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High prevalence of CTX-M-15 producing Shigella spp. isolated from patients with gastroenteritis in Northeast Iran.
Acta Microbiol Immunol Hung
December 2024
1Department of Microbiology and Virology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Shigellosis, a diarrheal disease caused by Shigella species, is a significant public health concern, particularly in developing countries with inadequate sanitation systems. This study aimed to investigate the patterns of antibiotic resistance, ESBL and AmpC genes, integrons, and enterotoxin genes in Shigella species isolated from patients with gastroenteritis in Northeast Iran. This cross-sectional study was conducted between January 2017 and December 2019 at a tertiary care hospital in Northeast Iran.
View Article and Find Full Text PDFDissemination of the blaCTX-M-15 gene among Enterobacteriaceae via outer membrane vesicles.
J Antimicrob Chemother
September 2020
Institute for Hygiene, University of Muenster, Robert Koch Str. 41, 48149 Muenster, Germany.
Background: Bacterial outer membrane vesicles (OMVs) are an emerging source of antibiotic resistance transfer but their role in the spread of the blaCTX-M-15 gene encoding the most frequent CTX-M ESBL in Enterobacteriaceae is unknown.
Objectives: To determine the presence of blaCTX-M-15 and other antibiotic resistance genes in OMVs of the CTX-M-15-producing MDR Escherichia coli O104:H4 outbreak strain and the ability of these OMVs to spread these genes among Enterobacteriaceae under different conditions.
Methods: OMV-borne antibiotic resistance genes were detected by PCR; OMV-mediated transfer of blaCTX-M-15 and the associated blaTEM-1 was quantified under laboratory conditions, simulated intraintestinal conditions and under ciprofloxacin stress; resistance to antibiotics and the ESBL phenotype were determined by the CLSI disc diffusion methods and the presence of pESBL by plasmid profiling and Southern blot hybridization.
The role of international travellers in the spread of CTX-M-15-producing Shigella sonnei in the Republic of Korea.
J Glob Antimicrob Resist
September 2019
Division of Bacterial Diseases, Center for Laboratory Control of Infectious Diseases, Korea Centers for Diseases Control and Prevention, Chungcheongbuk-do, Republic of Korea. Electronic address:
Background: Multidrug-resistant Shigella isolates have recently emerged as a serious public health threat worldwide. In particular, overseas travel is a risk factor for acquisition of antimicrobial-resistant Shigella strains. To explore the role of travel in the spread of cefotaxime-resistant Shigella sonnei in Korea, we screened 751 Shigella spp.
View Article and Find Full Text PDF[Characterisation of a CTX-M-15-producing Shigella sonnei in a Spanish patient who had not travelled abroad].
Enferm Infecc Microbiol Clin
October 2012
Servicio de Microbiología, Hospital Clínico Universitario Lozano Blesa, Zaragoza, España.
One hundred and seven Shigella spp. strains were isolated in our laboratory during the years 2000 to 2010. One Shigella sonnei harboured the genes that coded the β-lactamases TEM-1 and CTX-M-15, identifying the structure, ISEcp1+bla(CTX-M-15)+orf477, in their genetic environment.
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