there are different anticoccidial drugs, and thus different mechanisms of resistance. For instance, induction of resistance is not the same at all concerning chemicals and ionophores. There might not be one single gene involved in genetic resistance to anticoccidials.
Ah, i see.. i forgot to explain that... thank's for remind me Dr. Jean-Michel
in my case, the drug is diclazuril. the information i got from Grief et al, 1996 paper "Intraspecific polymorphisms of Eimeria species due to resistance against anticoccidial drugs", i'am still looking a diclazuril mode of action and mechanism of resistance to... this paper taken in 1996 year and now is 2013. isn't there any studies about diclazuril resistance in 17 year ? i'am looking at internet but there isn't a single paper can explain that...
Wow, Idon't know. Maybe you should try to contact directly Gisela Grief, if she still works on the subject. Personnally, I saw nothing exciting concerning genetic resistance, probably because it is much more complicated than expected...