Human ehrlichiosis and anaplasmosis are acute febrile tick-borne diseases caused by
various members of the genera Ehrlichia and Anaplasma (Anaplasmataceae). Human …

Over 100 years ago, Robert Koch introduced his ideas about how to prove a causal
relationship between a microorganism and a disease. Koch's postulates created a scientific …

Six patients from northern Minnesota and Wisconsin with a febrile illness accompanied by
granulocytic cytoplasmic morulae suggestive of ehrlichial infection were identified. Two …

Ehrlichia chaffeensis is an obligately intracellular, tick-transmitted bacterium that is
maintained in nature in a cycle involving at least one and perhaps several vertebrate …

Objective.—To characterize the clinical presentation and course, laboratory findings, and
treatment outcome of 12 patients with human granulocytic ehrlichiosis. Setting.—The 12 …

Background Human ehrlichiosis is a recently recognized tick-borne infection. Four species
infect humans: Ehrlichia chaffeensis, E. sennetsu, E. canis, and the agent of human …

Polymerase chain reaction and Southern hybridization were used to survey for the presence
of Ehrlichia canis, Ehrlichia chaffeensis, and Ehrlichia ewingii in blood samples of 65 dogs …

Advances in molecular biology are now providing the means for solving long-standing
problems in microbiology. One of the best examples is the development of a rational …

Two infectious diseases, and one presumably infectious disease, each vectored by or
associated with the bite of the lone star tick (Amblyomma americanum), were identified and …

Interest in tick-borne pathogens has been enhanced by the emergence of Lyme disease
and, more recently, human and animal ehrlichioses. In order to facilitate investigations of the …