MeSH definition : A species of gram-negative bacteria that is the causative agent of human EHRLICHIOSIS.
This organism was first discovered at Fort Chaffee, Arkansas, when blood samples from
suspected human ehrlichiosis patients were studied.;
MeSH annotation : chaffeensis refers to Fort Chaffee, Arkansas, where first discovered; infection: coord
IM with EHRLICHIOSIS (IM); infection: coordinate with EHRLICHIOSIS;
A species of gram-negative bacteria that is the causative agent of human EHRLICHIOSIS.
This organism was first discovered at Fort Chaffee, Arkansas, when blood samples from
suspected human ehrlichiosis patients were studied.