a skin-infecting species of filaria parasitic in cattle and transmitted by the horn fly, Haematobia irritans; the only species known to occur in the U.S.; characterized by a row of spines behind the mouth of the adult worm, which is 6–8 mm in the female, 2–3 mm in the male. Both adults and larvae are found in granulomatous skin lesions in cattle, usually on the underside of the abdomen.
[G. stephanos, crown, + filaria]
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Examples: glitazone, GI cocktail, etc.