Table 2.
Conditions leading to impaired immune function and resulting in increased risk of pneumonia
| Congenital | Acquired | |
|---|---|---|
| Innate | Primary ciliary dyskinesia Complement deficiency Leukocyte adhesion deficiency |
Bronchiectasis Secondary ciliary dyskinesia |
| Adaptive | Immunoglobulin deficiency Severe combined immunodeficiency |
Retrovirus infection (eg, feline immunodeficiency virus, feline leukemia virus) Endocrine or metabolic disease (eg, diabetes mellitus or hyperadrenocorticism) Chemotherapy and other immunosuppressive therapy Splenectomy |