In the US, scrapie has caused certain bloodlines to be disfavored and discontinued due to the genetic susceptibility to scrapie. In addition, flocks are monitored for the presence of scrapie and if a scrapie problem is detected the flock may be depopulated (destroyed) or the lambs have to be carefully raised by hand to get the infectious protein out of the flock.
J. Russell Greig has written: 'Scrapie' -- subject(s): Scrapie, Veterinary neurology
R. H. Kimberlin has written: 'Scrapie in the mouse' -- subject(s): Mice as laboratory animals, Scrapie
because it looked like a scratch
They get BSE or Kuru or Scrapie.
Goats and sheep can get scrapie, a transmissable spongiform encephalopathy (TSE). Other animals can get TSE's but they are called different names eg Mad Cow Disease etc
The dimention
pathogen means microorganism, so pathogen diseases means diseases caused by microorganisms
An avirulent pathogen is a pathogen that is unable to cause disease in its host. This may be due to mutations that have reduced its ability to infect or harm the host, making it less pathogenic compared to a virulent pathogen.
You have to specify the pathogen.
Prions.
There are infinitely many things that do not contribute to the virulence of a pathogen. Elvis does not contribute to the virulence of a pathogen.