UNASSIGNED: By means of parasitological necropsies, the present study aimed to evaluate, in six experiments, the degree of susceptibility or resistance of different helminth species which naturally infect @entity1641 to @entity3070 0.2mg/kg, @entity51861 0.2mg/kg, moxidectin 0.4mg/kg, @entity11546 35mg/kg, @entity3070 0.2mg/kg+ @entity2039 2.5mg/kg, @entity51861 0.2mg/kg+ @entity2039 2.5mg/kg and @entity3070 0.2mg/kg+6.6 mg/kg @entity19839 . At experimental day zero, the @entity1641 were allocated to treatment groups based on average counts of strongylid eggs per gram of feces (EPG) obtained on days -3, -2 and -1. Oxyuris sp. infections were confirmed as positive or negative. All the animals in the six experiments were naturally infected by this helminth species. Each group (control or treated) consisted of six animals. All the assessed Habronema muscae populations analyzed were susceptible to @entity3070 , @entity51861 and @entity30635 . Of the six @entity8955 populations, four were susceptible to @entity3070 , @entity51861 , moxidectin, @entity11546 and @entity3070 + @entity2039 , and two were resistant to @entity51861 + @entity2039 and @entity3070 + @entity19839 . Both Strongyloides westeri populations analyzed were susceptible to @entity3070 , @entity51861 , moxidectin and @entity51861 + @entity2039 . For O. equi, resistance was found in four different populations treated with @entity3070 , @entity51861 , moxidectin, @entity11546 and @entity3070 + @entity2039 . Only combinations of @entity51861 + @entity2039 and @entity3070 + @entity19839 were effective against this parasite species. All the large strongyles diagnosed in the present study (Strongyus edentatus, @entity6248 and Triodontophorus serratus) were susceptible to all the chemicals tested, with the exception of @entity11546 . Of the Cyathostominae populations, one was diagnosed as resistant to @entity3070 and another to @entity11546 . The remaining populations from this @entity2199 group were considered to be sensitive to @entity3070 , @entity51861 , moxidectin, @entity3070 + @entity2039 , @entity51861 + @entity2039 and @entity3070 + @entity19839 . New studies should be performed in different regions to evaluate the efficacy of @entity11546 in others field populations of helminthes.

Susceptibility of helminth species from XXXX against different chemical compounds in Brazil.

@entity3070 :: ('MESH:D007559', 'Chemical') :: ['ivermectin'] @entity1641 :: ('9796', 'Species') :: ['horses'] @entity8955 :: ('40349', 'Species') :: ['Trichostrongylus axei'] @entity2199 :: ('6239', 'Species') :: ['nematode'] @entity51861 :: ('MESH:C048324', 'Chemical') :: ['abamectin'] @entity11546 :: ('MESH:D014236', 'Chemical') :: ['trichlorfon'] @entity30635 :: ('MESH:C027837', 'Chemical') :: ['moxidectin'] @entity19839 :: ('MESH:D011715', 'Chemical') :: ['pyrantel'] @entity2039 :: ('MESH:D011223', 'Chemical') :: ['praziquantel'] @entity6248 :: ('MESH:D016112', 'Disease') :: ['Strongyus vulgaris']
@entity1641 :: (9796,Species) :: ['horses']
