The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 1992
Filed:
Apr. 09, 1990
Wesley L Shoop, Somerville, NJ (US);
John R Egerton, Salida, CO (US);
Merck & Co., Inc., Rahway, NJ (US);
Abstract
A novel strain of Trichostrongylus colubriformis has the unique characteristics of being significantly resistant to the effect of antihelmintic drugs, in particular the antihelmintic drugs ivermectin and thiabendazole. The novel strain of T. colubriformis was prepared by the serial passage of the helminth through sheep. Twenty passages of the helminth through sheep were adequate to impart resistance to oral therapy of 20 times that normally expected with ivermectin. The highly resistant parasite is useful to screen for antihelmintic agents with different modes of action than that of ivermectin or thiabendazole which represent two of the three major classes of modern, broad spectrum anthelmintics.