Karenia brevis


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Karenia brevis

(kă-ren'ē-ă brev-is),
A dinoflagellate known for producing potent neurotoxins and accumulating in high concentrations in warm murine environments producing the phenomenon of red tide. The bloom of organisms may turn the water color red or golden; may reach a concentration of 20 million organisms per liter. Neurotoxin causes fish kill, or accumulation of toxin in shellfish (especially oysters, clams, and tiny mollusks called coquinas) and fish, resulting in ciguatera (fish poisoning) or paralytic shellfish poisoning (PSP). If lethal concentrations are ingested, death occurs within 12 hours as a result of respiratory and cardiac arrest. Aerosolized organisms along coastlines cause respiratory irritation resulting in coughing and worsening of asthma, and inflammation of the ocular, oral, and nasal mucous membranes, producing a burning sensation and tingling of lips and tongue. Saxitoxin, the paralytic shellfish toxin, and brevitoxin are some of the more common of the approximately 40 toxins produced and liberated by the dinoflagellate family.
Synonym(s): Gymnodium

Karenia brevis

(kă-ren′ē-ă brev′ĭs)
A marine dinoflagellate commonly found in red tides. It produces a toxin that can be irritating to the respiratory tract of animals when inhaled, or neurotoxic to humans when contaminated shellfish are eaten.
References in periodicals archive ?
For example, in graduate school, I studied the behavior of Karenia brevis. Every other marine species we looked at went up to the sunlight in the day and down to feed on nutrients at night.
That's an environmental ecological response to high nutrients." Scientists widely agree red tide, made up of Karenia brevis algae, gets seeded offshore at the bottom of the Florida shelf, then carried inshore by bottom currents.
This red tide is caused by a tiny algae called Karenia brevis, which produces an often-deadly toxin.
These include Blue Green algae or cyanobacteria (responsible for the current problem on the east coast of Florida) and "Red Tide" algae or dinoflagellates (such as "Karenia brevis" responsible for algal blooms in the Gulf of Mexico as well as "Alexandrium fundyense" causing red tides along the Atlantic Coast).
On parts of the Gulf Coast, periodic blooms of red tide (Karenia brevis) may kill fish and sometimes manatees with neurotoxins.
The organisms include microalgae Fragilariopsis cylindrus and Karenia brevis selected on the basis of reports claiming their unusual toxic metal homeostasis, some shellfish crayfish Orconectes limosus, bivalve Corbicula fluminea known for uranium bioaccumulation, and a model organism zebrafish Danio reiro.
The costs of respiratory illnesses arising from Florida Gulf Coast Karenia brevis blooms.
Effects of the dinoflagellate Karenia brevis on larval development in three species of bivalve mollusc from Florida.
Although reports of marine k-tAbs which include blooms of the dinoflagellates Karenia brevis and Alexandrium spp.
Entre las especies que se han reportado como productoras de toxinas en Mexico se mencionan a Gymnodinium catenatum Graham y Karenia brevis (Davis) Hensen et Moestrup, son atecadas o desnudas, y Pyrodinium bahamense var.
9:00 MICROARRY ANALYSIS OF KARENIA BREVIS GENE EXPRESSION PATTERNS IN RESPONCE TO SALINITY DIFFERENCES
In the fall of 2007, Sosik and Olson collaborated with biological oceanographer Lisa Campbell at Texas A&M University to deploy the device in the Gulf of Mexico to look for seasonal blooms of toxic algae called Karenia brevis. The algae accumulate in filter-feeding shellfish, making them dangerous for human consumption.