Results 101 to 110 of about 9,793 (167)

Ecological dynamics of blacklegged ticks, vertebrate hosts, and associated zoonotic pathogens in northeastern forests

Ecosphere, Volume 16, Issue 12, December 2025.
Abstract Specific host‐tick interactions in temperate forest systems influence variation in density and infection prevalence of nymphal blacklegged tick (Ixodes scapularis). The density of infected nymphs (DIN), which is the product of nymphal infection prevalence (NIP) and density of questing nymphs (DON), influences the risk of human exposure to tick‐
Shannon L. LaDeau, Kelly Oggenfuss, Alexander Schmidt, Saravanan Thangamani, Richard S. Ostfeld   +4 more
wiley   +1 more source

Transmission electron microscopy reveals distinct macrophage- and tick cell-specific morphological stages of Ehrlichia chaffeensis. [PDF]

PLoS ONE, 2012
Ehrlichia chaffeensis is an emerging tick-borne rickettsial pathogen responsible for human monocytic ehrlichiosis. Despite the induction of an active host immune response, the pathogen has evolved to persist in its vertebrate and tick hosts ...
Sarah E Dedonder, Chuanmin Cheng, Lloyd H Willard, Daniel L Boyle, Roman R Ganta   +4 more
doaj   +1 more source

Ehrlichia chaffeensis Tandem Repeat Proteins are Related to the RTX Family of Toxins and Secreted by the Type 1 Secretion System

Frontiers in Cellular and Infection Microbiology, 2011
Ehrlichia chaffeensis has type 1 and 4 secretion systems (T1SS and T4SS), but the substrates have not been identified. Potential substrates include secreted tandem repeat protein (TRP) 47, TRP120, and TRP32, and the ankyrin repeat protein, Ank200, that ...
Abdul eWakeel, Amke eden Dulk-Ras, Paul J.J. Hooykaas, Jere W McBride   +3 more
doaj   +1 more source

Ehrlichiosis in a Recent Liver Transplant Recipient Leading to Multiorgan Failure

Case Reports in Transplantation, 2022
Ehrlichia infection has a broad spectrum of diseases ranging from asymptomatic to fatal. While Ehrlichia often presents as a mild form of the disease in immunocompetent patients, immunosuppressed patients are at increased risk for a more virulent and ...
Fawwaz Almajali, Catherine Oleary, Taylor Hallcox, Justin Lok, Daniela Hermelin, Alexis Guenette, Mustafa Nazzal   +6 more
doaj   +1 more source

Reinfection withEhrlichia chaffeensisin a Liver Transplant Recipient [PDF]

Clinical Infectious Diseases, 2002
Human monocytic ehrlichiosis is an emerging infection caused by Ehrlichia chaffeensis, but reinfection with this agent has not been described. We report a case of reinfection with E. chaffeensis after a 2-year interval in a 56-year-old liver transplant recipient with frequent tick attachments.
Allison M, Liddell, John W, Sumner, Christopher D, Paddock, Yasuko, Rikihisa, Ahmet, Unver, Richard S, Buller, Gregory A, Storch   +6 more
openaire   +2 more sources

A Case of Illness Following a Bite by a Male Lone Star Tick (Amblyomma americanum Linnaeus) Infected With Ehrlichia sp. and Rickettsia amblyommatis in Connecticut, United States

Clinical Case Reports, Volume 13, Issue 9, September 2025.
A case of local lymphadenopathy and a flu‐like illness in a man, following a bite by a male lone star tick infected with Ehrlichia sp. and Rickettsia amblyommatis. ABSTRACT The lone star tick (Amblyomma americanum Linnaeus) is a species commonly found in the southeastern U.S., but in recent years its populations have expanded northward, resulting in an
Noelle Khalil, Abigail Chang, Lorelei Sandland, Henry M. Feder Jr., Goudarz Molaei   +4 more
wiley   +1 more source

DETECTION OF ANTIBODIES REACTIVE WITH EHRLICHIA CHAFFEENSIS IN THE RACCOON [PDF]

Journal of Wildlife Diseases, 2000
Antibodies reactive with Ehrlichia chaffeensis were detected in raccoon (Procyon lotor) serum samples by using an indirect immunofluorescence assay. Samples from 411 raccoons trapped in the southeastern United States from 1977 to 1999 were tested. Serologically reactive samples with reciprocal titers of > or =16 were detected from 83 raccoons (20 ...
J A, Comer, W L, Nicholson, C D, Paddock, J W, Sumner, J E, Childs   +4 more
openaire   +2 more sources

Descriptive Analysis and Factors Associated With Relapse in Dogs With Presumptive Idiopathic Immune‐Mediated Polyarthritis

Journal of Veterinary Internal Medicine, Volume 39, Issue 5, September/October 2025.
ABSTRACT Background Immune‐mediated polyarthritis (IMPA) is a joint disease common in dogs. Although its prognosis is generally favorable, relapses are frequent, and predictive factors for relapse remain poorly characterized. Objectives To evaluate the outcome of medical management of IMPA in dogs and identify predictive factors for relapse.
Diane Pichard, Thibaud Robin, Kevin Le Boedec, Christelle Maurey, Maxime Kurtz, Fiona Da Riz, Stéphane Blot, Morgane Canonne‐Guibert, Mario Cervone, Emilie Krafft, Jean‐Luc Cadore, Loïc Desquilbet, Ghita Benchekroun   +12 more
wiley   +1 more source

Brucella canis in two juvenile labrador retriever littermates with no known travel history

Veterinary Record Case Reports, Volume 13, Issue 2, June 2025.
Abstract Two labrador retriever littermates presented separately to investigate chronic lethargy and shifting lameness. In both cases, clinical examination revealed a multi‐limb lameness. Neither the patients nor their dam or sire had a travel history outside the UK.
Amy Lord, Oliver Russell, Ombeline McGregor, Robert Dudley, Cassia Hare, Barbara Skelly   +5 more
wiley   +1 more source

Ehrlichia Infection in Italy

Emerging Infectious Diseases, 1998
Immunoglobulin M seroconversion to Ehrlichia chaffeensis was documented in U.S. citizens bitten by ticks in Sardinia. Seven cases of suspected ehrlichiosis in local residents were not confirmed by laboratory tests.
M. Nuti, D.A. Serafini, D. Bassetti, A. Ghionni, F. Russino, P. Rombolà, G. Macri, E. Lillini   +7 more
doaj   +1 more source