Results 31 to 40 of about 4,827 (166)

Variation in siderophore biosynthetic gene distribution and production across environmental and faecal populations of Escherichia coli. [PDF]

PLoS ONE, 2015
Iron is essential for Escherichia coli growth and survival in the host and the external environment, but its availability is generally low due to the poor solubility of its ferric form in aqueous environments and the presence of iron-withholding proteins
Laura J Searle, Guillaume Méric, Ida Porcelli, Samuel K Sheppard, Sacha Lucchini   +4 more
doaj   +1 more source

Potential virulence of Klebsiella sp. isolates from enteral diets [PDF]

Brazilian Journal of Medical and Biological Research, 2015
We aimed to evaluate the potential virulence of Klebsiella isolates from enteral diets in hospitals, to support nosocomial infection control measures, especially among critical-care patients.
S.C.L. Pereira, M.C.D. Vanetti
doaj   +3 more sources

In vivo bioluminescence imaging of Escherichia coli O104:H4 and role of aerobactin during colonization of a mouse model of infection

BMC Microbiology, 2012
Background A major outbreak of bloody diarrhea associated with Shiga toxin-producing Escherichia coli O104:H4 occurred early in 2011, to which an unusual number of hemolytic uremic syndrome cases were linked.
Torres Alfredo G, Cieza Roberto J, Rojas-Lopez Maricarmen, Blumentritt Carla A, Souza Cristiane S, Johnston R, Strockbine Nancy, Kaper James B, Sbrana Elena, Popov Vsevolod L   +9 more
doaj   +1 more source

Hypervirulent Klebsiella pneumoniae in a South African tertiary hospital—Clinical profile, genetic determinants, and virulence in Caenorhabditis elegans

Frontiers in Microbiology
IntroductionA distinct strain of Klebsiella pneumoniae (K. pneumoniae) referred to as hypervirulent (hvKp) is associated with invasive infections such as pyogenic liver abscess in young and healthy individuals.
Likhona Dingiswayo, Olusesan Adeyemi Adelabu, Emmanuel Arko-Cobbah, Carolina Pohl, Nthabiseng Zelda Mokoena, Morne Du Plessis, Jolly Musoke, Jolly Musoke   +7 more
doaj   +1 more source

Presence and expression of aerobactin genes in virulent avian strains of Escherichia coli [PDF]

Infection and Immunity, 1987
Virulent and nonvirulent isolates of avian Escherichia coli were tested for the presence of aerobactin genes by colony hybridization with a specific gene probe constructed from plasmid pABN1 (A. Bindereif and J. B. Neilands, J. Bacteriol. 153:1111-1113, 1983).
Lafont, J.P., Dho, M., d'Hauteville, H.M., Brée, Annie, Sansonetti, P. J.   +4 more
openaire   +3 more sources

Emergence of Ceftazidime‐Avibactam‐Induced KPC Variants (KPC‐25/127) in Intracranial Infection and Implications for Clinical Management

MicrobiologyOpen, Volume 15, Issue 4, August 2026.
Novel KPC‐25 and first‐reported KPC‐127 sequentially evolved in one patient under CAZ‐AVI pressure, distinct mutations remodel enzyme activity to drive differential multidrug resistance. ABSTRACT The emergence of novel Klebsiella pneumoniae carbapenemase (KPC) variants contributing to clinical treatment failure poses a substantial threat to public ...
Ke Lei, Ying Tian, Chaoliang Xiong, Jing Lei, Dong Chen, Xiangni Bai, Mohd H. Abdul‐Aziz, Jiao Xie, Zeshi Liu   +8 more
wiley   +1 more source

Interplay Between Virulence Genes, Antimicrobial Resistance Profiles, and Biofilm Formation in Klebsiella pneumoniae Causing Urinary Tract Infections in North Lebanon

MicrobiologyOpen, Volume 15, Issue 3, June 2026.
– Figure design (single panel) Central icon: K. pneumoniae cell Left panel – Virulence genes (icons): Adhesion: fimH, mrkD → strong biofilm Capsule/regulation: magA, rmpA Siderophores: entB, iucA → iron uptake Right panel – Outcomes: Biofilm strength (weak → strong gradient) Antibiotic resistance (ESBL, MDR) Bottom split: Hospital‐acquired → strong ...
Mazen Zaylaa, Rayan Farha, Jana Taleb, Amal Saad, Omar El Gharbawy, Ricardo Sarraf, Ibtihal Kassam, Chadi Hamdach, Nisrine Bissar   +8 more
wiley   +1 more source

The Role of Neonatal Ward Environment as a Reservoir for the Dissemination of Multidrug‐Resistant Klebsiella pneumoniae in Algeria

MicrobiologyOpen, Volume 15, Issue 3, June 2026.
Whole‐genome sequencing of multidrug‐resistant Klebsiella pneumoniae from a neonatal ward environment in Chlef revealed persistent resistance genes and the clonal spread of high‐risk ST13. These findings highlight the hospital environment as a potential reservoir for transmission of resistant K. pneumoniae.
Meriem Derkaoui, Martin Alexander Fischer, Mohammed Sebaihia, Rachida Namoune, Fatiha Bouheudjeur, Meryem Beloukarif, Bakhta Madaoui, Bruno Silvester Lopes   +7 more
wiley   +1 more source

Comparative genomic analysis and characterization of incompatibility group FIB plasmid encoded virulence factors of Salmonella enterica isolated from food sources

BMC Genomics, 2017
Background The degree to which the chromosomal mediated iron acquisition system contributes to virulence of many bacterial pathogens is well defined.
Bijay K. Khajanchi, Nur A. Hasan, Seon Young Choi, Jing Han, Shaohua Zhao, Rita R. Colwell, Carl E. Cerniglia, Steven L. Foley   +7 more
doaj   +1 more source

Expression of aerobactin genes by Shigella flexneri during extracellular and intracellular growth [PDF]

Infection and Immunity, 1997
The expression of the Shigella flexneri chromosomal aerobactin genes during growth of the bacterium within tissue culture cells was assayed. During intracellular growth, aerobactin promoter activity was repressed relative to the level observed in bacteria grown extracellularly, even when the bacteria had been starved for iron prior to infection ...
V, Headley, M, Hong, M, Galko, S M, Payne   +3 more
openaire   +2 more sources