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'''For an overview of respiratory infections see [[Respiratory System Inflammation - Pathology|Respiratory system - inflammation]]'''
===Infectious agents===
[[Image:Tracheitis.jpg|right|thumb|100px|<small><center>Tracheitis (Image sourced from Bristol Biomed Image Archive with permission)</center></small>]]
*Inflammation of the trachea - tracheitis
*Tracheitis can occur as part of an extension of an upper or lower viral or bacterial respiratory infection
**eg: [[Respiratory Viral Infections - Pathology#Infectious bovine rhinotracheitis (IBR)|IBR]], [[Respiratory Viral Infections - Pathology#Feline viral rhinotracheitis|FHV-1]], [[Respiratory Viral Infections - Pathology#Equine rhinopneumonitis|EHV-1]], [[Orthomyxoviridae|influenza viruses]]
**eg: [[Bordetella bronchiseptica and Bordetella avium|''Bordetella bronchiseptica'']], [[Streptococci|''Strep. equi.'' subsp. ''zooepidemicus/equi'']], [[Pasteurella species and Mannheimia haemolytica|''Pasturella multocida'']]
*May cause
**Obstruction to airflow
**[[Lungs - inflammatory#Aspiration pneumonia|Aspiration pneumonia]]
*Acute inflammation passes through the same stages as [[Nasal Cavity Inflammatory - Pathology#Rhinitis|rhinitis]]
===Chronic polypoid tracheitis===
*In dogs and cats
*Secondary to chronic inflammation
=='''Infectious causes of tracheitis'''==
{| cellpadding="10" cellspacing="0" border="1"
| .
| [[Respiratory Viral Infections - Pathology|'''VIRAL''']]
| [[Respiratory Bacterial Infections - Pathology|'''BACTERIAL''']]
| [[Respiratory Fungal Infections - Pathology|'''FUNGAL''']]
| [[Respiratory Parasitic Infections - Pathology|'''PARASITIC''']]
|-
| '''Dogs'''
| [[Respiratory Viral Infections - Pathology#Infectious canine tracheitis|Infectious canine tracheitis]]
| secondary
| .
| [[Respiratory Parasitic Infections - Pathology#In Dogs|''Filaroides osleri'']]
|-
| .
| [[Respiratory Viral Infections - Pathology#Canine herpes virus|Canine herpes virus]]
| .
| .
| [[Respiratory Parasitic Infections - Pathology#Capillaria aerophila|''Capillaria aerophila'']]
|-
| .
| [[Respiratory Viral Infections - Pathology#Parainfluenza- 2|Parainfluenza- 2]]
| .
| .
| .
|-
| '''Cats'''
| [[Respiratory Viral Infections - Pathology#Feline viral rhinotracheitis|Feline viral rhinotracheitis]]
| secondary
| .
| [[Respiratory Parasitic Infections - Pathology#Capillaria aerophila|''Capillaria aerophila'']]
|-
| '''Horses'''
| [[Respiratory Viral Infections - Pathology#Equine influenza|Equine influenza]]
| [[Respiratory Bacterial Infections - Pathology#Streptococcus equi subsp. zooepidemicus|''Streptococcus equi subsp. zooepidemicus'']]
| .
| .
|-
| '''Cattle'''
| [[Respiratory Viral Infections - Pathology#Infectious bovine rhinotracheitis (IBR)|Infectious bovine rhinotracheitis]]
| subclinical [[Respiratory Bacterial Infections - Pathology#CAR bacillus|''CAR bacillus'']]
| .
| [[Respiratory Parasitic Infections - Pathology#In Cattle|''Dictyocaulus viviparus'']]
|-
| '''Sheep'''
| .
| subclinical [[Respiratory Bacterial Infections - Pathology#CAR bacillus|''CAR bacillus'']]
| .
| .
|-
| '''Pigs'''
| [[Orthomyxoviridae|Swine influenza]]
| .
| .
| .
|-
|}
'''For an overview of respiratory infections see [[Respiratory System Inflammation - Pathology|Respiratory system - inflammation]]'''