Abstract: In particular this invention provides for spot-on compositions for the treatment or prophylaxis of parasite infestations in mammals or birds which comprise: (1) a composition comprising (A) an effective amount of a 1-phenylpyrazole derivative; and/or (B) an effective amount of a macrocyclic lactone antihelmintic or antiparasitic agent; (2) an acceptable liquid carrier vehicle; and (3) optionally, a crystallization inhibitor. The invention also provides for a method of treating parasitic infestations or for the prophylaxis of parasite infestations in mammals or birds which comprises topically applying to said mammal treating parasitic infestations or for the prophylaxis of parasite infestations in mammals or birds which comprises topically applying to said mammal or bird an effective amount of a composition according to the present invention.

Abstract: Method for eradicating fleas in domestic or accommodation premises of a domestic or laboratory mammal is provided. The method involves topically applying, at least monthly, to the domestic or laboratory mammal, a parasitically effective amount of compound of Formula I.

Abstract: In particular this invention provides for spot-on compositions for the treatment or prophylaxis of parasite infestations in mammals or birds which comprise:

Abstract: Disclosed is a process for using a compound according to formula (I) or formula (II) to prepare a mixture for the eradication of ticks in the living quarters of small mammals, especially cats and dogs. Said process consists in applying as needed to the animal or animals of the habitat concerned a topical formulation in sufficiently pesticidal quantities of a compound according to formula (I), or possibly formula (II), at monthly intervals.

Abstract: The invention concerns a method and a composition against parasites and particularly ectoparasites and, preferably also endoparasites of small mammals and in particular dogs and cats. The composition contains a compound (A) of formula (I) and a compound (B) consisting of an endectoparasiticide of the macrocylic lactone type.

Abstract: In particular this invention provides for spot-on compositions for the treatment or prophylaxis of parasite infestations in mammals or birds which comprise: (1) a composition comprising (A) an effective amount of a 1-phenylpyrazole derivative; and/or (B) an effective amount of a macrocyclic lactone antihelmintic or antiparasitic agent; (2) an acceptable liquid carrier vehicle; and (3) optionally, a crystallization inhibitor. The invention also provides for a method of treating parasitic infestations or for the prophylaxis of parasite infestations in mammals or birds which comprises topically applying to said mammal treating parasitic infestations or for the prophylaxis of parasite infestations in mammals or birds which comprises topically applying to said mammal or bird an effective amount of a composition according to the present invention.

Abstract: Methods for removing parasites and in particular ectoparasites of vertebrates, in particular of mammals, and compositions for the implementation of this method.Methods for removing parasites of vertebrates, and in particular arthropods, mainly insects and Arachnida, wherein an effectively parasiticidal amount of a compound of formula (I) ##STR1## in particular of fipronil, is administered to the animal via an administration route which makes possible systemic distribution and good absorption.