Baculoviridae. Nonoccluded Baculoviruses

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Abstract
The family Baculoviridae is characterized by rod-shaped virions with a probable relative molecular weight of 109 for enveloped single nucleocapsids. Virions of the Oryctes baculovirus are basically rod-shaped, singly enveloped nucleocapsids. The deoxyribonucleic acid appears to lack the conserved sequences associated with the polyhedrin gene of subgroup A and B baculoviruses. The cricket baculovirus was isolated by Huger from heavily diseased nymphs and adults of the field cricket, Gryllus campestris , derived from rearings in southern Germany. The T-virus of C. mediterraneus shares the general characteristics of nonoccluded baculoviruses, but differs by the occurrence of both rod-shaped and bow-shaped enveloped nucleocapsids in infected cell nuclei. The baculovirus of C. maenas replicates in the nuclei of hemocytes and connective tissue cells. Infected cells are expelled into the lumen of the tubules, while cellular regeneration and tissue repair take place.