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Published on: August 24, 2021
Catecholamines during development of the parasitic nematode, Haemonchus contortus
1Helminthic Diseases Laboratory, Livestock and Poultry Sciences Institute, United States Department of Agriculture, Beltsville, MD 20705.
Abstract:
1. Catecholamines from infective larvae of Haemonchus contortus were extracted, separated on HPLC, and measured on an electrochemical detector. DOMA 18 ng/100,000 larvae: NE 6 ng: E 1 ng: DA 1 ng 2. Levels of norepinephrine decreased below detection level rapidly after gassing with CO2. 3. Levels of 3,4-dihydroxymandelic acid (DOMA), a metabolite of norepinephrine, increased when exsheathment took place in tap water rather than buffer.
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