Blackhead in Turkeys.

My question today is TURKEYS and BLACKHEAD.
About 7 years ago I started to raise meat turkeys. I was told they can not be in the same coop as chickens but head contact was ok. At about 5 weeks they started to venture outside the coop then I noticed a few whose wings were droopy and well their eyes looked like they were tired . Then the runny yellow poop started and then death in a day or two. Then I noticed a few more that had the same issues. In the end the flock was down to 4 from 8. I was not sure why they died but was told the poultry just die.
Next year same thing 8 out of 12 died with the same symptoms.
Next year same symptoms with heavy death toll even though I fed medicated feed.
Next year I built a new turkey coop away from the chickens.
At about 5 weeks again they showed signs of sickness. Took one to the vet and was told it has Blackhead. I then found out the medicated feed that I feed them was for coccossilious Not blackhead. I was given pills for the water and started to feed Blackhead medicated feed and all survived to make processing. . So now I have it beat or so I thought.
This season get 25 turkeys. At week 3 I found a dead one due to the heat lamp being knocked off the mount as they were trying to fly. The dead one had a broken neck due to the stick that was lying on the bird. Lesson learned.
Next day I noticed 2 were showing signs of blackhead but how can that be they have never been outside and their coop was disinfected. Next day they were both dead as well one more was showing signs. Today that was dead also. I started them on blackhead medicated feed and will have to see. Can some one please tell me what is going on?????

Blackhead is hard to stop. Once its in the ground...its there for several years. I was told by a professor at Perdue University...the best way to clear it is to burn the ground....heavily!!! Then Lime...like AG Lime..then sand. You need to keep ALL chickens away from the area where the turkeys are. If its in the ground...wow, thats hard. And I am sure thats where its coming from, the fecal poo of the worms. I too, almost lost a hen to blackhead...was able to treat her and saved her. However, this spring her reproduction organs prolapsed, and fell out. Wierd!! She is still alive, just now a good pet...altho she likes to set the eggs!

Thats the thing the poults didn't even get to the ground but yet they are dieing from it.

You stated you have them in a coop? What type of flooring do you use!? How did you " disinfect" it? I am in no way an "expert" just trying to help a little....if I can.

Ingestion is the only way they can get Blackhead, So they would have to have contact with fresh droppings infected with the protozoan, Eathworms or Cecal Worm eggs,,The blackhead organism does'nt live long outside of the bird, only inside the earthworm or in the cecal worm eggs can it be infective from one year to the next.
If They are on dirt eartworms/cecal worms are the culpirts, If on wire or dry shavings its possible flies are taking the histomonads or infected Cecal worm eggs into the coop

Plywood floor covered in Shavings . Can I be tracking Blackhead into the coop from my boots?