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Klebsiella pneumoniae atcc 700603

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Klebsiella pneumoniae ATCC 700603 is a bacterial strain from the American Type Culture Collection. It is a well-characterized reference strain for research and microbial identification purposes.

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9 protocols using klebsiella pneumoniae atcc 700603

1

Antibacterial Evaluation of Compounds

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The antibacterial activity of each compound was evaluated using six bacterial strains: three strains of Gram-positive (Staphylococcus aureus ATCC 292313, Bacillus subtilis ATCC 6633, and Enterococcus faecalis ATCC 29212) and three strains of Gram-negative (Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Klebsiella pneumoniae ATCC 700603) bacteria. The bacterial strains were purchased from American Type Culture Collection (ATCC) (Manassas, VA, USA).
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2

Antimicrobial Potential of Beech Bark Extract

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The beech bark used for experimental research comes as waste from a wood processing company from Vatra Dornei, Romania. Before the extraction process, the bark was dried under normal temperature and aeration conditions (room temperature), and ground using a grinding mill type VEB NOSSENER MASCHINENBAU 1980. After grinding, the plant product was sieved through sieve 5.
Silver nitrate (AgNO3, M—169.87 g/mol, d—4.35 g/cm³), silver acetate (AgC2H3O2, M—166.91 g/mol, d—3.26 g/cm³), Folin–Ciocalteu reagent, potassium bromide (KBr), and methanol were purchased from Merck Company (Darmstadt, Germany), 2,2’-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid)-(ABTS) was from Sigma-Aldrich (Steinheim, Germany), 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) were obtained from Alfa-Aesar (Karlsruhe, Germany).
The following bacterial reference strains, stored at −70 °C in the Microbiology Laboratory from UMFST Târgu Mureș, were used: S. aureus ATCC (American Type Culture Collection) 25923, methicillin-resistant S. aureus (MRSA) ATCC 43300, E. coli ATCC 25922, Klebsiella pneumoniae ATCC 700603, P. aeruginosa ATCC 27853.
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3

Antimicrobial Assessment of Metal Compounds

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LB media, zinc gluconate (TCI chemicals Pvt. Ltd, India), ferrous chloride (Sigma-Aldrich) were procured from the respective commercial sources. Staphylococcus aureus-ATCC 25923;
Escherichia coli-ATCC 25922; Pseudomonas aeruginosa-ATCC 27853 and Klebsiella pneumoniae-ATCC 700603 were purchased from ATCC, USA. Clinical specimens were obtained from PGIMER, Chandigarh after receiving the requisite ethics committee approval.
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4

Antimicrobial Susceptibility Testing Protocol

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The Acinetobacter baumannii ATCC BAA-1605, Candida albicans ATCC 10231, Enterococcus faecium ATCC 700221, Klebsiella aerogenes ATCC 13048 (previously known as Enterobacter aerogenes), Klebsiella pneumoniae ATCC 700603, Pseudomonas aeruginosa ATCC 9027, Staphylococcus aureus ATCC 25923 and MRSA ATCC 33591, were acquired from the American Type Culture Collection (ATCC). Before running the tests, beads with cryo-protected microorganisms were transferred into fresh MHB (BioMaxima, Lublin, Poland) for bacteria or RPMI-1640 for fungi and incubated for 24 h at 37 °C. Then, the culture was seeded on the Mueller-Hinton agar (MHA) plates (BioMaxima, Lublin, Poland) for bacteria or Sabouraud dextrose agar (SDA) plates (BioMaxima, Lublin, Poland) for fungi and incubated as just mentioned. Cell densities for all assays were adjusted spectrophotometrically (Multiskan™ GO Microplate Spectrophotometer, Thermo Fisher Scientific, Vantaa, Finland) at 600 nm for bacteria and at 530 nm for fungi.
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5

Bacterial Strain Acquisition and Storage Protocol

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Klebsiella oxytoca (ATCC 49131) and Klebsiella pneumoniae (ATCC 700603) were purchased from the American Type Culture Collection (ATCC).
Staphylococcus aureus (CIP 4.83), methicillin-resistant Staphylococcus aureus MRSA (CIP 107422), Escherichia coli (CIP 53.126), Acinetobacter baumannii (CIP 70.34), Pseudomonas aeruginosa (CIP 82.118), Enterococcus cloacae (CIP 103475), and Enterococcus faecium (CIP 102379) were purchased from “Collection de l’Institut Pasteur” (CIP, Pasteur Institute Collection).
Master stocks of bacterial strains were stored in a −80 °C freezer.
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6

Antimicrobial Susceptibility Testing Protocol

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The bacterial strains E. coli ATCC 25922, Pseudomonas aeruginosa ATCC 29212, and Klebsiella pneumoniae ATCC 700603 were obtained from ATCC (American Type Culture Collection, Manassas, VA). Metallo-β-lactamase (NDM1) clinical isolates, K. pneumoniae, and Acinetobacter baumannii, obtained from hospital settings, were also included in the study. Cation-adjusted Mueller-Hinton broth (MHB; Becton-Dickinson, Cockeysville, MD) was used for minimum inhibitory concentration (MIC) determination. Mueller-Hinton agar (MHA; Becton-Dickinson) was used for minimum bactericidal concentration (MBC) studies. Trypticase soy agar (TSA; Becton-Dickinson) was used for culturing of bacteria and colony counts.
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7

Isolation and Characterization of Bacterial Strains

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Ten clinical isolations of S. aureus were collected from patients admitted in the Third Xiangya Hospital of Central South University. S. aureus Newman and ATCC 43300 were provided by Min Li (Shanghai Jiao Tong University, Shanghai, China). Staphylococcus epidermidis RP62A (ATCC 35984) was provided by Di Qu (Fudan University, Shanghai, China). Pseudomonas aeruginosa PAO1 (ATCC 15692) was obtained from Mingqiang Qiao (Nankai University, Tianjin, China). Enterococcus faecalis ATCC 29212, A. baumannii ATCC 1195, Klebsiella pneumoniae ATCC 700603, Escherichia coli ATCC 25922, and S. aureus ATCC 29213 were purchased from the American Type Culture Collection. S. aureus and S. epidermidis strains were grown in tryptic soy broth (TSB) (Solarbio, Beijing, China) medium. E. faecalis strain was cultured in brain–heart infusion broth (Solarbio) medium. Other strains were grown in Luria–Bertani broth (Solarbio) medium.
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8

Microbial Culture Propagation Protocol

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Cultures of Pseudomonas aeruginosa ATCC 27853, Staphylococcus aureus ATCC 43300 (MRSA), Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603 and Candida albicans ATCC 64124 were purchased from the American Type Culture Collection (ATCC). The propagation conditions for the isolates were followed as recommended by the ATCC, and isolates were preserved at 4 °C.
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9

Metallo-beta-Lactamase Producing Isolates

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A total of 37 MBL-producing Enterobacterales isolates were selected from either the CDC & FDA Antibiotic Resistance Isolate Bank (n=36) or from CDC’s internal collection of clinical isolates (n=1) (Table 1). MBL genes (blaIMP, blaNDM, or blaVIM) were confirmed by WGS or real-time PCR. All isolates had interpretations of intermediate or resistant for aztreonam (≥8 mg/L) and ceftazidime/avibactam (≥16/4 mg/L) according to CLSI’s M100 30th edition interpretive criteria.13 The following QC strains were used for susceptibility testing: Escherichia coli ATCC 35218, E. coli ATCC 25922, Klebsiella pneumoniae ATCC 700603, Pseudomonas aeruginosa ATCC 27853, and Staphylococcus aureus ATCC 29213 (American Type Culture Collection, Manassas, VA).
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