Results 61 to 70 of about 3,995 (206)

Image_5_Glutathione Synthesis Regulated by CtrA Protects Ehrlichia chaffeensis From Host Cell Oxidative Stress.TIF

, 2022
Ehrlichia chaffeensis, a small Gram-negative obligatory intracellular bacterium, infects human monocytes or macrophages, and causes human monocytic ehrlichiosis, one of the most prevalent, life-threatening emerging zoonoses.
Qi’an Liang (12319844), Meifang Li (798144), Yongxin Jin (533449), Weihui Wu (533451), Zhouyi Chai (10229546), Jiaqi Yan (1479574), Nan Yang (305078), Zhihui Cheng (296359), Nan Duan (4837896), Fang Bai (1612534), Yajing Liu (728964), Xiaoxiao Li (195315)   +11 more
core   +1 more source

Ehrlichia chaffeensis and Its Invasin EtpE Block Reactive Oxygen Species Generation by Macrophages in a DNase X-Dependent Manner

mBio, 2017
The obligatory intracellular pathogen Ehrlichia chaffeensis lacks most genes that confer resistance to oxidative stress but can block reactive oxygen species (ROS) generation by host monocytes-macrophages.
Omid Teymournejad, Mingqun Lin, Yasuko Rikihisa   +2 more
doaj   +1 more source

Rickettsiales in South America: A Systematic Review of Their Molecular Detection and Distribution in Arthropods and Vertebrates

Public Health Challenges, Volume 5, Issue 2, June 2026.
ABSTRACT Bacteria of the order Rickettsiales comprise a diverse group of obligate intracellular microorganisms that are globally distributed and highly prevalent in tropical and subtropical regions. In South America, these bacteria have been associated with arthropod vectors, such as ticks, fleas, mites, lice, and certain dipterans, as well as with a ...
Cristian J. Zamorano‐Gómez, Paula A. Ossa‐López, Estefani T. Martínez‐Sánchez, Fredy A. Rivera‐Paéz   +3 more
wiley   +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

Cell signaling in Ehrlichia infection and cancer: Parallels in pathogenesis

Frontiers in Cellular and Infection Microbiology
Ehrlichia chaffeensis (E. chaffeensis) has recently emerged as an intracellular bacterial pathogen with sophisticated survival mechanisms that include repurposing evolutionarily conserved eukaryotic cell signaling pathways for immune evasion.
Regina N. Solomon, Nicholas A. Pittner, Jaclyn R. McCoy, Paityn A. Warwick, Jere W. McBride, Jere W. McBride, Jere W. McBride, Jere W. McBride, Jere W. McBride   +8 more
doaj   +1 more source

Human ehrlichiosis [PDF]

Vojnosanitetski Pregled, 2006
Background. Human ehrlichiosis is a newly recognized disease. It is a tick-borne disease caused by several bacterial species of the genhus Erlichia. These are small gram-negative pleomorphic cocci, that are obligatory intracellular bacteria.
Đokić Milomir, Ćurčić Petar, Nožić Darko, Lako Branislav, Begović Vesna, Rajić-Dimitrijević Radmila, Hristović Dejan   +6 more
doaj   +1 more source

Latent Neoehrlichia mikurensis Infections May Be Reactivated in Patients With B‐Cell Lymphomas Treated With Rituximab

Immunology, Volume 178, Issue 2, Page 307-317, June 2026.
Eight percent of this cohort of patients had a latent Neoehrlichia mikurensis infection. It was only the latently infected patients who had N. mikurensis‐specific T cells, not the matched B‐cell lymphoma patients without the infection. The T‐cell responses of latently infected patients included perforin‐expressing Th1 and CD8+ T cells that upregulated ...
Linda Wass, Catharina Lewerin, Daniel Jaén‐Luchoro, Christine Lingblom, Christine Wennerås   +4 more
wiley   +1 more source

Ehrlichia chaffeensis TRP75 Interacts with Host Cell Targets Involved in Homeostasis, Cytoskeleton Organization, and Apoptosis Regulation To Promote Infection

mSphere, 2018
Ehrlichia chaffeensis is an obligately intracellular bacterium that exhibits tropism for mononuclear phagocytes. The mechanisms involved in E. chaffeensis infection of the host cell and evasion of host defenses are not fully defined, but a subset of type
Tian Luo, Shubhajit Mitra, Jere W. McBride   +2 more
doaj   +1 more source

A Case of Sepsis Caused by ST80 Multidrug‐Resistant Enterococcus faecium With Concurrent Klebsiella pneumoniae Infection in a Dog

Veterinary Medicine and Science, Volume 12, Issue 3, May 2026.
An 8‐year‐old dog developed acute respiratory distress that progressed to sepsis and death. Multidrug‐resistant Enterococcus faecium ST80 was isolated from the liver and kidney, while Klebsiella pneumoniae was detected in the lung by PCR. Whole‐genome sequencing showed that the ST80 isolates were genetically identical, suggesting hematogenous spread ...
Hyung‐min Seo, Tae‐Min La, Ye‐ram Seo, Dong‐Yeop Lee, Hyun‐Jung Han, Ji‐Yeon Hyeon   +5 more
wiley   +1 more source

Ehrlichia chaffeensis Infections in Drosophila melanogaster [PDF]

Infection and Immunity, 2009
ABSTRACT Ehrlichia chaffeensis is an obligate, intracellular bacterium, transmitted by the tick Amblyomma americanum , and is the causative agent of human monocytic ehrlichiosis infections. We previously demonstrated that E. chaffeensis is capable of growing in
Alison, Luce-Fedrow, Tonia, Von Ohlen, Stephen K, Chapes   +2 more
openaire   +2 more sources