Definition Blastomycosis is a systemic fungal infection that usually originates in the lungs and then disseminates to order organ systems.
Etiology Blastomycosis is caused by dimorphic fungus Blastomyces dermatitidis. Infection usually occurs by inhalation of infection conidiophores from environment. Water plays important role in the spread of the disease.
Definition Flea bite hypersensitivity is a puritan dermatosis due to an immediate and/or delayed cell mediated response to several proteins present in flea saliva.
Etiology Hypersensitivity to ctenocephalides felis felis is probably the common cause skin disease in dogs and cats.
Definition Dermatophytosis is a fungal infection of the skin, hair or claw.
Etiology Dermatophytosis is caused by infection with species of keratinophilic fungi. In cats the fungus comonly implicated is Microsporum canis an in the dogs it is Microsporum canis, Microsporum gypseum and Trichophyton Mentagrophytes.
