Changes

===Additional Tests===

===Additional Tests===

If clinical signs are suggestive of flea allergic dermatitis, demonstration of the presence of fleas or flea faeces will help confirm the diagnosis. Parting the hair and visually inspecting for fleas may be sufficient for this; alternatively a flea comb can be used. Material obtained by combing may be placed on a moistened, light-coloured paper- brown material will "bleed" on the paper if it is indeed flea faeces.

Diagnosis is usually made based on clinical signs an history, but is supported by evidence of fleas or flea dirt. This can be difficult to find, particularly in cats, but placing combed material on moistened light-coloured paper can help demonstrate flea dirt. Intradermal testing with flea antigen will give an immediate hypersensitivity reaction in 90% of allergic animals, and a delayed reaction can be seen in some animals not showing an immediate response. However, the response to a flea control programme is normally sufficient to rule the diagnosis in or out.

 

If doubt still remains over the diagnosis of flea allergic dermatitis, the response to a flea control programme will help rule the diagnosis out or in.

===Pathology===

===Pathology===