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unclassified Oesophagostomum
nematodes
Nucleotide Protein
Oesophagostominae
subfamily, nematodes
Rhabditomorpha
infraorder, nematodes
Rhabditina
suborder, nematodes
Haemonchidae
family, nematodes
Chromadorea
class, nematodes
Metastrongylus
genus, nematodes
Metastrongylidae
Chabertiidae
Oesophagostomum
Ascaridoidea
superfamily, nematodes
Strongylidae
Strongyloidea
(lungworms), superfamily, nematodes
Trichostrongylus
Trichostrongylidae
Haemonchus
Spirurina
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