How to treat a dog bacterial skin infection

Skin Infections in Dogs

What Are Skin Infections in Dogs?

Skin infections are conditions that are caused by infectious organisms such as bacteria, fungi, or parasites. All areas of skin can be affected, including inside the ears and nose, as well as the hair and nails.

The severity of the disease depends on the type of infection and can vary from very mild to painful and itchy. Some organisms that cause skin infections are transmissible (or contagious), which means the infection can be passed to another mammal through direct contact or the environment. There are also infections that are caused by organisms that normally live on the skin and are not considered contagious.

Types of Skin Infections in Dogs

• Bacterial

• Fungal

• Parasitic

• Viral

Symptoms of Skin Infections in Dogs

• Redness

• Bumps or raised areas of the skin

• Itchiness (you may see your dog scratching, licking, and/or chewing the skin)

• Scales or flakes

• Crusts or scabs

• Hair loss (alopecia)

• Oozing or discharge (blood, pus, clear)

• Skin color changes (darker or lighter)

Causes of Skin Infections in Dogs

There are many causes of skin infections in dogs. Some infections are primary infectionsan infection directly caused by an infectious organism. Other infections are secondary infections and occur because of an underlying disease process that triggers an infection.

Primary Infection

Scabies is an example of a primary parasitic skin infection. Dogs acquire scabies by direct contact with an infected animal. The scabies mite then causes the clinical signs associated with the disease. Ringworm is an example of a primary fungal infection and is acquired due to contact with infected individuals or an infected environment, including soil.

Secondary Infection

A common example of a secondary skin infection is one due to skin allergies. The allergies cause inflammation of the skin, which then provides an environment favorable to organism growth. Bacteria or fungi that normally live on the skin are then able to multiply, leading to a bacterial or fungal skin infection.

How Veterinarians Diagnose Skin Infections in Dogs

There are several basic skin tests that are useful in diagnosing a majority of skin infections. The most common ones are:

• Skin scrapes: A dull scalpel blade is used to scrape the top layer of the skin; effective for finding skin parasites like demodex.

• Skin cytology: A sample is collected by pressing a microscope slide directly to the skin lesion or via a needle and syringe and then looked at under the microscope for bacteria, fungi, or abnormal skin cells.

• Tape preps: Clear tape is used to collect a sample of hair or skin to find bacteria, fungi, or parasites when viewed under the microscope.

• Cotton swabs: A cotton swab is used to collect a sample, most often from inside the ear, to diagnose bacterial, fungal, or parasitic infections.

• Cultures: A sample of skin, hair, or discharge is collected onto a growth plate to look for bacterial or fungal growth over time. This test can also be used to learn which antimicrobial medication is best to treat the infection.

Treatment of Skin Infections in Dogs

The treatment of a skin infection depends on the type of infection, the location of the infection, and the condition of the dog. Bacterial skin infections are treated with oral (by mouth) antibiotics, and/or topical products such as medicated shampoos, conditioners, sprays, and ointments. Common products include:

Fungal infections are treated similarly, with antifungal medications, and parasites are treated with antiparasitic medications.

To help the skin heal and to prevent future infections, other treatments are used to support healthy skin. For example, when treating an ear infection, special ear cleaners are used in addition to the antimicrobial medication. Omega-3 fatty acid supplementation is another treatment used to help resolve and prevent infections. Prevention is often the best medicine and regular bathing and grooming can be helpful for not only treating skin infections but also preventing them from occurring in the first place.

For secondary skin infections, it is important to treat the primary cause of the secondary infection. Skin allergies, for example, frequently require medications to reduce inflammation and allergic reactions. Treating a skin infection without treating the allergy will likely lead to another infection. Food allergies require special diets to reduce skin inflammation. If a food allergy is suspected, your vet will work with you to determine an appropriate food trial,to slowly remove certain ingredients and introduce possible allergies to determine the culprit.

Recovery and Management of Skin Infections in Dogs

The time it takes to treat a skin infection depends on the type of infection, the ability to treat primary causes of the infection, and the severity of disease. Sometimes the most difficult part of the treatment is sticking with treatments for as long as needed.

Some skin infections can be difficult to treat because of antimicrobial resistance. Antimicrobial resistance occurs over time, when microbes develop defenses against our medications, making those medications ineffective. In those cases, treatment can take longer and may require further testing.

Infections can resurface, especially if the primary cause of the infection has not been treated or resolved. Dogs with chronic conditions such as allergies or other diseases are more likely to have repeat infections.

Managing skin infections successfully can be complicated, time consuming, and expensive. Following your veterinarians recommendations closely and being patient during the treatment period is important for resolving the infection and preventing recurrence in your pup.

Featured Image: iStock.com/Sergeeva

WRITTEN BY

Dr. Rania Gollakner

Veterinarian

Rania Gollakner received her Doctor of Veterinary Medicine degree in 2010 and a Master of Public Health in 2017. She practiced companion...

Skin Infections in Dogs: Bacterial Infections

Symptoms of Skin Infection in Dogs

Clinical signs associated with a skin infection in dogs can vary depending on the specific cause, but early manifestations of the skin condition can be similar regardless of the cause. Commonly seen symptoms are itchiness, hair loss, and generalized discomfort. Skin flaking and crusting can also be seen in some cases of skin infection.

Generalized redness, erythema, and skin inflammation can also be observed in dogs with skin infections. Untreated and severe cases will eventually emit a pungent or foul odor, and can even be fatal to highly susceptible and immunocompromised animals.

Types of Skin Infection in Dogs

Skin infection in dogs can be generally classified into 2 types: bacterial and fungal. Several bacterial and fungal species can invade and penetrate the skin barrier and cause infection in canines. Inflammation and breaks on the skin barrier can increase the risk of these microorganisms taking over, leading to an infection.

Its important to determine what type of skin infection an affected animal has because the treatment for both types is different. Medications that can control and eliminate bacterial organisms will have no effect against fungal infections, and likewise, anti-fungal medications are ineffective against bacterial skin infections.

Proper identification and diagnosis are important to have a specific and targeted treatment for your dogs skin infection.

Common Bacterial Skin Infection Causes in Dogs

Pyoderma is the most common bacterial skin infection in dogs. This bacterial skin infection is characterized by the presence of purulent (pus-like) discharge from the skin and is commonly caused by several species of bacteria.

Pyoderma in dogs is differentiated based on the tissues of the skin involved in the disease. Infections that only affect the topmost layers are called superficial pyoderma, and pyoderma that infiltrates and infects the deeper layers of the skin are called deep pyodermas. Superficial pyoderma accounts for the majority of pyoderma cases in dogs.

Most superficial pyoderma cases occur spontaneously and often present with a localized skin lesion. Loss of hair, or alopecia, is typically seen in superficial pyoderma cases, along with erythema (redness) and purulent discharge. Superficial pyoderma lesions tend to cause severe discomfort and will result in affected dogs trying to scratch or bite on the lesions, making the condition worse. The most common bacteria that causes this type of pyoderma is Staphylococcus pseudointermedius.

Deep pyodermas, on the other hand, usually have a triggering cause. Oftentimes, deep pyodermas result from untreated superficial pyodermas. Some cases of deep pyoderma are caused by the same bacterial species, but other organisms like E. coli, Proteus sp., and Pseudomonas sp. can also cause infection. Deep pyoderma cases affect the deeper portions of the hair follicle which results in erythema, hyperpigmentation, swelling, and skin ruptures. Affected areas of the skin are often painful and swollen.

Diagnosing & Treating Bacterial Skin Infections in Dogs

As mentioned, treatment for skin infections in dogs will ultimately depend on proper identification and diagnosis. The best way to diagnose skin infection in canines is through skin cytology, bacterial and/or fungal culture, and identification. Several methods like skin scraping, smear biopsy, and acetate cytology have proven effective in determining whether a skin infection is bacterial or fungal in nature. Identification of specific bacterial or fungal causes will involve culturing and isolating the bacteria taken from skin samples.

Most bacterial skin infections respond well to antibacterial medications. Localized and solitary bacterial infections can easily be treated with topical medications such as antibacterial creams and ointments. A more generalized infection will often need systemic antibacterial therapy for treatment.

Similarly, fungal infections are mostly treated with topical medications such as ointments or medicated shampoos, depending on how widespread the lesions are. Systemic antifungal medications are usually only prescribed in severe cases of fungal skin infections because of their potential liver and kidney side effects.

Read more:

Skin Infections in Dogs: Fungal & Yeast Infections

Common Skin Parasites in Dogs

My Dog Wont Stop Licking His Paws - Help!

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Dog Skin Infections: How To Spot The Signs & When To Seek Treatment

Is your dogs irritated skin giving you cause for concern? Youre not alone. Dogs are extremely prone to skin problems. In fact, skin conditions are the second most common ailment that dog parents face when seeking veterinary care.¹ We have had personal experience with skin issues in dogs before, too.

If your dog is itching or licking incessantly, has crusty dog skin conditions, or has patches of skin that dont look normal, your dog could have a skin infection. Find out what to look out for when its time to see your vet and other need-to-know information about skin infections.

Primary Causes Of Dog Skin Infections

There are two main types of skin infections in dogs: yeast and bacteria infections. Both yeast and bacteria normally reside on your dogs skin, but when something irritates them, they can proliferate, causing an infection. Many things can cause yeast and/or bacteria to multiply, but here are some of the most common causes:

• Excessive licking, chewing, or scratching
• Allergies to environmental factors, like pollen, dust, dust mites, mold, etc.
• Food allergies

As a pet parent, it can be difficult to determine whether your dog is suffering from a bacterial or yeast skin infection because symptoms can often be very similar. But well break down each type to help give you a better idea of what your dog may be experiencing.

Also, its fairly common for dogs to have both a yeast and bacterial skin infection simultaneously. So, keep in mind that its wise to seek veterinary attention if you suspect a skin infection because treatment can differ depending on the infection type(s).

Yeast Skin Infections

Yeast dermatitis, also called Malassezia dermatitis, is caused by the fungusMalassezia pachydermatis. Its an extremely common cause of skin infections in dogs. Yeast infections arent contagious. Although yeast infections can appear anywhere on a dogs body, some areas are especially prone: ears, skin folds, paw pads, or other hot, humid areas of the body.

Dogs with atopic dermatitis (allergic dermatitis) are more susceptible, as are immunocompromised dogs. An immune deficiency makes it hard for a dogs body to fight off yeast infections, resulting in chronic and recurring infections. Dogs who are taking steroids or antibiotics can also be more prone to yeast infections.

Predisposed Breeds

Some breeds are also genetically predisposed to developing yeast or fungal skin infections, including:

• Australian Terriers
• Basset Hounds
• Bulldogs
• Chihuahuas
• Cocker Spaniels
• Dachshunds
• Lhasa Apsos
• Maltese Terriers
• Poodles
• Pugs
• Shetland Sheepdogs
• West Highland White Terriers

Chronic conditions like yeast infections and skin diseases that require frequent vet visits and medication can drain your bank account. But, if you have one of these breeds thats prone to this ailment, you might consider investing in pet insurance from an early age (before a condition presents and becomes pre-existing). It is a great way to manage this risk along with other health and accident situations you and your pet may find yourselves in. Learn more about Pet Insurance.

Symptoms

The most prominent symptoms are excessive itching and inflamed skin, but other common symptoms of skin conditions include:

• Itching and redness
• Smelly skin
• Crusty, flaky skin
• Thickened skin
• Sores
• Sticky or yellow/green discharge
• Greasy coat
• Hyperpigmentation (darkly pigmented skin)
• Recurring ear infections

Treatment

Treatment for dog yeast skin infections depends on the severity of the infection. Its important to consult your vet so you can get a proper diagnosis and treatment.

Oral Treatment

In more severe or chronic cases of skin yeast infections, your vet may prescribe oral anti-fungal medications, including ketoconazole, itraconazole, and fluconazole.

Topical Treatment

You can use home remedies to treat cases of yeast infections that arent severe (just make sure you get a vets diagnosis first). Medicated shampoos are the best way to treat skin yeast infections. However, some dogs with especially oily or greasy skin may require an initial shampoo with Davis Benzoyl Peroxide Shampoo (or another pet shampoo containing benzoyl peroxide or selenium sulfide), which can help eliminate the excessive oil.

After you cut down the oil and grease, use an anti-fungal shampoo containing chlorhexidine, miconazole, or ketoconazole. We recommend KetoChlor Medicated Shampoo for dogs and cats.

• Make sure the anti-fungal shampoo stays on your dogs skin for at least 10 minutes.
• Dry your dog thoroughly after bathing with a clean towel.
• Repeat every three to five days until theres no sign of infection (this can take anywhere from 2 to 12 weeks).

Bacterial Skin Infections

A bacterial skin infection in dogs, also referred to as pyoderma or bacterial dermatitis, can occur in any breed or age, but older dogs are more susceptible due to a weaker immune system. Dogs with hypothyroidism are also more susceptible.The most common dog bacterial skin infection is a staph infection.

Symptoms

As we said above, some of the symptoms of bacterial skin infections are very similar to yeast infections. But there are some differences.

• Excessive scratching, licking, or chewing
• Red and inflamed skin
• Papules or pustules (pus-filled lesions on the skin that resemble human pimples)
• Dry or flaky patches of skin
• Patchy fur loss or bald patches
• Circular crusts that look like ringworm

Our Personal Experience With Bacterial Skin Issues On Dogs

One winter, my dogs skin became very red and itchy. A trip to the vet led us to discover it was a staph infection caused by skin allergies. Her dry skin was flaking off, and she had a bump on her belly that looked like a zit, which the vet said were both signs of a staph infection. She was prescribed an antibiotic and steroid, which helped immediately. Our vet said staph infections are the number one condition she sees during the winter months.

Kimberly Alt, rescue dog mom & Canine Journal pet insurance expert

Treatment

Dog skin infection treatments are similar for bacteria as they are for yeast.

Oral Treatment

In many cases, veterinarians prescribe an oral antibiotic to treat skin bacterial infections. Amoxicillin,cephalexin, andclindamycin are common prescriptions for this type of infection. It may be necessary for your vet to do a skin culture and antibiotic sensitivity test to make sure he prescribes the most effective antibiotic.

Thetypical treatment time is a minimum of three to four weeks, but in recurrent or chronic cases of infection, oral treatment can last as long as 12 weeks.

Topical Treatment

Although most cases require oral antibiotics, your vet may recommend a topical treatment if your dogs infection is mild. This can include antibacterial shampoosandsprays that you apply once or twice a week for three to four weeks.

You can also use these topical treatments in addition to antibiotics to help your dog recover from his infection more quickly.Its also important that your dog has clean, dry, and padded bedding.

Are Allergies The Culprit?

If your dog is frequently itchy or has recurring skin infections, allergies could be the reason. As we mentioned above, its important to consult your vet to properly diagnosis any skin allergiesyour dog is having. But you can also learn more about which foods and environmental factors could be causing your dog problems by giving him anat-home dog allergy test kit.

10 Home Remedies For Dog Skin Irritation

There are some home remedies you can try to alleviate symptoms and support your dogs skin health. Keep in mind that these remedies are not substitutes for professional veterinary care, especially if the infection is severe or doesnt improve with home treatment. Always consult with your veterinarian before trying any home remedies. Here are some suggestions:

1. Regular Baths: Keeping your dog sanitary is important for managing skin infections. Use a mild, veterinary-approved shampoo that wont irritate the skin further. Be sure to rinse thoroughly to remove all shampoo residue.
2. Apple Cider Vinegar: Apple cider vinegar has natural antibacterial and antifungal properties. Dilute it with water (one part vinegar to one part water) and use it as a rinse after bathing your dog. Do not apply it to open wounds or raw skin as it may sting.
3. Coconut Oil: Coconut oil has moisturizing and antibacterial properties too. Apply a thin layer of organic, virgin coconut oil to affected areas to soothe the skin and potentially help fight off infections.
4. Oatmeal Baths: Oatmeal can help soothe itchy and irritated skin. Grind plain, uncooked oatmeal into a fine powder and add it to your dogs bathwater. Alternatively, you can use colloidal oatmeal products specifically formulated for dogs.
5. Honey: Raw, unpasteurized honey has natural antimicrobial properties. Apply a thin layer of honey to affected areas (avoiding the dogs eyes and mouth) and let it sit for about 10-15 minutes before gently rinsing it off.
6. Probiotics: Probiotic supplements or plain, unsweetened yogurt containing live cultures can help support your dogs immune system and promote healthy skin from the inside out.
7. Herbal Soaks: Some herbs, such as calendula, chamomile, and lavender, have soothing and anti-inflammatory properties. You can brew these herbs into a tea, let it cool, and use it as a skin rinse for your dog.
8. Aloe Vera: Aloe vera gel, especially when pure and free of additives like alcohol, can help soothe irritated skin. Apply a thin layer of aloe vera gel to the affected areas.
9. Keep the Area Clean & Dry: Moisture can exacerbate skin infections, so if your dog has long fur, consider trimming it to improve airflow.
10. Proper Diet: A balanced diet rich in essential nutrients, vitamins, and minerals is crucial for maintaining healthy skin and a strong immune system. Ensure your dog is receiving high-quality, nutritionally complete food.

Remember, while these home remedies may offer some relief for mild skin infections, they are not a substitute for professional veterinary care. If your dogs skin infection is severe, persistent, or worsening, its essential to consult with a veterinarian for proper diagnosis and treatment.

How Can I Soothe My Dogs Skin Irritation?

If your dogs skin is itchy and painful, you may want to consider using a CBD topical product to alleviate his symptoms (with your vets okay). CBD topical treatments are all-natural and could help soothe your dogs skin without interfering with prescription meds. Weve reviewed the best CBD oil companies, many of which carry topical CBD skin ointments or creams that can help soothe irritated skin until it clears up.

Why Trust Canine Journal?

Sally has over 20 years of experience in human health sciences communications, including 10 years as an expert on pet health conditions and treatment. Shes also spent over a decade researching pet insurance as part of an expert team at Canine Journal. As dedicated canine professionals and long-time dog owners, we test and research the best pet products, not only for our own pups but for all of our readers.

Sources: [1] Healthy Paws

Tagged With: Allergies, Skin