Vibrio bacteria are usually found in warm waters, but new research has found them in the cold Baltic Sea as a result of rising temperatures. Controlling the spread will be hard.
A team of scientists from Britain, Finland, Spain and the United States says it has the first hard evidence to link rising ocean temperatures in Northern Europe with the emergence of various strains of Vibrio bacteria.
Vibrio bacteria is normally found in warm, tropical marine environments but has been detected in the usually cold Baltic Sea.
It belongs to a group of bacteria which - depending on the strain - can cause gastroenteritis or cholera in humans if raw or undercooked shellfish are consumed, or through exposure to contaminated seawater.