Herpesviruses (a)Initial infection:chickenpox(varicella) Nerve cell in dorsal Latent root ganglion viral DNA Spinal cord Varicella-zoster virus (Human herpes virus 3) Viruses move up peripheral nerve 。Transmitted by the respiratory route Causes pus-filled vesicles Virus may remain latent in dorsal root ganglia Figure 21.10a• Varicella-zoster virus (Human herpes virus 3) • Transmitted by the respiratory route • Causes pus-filled vesicles • Virus may remain latent in dorsal root ganglia Herpesviruses Figure 21.10a