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Titre du document / Document title

A picorna-like virus from the red imported fire ant, Solenopsis invicta: initial discovery, genome sequence, and characterization

Auteur(s) / Author(s)

VALLES Steven M. ; STRONG Charles A. ; DANG Phat M. ; HUNTER Wayne B. ; PEREIRA Roberto M. ; OI David H. ; SHAPIRO Alexandra M. ; WILLIAMS David F. ;

Résumé / Abstract

We report the first discovery and genome sequence of a virus infecting the red imported fire ant, Solenopsis invicta. The 8026 nucleotide. polyadenylated, RNA genome encoded two large open reading frames (ORF1 and ORF2),flanked and separated by 27, 223, and 171 nucleotide untranslated regions, respectively. The predicted amino acid sequence of the 5' proximal ORFI (nucleotides 28 to 4218) exhibited significant identity and possessed consensus sequences characteristic of the helicase, cysteine protease, and RNA-dependent RNA polymerase sequence motifs from picomaviruses, picorna-like viruses, comoviruses, caliciviruses, and sequiviruses. The predicted amino acid sequence of the 3' proximal ORF2 (nucleotides 4390-7803) showed similarity to structural proteins in picorna-like viruses, especially the acute bee paralysis virus. Electron microscopic examination of negatively stained samples from virus-infected fire ants revealed isometric particles with a diameter of 31 nm, consistent with Picornaviridae. A survey for the fire ant virus from areas around Florida revealed a pattern of fairly widespread distribution. Among 168 nests surveyed, 22.9% were infected. The virus was found to infect all fire ant caste members and developmental stages, including eggs, early (1st-2nd) and late (3rd-4th) instars, worker pupae, workers, sexual pupae, alates (♂ and ♀), and queens. The virus, tentatively named S. invicta virus (SINV-1), appears to belong to the picorna-like viruses. We did not observe any perceptible symptoms among infected nests in the field. However, in every case where an SINV-1-infected colony was excavated from the field with an inseminated queen and held in the laboratory, all of the brood in these colonies died within 3 months.

Revue / Journal Title

Virology    ISSN  0042-6822   CODEN VIRLAX 

Source / Source

2004, vol. 328, no1, pp. 151-157 [7 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1955) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 7801, 35400012241205.0150

Nº notice refdoc (ud4) : 16136604



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