scholarly journals Investigation of blaKPC and blaNDM genes in enterobacteriaceae received in a public health laboratory

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Laisla Zanetoni Martins ◽  
Elisabete Cardiga Alves ◽  
Denise Fusco Marques ◽  
Ana Paula Lemos ◽  
Fernanda Modesto Tolentino Binhardi ◽  
...  
Keyword(s):  
Epidemiological Data ◽  
Bacterial Isolates ◽  
Beta Lactam ◽  
Enzymatic Mechanism ◽  
Beta Lactam Antibiotics ◽  
Carbapenem Resistant ◽  
Surveillance Cultures ◽  
And Gender ◽  
Biology Laboratory

Introduction: KPC and NDM carbapenemases production is an important enzymatic mechanism of resistance to carbapenens in bacteria belonging to the Enterobacteriaceae family. These enzymes degrade virtually all beta-lactam antibiotics and are encoded by the blaKPC and blaNDM genes, which can be in mobile genetic elements such as plasmids and transposons. Objectives: This study evaluated the positivity rate of the presence of blaKPC and blaNDM genes in carbapenem-resistant enterobacteria received at the Instituto Adolfo Lutz (IAL) of São José do Rio Preto, Brazil and determined the epidemiological data related to the patients whose isolates were recovered. Methods: From June 2015 to April 2019, bacterial isolates were obtained from different hospitals located in five municipalities in São José do Rio Preto region. In the bacteriology and molecular biology laboratory, DNA extraction and real-time PCR were performed to investigate the blaKPC and blaNDM genes. Afterwards, epidemiological data were surveyed such as the municipality of origin, age, and gender of the patients whose bacterial isolates were recovered. Results: A total of 934 enterobacteria isolates were recovered from the different hospitals. Of these; 93.4% were positive for blaKPC, with 96.3%, 1.85%, and 1.85% of the isolates belonged to the Klebsiella genus, Enterobacter genus, and Escherichia coli species, respectively. Also, 52.5% and 84.4% of the isolates were obtained from women and elderly patients, respectively. The blaNDM gene was detected only in three isolates, two of which originated from surveillance cultures. Conclusion: Therefore, KPC-producing enterobacteria are widespread in all health units of the five municipalities that were studied, suggesting that the blaKPC-carrying Klebsiella sp. isolates may be endemic in these institutions. Additionally, there is a significant role of surveillance cultures in preventing the spread of resistance genes, as observed for blaNDM in this study.

Molecular Detection of Carbapenem Resistant Gram Negative Bacterial Isolates from Dogs 

2021 ◽  
Author(s):  
Surya Sankar ◽  
Thresia . ◽  
Anu Bosewell ◽  
M. Mini
Keyword(s):  
Companion Animals ◽  
Multidrug Resistant ◽  
Beta Lactam ◽  
Gram Negative ◽  
Extended Spectrum Beta Lactamase ◽  
Beta Lactam Antibiotics ◽  
Carbapenem Resistant ◽  
Carbapenemase Gene ◽  
Line Of Therapy ◽  
Encoding Genes

Background: Carbapenems are beta-lactam antibiotics that are considered as the last line of therapy against multidrug resistant extended spectrum beta-lactamase. The resistance to carbapenems predominantly through carbapenemase is one of the most important emerging health problems worldwide in the therapy of clinical infections. The objective of the present study is to determine the presence of carbapenemase encoding genes among Gram- negative bacterial spp. associated with clinical infections in dogs. Methods: 30 Escherichia coli, 11 Klebsiella pneumoniae and three Pseudomonas aeruginosa isolated from urine, swabs from lesional skin and anterior vagina of dogs presented with different clinical ailments formed the samples for the study. Polymerase chain reaction was carried out to detect the presence of carbapenemase encoding genes viz., KPC, NDM, OXA, VIM and IMP among the isolates.Result: Out of the 44 Gram- negative isolates tested, 28 (76.3%) were positive for at least one tested carbapenemase gene. The highest frequency of carbapenemase recorded was for NDM followed by OXA-181, KPC, OXA-48 and VIM. Our study identified a high prevalence of carbapenemases among companion animals like dogs which could act as potential source of transmission of these resistance bacteria or their genomes to humans.

scholarly journals In Vivo Activity of QPX7728, an Ultrabroad-Spectrum Beta-Lactamase Inhibitor, in Combination with Beta-Lactams against Carbapenem-Resistant Klebsiella pneumoniae

2020 ◽  
Vol 64 (11) ◽  
Author(s):  
Mojgan Sabet ◽  
Ziad Tarazi ◽  
David C. Griffith
Keyword(s):  
Klebsiella Pneumoniae ◽  
Beta Lactamase ◽  
Beta Lactam ◽  
Beta Lactams ◽  
Bacterial Killing ◽  
Clinical Issue ◽  
Content Type ◽  
Beta Lactam Antibiotics ◽  
Carbapenem Resistant ◽  
Lactamase Inhibitor

ABSTRACT Resistance to beta-lactams has created a major clinical issue. QPX7728 is a novel ultrabroad-spectrum cyclic boronic acid beta-lactamase inhibitor with activity against both serine and metallo-beta-lactamases developed to address this resistance for use in combination with beta-lactam antibiotics. The objective of these studies was to evaluate the activity of QPX7728 in combination with multiple beta-lactams against carbapenem-resistant Klebsiella pneumoniae isolates in a neutropenic mouse thigh infection model. Neutropenic mice were infected with strains with potentiated beta-lactam MICs of ≤2 mg/liter in the presence of 8 mg/liter QPX7728. Two strains of carbapenem-resistant K. pneumoniae were tested with aztreonam, biapenem, cefepime, ceftazidime, ceftolozane, and meropenem alone or in combination with 12.5, 25, or 50 mg/kg of body weight of QPX7728 every 2 hours for 24 hours. Treatment with all beta-lactams alone either was bacteriostatic or allowed for bacterial growth. The combination of QPX7728 plus each of these beta-lactams produced bacterial killing at all QPX7728 doses tested. Overall, these data suggest that QPX7728 administered in combination with different partner beta-lactam antibiotics may have utility in the treatment of bacterial infections due to carbapenem-resistant K. pneumoniae.

Motile Aeromonas as agent of infections of the foot

1995 ◽  
Vol 85 (9) ◽  
pp. 505-508 ◽  
Author(s):  
M Wakabongo
Keyword(s):  
Second Generation ◽  
Antimicrobial Agents ◽  
Third Generation ◽  
Beta Lactam ◽  
Beta Lactam Antibiotics ◽  
Taxonomic Uncertainty ◽  
Post Traumatic ◽  
Third Generation Cephalosporins

Motile Aeromonas infections of the foot are caused mostly by post-traumatic incidence, occurring mostly during summer months. Serious complications such as osteomyelitis and amputation can result if the infections go untreated or are inadequately treated. The role of each species of motile Aeromonas in pathogenesis and response to antimicrobial agents is not well understood because of taxonomic uncertainty. As a group, motile Aeromonas respond well to aminoglycosides, second-generation and third-generation cephalosporins, quinolones, and some beta-lactam antibiotics.

scholarly journals Frequency and antimicrobial resistance of bacteria isolated from oral and topical medicaments from Hilla, Iraq

2012 ◽  
Vol 6 (06) ◽  
pp. 489-494 ◽  
Author(s):  
Alaa Hani Al-Charrakh
Keyword(s):  
High Resistance ◽  
Antimicrobial Agents ◽  
Pharmaceutical Products ◽  
High Rate ◽  
Diffusion Method ◽  
Bacterial Isolates ◽  
Beta Lactam ◽  
Disk Diffusion Method ◽  
Gram Negative ◽  
Beta Lactam Antibiotics

Introduction: The presence of microorganisms in pharmaceuticals is undesirable because they may cause spoilage of the product and may present an infection hazard to the consumers or patients.  Methodology: A total of 102 samples of oral and topical non-sterile pharmaceutical products were collected at random from different drug houses and pharmacies in Iraq, to investigate the microbial contamination of these products. Bacterial isolates recovered from these medicaments were subjected to susceptibility testing against various antibiotics by disk diffusion method according to Clinical and Laboratory Standards (CLSI) guidelines. Results: The results revealed that the occurrence of Gram-positive bacteria was in oral and topical medicaments while Gram-negative bacteria were only detected in topical medicaments. More than 58% of Bacillus isolates were resistant to lincomycin and Bacillus mycoides isolates were resistant to beta-lactam antibiotics and trimethoprim-sulfamethoxazole. Staphylococcus spp. showed a relatively high resistance to ampicillin, amoxicillin, penicillin, tetracycline, and trimethoprim-sulfamethoxazole. S. epidermidis had the highest number of multi-resistant isolates. Furthermore, 87.5% of isolated Gram-negative rods showed high resistance to beta-lactam antibiotics and 75% of them were highly resistant to erythromycin. One isolate of Pseudomonas aeruginosa was the most resistant among all Gram-negative rod isolates. Conclusion: The high rate of resistance to antimicrobial agents of bacterial isolates recovered from oral and topical medicaments in this study may indicate a widespread antibiotic resistance among bacteria isolated from different sources, including those of anthropological and environmental origin. 

Limited contribution of the outer-membrane penetration barrier towards intrinsic antibiotic resistance in Pseudomonas aeruginosa

1982 ◽  
Vol 28 (2) ◽  
pp. 169-175 ◽  
Author(s):  
R. Allan Scudamore ◽  
Morris Goldner
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibiotic Resistance ◽  
Outer Membrane ◽  
Cell Envelope ◽  
Growth Curves ◽  
Beta Lactam ◽  
Intrinsic Resistance ◽  
Beta Lactam Antibiotics ◽  
High Level

The role of the outer membrane (OM) was investigated in relation to the high level of intrinsic antibiotic resistance of Pseudomonas aeruginosa ATCC 9027. OM penetration barriers were measured by comparing turbidimetric growth curves of EDTA-treated and normal cells exposed to carbenicillin, moxalactam (LY 127935), gentamicin, tobramycin, rifampin, novobiocin, and vancomycin. OM barriers were also measured for carbenicillin and moxalactam in P. aeruginosa strain K 799/61, a hypersusceptible mutant presumed to have lost its penetration barrier in the cell envelope. Most antibiotics penetrated the OM efficiently and there was little difference between the two strains. The evidence therefore suggests that intrinsic resistance of P. aeruginosa, especially to the beta-lactam antibiotics, is not mainly due to the OM. A penetration barrier situated deeper within the cell envelope is hypothesized, the size of which in relation to any antibiotic may be estimated by comparing the IC50 values of EDTA-treated cells of the two strains.

Role of Aminoglycosides in Face of Introduction of New Beta-Lactam Antibiotics in Treatment of Nosocomial Infection

1983 ◽  
Vol 4 (6) ◽  
pp. 440-443
Author(s):  
John E. McGowan ◽  
David B. McClellan ◽  
Paula S. Irwin
Keyword(s):  
Nosocomial Infection ◽  
Wide Spectrum ◽  
Empiric Therapy ◽  
Beta Lactam ◽  
Beta Lactams ◽  
Suspected Sepsis ◽  
Single Drug ◽  
Beta Lactam Antibiotics ◽  
Susceptibility Profiles

AbstractAminoglycosides often are employed for empiric therapy of nosocomial infection because of their activity against a wide spectrum of gram-negative aerobic bacilli (GNAB). New beta-lactam antimicrobials also are active against many GNAB. As toxicity appears less likely for the beta-lactams than for aminoglycosides, their use might be preferable if susceptibility profiles were equivalent.We studied susceptibility of 90 GNAB recovered from blood culture during a three-month period. All were susceptible to aminoglycosides; 93% were susceptible to at least one of the following: ampicillin, carbenicillin, ticarcillin, cephalothin, chloramphenicol or trimethoprim-sulfamethoxazole. All were susceptible to at least one of our newer beta-lactams (cefamandole, cefoxitin, cefotaxime, moxalactam, piperacillin), but the percentage susceptible to any single beta-lactam was lower than that for any of the aminoglycosides tested. All of the isolates were susceptible to combinations of two beta-lactam drugs.In our hospital, beta-lactams may be reasonable alternatives to aminoglycosides in selected cases where susceptibility has been demonstrated. However, aminoglycosides continue to provide the broadest single-drug coverage for empiric therapy of known or suspected sepsis with GNAB. The utility of combinations of beta-lactam drugs for empiric therapy requires further assessment by clinical trials.

Sign in / Sign up

Export Citation Format

Share Document