Abstract: The present invention provides a novel triazine derivative of the formula wherein ring A is an optionally substituted aromatic group which be; X is an oxygen or sulfur atom; R1 and R6 are each a hydrogen atom or an optionally substituted hydrocarbon residue or heterocyclic group which may bound through a hetero-atom; R2 and R3 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen or sulfur atom, or taken together, represent ═S; R4 and R5 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen, nitrogen or sulfur atom; R1 and R2, and R5 and R6, may each bind together to form a chemical bond; provided that where ring A is a phenyl group having at least a halogen atom in position-2 or 4 and X is an oxygen atom, R4 and R5 do not conjoinedly represent a chemical bond and an antiprotozoan composition containing the same or salt thereof.

Abstract: The present invention provides a novel triazine derivative of the formula ##STR1## wherein ring A is an optionally substituted aromatic group; X is an oxygen or sulfur atom;R.sup.1 and R.sup.6 are each a hydrogen atom or an optionally substituted hydrocarbon residue or heterocyclic group which may bound through a hetero-atom;R.sup.2 and R.sup.3 are each independently a hydrogen atom, a halogen atom, or a group bound through a carbon, oxygen or sulfur atom, or taken together, represent .dbd.S;R.sup.4 and R.sup.5 are each independently a hydrogen atom, a halogen-atom, or a group bound through a carbon, oxygen, nitrogen or sulfur atom;R.sup.1 and R.sup.2, and R.sup.5 and R.sup.6 may each bind together to form a chemical bond; provided that where ring A is a phenyl group having at least a halogen atom in position -2 or 4 and X is an oxygen atom, R.sup.4 and R.sup.5 do not conjoin to form a chemical bond, or a salt thereof.

Abstract: A method for prophylaxis or treatment of protozoal disease which comprises administering to domestic animal a plant component having antiprotozoal activity in combination with an ionophore antibiotic is disclosed. The method is safe and economical, and gives the excellent effect to protozoal disease, so that it is useful for the poultry and the live-stock industry.

Abstract: Novel purine derivatives of the formula: ##STR1## wherein R.sup.1 is hydrogen or alkyl of 1 to 3 carbon atoms, R.sup.2 is alkyl of 1 to 3 carbon atoms or allyl, and R.sup.3 and R.sup.4, respectively, mean halogen, and their acid addition salts are provided. These compounds have anticoccidial activity and are useful for treating caecal and/or intestinal coccidiosis in poultry and domestic animals.