Ostertagia
noun
Os·ter·ta·gia
ˌäs-tər-ˈtā-j(ē-)ə 
: a genus of slender brown nematode worms of the family Trichostrongylidae that are parasitic in the abomasum of ruminants
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“Ostertagia.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Ostertagia. Accessed 11 Jul. 2025.
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