Researchers have found that a virus that commonly infects green algae is also rampant in humans. And according to them, it would alter our cognitive functions.
If you like to play with seaweed when you are at the beach or by a lake, beware. These aquatic plants can sometimes be a real nest for germs. Indeed, American researchers have discovered that a microorganism called ATCV-1, which finds refuge in green algae, also infects humans and could alter cognitive functions, such as the sense of direction and the visual memory.
Recently published in the proceedings of the American Academy of Sciences (PNAS), these results show, however, that the virus is not dangerous for physical health. “This is a vivid example of how a seemingly harmless microorganism in our bodies can affect our behavior and cognition. But for now, we don’t think the virus is a threat to public health, ”Dr. Robert Yolken, lead author of the study, told AFP.
Similar effects in mice
It was by exploring the microbial flora in the throats of 92 humans that the researchers found the ATCV-1 virus. Indeed, it was present in the throats of 40 patients. The doctors then decided to implant the virus in mice, in order to compare the effects. The repercussions on cognitive functions were similar to those observed in humans: difficulty finding one’s way in a maze, reduced ability to concentrate. “The similarity of results in humans and mice shows common mechanisms used by many microbes to alter cognitive functions in animals and people,” said Dr. Mikhail Pletnikov, one of the study’s co-authors. .
This virus is thought to affect the tissues of the hippocampus, the region of the brain that stores memory and spatial orientation. However, the researchers make it clear that these are preliminary results and that more research is needed to determine the precise effects on human cognitive functions of this virus and to understand how it is spread. .
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