Occurrence of extended-spectrum β-lactamase, AmpC and virulence genes in Escherichia coli isolates from vegetable salads in Morocco

2017 ◽  
Vol 119 (7) ◽  
pp. 1633-1647
Author(s):  
Kaotar Nayme ◽  
Abouddihaj Barguigua ◽  
Brahim Bouchrif ◽  
Idrissa Diawara ◽  
Fatima El Otmani ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Gel Electrophoresis ◽  
Virulence Genes ◽  
Phylogenetic Group ◽  
Pulsed Field Gel Electrophoresis ◽  
Resistant Bacteria ◽  
Content Type ◽  
Pulsed Field ◽  
E Coli ◽  
Extended Spectrum

Purpose The purpose of this paper is to assess the occurrence of the extended-spectrum β-lactamases (ESBLs) and AmpC β-lactamase genes in 144 Escherichia coli isolates recovered from 160 vegetable salad samples. Design/methodology/approach Among the 144 E. coli isolates recovered from 160 vegetable salads, 17 (12 percent) ceftazidime-resistant isolates were screened for ESBL production with the double disk-diffusion test. The ESBL-producing isolates were characterized for antimicrobial resistance, the presence of virulence genes and plasmid-mediated quinolone resistance (PMQR) determinants. The isolates were also subjected to phylogenetic group typing. The existence of plasmid AmpC genes and mutations in the regulatory region of the chromosomal AmpC gene was assessed using polymerase chain reaction (PCR) and sequencing. All β-lactamase isolates were further characterized by pulsed-field gel electrophoresis to determine the genetic relatedness. Findings Overall, 17 (12 percent) of the 144 E. coli isolates studied were ceftazidime resistant. Among the 17 isolates, 13 (77 percent) were multidrug resistant and four (23.5 percent) were ESBL producers. The bla CTX-M14 was the only gene detected. Of the 12 AmpC-producing isolates, three (18 percent) harbored plasmid-encoded AmpC and sequencing analysis of the chromosomal AmpC genes revealed mutations in the promoter/attenuator region. PMQR determinants were detected in 9 (52 percent) isolates. A was the most prevalent phylogenetic group (56 percent), followed by groups B1 (31 percent), D (6 percent), and B2 (6 percent). PCR showed that six (50 percent) ESBL/AmpC-producing E. coli isolates carried one and/or two virulence genes. Pulsed-field gel electrophoresis showed no epidemiological relationship between these isolates. Originality/value This study places vegetable salads within the spectrum of ecological niches that may be vehicles for antibiotic-resistant bacteria/genes with clinical interest and these findings are worthy of attention as their spread to humans by ingestion cannot be dismissed.

scholarly journals Carriage of Escherichia coli Producing CTX-M-Type Extended-Spectrum β-Lactamase in Healthy Vietnamese Individuals

2015 ◽  
Vol 59 (10) ◽  
pp. 6611-6614 ◽  
Author(s):  
Thi Mai Huong Bui ◽  
Itaru Hirai ◽  
Shuhei Ueda ◽  
Thi Kim Ngan Bui ◽  
Kouta Hamamoto ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Gel Electrophoresis ◽  
Pulsed Field Gel Electrophoresis ◽  
Fecal Samples ◽  
Content Type ◽  
Pulsed Field ◽  
E Coli ◽  
Extended Spectrum

ABSTRACTHealthy carriage of CTX-M-type extended-spectrum β-lactamase (ESBL)-producingEscherichia coliwas examined by thrice collecting fecal samples from the same 199 healthy Vietnamese subjects every 6 months. Using pulsed-field gel electrophoresis (PFGE), identical PFGE patterns throughout the three samplings were not observed, although prevalence ofE. coliin the subjects was around 50% in the three samplings. Our results suggested a short carriage period of the CTX-M-type ESBL-producingE. coliin healthy Vietnamese subjects.

scholarly journals Emergence of Enterobacteriaceae Isolates Producing CTX-M Extended-Spectrum β-Lactamase in Austria

2006 ◽  
Vol 50 (2) ◽  
pp. 785-787 ◽  
Author(s):  
Alexandra Eisner ◽  
Elizabeth J. Fagan ◽  
Gebhard Feierl ◽  
Harald H. Kessler ◽  
Egon Marth ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
United Kingdom ◽  
Gel Electrophoresis ◽  
Pulsed Field Gel Electrophoresis ◽  
Pulsed Field ◽  
E Coli ◽  
The United Kingdom ◽  
Extended Spectrum ◽  
Epidemiological Link ◽  
Esbl Producers

ABSTRACT Among 149 extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae isolates collected from patients in southeast Austria from 1998 to 2004, 38 Escherichia coli isolates and 11 Klebsiella spp. were CTX-M producers. The proportion of CTX-M-producers among all ESBL producers rose from 0% in 1998 to 58% in 2004. In general, CTX-M-producers had heterogeneous pulsed-field gel electrophoresis patterns, but one E. coli isolate was identical to a United Kingdom epidemic CTX-M-15-producing strain, although no epidemiological link with the United Kingdom was apparent.

scholarly journals Extraintestinal Pathogenic and Antimicrobial-Resistant Escherichia coli Contamination of 56 Public Restrooms in the Greater Minneapolis-St. Paul Metropolitan Area

2015 ◽  
Vol 81 (13) ◽  
pp. 4498-4506 ◽  
Author(s):  
Muhanad Mohamed ◽  
Kris Owens ◽  
Abby Gajewski ◽  
Connie Clabots ◽  
Brian Johnston ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Metropolitan Area ◽  
Gel Electrophoresis ◽  
Virulence Gene ◽  
Pulsed Field Gel Electrophoresis ◽  
Ecological Data ◽  
Content Type ◽  
Pulsed Field ◽  
E Coli ◽  
Sequence Types

ABSTRACTHow extraintestinal pathogenicEscherichia coli(ExPEC) and antimicrobial-resistantE. colidisseminate through the population is undefined. We studied public restrooms for contamination withE. coliand ExPEC in relation to source and extensively characterized theE. coliisolates. For this, we cultured 1,120 environmental samples from 56 public restrooms in 33 establishments (obtained from 10 cities in the greater Minneapolis-St. Paul, MN, metropolitan area in 2003) forE. coliand compared ecological data with culture results. Isolates underwent virulence genotyping, phylotyping, clonal typing, pulsed-field gel electrophoresis (PFGE), and disk diffusion antimicrobial susceptibility testing. Overall, 168 samples (15% from 89% of restrooms) fluoresced, indicating presumptiveE. coli: 25 samples (2.2% from 32% of restrooms) yieldedE. coliisolates, and 10 samples (0.9% from 16% of restrooms) contained ExPEC. Restroom category and cleanliness level significantly predicted only fluorescence, gender predicted fluorescence andE. coli, and feces-like material and toilet-associated sites predicted all three endpoints. Of the 25E. coliisolates, 7 (28%) were from phylogenetic group B2(virulence-associated), and 8 (32%) were ExPEC. ExPEC isolates more commonly represented group B2 (50% versus 18%) and had significantly higher virulence gene scores than non-ExPEC isolates. Six isolates (24%) exhibited ≥3-class antibiotic resistance, 10 (40%) represented classic human-associated sequence types, and one closely resembled reference human clinical isolates by pulsed-field gel electrophoresis. Thus,E. coli, ExPEC, and antimicrobial-resistantE. colisporadically contaminate public restrooms, in ways corresponding with restroom characteristics and within-restroom sites. Such restroom-sourceE. colistrains likely reflect human fecal contamination, may pose a health threat, and may contribute to population-wide dissemination of such strains.

scholarly journals Increased Mutation Frequencies in Escherichia coli Isolates Harboring Extended-Spectrum β-Lactamases

2005 ◽  
Vol 49 (11) ◽  
pp. 4754-4756 ◽  
Author(s):  
María-Rosario Baquero ◽  
Juan Carlos Galán ◽  
María del Carmen Turrientes ◽  
Rafael Cantón ◽  
Teresa M. Coque ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract ◽  
Gel Electrophoresis ◽  
Mutation Frequency ◽  
Pulsed Field Gel Electrophoresis ◽  
Pulsed Field ◽  
E Coli ◽  
Extended Spectrum

ABSTRACT Hypermutable (mutation frequency [f], ≥4 × 10−8) Escherichia coli strains were more frequently found (43%) in a collection of 89 extended-spectrum β-lactamase (ESBL)-producing isolates from different patients (77 pulsed-field gel electrophoresis clones, 12 ESBL types) than in non-ESBL E. coli (26%) strains (P = 0.03). Among urinary tract isolates, the frequency of hypermutation was 40% in ESBL versus 26% in non-ESBL isolates (P = 0.03).

scholarly journals Prevalence and Relatedness of Escherichia coli O157:H7 Strains in the Feces and on the Hides and Carcasses of U.S. Meat Goats at Slaughter

2013 ◽  
Vol 79 (13) ◽  
pp. 4154-4158 ◽  
Author(s):  
M. E. Jacob ◽  
D. M. Foster ◽  
A. T. Rogers ◽  
C. C. Balcomb ◽  
M. W. Sanderson
Keyword(s):  
Escherichia Coli ◽  
Gel Electrophoresis ◽  
Pulsed Field Gel Electrophoresis ◽  
Processing Plant ◽  
Escherichia Coli O157 ◽  
Content Type ◽  
Pulsed Field ◽  
E Coli ◽  
Meat Goats ◽  
Multiple Sample

ABSTRACTWe determined the prevalences ofEscherichia coliO157:H7 in feces, hide, and carcasses of meat goats at a U.S. processing plant. Prevalences were 11.1%, 2.7%, and 2.7%, respectively. Sixteen pulsed-field gel electrophoresis (PFGE) subtypes were identified among 49E. coliO157:H7 isolates, some of which were present on multiple sample types or collection days.

scholarly journals Molecular typing of Escherichia coli O157[ratio ]H7 (H−) isolates from cattle in Japan

1999 ◽  
Vol 122 (2) ◽  
pp. 337-341 ◽  
Author(s):  
M. AKIBA ◽  
T. MASUDA ◽  
T. SAMESHIMA ◽  
K. KATSUDA ◽  
M. NAKAZAWA
Keyword(s):  
Escherichia Coli ◽  
Molecular Typing ◽  
Gel Electrophoresis ◽  
Pulsed Field Gel Electrophoresis ◽  
Escherichia Coli O157 ◽  
Outbreak Strain ◽  
Pulsed Field ◽  
E Coli ◽  
Biological Methods ◽  
Pfge Profiles

A total of 77 Escherichia coli O157[ratio ]H7 (H−) isolates from cattle in Japan were investigated by molecular biological methods. Most of these isolates (43 isolates) possessed the stx2 gene, but not stx1. Fifteen bacteriophage types and 50 pulsed-field gel electrophoresis (PFGE) profiles were observed. One isolate was indistinguishable from the human outbreak strain by these methods. This indicates that cattle must be considered as a possible source of human E. coli O157[ratio ]H7 infection in Japan.

scholarly journals ESKAPE Bacteria and Extended-Spectrum-β-Lactamase-Producing Escherichia coli Isolated from Wastewater and Process Water from German Poultry Slaughterhouses

2020 ◽  
Vol 86 (8) ◽  
Author(s):  
Mykhailo Savin ◽  
Gabriele Bierbaum ◽  
Jens Andre Hammerl ◽  
Céline Heinemann ◽  
Marijo Parcina ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Wastewater Treatment ◽  
Resistance Genes ◽  
Wastewater Treatment Plants ◽  
Process Water ◽  
Resistant Bacteria ◽  
Content Type ◽  
E Coli ◽  
Extended Spectrum ◽  
Clinically Relevant Bacteria

ABSTRACT The wastewater of livestock slaughterhouses is considered a source of antimicrobial-resistant bacteria with clinical relevance and may thus be important for their dissemination into the environment. To get an overview of their occurrence and characteristics, we investigated process water (n = 50) from delivery and unclean areas as well as wastewater (n = 32) from the in-house wastewater treatment plants (WWTPs) of two German poultry slaughterhouses (slaughterhouses S1 and S2). The samples were screened for ESKAPE bacteria (Enterococcus spp., Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Enterobacter spp.) and Escherichia coli. Their antimicrobial resistance phenotypes and the presence of extended-spectrum-β-lactamase (ESBL), carbapenemase, and mobilizable colistin resistance genes were determined. Selected ESKAPE bacteria were epidemiologically classified using different molecular typing techniques. At least one of the target species was detected in 87.5% (n = 28/32) of the wastewater samples and 86.0% (n = 43/50) of the process water samples. The vast majority of the recovered isolates (94.9%, n = 448/472) was represented by E. coli (39.4%), the A. calcoaceticus-A. baumannii (ACB) complex (32.4%), S. aureus (12.3%), and K. pneumoniae (10.8%), which were widely distributed in the delivery and unclean areas of the individual slaughterhouses, including their wastewater effluents. Enterobacter spp., Enterococcus spp., and P. aeruginosa were less abundant and made up 5.1% of the isolates. Phenotypic and genotypic analyses revealed that the recovered isolates exhibited diverse resistance phenotypes and β-lactamase genes. In conclusion, wastewater effluents from the investigated poultry slaughterhouses exhibited clinically relevant bacteria (E. coli, methicillin-resistant S. aureus, K. pneumoniae, and species of the ACB and Enterobacter cloacae complexes) that contribute to the dissemination of clinically relevant resistances (i.e., blaCTX-M or blaSHV and mcr-1) in the environment. IMPORTANCE Bacteria from livestock may be opportunistic pathogens and carriers of clinically relevant resistance genes, as many antimicrobials are used in both veterinary and human medicine. They may be released into the environment from wastewater treatment plants (WWTPs), which are influenced by wastewater from slaughterhouses, thereby endangering public health. Moreover, process water that accumulates during the slaughtering of poultry is an important reservoir for livestock-associated multidrug-resistant bacteria and may serve as a vector of transmission to occupationally exposed slaughterhouse employees. Mitigation solutions aimed at the reduction of the bacterial discharge into the production water circuit as well as interventions against their further transmission and dissemination need to be elaborated. Furthermore, the efficacy of in-house WWTPs needs to be questioned. Reliable data on the occurrence and diversity of clinically relevant bacteria within the slaughtering production chain and in the WWTP effluents in Germany will help to assess their impact on public and environmental health.

scholarly journals Extended-Spectrum-β-Lactamase- and Plasmid AmpC-Producing Escherichia coli Causing Community-Onset Bloodstream Infection: Association of Bacterial Clones and Virulence Genes with Septic Shock, Source of Infection, and Recurrence

2020 ◽  
Vol 64 (8) ◽  
Author(s):  
Inga Fröding ◽  
Badrul Hasan ◽  
Isak Sylvin ◽  
Maarten Coorens ◽  
Pontus Nauclér ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Septic Shock ◽  
Prostate Biopsy ◽  
Virulence Genes ◽  
Multivariable Analysis ◽  
Bloodstream Infections ◽  
Content Type ◽  
E Coli ◽  
Extended Spectrum ◽  
Community Onset

ABSTRACT Invasive infections due to extended-spectrum-β-lactamase- and pAmpC-producing Escherichia coli (ESBL/pAmpC-EC) are an important cause of morbidity, often caused by the high-risk clone sequence type (ST131) and isolates classified as extraintestinal pathogenic E. coli (ExPEC). The relative influence of host immunocompetence versus microbiological virulence factors in the acquisition and outcome of bloodstream infections (BSI) is poorly understood. Herein, we used whole-genome sequencing on 278 blood culture isolates of ESBL/pAmpC-EC from 260 patients with community-onset BSI collected from 2012 to 2015 in Stockholm to study the association of virulence genes, sequence types, and antimicrobial resistance with severity of disease, infection source, ESBL/pAmpC-EC BSI low-risk patients, and patients with repeated episodes. ST131 subclade C2 comprised 29% of all patients. Factors associated with septic shock in multivariable analysis were patient host factors (hematologic cancer or transplantation and reduced daily living activity), presence of the E. coli virulence factor iss (increased serum survival), absence of phenotypic multidrug resistance, and absence of the genes pap and hsp. Adhesins, particularly pap, were associated with urinary tract infection (UTI) source, while isolates from post-prostate biopsy sepsis had a low overall number of virulence operons, including adhesins, and commonly belonged to ST131 clades A, B, and subclade C1, ST1193, and ST648. ST131 was associated with recurrent episodes. In conclusion, the most interesting finding is the association of iss with septic shock. Adhesins are important for UTI pathogenesis, while otherwise low-pathogenic isolates from the microbiota can cause post-prostate biopsy sepsis.

Pulsed-Field Gel Electrophoresis Characterization of Shiga Toxin–Producing Escherichia coli O157 from Hides of Cattle at Slaughter

2002 ◽  
Vol 65 (7) ◽  
pp. 1172-1176 ◽  
Author(s):  
S. M. AVERY ◽  
A. SMALL ◽  
C.-A. REID ◽  
S. BUNCIC
Keyword(s):  
Escherichia Coli ◽  
Shiga Toxin ◽  
Gel Electrophoresis ◽  
Immunomagnetic Separation ◽  
Pulsed Field Gel Electrophoresis ◽  
Escherichia Coli O157 ◽  
Adult Cattle ◽  
Pulsed Field ◽  
E Coli ◽  
High Prevalence

Contamination of the brisket areas of the hides of healthy adult cattle with Shiga toxin–producing Escherichia coli O157 at slaughter in England was studied. In total, 73 cattle consignments comprising 584 animals delivered to one abattoir over 3 days during 1 week in July 2001 were studied: 26 cattle consignments arriving on Monday, 32 consignments arriving on Wednesday, and 15 consignments arriving on Friday. Consignment sizes ranged from 1 to 23 animals, with a mean consignment size of 8. The hide of the first animal to be slaughtered in each consignment was sampled by using a sponge swab moistened with 0.85% saline to rub an unmeasured brisket (ventral) area (ca. 30 by 30 cm). The process of isolating E. coli O157 from the swabs consisted of enrichment, screening with immunoprecipitation assay kits, and immunomagnetic separation. E. coli O157 was found on 24 of 73 (32.9%) cattle hides examined, and 21 of these 24 isolates produced Shiga toxins. The 24 E. coli O157 isolates produced six different pulsed-field gel electrophoresis profiles, and 18 (75%) of the isolates were of one prevalent clone. The high prevalence of one E. coli O157 clone on the hides of cattle at slaughter could be due to a high prevalence of that clone on the 18 farms involved (not investigated in the current study), in the postfarm transport or lairage environments, or both. Since the lairage environment, but not the farm of origin or the postfarm transport vehicle, was a factor common to all 18 cattle consignments, it could have played an important role in spreading the prevalent E. coli O157 clone to the cattle hides. Lairage pen floors and the stunning box floor were identified as the most probable sites along the unloading-to-slaughter route at which the brisket areas of cattle hides could become contaminated.

Molecular Characterization of Escherichia coli O157:H7 Hide Contamination Routes: Feedlot to Harvest

2006 ◽  
Vol 69 (6) ◽  
pp. 1240-1247 ◽  
Author(s):  
K. D. CHILDS ◽  
C. A. SIMPSON ◽  
W. WARREN-SERNA ◽  
G. BELLENGER ◽  
B. CENTRELLA ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Gel Electrophoresis ◽  
Side Wall ◽  
Pulsed Field Gel Electrophoresis ◽  
Marker Genes ◽  
Escherichia Coli O157 ◽  
Pulsed Field ◽  
E Coli ◽  
Side Rail

This study was conducted to identify the origin of Escherichia coli O157:H7 contamination on steer hides at the time of harvest. Samples were collected from the feedlot, transport trailers, and packing plant holding pens and from the colons and hides of feedlot steers. A total of 50 hide samples were positive for E. coli O157:H7 in two geographical locations: the Midwest (25 positive hides) and Southwest (25 positive hides). Hide samples were screened, and the presence of E. coli O157: H7 was confirmed. E. coli O157:H7 isolates were fingerprinted by pulsed-field gel electrophoresis and subjected to multiplex PCR procedures for amplification of E. coli O157:H7 genes stx1, stx2, eaeA, fliC, rfbEO157, and hlyA. Feedlot water trough, pen floor, feed bunk, loading chute, truck trailer side wall and floor, packing plant holding pen floor and side rail, and packing plant cattle drinking water samples were positive for E. coli O157:H7. Pulsed-field gel electrophoresis banding patterns were analyzed after classifying isolates according to the marker genes present and according to packing plant. In this study, hide samples positive for E. coli O157:H7 were traced to other E. coli O157:H7–positive hide, colon, feedlot pen floor fecal, packing plant holding pen drinking water, and transport trailer side wall samples. Links were found between packing plant side rails, feedlot loading chutes, and feedlot pens and between truck trailer, different feedlots, and colons of multiple cattle. This study is the first in which genotypic matches have been made between E. coli O157:H7 isolates obtained from transport trailer side walls and those from cattle hide samples within the packing plant.

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