n with Herpes Simplex Virus Type 1 Infects Enteric Neurons and Mucosal Nerve Fibers within the Gastrointestinal Tract in Mice R. M. OESSER,12* AND S. C. KOOI Division of Allergy, Itnnuutology. and Infectious Diseases, The Children's Hospital of Philadelphia,' and The Wistar Institute,' Philadelphia, Penns