Nematodirusn.
/ˌnɛmətə(ʊ)ˈdʌɪrəs/, /nᵻˌmatə(ʊ)ˈdʌɪrəs/, U.S. /ˈˌnimədoʊˈdaɪrəs/, /ˈˌnɛmədoʊˈdaɪrəs/, /nəˌmædoʊˈdaɪrəs/; see also nemato- comb. form. Zoology and Veterinary Medicine.
A genus of nematode worms (family Trichostrongylidae) which are intestinal parasites of various mammals (esp. sheep and goats), causing disease particularly in lambs (see nematodiriasis n.); (also nematodirus) a nematode of this genus. Frequently attributive.
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the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Nemathelminthes > [noun] > class Nematoda > family Trichostrongylidae > member of genus Nematodirus
Nematodirus1957
1911 Science 14 Apr. 592/1 The eggs of Nematodirus are much more resistant to low temperatures than those of the stomach worms.
1915 Parasitology 8 146 The Nematodirus larvae are able to withstand complete desiccation.
1934 Jrnl. Agric. Sci. 24 207 Nematodirus larvae can regain the surface after being turned in by the plough.
1956 Vet. Rec. 21 July 471 (title) Some observations on nematodirus disease in Northumberland and Durham.
1957 A. Fraser & J. T. Stamp Sheep Husbandry (ed. 3) x. 384 Until recently the worm nematodirus was thought to be relatively harmless to sheep.
1963 Times 20 May 16/5 Forecasts could now be made of conditions likely to induce..fluke and nematodirus infections.
1997 Daily Tel. 1 Apr. 23/4 Most existing stomach worms in sheep were controlled by new anthelmintic drugs... The one exception was nematodirus, which found a new niche in which to thrive; it reduced strong grazing lambs to pitiful skeletons within days.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
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n.1911