A viral disease that affects cats may help researchers gain a deeper understanding of how coronaviruses spread within the immune system, and how their effects can persist for long periods, as we see in “long COVID.”
Cats and Corona
In a recent study conducted by the University of California – Davis, researchers discovered that the virus associated with feline infectious peritonitis (FIP) does not limit its attack to one type of immune cell as previously thought, but extends to a broader range of immune cells, including essential cells necessary to combat infection.
The researchers indicate that these findings may provide valuable insights into understanding “long COVID” and chronic inflammatory diseases in humans.
FIP only affects cats, but it is characterized by acute inflammation and damage to multiple organs, with symptoms that may persist or return after a period, raising an alarming similarity to some of the severe and chronic conditions associated with coronavirus in humans.
The prevailing belief has always been that the FIP virus targets only one type of immune cell, but the Davis University team found evidence indicating that it spreads within multiple types, including B lymphocytes responsible for producing antibodies, and T lymphocytes, which play a crucial role in destroying infected cells and regulating the immune response.
The study revealed that the virus does not just leave genetic remnants inside these cells, but appears to actually multiply in them, opening the door to the possibility of it remaining active within the body.
One of the central issues in “long COVID” research is determining whether the virus remains present within the body, or whether it leaves the immune system in a state of chronic disruption.
The researchers emphasize that studying a natural disease in animals, where immune tissues can be examined directly and over a longer period of time, gives scientists a unique opportunity to understand these mechanisms.
The study, published in the journal Veterinary Microbiology, concludes that animal diseases may sometimes provide answers that human studies cannot reach, and that understanding how the FIP virus spreads in the immune system may help clarify the causes of chronic inflammation and post-infection syndromes in humans, most notably “long COVID.”
