2013年9月16日星期一

Dog Ear Infections blog



Treating dog ear infections comes down to correct diagnosis, cleaning the ear, treating the problem, then keeping the ear clean to prevent the problem in the future.
You need to take your dog to the vet first to diagnose the cause of the dog ear infection.  Sometimes, something else is going on, like a grass seed is in the dog’s ear, so this step is vital.  Sometimes the ear canal may be ruptured which is a totally different situation requiring more aggressive, yet careful and long-term treatment.

 Next, the ear must be cleaned so any medication used is effective: antibiotics don’t work if the ear is full of gunk.

Then the vet will likely prescribe an ear medication.  In most cases an ointment or drops with antibiotics, antifungals and antiinflammatories is selected.  In severe cases oral medications or injections may also be required.

Once the ear infection is under control, a long term treatment regime is instituted to help prevent ear infections recurring.


Learn more about Dog ear Infection Treatment 





Dog ear infections can drive a dog owner crazy!  It can seem like you just fix one dog ear infection and your dogs ears are getting itchy again.  If your dog keeps getting itchy, red, or painful ears, you need to learn how to prevent dog ear infections.  The first step is figuring out the cause of your dog’s ear infections.  Most dog ear infections are caused by a few common problems.  The good news is, you can prevent infections occuring by removing the predisposing factors.  You can even treat ear infections at home once you have ruled out more serious causes of ear infections.






Dog ear infections have many different causes.  Ear mite infections in dogs are one common cause of dog ear infections.

Dog ear mites are tiny parasites (smaller than you can see) which cause itching and irritation in your dogs ear, causing these symptoms of dog ear infections.  Ear mites are easy to treat, but getting the correct diagnosis from a dog vet and rruling out other causes of ear infections like yeast infections and bacterial infections is vital.  Remember early diagnosis and treatment of dog ear infections is the key to preventing complications.




Read about ear mites below




Ear Mites in Dogs 






Ear Mites in Dogs


What are Ear Mites?


As the name suggests, ear mites are a tiny spider like parasitic mite that infect the ears of dogs and cats.  They usually live in the ear canals but can live on other parts of the dog or cat’s body. Ear mites are the most commoncause of ear infections seen by vets. They are more commonly found in cats than dogs but are a considerable cause of ear infection in dogs too.


Some breeds of dogs are more prone to ear mite infections that others, especially dogs with long floppy ears. The ear mites thrive in the warm moist area where the air flow is restricted.


Ear mites feed on epidermal debris & ear wax.  They burrow into the ear, causing inflammation which the body responds to by producing more wax. 


What are the Symptoms of Ear Mites in dogs?


Ear mites are terribly uncomfortable for your dog. Imagine how it would feel having thousands of little bugs running around in one of your most sensitive areas. Usually the first symptom you notice will be your dog scratching his ears or shaking his head due to the extreme itchiness that the mites cause. His ears may be painful to touch and he may cry in pain when you touch them or while he is scratching them. He may rub his face along the ground trying to relieve the itching. You may also notice a foul odor coming from the ears.


Dogs may cause damage by scratching causing the ears to bleed. They may also shake their ears with such intensity that small blood vessels are broken and hematomas form.


Diagnosis of Ear Mites


If you have a look inside the ear of an infected dog you will see dark reddish brown or black debris throughout the ear canal which has been described as looking like coffee grounds. Ear mites are visible to the naked eye and can be seen as white dots among the dark debris. You may even see them moving around.


Your vet will look in your dogs ear with a magnifying instrument called an otoscope and may inspect the debris from the ear under a microscope for a more definite diagnosis. Ear mite infections can be serious if left untreated resulting in damage to the ear canals and eardrums and leaving deformity of the ears and possible deafness.


Secondary bacterial or yeast infections are also common so it is important to consult your veterinarian. Your dog may require antibiotics for secondary bacterial infections.



Treatment of Ear Mites. How do I Get Rid Of Ear Mites?


You can purchase ear mite treatments from your pet supply store or your vet will prescribe an oily insecticide to clean the ear canals. It is important to clean out all the gunky black stuff from the ear canal daily. You can clean this with a thin cloth or cotton balls dipped in olive oil. (or any other vegetable oil) The medication should then be massaged deeply into the dog’s ear taking care to get into all the nooks and crannies of the ear canal.This treatment should be continued for 2 weeks after the dog seems to be cured to ensure that all ear mites are killed as they progress through their life-cycle. 



Revolution is another option. It is a Parasiticide that is applied to the skin of dogs six weeks of age and older.  Revolution is used to prevent heartworm disease, kills adult fleas and prevents flea eggs from hatching and treats and prevents ear mite infestation. It can be purchased from your vet, from a pet supply store and online.


Are Ear Mites Contagious?


Ear mites are very contagious and can be passed on from dog to dog or dog to cat so it is important to treat all of your pets at the same time.


Can Humans Catch Ear Mites?


No, humans are not affected by ear mites.


 


 


This article has not been written by a veterinarian & should not be considered a replacement for a veterinarian visit. The articles are provided for informative purposes only. While great care has been made in the creation of these articles, we cannot guarantee the accuracy or omissions on these pages. If in any doubt whatsoever, seek professional medical advice from your veterinarian.







Dog ear infections can be very severe if neglected or treated incorrectlly.  For this reason you should always take your dog to the vet to have his ear checked thoroughly.  In some severe dog ear infections the eardrum (tympanic membrane) can rupture, resulting in spread of the infection into the middle ear.  This sounds painful and messy: it is.
Here are some great photos of the difference between a normal and a ruptured ear drum from a case study by the University of Pennsylvania Vet School


Read more about canine otitis externa



















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Walnut went for an ear flush guided by a video otoscope under general anesthesia 2 weeks later. 



The picture below on the left is of her tympanic membrane, which was ruptured in both ears.  Compare it to a normal canine ear drum seen on the right.  Both ears were flushed, along with the tympanic bullae, and bilateral middle ear cultures were taken for culture and sensitivity testing.     


                                        
Walnut’s left tympanic membrane, ruptured due to severe otitis                                                           Normal canine tympanic membrane                                   
externa leading to otitis media


                            Future Treatment Plan:

Continue oral antibiotics for an additional 8 weeks (change if necessary based on culture and sensitivity from the middle ear) combined with topical treatment of both ears .  If sensitivity reveals no effective oral antibiotic, treat via topical therapy alone for one month past resolution of external canal inflammation and negative cytology. 


Click on the button below to see results of Culture and Sensitivitiy from the middle ear.                                                                                             
 


Walnut was treated with oral marbofloxacin 5mg/kg SID (based on culture & sensitivity testing)  for 8 weeks post video otoscopic ear flush. 


Her topical regimen included:


                    Epiotic (acidifying/drying cleanser) – clean both ears every other day.
                    Silver Sulfadiazine (1%) – apply 1cc to both ears twice daily. 


Walnut’s otitis required 4 total months of therapy for complete resolution.  At the end of treatment, Walnut’s tympanic membranes had regenerated. Intradermal Allergy Testing (IDAT) was planned to definitively diagnose Atopy as the underlying cause of Walnut’s dermatological problems. The test will be performed in October (end of pollen season) to maximize positive allergen reactions.


 







Dog ear infections have many different causes and consequences, requiring different treatments.  Otitis externa (external ear infections) are most common.  If your dog is shaking his head or scratching his ears he may have a dog ear infection, and you should take him to see a vet to find the cause of the problem and get a suitable treatment.  
This video on otitis externa gives some vet advice on symptoms, diagnosis and treating ear infections.


Read more about treating dog ear infections.






Dog ear infections have many different causes and consequences, requiring different treatments.  Otitis externa (external ear infections) are most common.  All dog ear infections should be investigated by a vet as these different types (each with many different causes) cannot be differentiated without veterinary expertise and equipment.
This video on otitis externa gives some good advice on symptoms, diagnosis and treating ear infections.


Read more about treating dog ear infections.






Dog ear infections can have many different causes on consequences, often requiring different treatments.  Otitis externa (external ear infections) are most common, but otitis media (middle ear infections) and otitis interna (inner ear infections) also occur.  These latter two often result from chronic ear infections.  They are often much more difficult to diagnose and treat.  All dog ear infections should be investigated by a vet as these different types (each with many different causes) cannot be differentiated without veterinary expertise and equipment.
This article on diagnosing middle ear infections is technical as it is aimed at vets, but it gives some great photos of dogs with damaged and missing ear drums: a common finding in dogs with middle ear infections







Dog ear infections can be caused by many bacteria, yeasts and fungi.  This video of aspergillus ear infection shows what the inside of the ear can look like: this would require long term treatment with anti-fungals to resolve.   Many dog ear infections will heal with cleaning and an appropriate ear ointment.  

Read more about treating ear infections






Dog ear infections can cause pain and long term damage.  Check out this VetVid video on dog ear infections for advice on testing, diagnosis and treatment for your pet.

Read more about treating ear infections






Dog ear infections are categorised into three groups: external, middle and internal ear infections.  External dog ear infections (also called otitis externa) are the most common.  
This Information below explains the difference and gives some advice on management of chronic ear infections.




Hills Pet Nutrition Client Information Series: Otitis Externa, Media, Interna

What You Should Know About Otitis Externa, Media, Interna

The ear is divided into four parts: the pinna, which is that part of the ear outside the head; the external ear canal; the

middle ear, which is found on the inside of the eardrum; and the inner ear, which consists of tubes and nerve structures

that transmit sound to the brain. The inner ear also helps control your pet’s balance.

Animals with droopy ears and a great deal of hair in the ear canal seem to have the most problems with ear

inflammations. These characteristics plus the warmth and enclosed nature of the ear canal provide an excellent

environment for infective agents that cause inflammation.

Causes

Bacteria, fungi, and ear mites are common causes of ear inflammation in dogs and cats. Allergies, seborrhea, an

underactive thyroid gland, trauma, foreign objects (plant seeds, for example), and tumors also cause ear inflammation.

Otitis Externa, Media, Interna

Your pet has an inflammation of the external, middle, or inner ear. Ear inflammations are common in pets

and have many causes. Most ear inflammations can be treated successfully and specifically with medications

after appropriate diagnostic tests are completed. Surgery may be necessary for advanced cases. This client

education sheet will help you learn more about these inflammations and will review your veterinarian’s

instructions for your pet’s care at home.

Otitis Externa, Media,

Interna

History

Physical examination

Ear examination

Ear cultures

Thyroid hormone levels

Intradermal skin testing

X-rays

Therapeutic trials with

insecticides and

hypoallergenic diets

Therapeutic Plan

Removal of ear-canal hair

Ear cleaning

Topical application of

antibacterials/corticosteroids

Systemic antibacterials

Systemic corticosteroids

Surgery

Nutritional Plan

Nutrition based on individual

patient evaluation including

body condition and other

organ system involvement or

disease

Otitis Interna

Neurologic changes

Head tilt and circling

Inflamed inner ear structures

Otitis Externa

Inflamed,

reddened ear

Otitis Media

Inflammatory exudates

in the tympanic bulla

Partial occlusion of the

ear canal due to cellular

hyperplasia

Inflammatory exudate

Osteomyelitis due to the

infectious process

Most cases of middle ear and inner ear inflammation are caused by bacteria that pass through a ruptured eardrum.

One cause of a ruptured eardrum is overzealous cleaning of the ear canal. Throat infections may also cause middle ear

inflammations.

Diagnosis

Examination of the ear canal and eardrum by your veterinarian with an instrument called an otoscope helps determine

the cause. If the ear is very painful, your pet may need to be sedated for a thorough exam. Other tests include

microscopic examination of earwax; ear cultures; thyroid hormone studies; x-rays; surgical biopsy; and therapeutic trials

with parasiticides and hypoallergenic diets.

Treatment and Home Care

Disease of the ear must be treated persistently and specifically. Specific therapy includes parasiticides for ear mites,

thyroid hormones for an inactive thyroid gland, antibiotics for infections, anti-inflammatory medication and hypoallergenic

diets for allergies, and removal of foreign bodies and tumors. In some cases, therapy may need to be continued for six

weeks or longer.

In most cases, the ear will need to be cleaned by your veterinarian and the hair from the ear canal removed before

therapy will be effective. The use of medications to dry the ears is helpful. Surgery may be necessary if the ear canals

are closed, if tumors are present, or if fluid is present in the middle ear.

Home care usually includes administering medications directly into the ear canal. These medications should be

instilled into your pet’s ear(s) according to your veterinarian’s instructions. Once instilled, the medication should be

massaged gently into the ear canal. If you cannot give medications as directed, call your veterinarian. Failure to properly

administer ear preparations could lead to chronic inflammation.

Nutritional Plan

If your pet has an ear inflammation, your veterinarian may suggest a dietary change. Animals with suspected

allergies to food that result in skin and ear disease may benefit from a fixed-formula dietary product formulated from

nutrients to which they normally are not exposed. Such foods include Hill’s® Prescription Diet® Canine and Feline d/d®

and z/d. If your pet has had surgery to correct chronic ear disease your veterinarian may recommend a diet with

increased levels of protein and energy to assist in your pet’s recovery. Such foods include Hill’s® Prescription Diet®

Canine and Feline p/d®.

Transitioning Food

Unless recommended otherwise by your veterinarian, gradually introduce any new food over a seven-day period. Mix

the new food with your pet’s former food, gradually increasing its proportion until only the new food is fed.

If your pet is one of the few that doesn’t readily accept a new food, try warming the canned food to body temperature,

hand feeding for the first few days, or mixing the dry food with warm water (wait ten minutes before serving). However, do

not add water to your cat’s food. Feed only the recommended diet. Do not feed additional salt or any snacks that may

contain sodium. Be patient but firm with your pet.

Presented as an educational service by

Home Care Instructions

Client’s Name: _________________________________________________________

Patient’s Name: _________________________________________________________

Medication(s): _________________________________________________________

Nutritional Recommendation: ___________________________________________________

Follow-Up Appointment: _______________________________________________________ (Hospital Stamp Area Above)

REGULAR VISITS WILL HELP OUR VETERINARY HEALTH CARE TEAM PROVIDE FOR YOUR PET’S BEST INTEREST.

©2004 Hill’s Pet Nutrition, Inc.

®/™ Trademarks owned by Hill’s Pet Nutrition, Inc.



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