Florida's coastal waters are currently clear of the red tide organism, Karenia brevis, with no observable presence in samples ...

ST. PETERSBURG, Fla. — Researchers with the University of South Florida have identified viruses associated with Karenia brevis, the single-celled organism that causes red tide. Researchers ...

Karenia brevis is the organism that causes red tide. During red tide events, the researchers collected Karenia brevis bloom samples to analyze in a lab.

ST. PETERSBURG, Fla. (WFLA) — Researchers at the University of South Florida led a new study that is the first to identify viruses associated with the organism, karenia brevis, that causes red tide.

Published in the American Society for Microbiology’s journal mSphere, the study is the first to identify viruses associated with Karenia brevis, the single-celled organism that causes red tide.

A new study led by researchers at the University of South Florida shines light on the environmental drivers of red tide blooms. Published in the American Society for Microbiology’s journal mSphere, ...

Reference: Lim SJ, Rogers A, Rosario K, et al. Diverse ssRNA viruses associated with Karenia brevis harmful algal blooms in southwest Florida. mSphere. 2025. Doi: 10.1128/msphere.01090-24 This article ...

Diverse ssRNA viruses associated with Karenia brevis harmful algal blooms in southwest Florida. mSphere, 2025; DOI: 10.1128/msphere.01090-24 ...

The most recent samples of the Karenia brevis cell across the west coast of Florida. It impacts humans and nearby businesses, too. Although not recommended, most people can safely swim in Red Tide.

Karenia brevis, the organism that causes red tide, was found in 111 samples around Florida’s Gulf Coast. These were primarily between Tampa and Naples, with some emerging around the Florida Keys.

Karenia brevis, the organism that causes red tides here, exists naturally in the Gulf of Mexico at background concentrations but becomes deadly to fish, birds and marine mammals when ...