Blue-green algae produce toxins that are hazardous to humans and can be fatal in animals, particularly dogs, said Deon van der Merwe, associate professor of diagnostic medicine and pathobiology. Blue-green algae, also known as cyanobacteria, grow in bodies of water, such as lakes and ponds, and other wet places, such as moist soil or rocks.
Kansas State University
Blue-green algae produce toxins that are hazardous to humans and can be fatal in animals, particularly dogs.
"Essentially anywhere there is water, you can find blue-green algae," said van der Merwe, who also manages the toxicology section of the Kansas State Veterinary Diagnostic Laboratory.
Blue-green algae develop when water has excess nutrients, which helps cyanobacteria grow rapidly and creates an algae bloom. Discolored water or algal scum can be signs of an algae bloom, which can last anywhere from a few days to several weeks. Cyanobacteria need sunlight to grow because they are photosynthesizing organisms, van der Merwe said.
"If there is a lot of sunshine and if the weather is warm, that makes it easier for them to grow rapidly," van der Merwe said. "That's why blooms occur most frequently in the summer, especially in drought conditions. Under drought conditions, you typically have many cloudless days and more sunlight reaching water."
Health problems can arise when animals and people come into contact with the various toxins produced by cyanobacteria. The most prominent problem involves a toxin called microsystin, which affects the gastrointestinal tract and liver, van der Merwe said. When animals are exposed to this toxin, they may experience vomiting or diarrhea. If the cyanobacteria exposure is severe, it can be lethal and cause liver failure in animals.
Although gastrointestinal problems and liver failure also are possible in humans after blue-green algae exposure, irritant effects are more common. Humans often experience skin rashes, sneezing, coughing, irritated eyes, running noses and conjunctivitis after blue-green algae exposure.
"If you go to a lake or pond and the water is green, it is important to avoid physical contact with that water," van der Merwe said. "If people swim or ski behind a boat and they inhale spray from behind that boat, those can also be situations in which people can be exposed."
Although blue-green algae affect all animals, they primarily affect dogs because of their behaviors, van der Merwe said. Dogs often roam around and seek out algal scums in the water or on the lakeshore. This is dangerous because even when the scum has dried, it still can maintain toxicity.
"If people suspect that their dog has been exposed and the dog starts to vomit, that is often the first sign you will see," van der Merwe said. "It is very important to get the dog to the veterinarian as soon as possible. It may be possible to do preventative treatment to stop the full development of the poisoning."
It's also important for pet owners to protect themselves from blue-green algae exposure, van der Merwe said. Pet owners should wear protective gloves when handling animals that have been exposed to blue-green algae.
"It is a risk for people as much as it is for animals," van der Merwe said.
Blue-green algae can affect other animals -- such as birds, deer, cattle, horses and other livestock -- that use open water. Cyanobacteria blooms can even cause massive fish die-offs, van der Merwe said. As the algae bloom goes through its normal cycle of blooming and dying, the millions of decomposing organisms reduce the levels of oxygen in the water, which can kill fish.
The Kansas State Veterinary Diagnostic Laboratory accepts water samples to test for blue-green algae. Samples can be dropped by the laboratory from 8 a.m. to 5 p.m. weekdays or shipped to the laboratory in an insulated box with a cold pack. The address for the Kansas State Veterinary Diagnostic Laboratory is 1800 Denison Ave., Manhattan, KS 66506. For more information, contact the laboratory at 866-512-5650 or visit www.ksvdl.org.
Read more at http://www.k-state.edu/media/newsreleases/jul13/algae72513.html
Deon van der Merwe, 785-532-4333, firstname.lastname@example.org
Pronouncer: van der Merwe is fon der mur-vuh
K-State Video News: Raw video footage is available for broadcast stations. Contact Lindsey Elliott at 785-532-1456 or email@example.com.
Deon van der Merwe | Newswise
Upcycling 'fast fashion' to reduce waste and pollution
03.04.2017 | American Chemical Society
Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...
Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...
The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
28.04.2017 | Event News
20.04.2017 | Event News
18.04.2017 | Event News
28.04.2017 | Medical Engineering
28.04.2017 | Earth Sciences
28.04.2017 | Life Sciences