Veterinary Technician Practice Exam 2025 - Free Veterinary Technician Practice Questions and Study Guide

The symptoms described, specifically nasal discharge and a permanent head tilt in survivors, are primarily associated with Feline Calicivirus. This virus can lead to respiratory diseases in cats and is known for causing oral ulcers and increased salivation, alongside the nasal discharge.

A significant complication of Feline Calicivirus infection can include vestibular syndrome, which manifests as a head tilt, often caused by inner ear involvement or other neurological effects related to the virus. While Feline Herpesvirus can also cause similar respiratory symptoms, its primary complications often include conjunctivitis and corneal ulcers rather than permanent head tilt. Feline Panleukopenia primarily affects the gastrointestinal system and does not typically result in nasal discharge or neurological signs. Feline Leptospirosis is not a viral infection affecting cats in the same manner as the other mentioned viruses and is primarily associated with different clinical signs and zoonotic potential.

Thus, the association of permanent head tilt and nasal discharge clearly points to Feline Calicivirus as the causative agent in this scenario.