Otitis

Majorities:
Disease of frequent presentation in the dog and the cat characterized by the inflammation of epitelio of the external auditory conduit and the auricular pavilion.
She is one of the most habitual diseases in the veterinary clinic being able to affect until a 20% of the canine population and to 6% of the feline population. In patogenia of the external otitis primary factors are distinguished causes of the otitis, and secondary factors that are the predisponentes factors and the perpetuantes factors and, in many occasions, are the confluence and sum of some of these factors which determines the presentation of the clinical signs.

Symptoms:
Inclined head and frequent shocks, pain in the zone, moderate prurito to severe, bad scent, inflammation, malhumor, even aggressiveness, exudation and piodermas of surface in the near region.

Primary causes:

* Strange bodies.
* Ectoparásitos (scabies: otodectes cynotis and others).
* Hipersensibilidades (atopia, nourishing allergy and others).
* Alterations queratinización (hipotiroidismo, idiopática seborrea).
* Autoinmunitarias diseases (THEM, pénfigos).
* Viral infections (moquillo)
* Idiopáticas.

Secondary causes:

* Predisponentes factors:
They cause that the animal is more susceptible to suffer of otitis but, in no, case, are direct cause of the inflammation. (humidity in the auditory conduit, high environmental temperature, iatrogénica irritation by solutions). Obstruction of the auditory conduit (neoplasia, polyps). Sistémicas diseases.

* Perpetuantes factors:
Secondary as a result of the primary cause and able to continue the inflammatory answer although the primary cause it has disappeared. (bacterial infections like Staphylococcus Proteus, Streptocccus Pseudomonas), fúngicas infections (Malasezzia, Innocent).