doctoral Dissertations

This dissertation explores the complex nature of the influenza virus quasispecies. Influenza populations exist as a mixture of mostly replication-deficient biologically-active particles. These particles are measured and quantified based upon the phenotype they manifest upon entry into the host. Three subpopulations are characterized: infectious, interferon-inducing, and interferon induction-suppressing particles.

It has been observed that only 5 out of every 100 particles of influenza are infectious. A novel biological assay was developed and, for the first time, directly demonstrated that infectious particles are the progenitors of all other virus particles. From the disparity observed to exist between the numbers of physical …