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found in a dogs neck during surgery. Please help!

found in a dogs neck during surgery. Please help!
dog was flown in from Philadelphia, Pennsylvania, USA
July 23, 2007
Size: 1 inch long 1/2 inch thic
I am a veterinary technician and a 10 week old puppy presented with an abcess in it's neck. The owner said it had gotten it like that when it had come off the plane. During surgery we found this in it's neck. There were no signs of entry, and it was very much alive.

This picture is taken about one hour after we had taken it out. It was in formalyn for about 30 minutes before it died. It looks slightly brown here, but when it came out it was more white and a little more puffy. I have additional pics if you wnat them. I opened it up and only saw what looked like entrails of some sort. Any help would be greatly appreciated. I have absolutely no idea how this would get in there.

bot fly larva
The photo is really crummy, but what else could it be? Check on bot flies, as see if it doesn't answer the case.

I had thought that bot flies
I had thought that bot flies had black "legs" on their sides, that made them painful to endure? Also don't bot flies surface to breathe? I'm not an expert, I'm just trying to clarify.

Bot flies.
The larvae of many, but not all, bot flies have an array of spines designed to anchor them firmly in the host. Do they need air? Not necessarily. There are stomach bots that live in the stomach lining of horses for example. That this was in a dog, in its neck, is something I would think of as highly unsual, however. Where had the dog been? The "human bot fly" could well afflict a dog as well, but that is a neotropical fly.

Bot Flies? (original poster)
I am sorely inept when it comes to bugs, but how does a larve work? Does it metamorphasise (sp) into a fly? Or is this like a caccoon? Does it feed off of the host or use it as a place to hang out until it is ready to change? It did in fact have very very tiny "hairs" at each section that all faced down, like they would help it to burrow. By the way, I also found I was wrong about the place. It came from Ohio. Not philadelphia. I am sorry the pic is so bad, camera phones you know. I can speak with the client and have them e-mail me the pictures they took with their digital camera. They also have pictures of what it looked like after I had disected it. Although I don't know how much it would help.

One last thing - There was no known point of entry when we first saw the dog. The skin was smooth and only the lump was apparent. No wound or hole to speak of.

I can't tell you all how much I appreciate this. I am well aware bugs make the world go round.

more info on bot flies
Look here on wikipedia. Yes, the bot fly larvae (such as you probably found) emerge from the host, pupate, and then become adult flies.

You all are exactly right. That is what we pulled out of the dog's neck - for sure. Thank you so much for your time.


human bot flies larvae
my name is rose and I live in Chicago Illinois,a couple of weeks ago our janitor Sergio came to me with a disturbing sight on his back and a worm he pulled out of this hole on it in a jar,he had no idea what it was but I told him he was bit by a bot fly and this was its larvae! I had seen this before in animals in Tennessee but never heard of them biting a human here!anyone else ever hear of this in this area? i'm mortified!

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