Eqvalan® (İvermectin) ve Equimax® (İvermectin + Praziquantel)`in Doğal Enfekte Atlarda Strongylidae Türlerine Etkileri (Efficacy of Eqvalan®(ivermectin) and Equimax® (ivermectin + praziquantel) Against Strongylidae Species in Naturally Infected Horses)