Rhabdoviruses are enveloped viruses with bullet-shaped particles that contain single-stranded RNA. They replicate by entering host cells and using their RNA polymerase to transcribe and replicate their genome. New virus particles then bud from the host cell. Rhabdoviruses can infect many species and are transmitted by arthropods or bites. Rabies virus causes fatal neurological disease in humans and other mammals by traveling along nerves to the brain. It evades immunity and commonly causes fear of water, paralysis, and death from respiratory failure. Diagnosis involves clinical evaluation, exposure history, and fluorescent antibody or PCR testing of brain or saliva samples.