A New Iridovirus of Two Species of Terrestrial Isopods, Armadillidium vulgare and Porcellioscaber

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Abstract
A new iridovirus, named isopod iridescent virus (IIV), was isolated from 2 spp. of terrestrial isopods in Berkeley, California, USA. Infected individuals of A. vulgare and P. scaber (Crustacea:Isopoda) appeared purple in color: in thin sections, hemocytes, nerve cells and fat body cells contained cytoplasmic aggregations of virions. Isolated particles, 135 nm in diameter in negative stain, contained DNA and included at least 19 polypeptide components. The virus was transmitted per os and by injection to healthy isopods and by injection to larvae of a coleopteran [Phyllophaga anxia]. IIV from the isopod hosts differed from Tipula iridescent virus (TIV) in buoyant density, MW of major polypeptides and serological reactions with antisera to IIV and TIV.

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