Rhabdoviruses

Definition

A family of enveloped, negative-sense single-stranded RNA viruses (family Rhabdoviridae, order Mononegavirales) characterized by bullet-shaped or rod-like virions. These viruses infect an exceptionally broad host range spanning vertebrates, invertebrates, plants, fungi, and protozoans. In arthropods, rhabdoviruses include significant insect-vectored pathogens such as vesicular stomatitis virus (transmitted by sandflies and black flies), sigma virus of Drosophila (a heritable infection affecting fly behavior and physiology), and numerous plant rhabdoviruses vectored by aphids, leafhoppers, and planthoppers. Many rhabdoviruses establish persistent infections in their arthropod vectors without pathology, enabling efficient horizontal and vertical transmission. The family encompasses 64 genera organized into four subfamilies, with diverse ecological roles spanning pathogenesis, host manipulation, and potential biological control applications.

Etymology

From Ancient Greek rhabdos (ῥάβδος), meaning 'rod' or 'staff', describing the cylindrical virion morphology.

Example

Sigma virus in Drosophila melanogaster exemplifies an arthropod-specific rhabdovirus that is maternally transmitted and confers sensitivity to carbon dioxide anesthesia, providing a classic genetic marker in fruit fly research while illustrating how rhabdoviruses can manipulate invertebrate host phenotypes without severe pathology.

Synonyms

• Rhabdoviridae

Related Terms

• Arbovirus
• mononegavirales
• negative-sense RNA virus
• vector-borne disease
• sigma virus
• vesicular stomatitis virus
• Transovarial transmission
• viral persistence

Usage Notes

Rhabdovirus (singular) and rhabdoviruses (plural) refer to members of the family Rhabdoviridae; the family name Rhabdoviridae is capitalized and italicized under formal taxonomic convention. The term is sometimes used loosely for any bullet-shaped virus, but precise usage restricts it to the established family. In entomological contexts, rhabdoviruses are distinguished from other arthropod-borne viruses (arboviruses) by their genome organization and replication strategy, though they share ecological transmission patterns with bunyaviruses and flaviviruses. Plant rhabdoviruses vectored by insects are sometimes termed 'plant rhabdoviruses' or specified by genus (e.g., nucleorhabdovirus, cytorhabdovirus) based on intracellular location.