Medical Terms That Sound Like A Diagnosis But Really Are Not: Otitis

Infections are one of the most common causes of inflammation. It is always important to determine what type of infection you’re dealing with.

But things are not always as simple as that.

Let’s say your dog was diagnosed with otitis.

Otitis is often used as a synonym for an ear infection, though the word really stands for inflammation of the ear. Infection, however, is usually involved.

The most common type of ear infection is “otitis externa” where the infection and inflammation is limited to the outer ear canal. You might have noticed a bad odor or discharge, redness or swelling, head shaking, scratching or rubbing at the ears …

The  infection can be bacterial, fungal or parasitic (ear mites).

You don’t want a treatment based on an assumption; you want to know for sure what the cause is because the treatment is different for each type of infection.

Now the question is what caused the infection in the first place.

A one-time infection can have a simple cause and might not come back after appropriate treatment.

For example, a bacterial infection could have been caused by a foreign body (e.g., a grass awn or Foxtail) or trauma that disrupts the normal protective mechanisms of the ear. (Of course the foreign body must be removed for the infection to go away).

A yeast infection might follow after antibiotic treatment of bacterial otitis.

When he was grading our papers, our English professor would always say, “One mistake – no mistake,” and give an A on a paper with just one error.

Chronic cases, however, are a different story.

In some dogs, the anatomy of the ear itself can make it susceptible to infections. Think Cocker Spaniels with their floppy ears – cute, but they trap dampness and debris inside making them virtual Petri dishes for infection.  With some extra care, owners can often manage these types of situations.

However, ear infections can be secondary to other conditions, such as allergies or other systemic diseases!

Dogs suffering with allergies are also susceptible to ear infections. In fact, recurring otitis can be the first warning sign of an allergy problem.

Some hormonal imbalances also lead to frequent infections, including otitis.

For example, Cushing’s disease (hyperadrenocorticism) is caused by overproduction of the hormone cortisol. High cortisol levels suppress the immune system and make dogs more susceptible to infections.

As you can see, as medical and definitive as the term otitis might sound, it requires further qualification and in recurring cases warrants  additional investigation for an underlying cause.

It’s your dog’s health!
Jana

Further reading:
External Ear Infection (External Otitis) in Dogs
Ear Infections (Otitis Externa) & Ear Cleaning in Dogs
Ear Infections (Otitis Externa)
Can allergies cause my dog’s ear infection?
Ear Mites FAQ 

Related articles:
Phoenix’s Chronic Ear Infections
Medical Terms That Sound Like A Diagnosis But Really Are Not (Part I)
Medical Terms That Sound Like A Diagnosis But Really Are Not: One-thing-or-anotheritis

Ear Infections in Dogs « Animal Medical Hospital Blog – Charlotte, NC

How common are ear infections in dogs?

Infection of the external ear canal is one of the most common types of infections seen in dogs. It is called otitis externa. Some breeds, particularly those with large, floppy or hairy ears, are more prone to ear infections, but ear infections may occur in any breed.

What are the symptoms of an ear infection?

Ear infections are painful. Many dogs will shake their head and scratch their ears trying to get the debris and fluid out. The ears often become red and inflamed and develop an offensive odor. A black or yellowish discharge commonly occurs.

Since these symptoms usually mean an infection, why can’t I just get some ear medication?

There are several kinds of bacteria and at least one type of fungus which commonly cause ear infections. Without knowing the kind of infection present, we do not know which medication to use. In some cases, the ear infection may be caused by a foreign body or tumor in the ear canal. Treatment with medication alone will not resolve these problems. It is important that your dog be examined to ensure that the eardrum is intact. Administration of certain medications can result in loss of hearing if the eardrum is ruptured. This can only be detected by a thorough ear examination by your veterinarian.

How are ear infections treated?

The results of the otoscopic and microscopic examination usually determine the diagnosis and course of treatment. Cytologic study of debris from the ear canal determines which drug to use. Many dogs will have more than one type of ear infection present (e.g., a bacterium and a fungus, or two kinds of bacteria). This situation usually requires the use of multiple medications or a broad-spectrum medication.

How important is it to treat an ear infection?

Dogs with ear infections are miserable. Their ears are a source of constant pain resulting in head shaking and scratching. Head shaking and scratching can also cause broken blood vessels in the ear flap called an ear hematoma, which requires surgical treatment. Chronic ear infections can penetrate the eardrum and result in an internal ear infection and permanent hearing loss.

Make sure to speak to your veterinarian if you think your dog is exhibiting signs of an ear infection.

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