scholarly journals Prevalence and characterisation of shigatoxigenic Escherichia coli isolated from beef cattle fed with prebiotics

2017 ◽  
Vol 6 (4) ◽  
Author(s):  
Luca Grispoldi ◽  
Filippo Bertero ◽  
Serena Franceschini ◽  
Francesco Mastrosimone ◽  
Paola Sechi ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Control Group ◽  
Treated Animal ◽  
Cattle Breeding ◽  
Animal Group ◽  
E Coli ◽  
Holstein Friesian ◽  
Sampling Session ◽  
Amoxicillin Clavulanic Acid ◽  
Single Cluster

Ten Holstein Friesian calves were divided into two groups of five: one group was given prebiotics in their food, while the other group served as the control group. Every two weeks from birth up to 18 months, samples of feces were taken from the rectal ampulla to determine the concentration of E. coli. At each sampling session, three aliquots per sample were collected. The arithmetic mean was calculated and all values (converted into logs) were analysed with GraphPad InStat for analysis of variance, followed by the Tukey-Kramer test. A total of 69 E. coli strains were detected, 29 (42.03%) from treated animals and 40 (57.97%) from the control group. The isolates were analysed by PCR for the presence of the stx-1, stx-2, hly and eae genes and by the Kirby Bauer test for susceptibility to the most commonly used antimicrobials in cattle breeding. Hierarchical clustering of the isolates was done using Ward’s method. Thirty samples were positive for the stx-1 gene, 18 for stx-2, 12 for both stx-1 and stx-2, 8 for hly, and 10 for eae. 4.3% were resistant to sulfamides, 8.6% to tetracycline, 1.4% to gentamicin, 94.6% to cephalothin, 2.8% to chloramphenicol, 13% to ampicillin, 13% to amoxicillin/clavulanic acid, 7.2% to sulphonamides, 4.3% to ceftriaxone, 5.7% to nalidixic acid, 34.7% to ticarcillin, 88.5% to erythromycin, and 5.7% to streptomycin. The isolates from the samples taken from day 210 to day 300 were grouped into a single cluster. Bacteriological examinations showed a reduction in the concentration of E. coli in the feces of the treated animals compared to the control group. The presence of strains with shigatoxigenic Escherichia coli virulence profiles and the reduction of these in the treated animal group demonstrated that diet can play an important role in reducing E. coli prevalence in cattle.

scholarly journals Molecular characterization and antimicrobial resistance of potentially human‐pathogenic Escherichia coli strains isolated from riding horses

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Pouya Reshadi ◽  
Fatemeh Heydari ◽  
Reza Ghanbarpour ◽  
Mahboube Bagheri ◽  
Maziar Jajarmi ◽  
...  
Keyword(s):  
Public Health ◽  
Escherichia Coli ◽  
Antimicrobial Resistance ◽  
Health Concern ◽  
Zoonotic Potential ◽  
Drug Resistant ◽  
Public Health Concern ◽  
E Coli ◽  
Pathogenic Escherichia Coli ◽  
Amoxicillin Clavulanic Acid

Abstract Background Transmission of antimicrobial resistant and virulent Escherichia coli (E. coli) from animal to human has been considered as a public health concern. This study aimed to determine the phylogenetic background and prevalence of diarrheagenic E. coli and antimicrobial resistance in healthy riding-horses in Iran. In this research, the genes related to six main pathotypes of E. coli were screened. Also, genotypic and phenotypic antimicrobial resistance against commonly used antibiotics were studied, then phylo-grouping was performed on all the isolates. Results Out of 65 analyzed isolates, 29.23 % (n = 19) were determined as STEC and 6.15 % (n = 4) as potential EPEC. The most prevalent antimicrobial resistance phenotypes were against amoxicillin/clavulanic acid (46.2 %) and ceftriaxone (38.5 %). blaTEM was the most detected resistance gene (98.4 %) among the isolates and 26.15 % of the E. coli isolates were determined as multi-drug resistant (MDR). Three phylo-types including B1 (76.92 %), A (13.85 %) and D (3.08 %) were detected among the isolates. Conclusions Due to the close interaction of horses and humans, these findings would place emphasis on the pathogenic and zoonotic potential of the equine strains and may help to design antimicrobial resistance stewardship programs to control the dissemination of virulent and multi-drug resistant E. coli strains in the community.

scholarly journals Possibility of application of dodicin hydrochloride in prevention of mastitis in cows

2006 ◽  
Vol 60 (3-4) ◽  
pp. 207-221
Author(s):  
Svetlana Joksovic ◽  
Vitomir Cupic ◽  
Vera Katic
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Streptococcus Agalactiae ◽  
Control Group ◽  
Main Approach ◽  
Laboratory Conditions ◽  
Streptococcus Uberis ◽  
Holstein Friesian ◽  
Experimental Group ◽  
Outer Environment

The main approach to curbing mastitis is to prevent the entry of microorganisms from the outer environment into the mammary gland, which is achieved by the use of papilla disinfection following every time of milking. The objective of this work was to examine the antimicrobial activity of the disinfectant dodicin hydrochloride, in fact the preparation that contains this disinfectant (DESU? M), against bacteria, the most frequent causes of mastitis in cows. The efficacy of modified DESU? Mwas examined under laboratory conditions using the quantitative test against the following microorganisms: Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae and Streptococcus uberis, under the conditions in the field. The udders of an experimental group of 20 cows of the Holstein-Friesian breed were immersed in a solution of the modified preparation DESU ? M following every time of milking over a period of three months. In the second group of 10 cows of the Holstein-Friesian breed, marked as the control group, no disinfection was applied following the milkings. The preparation DESU? Mexhibited satisfactory antimicrobial efficacy against the most frequent causes (Escherichia coli, Staphylococcus aureus, Streptococcus agalactiae and Streptococcus uberis) of mastitis in cows under laboratory conditions. With the application of the preparation DESU? M, following every time of milking over a period of three months, the number of somatic cells was reduced by almost one half in comparison with their number at the start of the experiment. No residue of the modified preparation DESU ? M were found in any sample of milk from the experimental group of cows.

Horizontal Transmission of Escherichia coli O157:H7 during Cattle Housing

2004 ◽  
Vol 67 (12) ◽  
pp. 2651-2656 ◽  
Author(s):  
P. McGEE ◽  
L. SCOTT ◽  
J. J. SHERIDAN ◽  
B. EARLEY ◽  
N. LEONARD
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Animal Behavior ◽  
Horizontal Transmission ◽  
Escherichia Coli O157 ◽  
E Coli ◽  
Holstein Friesian ◽  
Water Feed ◽  
Low Levels ◽  
The Right

Ruminant livestock, particularly cattle, is considered the primary reservoir of Escherichia coli O157:H7. This study examines the transmission of E. coli O157:H7 within groups of cattle during winter housing. Holstein Friesian steers were grouped in six pens of five animals. An animal inoculated with and proven to be shedding a marked strain of E. coli O157: H7 was introduced into each pen. Fecal (rectal swabs) and hide samples (900 cm2 from the right rump) were taken from the 36 animals throughout the study. Water, feed, and gate or partition samples from each pen were also examined. Within 24 h of introducing the inoculated animals into the pens, samples collected from the drinking water, pen barriers, and animal hides were positive for the pathogen. Within 48 h, the hides of 20 (66%) of 30 cohort animals from the six pens were contaminated with E. coli O157:H7. The first positive fecal samples from the noninoculated cohort animals were detected 3 days after the introduction of the inoculated steers. During the 23 days of the study, 15 of 30 cohort animals shed the marked E. coli O157: H7 strain in their feces on at least one occasion. Animal behavior in the pens was monitored during a 12-h period using closed circuit television cameras. The camera footage showed an average of 13 instances of animal grooming in each pen per hour. The study suggests that transmission of E. coli O157:H7 between animals may occur following ingestion of the pathogen at low levels and that animal hide may be an important source of transmission.

Escherichia coli ATCC 35218 as a Quality Control Isolate for Susceptibility Testing of Haemophilus influenzae with Haemophilus Test Medium

1999 ◽  
Vol 43 (2) ◽  
pp. 283-286 ◽  
Author(s):  
D. L. Butler ◽  
C. J. Jakielaszek ◽  
L. A. Miller ◽  
J. A. Poupard
Keyword(s):  
Escherichia Coli ◽  
Quality Control ◽  
Clavulanic Acid ◽  
Susceptibility Testing ◽  
Test Medium ◽  
E Coli ◽  
Mueller Hinton ◽  
Quality Control Testing ◽  
Amoxicillin Clavulanic Acid ◽  
Lactamase Inhibitor

ABSTRACT Current National Committee for Clinical Laboratory Standards (NCCLS) susceptibility guidelines for quality control testing withHaemophilus influenzae do not include a β-lactamase-producing strain that could detect the deterioration of the β-lactamase inhibitor components of amoxicillin-clavulanic acid, ampicillin-sulbactam, and piperacillin-tazobactam. The objective of the study was to determine if comparable quality control results forEscherichia coli ATCC 35218, a β-lactamase-producing strain, would be produced for the three β-lactam–β-lactamase inhibitor agents with Haemophilus test medium and Mueller-Hinton medium. The criteria used in this study to determine if Haemophilus test medium was acceptable for quality control testing of E. coli ATCC 35218 was that 100% of the results obtained with an antimicrobial agent-methodology combination needed to be within the acceptable NCCLS ranges established with Mueller-Hinton medium. The MIC testing results obtained by the broth microdilution and E-test methods with amoxicillin-clavulanic acid and piperacillin-tazobactam were all within the NCCLS ranges; however, the results obtained with ampicillin-sulbactam by both methods were not within the NCCLS ranges. Acceptable results were obtained by the disk diffusion methodology with ampicillin-sulbactam and piperacillin-tazobactam but not with amoxicillin-clavulanic acid. When performing susceptibility testing with H. influenzae with the β-lactam–β-lactamase inhibitors, in addition to quality control testing with H. influenzae ATCC 49247, testing of E. coli ATCC 35218 on Haemophilus test medium is an effective way to monitor the β-lactamase inhibitors in some antimicrobial agent-methodology combinations.

Protective Effect of Curcumin on Carbapenem-Resistant Escherichia coli–Induced Lung Injury in Rats

2016 ◽  
Vol 101 (7-8) ◽  
pp. 304-312 ◽  
Author(s):  
Cagla Bali ◽  
Nejat Altintas ◽  
Ozlem Ozmete ◽  
Ibrahim Gelincik ◽  
Hakan Yabanoglu ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Lung Injury ◽  
Intraperitoneal Injection ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Positive Control Group ◽  
Control Group ◽  
E Coli ◽  
Carbapenem Resistant

Curcumin has remarkable anti-inflammatory and antioxidant properties. The aim of this study was to investigate the protective effects of curcumin on a rat model of carbapenem-resistant Escherichia coli–induced acute lung injury (ALI). Thirty-two rats were randomly allocated to 4 groups to induce an ALI: negative control group (rats not infected with E coli with no antibiotic treatment), positive control group (rats infected with E coli with no antibiotic treatment), imipenem group (rats infected with E coli that received intraperitoneal injection of imipenem), and the imipenem+curcumin group (rats infected with E coli that received intraperitoneal injection of imipenem and were fed on curcumin).The rats were killed, and lung tissues samples were harvested for biochemical analyses and histopathologic examination. Total antioxidant status (TAS), total oxidant status (TOS), tumor necrosis factor α (TNFα), and interleukin-6 (IL6) were measured. TOS increased in the positive control group (P < 0.001) and decreased in the imipenem and imipenem+curcumin groups (P < 0.001 and P < 0.001, respectively). TAS decreased in the positive control group (P = 0.005). Imipenem treatment did not increase TAS, but the imipenem+curcumin group increased TAS (P = 0.014). TNFα and IL6 increased in the positive control group compared with the negative control group (P < 0.001 and P = 0.010, respectively). Imipenem decreased TNFα (P < 0.001), but did not decrease IL6 (P = 0.418). Imipenem+curcumin decreased TNFα (P < 0.001); this decrease was more pronounced compared with the imipenem group (P = 0.008). IL6 decreased in the curcumin group compared with the positive control group (P = 0.011). Curcumin combined with imipenem can be an alternative therapeutic agent to overcome the resistance of E coli strains.

Extended-spectrum resistance to β-lactams/β-lactamase inhibitors (ESRI) evolved from low-level resistant Escherichia coli

2019 ◽  
Author(s):  
Ángel Rodríguez-Villodres ◽  
María Luisa Gil-Marqués ◽  
Rocío Álvarez-Marín ◽  
Rémy A Bonnin ◽  
María Eugenia Pachón-Ibáñez ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Clavulanic Acid ◽  
Genomic Analysis ◽  
E Coli ◽  
Extended Spectrum ◽  
Copy Numbers ◽  
Resistance Patterns ◽  
Amoxicillin Clavulanic Acid

Abstract Objectives Escherichia coli is characterized by three resistance patterns to β-lactams/β-lactamase inhibitors (BLs/BLIs): (i) resistance to ampicillin/sulbactam and susceptibility to amoxicillin/clavulanic acid and piperacillin/tazobactam (RSS); (ii) resistance to ampicillin/sulbactam and amoxicillin/clavulanic acid, and susceptibility to piperacillin/tazobactam (RRS); and (iii) resistance to ampicillin/sulbactam, amoxicillin/clavulanic acid and piperacillin/tazobactam (RRR). These resistance patterns are acquired consecutively, indicating a potential risk of developing resistance to piperacillin/tazobactam, but the precise mechanism of this process is not completely understood. Methods Clinical isolates incrementally pressured by piperacillin/tazobactam selection in vitro and in vivo were used. We determined the MIC of piperacillin/tazobactam in the presence and absence of piperacillin/tazobactam pressure. We deciphered the role of the blaTEM genes in the new concept of extended-spectrum resistance to BLs/BLIs (ESRI) using genomic analysis. The activity of β-lactamase was quantified in these isolates. Results We show that piperacillin/tazobactam resistance is induced in E. coli carrying blaTEM genes. This resistance is due to the increase in copy numbers and transcription levels of the blaTEM gene, thus increasing β-lactamase activity and consequently increasing piperacillin/tazobactam MICs. Genome sequencing of two blaTEM-carrying representative isolates showed that piperacillin/tazobactam treatment produced two types of duplications of blaTEM (8 and 60 copies, respectively). In the clinical setting, piperacillin/tazobactam treatment of patients infected by E. coli carrying blaTEM is associated with a risk of therapeutic failure. Conclusions This study describes for the first time the ESRI in E. coli. This new concept is very important in the understanding of the mechanism involved in the acquisition of resistance to BLs/BLIs.

Trueperella pyogenes and Escherichia coli as an etiological factor of endometritis in cows and the susceptibility of these bacteria to selected antibiotics

2014 ◽  
Vol 17 (4) ◽  
pp. 657-664 ◽  
Author(s):  
P. Brodzki ◽  
M. Bochniarz ◽  
A. Brodzki ◽  
Z. Wrona ◽  
W. Wawron
Keyword(s):  
Escherichia Coli ◽  
Clavulanic Acid ◽  
Postpartum Period ◽  
Control Group ◽  
Inflammatory Condition ◽  
Bacterial Isolates ◽  
Inflammatory Lesions ◽  
E Coli ◽  
Susceptibility Tests ◽  
Experimental Group

AbstractThe aim of this study was to determine the percentage of participation of particular species of microorganisms, isolated from the uterus of cows with endometritis and from cows without inflammatory lesions of the uterus, in the same postpartum period. The aim of the study was also to examine how long after parturition non-treated endometritis persists. Moreover, antibiotic susceptibility tests were carried out of the bacterial isolates dominating in the uterus. Forty cows were included in the study: 20 cows with endometritis (experimental group) and 20 cows without any inflammatory condition of the uterus (control group). The material for cytological and bacteriological tests was collected on the 5th, 26th, 40thand 60thday after parturition, using an intrauterine brush adapted for cows. The total number of collected isolates was 149, including 120 isolates from the uterus of cows with endometritis and 29 isolates from the uterus of cows without endometritis. The following species of microorganisms were isolated from the material collected from cows with endometritis: T. pyogenes (49.2%), E.coli (22.5%), F. necrophorum (11.7%), Staphylococcus sp. (6.7%), B. melaninogenicus (5.8%), and Streptococcus sp. (4.1%). The participation percentage of particular species of bacteria in the material collected from the uterus of cows without endometritis was as follows: T. pyogenes (27.6%), E.coli (24.2%), Staphylococcus sp. (20.7%), Streptococcus sp. (20.7%), B. melaninogenicus (3.4%) and F. necrophorum (3.4%). The highest percentage of T. pyogenes isolates was susceptible to ceftiofur (89.6%); cefoperazone (85.1%) and amoxicillin combined with clavulanic acid (79.1%). E. coli isolates were most susceptible to amoxicillin combined with clavulanic acid (100%), cefoperazone (94.1%) and oxytetracycline (82.3%).

Molecular characterization of Escherichia coli isolates from patients with urinary tract infections in Palestine

2014 ◽  
Vol 63 (2) ◽  
pp. 229-234 ◽  
Author(s):  
Kamel Adwan ◽  
Naser Jarrar ◽  
Awni Abu-Hijleh ◽  
Ghaleb Adwan ◽  
Elena Awwad
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract ◽  
Urinary Tract Infections ◽  
Enterobacterial Repetitive Intergenic Consensus ◽  
The West ◽  
E Coli ◽  
Amoxicillin Clavulanic Acid ◽  
Tract Infections ◽  
Resistance Rates

Antibiotic resistance of Escherichia coli isolated from urinary tract infections (UTIs) is increasing worldwide. A total of 41 E. coli isolates were obtained from urine samples from hospitalized patients with a UTI in three hospitals in the northern districts of the West Bank, Palestine during March and June 2011. Resistance rates were: erythromycin (95 %), trimethoprim–sulfamethoxazole (59 %), ciprofloxacin (56 %), gentamicin (27 %), imipenem (22 %), amoxicillin (93 %), amoxicillin–clavulanic acid (32 %), ceftazidime (66 %) and cefotaxime (71 %). No meropenem-resistant isolates were identified in this study. Among the isolates, phylogenetic group B2 was observed in 13 isolates, D in 12 isolates, A in 11 isolates and B1 in five isolates. Thirty-five of the isolates were positive for an extended-spectrum β-lactamase phenotype. Among these isolates, the bla CTX-M gene was detected in 25, and eight harboured the bla TEM gene. None of the isolates contained the bla SHV gene. Transformation experiments indicated that some of the β-lactamase genes (i.e. bla CTX-M and bla TEM) with co-resistance to erythromycin and gentamicin were plasmid encoded and transmissible. Apart from this, enterobacterial repetitive intergenic consensus-PCR (ERIC-PCR) revealed that the 41 isolates were genetically diverse and comprised a heterogeneous population with 11 ERIC-PCR profiles at a 60 % similarity level.

scholarly journals Impact of Probiotic on the Number of Lactic Acid Rods Forming Hydrogen Peroxide Isolated From Porkers and on Changes in Drug Resistance of Selected Escherichia Coli Isolates

2012 ◽  
Vol 56 (1) ◽  
pp. 21-25 ◽  
Author(s):  
Marek Selwet ◽  
Mariola Galbas ◽  
Piotr Dullin
Keyword(s):  
Escherichia Coli ◽  
Hydrogen Peroxide ◽  
Drug Resistance ◽  
Lactic Acid ◽  
Control Group ◽  
Large White ◽  
E Coli ◽  
Probiotic Preparation ◽  
Hydrogen Oxide

Abstract The presented investigations were conducted on a group of 60 porkers of crossbreed Polish Landrace x Large White Polish. The animals were divided into two equal experimental groups. The control group (K) was fed diets without supplementation with probiotics, group (P) - diets with the addition of probiotic (0.2 kg t-1 feed). The aim of the study was to determine the effect of probiotic preparation on total numberof lactic acid rods from the Lactobacillus genus and those forming hydrogen oxide. The second part of experiment concerned the influence of probiotic preparation on the number, haemolytic ability and changes in drug resistance of Escherichia coli isolated from animal faeces. The significantly highest number of Lactobacillus sp. were determined in the saliva of porkers fed diets with the addition of probiotic, while the lowest in the control group. Lactobacillus sp. rods capable of forming hydrogen peroxide were isolated from 17 animals in group K and from three animals in group P. E. coli was determined in each examined sample of faeces. In groups K and P, counts of these bacteria were similar and did not differ statistically. High numbers of haemolytic isolates (haemolysis β) were found in faeces of animals fed diets with the addition of probiotic. Number and proportions of resistant isolates in groups K and P were different. Gentamicin was characterised by exceptionally high in vitro effectiveness. The used probiotic increased drug resistance of E. coli and increased frequency of incidence of haemolysis β.

scholarly journals Etiological and Resistance Profile of Bacteria Involved in Urinary Tract Infections in Young Children

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Antonio Sorlózano-Puerto ◽  
José María Gómez-Luque ◽  
Juan de Dios Luna-del-Castillo ◽  
José María Navarro-Marí ◽  
José Gutiérrez-Fernández
Keyword(s):  
Escherichia Coli ◽  
Urinary Tract Infection ◽  
Urinary Tract ◽  
Clavulanic Acid ◽  
Total Activity ◽  
Geographic Area ◽  
E Coli ◽  
Amoxicillin Clavulanic Acid ◽  
Tract Infections ◽  
Reduced Activity

Background.The objective of this study was to identify the bacteria most frequently responsible for urinary tract infection (UTI) in the population of under-2-year-olds in our geographic area and to evaluate the activity of antibiotics widely used for UTI treatment during a 4-year study period.Materials and Methods.A retrospective analysis was conducted of data on the identification and susceptibility of microorganisms isolated in urine samples from children under 2 years of age.Results.A total of 1,045 uropathogens were isolated.Escherichia coliaccounted for the majority (60.3%) of these, followed byEnterococcus faecalis(22.4%) andKlebsiellaspp. (6.5%). The highestE. colisusceptibility rates (>90%) were to piperacillin-tazobactam, cefuroxime, cefotaxime, ceftazidime, imipenem, gentamicin, nitrofurantoin, and fosfomycin, and the lowest were to amoxicillin-clavulanic acid and cotrimoxazole. Among all bacteria isolated, we highlight the overall high activity of piperacillin-tazobactam, imipenem, nitrofurantoin, and fosfomycin against both community and hospital isolates and the reduced activity of amoxicillin-clavulanic acid, cephalosporins, gentamicin, and cotrimoxazole. There was no significant change in the total activity of any of the studied antibiotics over the 4-year study period.Conclusion.Empiric treatment with amoxicillin-clavulanic acid, cotrimoxazole, cephalosporins, and gentamicin may be inadequate due to their limited activity against uropathogens in our setting.

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