Cattle mortality attributed to the toxic cyanobacterium Cylindrospermopsis raciborskii in an outback region of North Queensland.
Three cows and ten calves were found dead near a farm dam on a cattle property at McKinlay in northwest Queensland, Australia.
At that time, the dam contained an algal bloom which was identified as a monoculture of the cyanobacterium C. raciborskii, Histological examination of the liver of a calf carcass showed signs consistent with poisoning caused by hepatotoxin.
The hepatotoxic alkaloid cylindrospermopsin was detected in material harvested from the dam (4.1 x 10-15 g cell-1) and in a pure culture of an isolate from the bloom (4.4 x 10 - 15 g cell - 1).
An extract of this material was lethal to mice after 24 h at an intraperitoneal concentration of 153 mg kg-1.
This appears to be the first report of animal poisonings attributed to the cyanobacterium C. raciborskii.
Mots-clés Pascal : Bétail, Toxicité, Mortalité, Voie orale, Pollution eau, Bloom, Foie, Cyanobacteria, Bactérie, Bovin, Artiodactyla, Ungulata, Mammalia, Vertebrata, Alcaloïde, Queensland, Australie, Océanie, Milieu eau douce, Lac artificiel, Effet polluant, Toxicologie, Toxine, Cylindrospermopsis raciborskii, Cylindrospermopsine
Mots-clés Pascal anglais : Livestock, Toxicity, Mortality, Oral administration, Water pollution, Bloom, Liver, Cyanobacteria, Bacteria, Bovine, Artiodactyla, Ungulata, Mammalia, Vertebrata, Alkaloid, Queensland, Australia, Oceania, Freshwater environment, Artificial lake, Pollutant effect, Toxicology, Toxin
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0327662
Code Inist : 002B03M03. Création : 16/11/1999.