Fig. 3From: Sex differences underlying orofacial varicella zoster associated pain in ratsThermal and mechanical hypersensitivity increased after inoculating the whisker pad with VZV. Male Sprague Dawley rats were injected with either MeWo cells or MeWo cells infected with 1900 pfu/μl VZV. Testing was performed for 50–51 days post injection. Testing was completed using the orofacial test module from Ugo Basile. Thermal testing (panel a) was completed at 45 °C and filament testing (panel b) was performed with a custom circular opening containing 12 filaments. Fewer seconds drinking is an indicator of greater hyperalgesia or allodynia. Asterisk indicates a significant difference (p < 0.05) between the MeWo and VZV (pOka) treatment groups. There were 10 animals per treatment group and values are the mean and SEMBack to article page