ian youyr totally wrong mate most of these are not as you say antibiotics , the come into the cattegory of antimicrobial's and these groups of treatments are protozoicide's ,NOT antibiotics (amoxycillin,ampicillin,chloramphenicol,erythromycin,gentomycin,lincomycin,neomycin,penicillin,quinolone,spectinomycin,spiramycin,streptomycin,tetracyclines,tiamulinand tylosin) these are antbiotics .I have a book as well mate so you can stop with the know it all thing mr vet