Though often seen as omens of bad luck in Western culture, one black cat has proven quite the opposite for a group of scientists.Pepper, a dark-coated feline, helped identify a new virus capable of infecting humans — marking the second time he has contributed to the discovery of a novel pathogen.
A Shrew, a Scientist, and a Surprise
Like many cats, Pepper indulged in hunting and brought home an Everglades short-tailed shrew (Blarina peninsulae), a small, venomous mammal native to Florida. His owner, John Lednicky — a virologist at the University of Florida College of Public Health and Health Professions — decided to examine the creature in his lab.
While this might sound unusual to most people, in scientific circles it’s far from strange. In fact, field biologists often view such finds as valuable research opportunities. Lednicky, who has long studied virus transmission in wildlife, saw the shrew as a chance for further exploration.
“This was an opportunistic study,” Lednicky explained. “When you find a dead animal, why not test it? You never know what you might discover.”
Discovery of a New Orthoreovirus
In this case, researchers detected a previously unknown virus within the Orthoreovirus genus — a group of mammalian viruses known to infect a range of hosts, including humans. While many orthoreovirus infections are mild, causing upper respiratory or gastrointestinal symptoms, more severe cases can lead to pneumonia, neurological disease, and even central nervous system complications.
Although scientists still don’t fully understand their effects in humans, they have linked orthoreoviruses to conditions such as encephalitis, meningitis, and gastroenteritis in children.These viruses also possess the ability to exchange genetic material when two strains infect the same cell, creating the potential for new variants to emerge — much like influenza.
“There are many mammalian orthoreoviruses, and we still don’t know enough about this new one to raise alarms,” said lead author Emily DeRuyter of the University of Florida. “Initially, they were thought to be ‘orphan’ viruses — found in mammals including humans but not linked to illness. More recent research suggests they may play roles in respiratory, gastrointestinal, and neurological diseases.”
Interestingly, this isn’t Pepper’s first brush with viral fame. Last year, a mouse he caught led to the discovery of Gainesville rodent jeilongvirus 1, the first jeilongvirus — a group of paramyxoviruses tied to respiratory illnesses — ever documented in the United States.
Potential for Spillover Events
Jeilongvirus replicates equally well in rodent, human, and non-human primate cells, making it a strong candidate for a spillover event, said Lednicky at the time.
Pepper, fortunately, showed no signs of illness after either discovery and remains an active hunter at his Gainesville home. The research team has since published the complete genome sequence of the new virus, now named Gainesville shrew mammalian orthoreovirus type 3 strain UF-1.
Cats evolved to prey on rodents and typically don’t get sick from rodent-borne viruses, Lednicky noted after Pepper’s first viral contribution. But we still need to test whether these viruses can affect pets or people.
A Balanced View on Feline Impact
It’s also important to acknowledge that domestic and feral cats have had a devastating impact on global biodiversity, contributing to the extinction of dozens of bird and mammal species. Still, in this instance, Pepper’s natural instincts have advanced our understanding of emerging pathogens — casting him more as a scientific sidekick than a villain.
We’re surrounded by unknown viruses, and I feel like a detective chasing them down, said DeRuyter.
The key takeaway, added Lednicky, is that we need to monitor orthoreoviruses closely and improve our ability to detect them quickly.
Read the original article on: New Atlas
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