March 2014

Attenuated influenza vaccine enhances bacterial colonization of mice

Infection with influenza virus is known to increase susceptibility to bacterial infections of the respiratory tract. In a mouse model of influenza, increased bacterial colonization was also observed after administration of an infectious, attenuated influenza virus vaccine. Primary influenza virus infection increases colonization of the human upper and lower respiratory tract with bacteria, including Streptococcus …

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Pithovirus: Bigger than Pandoravirus with a smaller genome

A new virus called Pithovirus sibericum has been isolated from 30,000 year old Siberian permafrost. It is the oldest DNA virus of eukaryotes ever isolated, showing that viruses can retain infectivity in nature for very long periods of time. Pithovirus was isolated by inoculating cultures of the amoeba Acanthamoeba castellani with samples taken in the year 2000 from 30 meters below …

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