Not sure, but I do know that the Rickettsias do cause it as well. Q-Fever known to cause abdominal aortic aneurysm and RMSF Thoracic aortic aneurysm.


Coxiella burnetti - Q. Fever
Fever, malaise, anorexia endocarditis (infection of the heart valves), abdominal aortic aneurysm
- Respiratory symptoms (usually dry) cough, shortness of breath, and chest pain, maculopapular rash
- myocarditis, headache, confusion, and neck stiffness, wheezing can be present in patients with pneumonia, cardiac murmurs
- extreme tiredness and weakness, even after minor exercise, muscle pains, headaches, fever, and depression

Rocky_Mountain_spotted_fever aka Rickettsia rickettsii
fever, nausea, vomitting, severe headache, aneurysm (Thoracic), muscle pain, lack of appetite, followed by development of rash