Solenopsis invicta virus-1A (SINV-1A): Distinct species or genotype of SINV-1?

Abstract

We have cloned and sequenced a 2845 bp cDNA representing the 3′-end of either a new picorna-like virus species or genotype of Solenopsis invicta virus-1 (SINV-1). Analysis of the nucleotide sequence revealed 1 large open reading frame. The amino acid sequence of the translated open reading frame was most identical to structural proteins of SINV-1 (97%), followed by the Kashmir bee virus (KBV, 30%), and acute bee paralysis virus (ABPV, 29%). A PCR-based survey for SINV-1 and the new species or genotype (tentatively named S. invicta virus-1A, SINV-1A) using RNA extracts of S. invicta collected around Gainesville, Florida, revealed a mean colony infestation rate of 25% by SINV-1 and 55% by SINV-1A. Both SINV-1 and SINV-1A were found to co-infect 17.5% of the nests surveyed. Although the data preclude definitive species or genotype assignment, there is no doubt that SINV-1A is distinct from SINV-1, identifiable, and infects S. invicta. We provide a simple RT-PCR technique capable of discerning SINV-1 and SINV-1A infection of S. invicta.