AS Orthopedic Causes The exact cause of ankylosing spondylitis remains unknown. A possible genetic hyperlink exists, as the risk of developing ankylosing spondylitis or any additional seronegative spondyloarthropathy increases when a family member has the condition. Ankylosing spondylitis and the additional spondyloarthropathies have already been linked to a particular protein also, HLA-B27, in someone’s blood. If this proteins is present, the risk of developing ankylosing spondylitis is normally multiplied 10 times. The precise role this protein plays in the advancement of ankylosing spondylitis is usually unclear..If we’re interested in protecting police officers, we have to look at what’s killing them, and what’s killing them is guns, lead author David Swedler, research assistant professor of environmental and occupational wellness sciences at University of Illinois at Chicago College of Public Health, said in a university news release. We know that 92 % of cops killed in the type of duty are killed by guns, three-quarters of which are handguns, he stated. Of the 782 cops who were murdered through the study period, 716 were killed by guns, including 515 by handguns, the study revealed. Thirty-eight % of households nationwide have got at least one gun, the researchers found.