ATCV-1 Virus

Did You Know?

There's a virus called 'ATCV-1' that attacks human DNA making people less intelligent, impairing brain activity, learning and memory.

American scientists have located a virus that attacks human DNA, which may cause those infected to be less intelligent, impairing brain activity, learning and memory.

Researchers from Johns Hopkins School of Medicine and the University of Nebraska have identified traces of an algal virus, known as ATCV-1, in throat swabs drawn from healthy volunteers which appeared to lessen their mental capacity.

The researchers had originally been working on an unrelated study into throat microbes when they unexpectedly located traces of ATCV-1 in human DNA samples. At first the research team, led by Dr Robert Yolken of Johns Hopkins, didn't know what ATCV-1 was, and had to carry out a database search to find out more about the unknown virus.

ATCV-1 typically infects a species of green algae found in lakes and rivers, and has not previously been known to infect humans. However, when Yolken's team screened a group of 92 healthy volunteers who were taking part in a study on cognitive function, the virus was found to be present in 43.5% of them.

According to the study, those infected with the virus performed around 10% worse on tests analysing visual processing speeds. In one test, infected volunteers were slower to draw a line connecting a sequence of numbers randomly distributed on a page than their uninfected counterparts.

The researchers found that the presence of the virus was linked to lower attention spans and decreased spatial awareness, and a "statistically significant decrease in the performance on cognitive assessments of visual processing and visual motor speed". Researchers found no connection between slower brain function and variables such as differences in sex, education level, income, race, and even cigarette smoking.

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