title: Resistance of ruminal microorganisms to supermethrin.
abstract: The effect of the pyrethroid insecticide supermethrin on the growth and cyanogenic activity of 8 ruminal bacterial species (S bovis A0 24/85, S xylosus 310, E faecium 2, L plantarum, M elsdenii 4MJ, S ruminantium A17, B succinogenes 16J and B ruminicola 3/3) in pure culture was examined. Bacteria grown in 0.66 and 6.6 mg supermethrin/ml had similar growth rates and resistance to supermethrin. Production of cyanide from supermethrin occurred by all examined strains of ruminal bacteria, but the enzyme activity varied considerably with species and with the supermethrin concentrations.
authors.affiliation: Institute of Animal Physiology, Slovak Academy of Sciences, Kosice, Czechoslovakia.
authors.forename: P
authors.initials: P
authors.lastname: Javorsky
authors.forename: E
authors.initials: E
authors.lastname: Rybosova
authors.forename: Z
authors.initials: Z
authors.lastname: Mayerova
authors.forename: H
authors.initials: H
authors.lastname: Mlynarcikova
authors.forename: J
authors.initials: J
authors.lastname: Legath
mesh_terms: D000818:Animals; D001421:Bacteria, Anaerobic / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism; D003486:Cyanides / Q000378:metabolism*; D004352:Drug Resistance, Microbial; D006868:Hydrolysis; D007306:Insecticides / Q000378:metabolism / Q000494:pharmacology*; D011722:Pyrethrins / Q000378:metabolism / Q000494:pharmacology*; D012417:Rumen / Q000382:microbiology*
chemical_list: D003486:Cyanides; D007306:Insecticides; D011722:Pyrethrins; C017160:cypermethrin