ICD-11 definition : A disease caused by an infection with the gram-negative bacteria Rickettsia. This
disease is characterized by fever, eschar, or rash. Transmission is commonly through
the bite of an infected tick.;
A disease caused by an infection with the gram-negative bacteria Rickettsia. This
disease is characterized by fever, eschar, or rash. Transmission is commonly through
the bite of an infected tick.