Abstract In the United States, ticks transmit the greatest diversity of arthropod-borne
pathogens and are responsible for the most cases of all vector-borne diseases. In recent …

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

The genera Anaplasma, Ehrlichia, Cowdria, Neorickettsia and Wolbachia encompass a
group of obligate intracellular bacteria that reside in vacuoles of eukaryotic cells and were …

Ticks are currently considered to be second only to mosquitoes as vectors of human
infectious diseases in the world. Each tick species has preferred environmental conditions …

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 …

Summary Background Anaplasma phagocytophilum and Anaplasma ovis cause human
infections. We investigated the potential for human pathogenicity of a newly discovered …

The family Anaplasmataceae includes gram-negative obligate intracellular
alphaproteobacteria, which amplify within membrane-bound vacuoles. The genera …

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 …

▪ Abstract Until the 1990s, Amblyomma americanum was regarded primarily as a nuisance
species, but a tick of minor importance as a vector of zoonotic pathogens affecting humans …