Is the Flesh-Eating Screwworm a Threat to Our Pets?

Mary Simpson
by Mary Simpson

While we all breathed a little easier thinking that this recurrence appeared to be strictly a farming issue located hundreds of miles south, it’s not quite as remote as one might think.

(photo credit: Gorodenkoff / shutterstock.com)

So, is the Screwworm a threat to our pets? The short answer is yes. And here’s why.


Whether you follow the news or not, it’s hard not to have heard about this flesh-eating insect that invaded the cattle industry several weeks ago. Since the first 15 cases were reported by cattle farms in Texas and New Mexico, we now learn that goats, sheep and even a dog have been impacted by this subtropical parasite.


What is a Screwworm?

According to ScienceNews, it’s a blowfly that lays eggs into the open sores of any mammal it so chooses. So yes, pets are vulnerable. As it transitions into a hook-mouthed maggot, it burrows deep into the animal’s flesh, which can be painful and result in serious infections. The difference between a Screwworm and a regular maggot is that the Screwworm feeds on living flesh, while the maggot feeds on dead or decaying flesh.


Can Humans Be Impacted?

It’s very unlikely for a human to become an unknowing host to a screw worm. Simply because the burrowing process would be immediately noticed and treated with antibiotics. So, a full recovery is relatively easy to achieve. And it’s the same for any animal, once the wound has been identified and treated.


Why Are They Back?

Originally eradicated in the United States over 40 years ago, the Screwworm has re-emerged, and some put it down to global warming. With temperatures rising as you shift further north, what was once a subtropical parasite has now found it possible to thrive north of the South American border.


Another theory is that the previous treatment used to eradicate them more than 40 years ago involved sterilizing the male flies. Because the females only mate once, the eggs laid would not be viable. Since that time, facilities have shut down not only due to the success of the program but also the costs associated with a threat that was now dormant.


Now that they’re back, the U.S. Food and Drug Administration has jumped on it with emergency use authorizations for drugs that have been known to shut down the spread. And they’ve expanded the treatments to include animals ranging from not only livestock but cats, dogs, birds, and even wild animals.


What To Do If You Suspect Your Pet is Infected.

You’re going to need to involve your veterinarian in the process because it requires the use of oral and/or topical parasiticides to ensure anything beneath the visible surface, has been killed.


These will include options such as NexGard or Credelio, as well as Nitenpyram, known as Capstar, which will effectively eliminate anything you can’t easily see.


Your pet’s wound will then need to be thoroughly flushed with antiseptics and wound sprays that have been FDA-approved to kill the larvae.


After the wound has been cleared of active larvae and eggs, your pet will need to take antibiotics to help resolve any secondary bacterial infections, as well as pain management for the open wound.


Mary Simpson
Mary Simpson

Sharing space with three seriously judgy Schnoodles and 2 felines who prefers to be left alone. #LivingMyBestLife

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