only bats are the carier of dangerous viruses explain
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A bat’s antiviral defenses let it safely carry viruses that can cause deadly outbreaks in other animals. One example is the Marburg virus, a close relative of Ebola that comes from Egyptian fruit bats (pictured), which causes severe bleeding and organ failure.
The mammals can carry many viruses with the potential to cause serious diseases in people, including rabies, Ebola, Nipah, severe acute respiratory syndrome, or SARS, and others. Bats rarely get sick from those viruses. Why these pathogens tend to be so dangerous when they infect other animals has been a mystery.
Previous work suggests that a bat’s immune system is especially adapted to tolerate viruses, thanks in part to its ability to limit inflammation. Now a study using cells grown in a lab hints that to counter a bat’s immune defenses, these viruses have gotten good at spreading rapidly from cell to cell. That means that when they get into animals without a similarly strong immune system, the viruses are particularly adept at causing serious damage.
The study is “an important piece of the puzzle in understanding why viruses [from bats] may be emerging and impacting people and other animals,” says Kevin Olival, a disease ecologist with EcoHealth Alliance in New York City, who wasn’t involved in the research. “There’s a lot we can learn from bats about their immune system and take some of that information to think about our own health and developing our own therapeutics” against viruses
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