Introduction
- Pharyngitis is often a part of upper respiratory and/or alimentary inflammation
- May cause
- Obstruction to airflow
- Aspiration pneumonia
- Acute inflammation passes through the same stages as in rhinitis
- In pigs, foreign material may lodge in the posterior diverticulum of the pharynx and cause inflammation, potentially perforation (also accidental in sheep during drenching) and fatal cellulitis
- Inability to swallow due to the swelling may also be fatal
- In young thoroughbred horses equine chronic pharyngitis and lymphoid hyperplasia occurs due to chronic exposure to infection
Infectious causes of pharyngitis
| . | VIRAL | BACTERIAL | FUNGAL | PARASITIC |
| Dogs | Canine distemper | secondary | . | . |
| . | Parainfluenza- 2 | . | . | . |
| Cats | Feline viral rhinotracheitis | secondary | . | . |
| . | Feline calicivirus | . | . | . |
| Horses | Equine rhinovirus | Strangles | . | . |
| . | Equine influenza | Glanders | . | . |
| . | Equine rhinopneumonitis | . | . | . |
| . | Equine viral arteritis | . | . | . |
| Cattle | Infectious bovine rhinotracheitis | secondary | . | . |
| . | Parainfluenza- 3 | Necrotic laryngitis | . | . |
| . | Bovine adenovirus | . | . | . |
| Sheep | . | . | . | . |
| Pigs | Inclusion body rhinitis | Atrophic rhinitis | . | . |
| . | Swine influenza | . | . | . |