Also known as cyanobacteria
Potentially toxic cyanobacteria, or blue-green algae, may form dense blooms in fresh water bodies. This may be seen as a thick green coat or scum within the upper water layer and surface. Blooms are mainly a problem in late summer and autumn. They are associated with nutrient over-enrichment due to factors such as animals defecating and urinating in the water or fertiliser run-off. Many blooms are not toxic, but all should be considered potentially so. A range of cyanobacterial genera and species have been described including Microcystis aeruginosa and Anabaena circinalis. Different cyanobacteria may produce hepatoxins and/or neurotoxins.
Affected animals may be found dead. Clinical signs due to neurotoxins may include: muscle tremor, staggering, salivation, hyperaesthesia, diarrhoea and recumbency. Clinical signs due to hepatotoxins may include: anorexia, dehydration, jaundice, hypersensitivity or stupor, photosensitivity and recumbency.
Diagnosis is based on the visible presence of an algal bloom in animals’ drinking water confirmed by microscopic examination for blue green algae.
Days of the week test is conducted
Monday – Friday
Up to 5 days
Microscopic examination for blue-green algae
Water and scum
THIS TEST IS CURRENTLY OUTSOURCED
1 Turnaround times are provided as a guide only. For specific information about your submission please contact Customer Service.
|Water and scum|
Microscopic confirmation of the presence of cyanobacteria indicates the possibility of cyanobacterial poisoning, but does not confirm that the bloom is toxic.