Flea Allergic Dermatitis

• Occurs in cats and dogs mainly
• Irritation caused by enzymes, anticoagulants and histamine-like substances
• Hypersensitivity to flea saliva may develop
• Young or small animals may suffer from aneamia
• Lesions normally in dorsolumbosacral region, caudomedial thighs, ventral abdomen, flank, neck (cats)
• Grossly:
  • Red papules and secondary excoriations