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This study investigated whole-cell oral cholera vaccine (kOCV) single-dose effectiveness and transmission dynamics of through 4 years of epidemiological and genomic surveillance in Democratic Republic of the Congo (DRC). Whole genome sequencing was performed on clinical and water strains from 200 patient households and found annual bimodal peaks of clade AFR10e. 1154 diarrhea patients were enrolled with 342 culture confirmed cholera patients.
View Article and Find Full Text PDFBackground: The aim of this prospective cohort study is to build evidence on transmission dynamics and risk factors for infections in cholera patient households.
Methods: Household contacts of cholera patients were observed for 1-month after the index cholera patient was admitted to a health facility for stool, serum, and water collection in urban Bukavu in South Kivu, Democratic Republic of the Congo. A infection was defined as a bacterial culture positive result during the 1-month surveillance period and/or a four-fold rise in a O1 serological antibody from baseline to the 1-month follow-up.
Aminoglycoside tolerance in engages translational reprogramming associated with queuosine tRNA modification.
Elife
January 2025
Institut Pasteur, Université Paris Cité, Unité Plasticité du Génome Bactérien, Paris, France.
Tgt is the enzyme modifying the guanine (G) in tRNAs with GUN anticodon to queuosine (Q). is required for optimal growth of in the presence of sub-lethal aminoglycoside concentrations. We further explored here the role of the Q34 in the efficiency of codon decoding upon tobramycin exposure.
View Article and Find Full Text PDFBacteria use exogenous peptidoglycan as a danger signal to trigger biofilm formation.
Nat Microbiol
January 2025
Biozentrum, University of Basel, Basel, Switzerland.
For any organism, survival is enhanced by the ability to sense and respond to threats in advance. For bacteria, danger sensing among kin cells has been observed, but the presence or impacts of general danger signals are poorly understood. Here we show that different bacterial species use exogenous peptidoglycan fragments, which are released by nearby kin or non-kin cell lysis, as a general danger signal.
View Article and Find Full Text PDFStructural and functional analysis of the lipoprotein chaperone LolA.
Front Microbiol
December 2024
Umeå Centre for Microbial Research (UCMR), Umeå University, Umeå, Sweden.
Lipoproteins are crucial for maintaining the structural integrity of bacterial membranes. In Gram-negative bacteria, the localization of lipoprotein (Lol) system facilitates the transport of these proteins from the inner membrane to the outer membrane. In , an ε-proteobacterium, lipoprotein transport differs significantly from the canonical and well-studied system in , particularly due to the absence of LolB and the use of a LolF homodimer instead of the LolCE heterodimer.
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