Changes

==Description==

==Description==

Eosinophilia refers to an increase in the number of [[Eosinophil|eosinophils]] present in the blood or tissues. This form of leucocytosis is most commonly associated with '''parasitism''' or [[:Category:Hypersensitivity|'''hypersensitivity''']] reactions, including the following diseases:

Eosinophilia refers to an increase in the number of [[Eosinophil|eosinophils]] present in the blood or tissues. This form of leucocytosis can be associated with '''parasitism''' or [[:Category:Hypersensitivity|'''hypersensitivity''']] reactions.

<u>'''Hypersensitivity Reactions'''</u>

==Hypersensitivity Reactions==

*[[Flea Allergic Dermatitis|'''Flea bite hypersensivity''']] is the most common cause of eosinophilia in cats and it may occur in animals with signs of miliary dermatitis. Food hypersensitivity reactions and [[Atopic Dermatitis|atopic dermatitis]] may also be variably associated with eosinophilia.

*[[Flea Allergic Dermatitis|'''Flea bite hypersensivity''']] is the most common cause of eosinophilia in cats and it may occur in animals with signs of miliary dermatitis. Food hypersensitivity reactions and [[Atopic Dermatitis|atopic dermatitis]] may also be variably associated with eosinophilia.

*'''[[Feline Eosinophilic Granuloma|Feline eosinophilic granuloma complex]]''' may be associated with blood or tissue eosinophilia. The eosinophilic ulcer form is rarely associated with systemic changes whereas eosinophilia is a near constant feature of the eosinophilic plaque. The linear granuloma is variably associated with blood eosinophilia.

*'''[[Feline Eosinophilic Granuloma|Feline eosinophilic granuloma complex]]''' may be associated with blood or tissue eosinophilia. The eosinophilic ulcer form is rarely associated with systemic changes whereas eosinophilia is a near constant feature of the eosinophilic plaque. The linear granuloma is variably associated with blood eosinophilia.

*'''[[Feline Asthma Syndrome|Feline asthma syndrome]]''', canine '''[[Pulmonary Infiltration with Eosinophilia|pulmonary infiltration with eosinophils (PIE)]]''' and equine '''eosinophilic pulmonary granulomas''' may all be associated with blood eosinophilia.

*'''[[Feline Asthma Syndrome|Feline asthma syndrome]]''', canine '''[[Pulmonary Infiltration with Eosinophilia|pulmonary infiltration with eosinophils (PIE)]]''' and equine '''eosinophilic pulmonary granulomas''' may all be associated with blood eosinophilia.

<u>'''Parasite Infection'''</u> - Both endo- and ecto-parasite infections may result in blood eosinophilia, in particular:

==Parasite Infection==

Both endo- and ecto-parasite infections may result in blood eosinophilia, in particular:

*''[[Aelurostrongylus abstrusus]]'', the feline lungworm.

*''[[Aelurostrongylus abstrusus]]'', the feline lungworm.

*''[[Dirofilaria immitis]]'' which causes heartworm disease.

*''[[Dirofilaria immitis]]'' which causes heartworm disease.

*Gastro-intestinal parasites including ''[[Toxocara canis]]'' and the other toxascarids of dogs and cats.

*Gastro-intestinal parasites including ''[[Toxocara canis]]'' and the other toxascarids of dogs and cats.

<u>'''Miscellaneous'''</u>

==Miscellaneous==

*The rare form of eosinophilic '''chronic myeloid leukaemia''' may result in the abnormally high production of eosinophils.

*The rare form of eosinophilic '''chronic myeloid leukaemia''' may result in the abnormally high production of eosinophils.

*'''[[Hypoadrenocorticism]]''' or Addison's disease may be associated with eosinophilia, a feature that may help to differentiate it from other diseases as such severely ill animals would usually be expected to have a stress leucogram.

*'''[[Hypoadrenocorticism]]''' or Addison's disease may be associated with eosinophilia, a feature that may help to differentiate it from other diseases as such severely ill animals would usually be expected to have a stress leucogram.