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Myiasis in dogs - Symptoms, worm extraction and treatment

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Care / Health 21 November, 2017 ->

Myiasis in our dogs: how to control and prevent infestation by fly worms

Myiasis in our dogs: how to control and prevent infestation by fly worms

When our dog has a wound and we don't realize it in several days, it can happen that the wound becomes very smelly and could even have worms.These worms are due to flies, mosquitoes or most diptera, which when perched on the wound lay their eggs, which when mature and feed on tissue become worms and then winged.

Next we will tell you everything you need to know about myiasis in dogs, symptoms, treatment and even the worm extraction procedure.

What is canine myiasis?

Myiasis, according to the literature, is diptera infestation (which has two wings). These insects, in their adult stage, take advantage of the holes or wounds of a host (in this case our dog) to deposit their eggs, which will continue their biological cycle thanks to the parasitized animal, where they feed on their tissues. This pathology can affect all types of mammals, in any region, especially during the wettest months of the year.

Types of Myiasis

There are different criteria to classify myiasis. In this opportunity we will catalog them according to their invasion process:

1- Primary invader: They penetrate the skin or take advantage of the holes in the body.

2- Secondary or tertiary invader: Take advantage of injuries and traumas.

The life cycle of dipterans and their development

Diptera that cause myiasis usually have different forms in their biological cycle, consisting of 4 stages: egg, larva, pupa and adult. The last two phases are not in the host (dog).

The larvae secrete an enzyme that damages the dermis (skin) and causes infection of the wound. If left untreated, the wound increases in size and a dark secretion appears, which attracts other dipterans, which also begin to lay their eggs, causing what is known as “Gusanera” or “bichera”, worms in the dog.

Symptoms of myiasis in dogs

There are different types of myiasis: cutaneous, cavitary, systemic and wound. Therefore, in some cases it can be more complicated to detect than in others.

It is also important to note that although we can initially detect a cutaneous myiasis, it can progress to become a systemic one, affecting different organs.

In the beginning you can see a small wound or sting, then it grows, causing an area without hair, forming a pustule which secretes a bloody fluid. This evolution of the lesion can cause, among others, the following symptoms:

- Skin irritation

- Skin lesions

- Worm movement

- Symptoms of anorexia (no appetite)

Treatment

If this process is not treated, that is, it is not cleaned, disinfected and antibiotics are not administered, the evolution can be disastrous, and even lethal to our beloved puppy. Always the treatment should be indicated and supervised by a veterinarian.

The worms must be removed from the wound by a clamp, it is important to try not to cut them. Prior to this you should always shave the area with wounds and worms. After cleaning and treating the wound it will be covered with a bandage, in order to keep it clean and avoid re contamination with more larvae.

Finally, it should be noted that the use of antibiotics, fluid therapy and other measures that the veterinarian considers appropriate according to the case evaluation may be necessary. Likewise, different visits to the specialist may be required to perform a second worm extraction, sanitation of the area or topical application.

Can myiasis be transmitted to humans?

Yes, since as we said before, myiasis can affect any mammal, this is why if your dog has myiasis, you must take all the necessary precautions: Cover your wounds, avoid moisture, use disinfectants and keep the area fumigated to avoid Diptera

How to prevent it?

Keeping a good level of hygiene, including brushing and bathing the dog, we can quickly identify this problem, which will prevent more serious complications. Likewise, we will strictly follow the deworming Internal and external of our puppy.

It is always recommended go to the veterinarian, before the appearance of any symptom before mentioned, such as excessive scratching, compulsive licking of the skin or any abnormality.

What is canine myiasis?

Hope (1840) was the first to use the word "myiasis"to define a diptera infestation, at that time in human beings. Later, Zumpt (1964) detailed the description of myiasis, suggesting that insects spent some time in the host while feeding on body fluids or food ingested by it.

These insects, in their adult stage, take advantage of the holes or wounds from a host to deposit their eggs, which will continue their biological cycle thanks to the parasitized animal. However, it may happen that certain species are able to penetrate through the intact dermis. This pathology can affect all kinds of Vertebrate animals, in any region, especially during the wettest months of the year.

Clinical point of view:

  1. Traumatic myiasis: Megaselia rufipes, Chrysomyia albicans, Phormia regina, Calliphora spp, Lucilia spp, Sarcophaga spp and Wohlfahrtia magnifica.
  2. Ocular myiasis: O. ovis, R. purpureus, M. scalaris, W. magnifica and S. carnaria.
  3. Atrial myiasis: O. ovis, and W. magnificent.
  4. Nasal, buccal and sinus myiases: W. magnifica, Sarcophaga carnaria, Calliphora vomitoria, Oestrus ovis, and Rhinoestrus purpureus.
  5. Anal and vaginal myiasis: W. magnifica, S. carnaria and Sarcophaga hemoroidalis.

Player Behavior:

  1. Mandatory or specific myiasis: parasitic dipterans that necessarily need a host for development in their larval stage.
  2. Semi-specific myiasis and accidental myiasis: in this case we talk about dipterans that parasitize corpses or decomposing organic matter. It may happen that opportunistically invade a living tissue.

The cycle of v>

Diptera that are susceptible to causing myiasis usually have different forms in their biological cycle, going through a complete four-stage metamorphosis: egg, larva, pupa and adult. The last two phases do not live in the host.

The larvae secrete an enzyme that can damage the dermis and cause different health problems. If left untreated, the wound increases in size and a dark secretion appears, which causes many other dipterans to be attracted and also begin to lay their eggs, causing what is known as "gusanera" or "bichera", worms in the dog.

Is there any kind of predisposition?

Any animal that do not have adequatesanitary control is susceptible to myiasis, therefore, animals abandoned, sick, convalescent or have a constantly moist dermis will be more predisposed. Acral lick dermatitis could be an example of the latter case.

Symptoms of myiasis in dogs

There are different types of myiasis: cutaneous, cavitary, systemic and wound. Therefore, in some cases it can be more complicated to detect than in others. In addition, in the case of cutaneous myiasis, we can observe several classes: forunculoid, rampant, traumatic and snake.

It is also important to note that although we can initially detect a cutaneous myiasis, it can progress to become a systemic one, affecting different organs.

In the early stages of myiasis We can observe a small sting, injury or abscess in the dermis. Generally in an area without hair. Later we will observe how the wound grows, a pustule begins to form and it releases a serous or bloody fluid. Pay attention to all these symptom:

  • Ulcers
  • Boils
  • Skin irritation
  • Skin lesions
  • Worm movement
  • Edemas
  • Fever
  • Intense itching
  • Ear movements
  • Pain
  • Discomfort
  • Scratching
  • Excessive licking
  • Diarrhea
  • Anorexy

At this point (and if not treated) the larvae can penetrate the deepest layers of the dermis, forming nodules, or simply create a much larger abscess. This whole process involves the appearance of a serious infectious process and even a shock.

Diagnosis

By a simple physical exploration The professional will be able to diagnose myiasis in the dog and, because of the rapid development of the larvae, the use of the microscope is not necessary. It will also be important for the veterinarian to perform a laboratory analysis request.

Treatment of myiasis in dogs

The treatment of myiasis in dogs should always be performed under the supervision of a veterinarian. These small carnivorous "worms" in dogs can cause secondary pathologies, so you should never try to cure myiasis without visiting the specialist.

The first step to treat myiasis in dogs will consist of the general hygiene of the area, for example with the use of physiological serum, although some specialists can go directly to the extraction of the larvae and subsequently wash the wound.

Use of antiparasitic drugs and hygiene

After removing fly larvae, the veterinarian will shave the affected area to prevent bacteria or eggs from remaining in the fur and dermis. After applying a antiseptic solution, the vet remove dead tissue to promote healing of the skin.

A local antibiotic andcurabichera (a product that is also known as "matabichera" or "antigusanera") in spray or paste, applied directly on the wound, until it is completely covered. Finally, the affected area will be covered with a bandage, to keep it clean and avoid possible environmental contamination, which will help to heal faster.

Finally, it should be noted that the use of antibiotics, fluid therapy and other measures that the veterinarian considers appropriate according to the case evaluation may be necessary. Likewise, different visits to the specialist may be required to perform a second worm extraction, sanitation of the area or topical application.

Can myiasis be transmitted to humans?

As we have explained above, myiasis can affect any vertebrate animal, so, myiasis can be transmitted to humans.

People who live in a home with a dog suffering from myiasis should take certain precautions in order to avoid possible parasitization. It will be essential to monitor any wound and cover it, perform daily hygiene baths, the application of products or creams that prevent moisture or the use of insect repellents. We will pay special attention in the case of having babies, sick or elderly people In the home.

Canine Myiasis Prevention

Although myiasis is not a frequent problem in large cities, it can be more common in rural areas or affect dogs that regularly go to rivers and forests. It will be enough with regularly check the dermis of the can, paying special attention to hairless areas.

Keeping a good level of hygiene, including brushing and bathing the dog, we can quickly identify this problem, which will prevent more serious complications. Likewise, we will strictly follow the deworming internal and external can.

It will also be very important go to the specialist before the observation of some symptom mentioned above, such as excessive scratching, compulsive licking of the skin or any abnormality.

Are there home remedies for worms in dogs?

Due to the complications that myiasis can lead to, it is not advisable to use any kind of home remedy To treat this pathology. Likewise, it is not necessary to use any remedy if the prevention advice mentioned in the previous section is followed.

This article is purely informative, at ExpertAnimal.com we have no power to prescribe veterinary treatments or make any kind of diagnosis. We invite you to take your pet to the veterinarian in case he presents any type of condition or discomfort.

If you want to read more articles similar to Myiasis in dogs - Symptoms, worm extraction and treatment, we recommend that you enter our section of parasitic diseases.

How Miasis dogs acquire

The flies of the genus Dipera usually look for a living host where they can lay their eggs so that when they hatch, the larvae can feed on it until they become adults. They generally look for vertebrate animals, so dogs, cattle or even humans become their main objective.

This type of flies take advantage of the weakness of certain areas of dogs to deposit their eggs, mainly wet areas such as parts of the skin that remain wet for different reasons, wounds or cavities.

Any dog ​​is prone to suffer from myiasis since there is no completely effective treatment or repellent, so to protect them we must perform reviews on our dog and see if he suffers from any of the common symptoms in myiasis.

Types of myiasis in dogs

There are several types of myiasis in dogs, from cutaneous myiasis to myiasis of the ear, nose, mouth or even anus. Being the most frequent cutaneous myiasis, especially when the dog has an open wound. There may even be cases of subcutaneous myiasis, where the larvae can feed under the dog's skin, even reaching its organs.

    Cutaneous myiasis: The Díperos take advantage of her> Symptoms of Myiasis in dogs

Also known as gusanera or bichera because it leaves the larvae of the fly, small worms that feed on the dog's tissue, myiasis has very obvious symptoms when it originates in the skin but little noticeable when it originates in certain cavities of the body of our dog.

Therefore, in case of any suspicion it is essential to go to a veterinarian, who, thanks to his training and experience, will be able to verify whether it is Miasis or any other type of parasitic infection. The most noticeable symptoms in myiasis in dogs are:

  • Formation of boils on the affected skin or cavity
  • Appearance of larvae, small worms
  • Ulcers and edemas on the skin that do not heal
  • Itchy intense anus (plurito)
  • Fever
  • Constant scratching, discomfort
  • Diarrhea or even significant weight loss

If you appreciate one or more of these symptoms in your dog, even if you seem to see that something similar to a worm moves under your skin, do not hesitate to go to your veterinarian urgently.

Treatment to cure myiasis and home remedies

It will be the veterinarian who evaluated the status and severity of myiasis infection to extract the worms from the dog and put a medication-based treatment, such as Ivermectin. Most dogs respond positively to treatment although if the infection is very serious, they can lose their lives.

As it is a very serious parasitic infection, we do not recommend under any circumstances to apply home remedies or treatments without veterinary supervision. Since it is complex to eradicate myiasis and we can harm our dog instead of helping him. It is also a very painful disease, do not play a doctor.

How to prevent our dog against myiasis

The best prevention is to examine our dog periodically, especially if he has wounds or lives in rural settings, where it is easier to remain wet or with parts of his skin constantly wet.

We always recommend doing a weekly routine check on our dog, examining his nails, eyes, ears, skin and hair, etc ... If during the review we appreciate something that seems strange, we should consult with our veterinarian to make sure that it is nothing serious.

It is our responsibility to take care of our dog's health and a routine weekly check will only rob us ten minutes of our precious time.

Is myiasis contagious?

Yes, myiasis can be spread to other animals and even humans. That is why it is very important to detect and treat it with the care and medications that the veterinarian indicates. If our dog has myiasis, it can spread to other dogs and humans.

If an animal (cattle) suffers from myiasis, it can also infect our dog. Myiasis is very contagious since larvae always look for a host to feed on, their survival depends on it. In Youtuve you can find many videos about Miasis in dogs, but we do not recommend watching them because they contain very impressive images.

Remove the larvae

The first thing to do is take some tweezers. It will be the tool for worm extraction, hands should never be used! Before putting the clamp in contact with the pet, it must also be disinfected - Well with water or with physiological serum. Once the larvae begin to be removed with laboriousness, we must put all the will into not breaking them (this process would be very complicated).

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