Parasite identification help

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: I need help identifying a parasite. Under the scope, they are what I refer to as fast movers.Freely moving and squeezing through passages, in a constant state of movement. : They're tiny, even under 100 x 1.25 magnification. : They look like little ovules with a small : flagellate tail that doesn't seem to be used for locomotion. It looks as if the little guys are covered with cilia, which is used for locomotion. : Here's the big stumper. They infected ( assumed ) a cornsnake : ( unknown to me, first victim ), and within 5 days of displaying a non-interest in food, the animal was found dead. : ( Otherwise healthy ) A second animal, Cal King began displaying the food refusal, but no parasites could be located in the stool. The animal resumed normal feeding after 4-5 days : and began regurgitation within 48 hours after consuming the food items. This time the parasite was located in very large quantities in the direct stool smear. 2 days later the cal : king was observed to be suffering a blotting and some respiratory distress. Discharged nasal mucus was also observed under the scope. Once again very large numbers of the : same parasite could be found within the mucous of the animal. : Treatment with Flagyl ( 50 mg per kg ) was started 3 days ago, without any reversal of the : symptoms. : I'm unfamiliar with this parasite that seems to be attacking the mucous membrane of the animals, both the digestive tract and respiratory tract. : I really screwed up. I believe I introduced this disaster via an imported animal that I was looking at to purchase. I didn't purchase the animal, nor did the animal get within 15 miles : of my collection, BUT, I did use one of my large feeding tweezers to pick the animal up. I later realized that I didn't sterilize those tweezers when I returned home with them. I : know the odds weren't too great for the parasite transfer, but it is the only source I can think of. : That animal later died !!!!! ( A tree viper which later displayed respiratory distress prior to death ) : Should I use a higher dosage of Flagyl ? : What is this parasite? : Any input will be greatly appreciated. : Ivomectin ??? : Please e-mail me.

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