Resistant genes

Bài viết trình bày khảo sát hoạt tính kháng khuẩn của bốn kháng sinh β-lactam phối hợp mới ceftazidime-avibactam, ceftolozane-tazobactam, imipenem-relebactam, meropenem-vaborbactam trên các chủng trực khuẩn Gram âm đường ruột kháng carbapenem (Carbapenem-Resistant Enterobacteriaceae: CRE) và mối liên quan với kiểu gene mã hoá carbapenemase.

8p vipanly 26-11-2024 0 0   Download

Salmonella can carry multiple antibiotic-resistant and metalresistant genes and transmit these genes among strains worldwide. This study examined seventy-five Salmonella isolates from small-scale chicken farms (chicken feces, bedding, feed, wild animals) in Vinh Long province for the presence and relation of antibiotic and metal-resistance genes in these strains.

14p tuetuebinhan000 23-01-2025 3 2   Download

A total of 319 nasal swab samples were collected to clarify the prevalence and antimicrobial susceptibility of E. coli in the respiratory tract of goats in Can Tho, Vietnam. It indicated that E. coli was detected at a relatively minor rate (8.46%), and their prevalence in male goats and dairy goats was higher than that in others.

11p tuetuebinhan000 23-01-2025 4 2   Download

Enterococcus faecalis and E. faecium are prevalent pathogens in community and healthcare settings, often resistant to multiple antibiotics. This study aimed to assess the prevalence of virulence factors, drug resistance, and genetic determinants in clinical isolates in central Vietnam.

8p vihatake 06-01-2025 6 2   Download

Methicillin-resistant Staphylococcus aureus (MRSA) is one of the most predominant agents that cause nosocomial infections. Objectives: To determine the rate of MRSA and the molecular characteristics of the coagulase encoding gene of these isolates based on polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP).

6p viuchiha 03-01-2025 4 2   Download

Evaluating characteristics of beta-lactam resistance and distribution of genes encoding beta-lactamase of Escherichia coli and Klebsiella pneumoniae causing bloodstream infections at 108 Military Central Hospital (from October 2014 to march 2016).

27p kequaidan12 03-06-2021 22 4   Download

Analysis of the rate of resistance to Amoxicillin, Clarithromycin and efficacy of Esomeprazole-Amoxicilin-Clarithromycin (EAC) regimen in Helicobacter pylori positive duodenal ulcer. Determinate the recrudescence and reinfection status of Helicobacter pylori after successful eradication treatment, by PCR-RFLP technique and UreC gene sequencing.

27p kequaidan12 03-06-2021 18 4   Download

The objectives of the thesis: Identify Salmonella isolated from pork, beef, and chicken meat at the retail markets in Hanoi. Determining antibiotic resistance characteristics of isolated Salmonella.

26p extraenglish 24-05-2021 36 3   Download

The objectives of the thesis: Identify Salmonella isolated from pork, beef, and chicken meat at the retail markets in Hanoi; determining antibiotic resistance characteristics of isolated Salmonella; analysis of related gene categories in multi-antibiotic resistant Salmonella.

26p larachdumlanat129 20-01-2021 18 5   Download

The decoy approach against nuclear factor kB (NF-kB) is a useful tool to alter NF-kB dependent gene expression using synthetic oligonucleotides (ODNs) carrying NF-kB specific cis-elements. Unfortunately, ODNs are not stable and need to be extensively modified to be used in vivo or ex vivo. We have previously evaluated the possible use of peptide nucleic acids (PNAs) as decoy molecules. The backbone of PNAs is composed of N-(2-aminoethyl)glycine units, rendering these molecules resistant to both nucleases and proteases.

10p system191 01-06-2013 45 4   Download

Yellow stem borer has been identified as a major insect pest of deepwater rice, causing severe yield losses. Bt gene(s) from Bacillus thuringiensis have been proven very effective in pest resistance program. The use of transgenic plants expressing Bt gene(s) is now occupied effective approach to control insect infestation. We have successfully introduced a synthetic cryIA(b) gene into embryogenic calli of a deepwater indica rice variety, Vaidehi, by using the biolistic method of transformation.

6p zingzing09 24-04-2013 59 2   Download

A novel plasmid vector pSELECT-1 is described which can be used for highly efficient site-directed in vitro mutagenesis. The mutagenesis method is based on the use of single-stranded DNA and two primers, one mutagenic primer and a second correction primer which corrects a defect in the ampicillin resistance gene on the vector and reverts the vector to ampicillin resistance. Using T4 DNA polymerase and T4 DNA ligase the two primers are physically linked on the template. The non-mutant DNA strand is selected against by growth in the presence of ampicillin.

5p zingzing09 24-04-2013 65 5   Download

Leaf explants of Echinacea purpurea L. taken from aseptically germinated seedlings were inoculated with A. tumefaciens strains EHA105, carrying a binary vector conferring herbicide resistant bar gene and fungal resistant chitinase gene. Glufosinate ammonium‐resistant shoots were regenerated on a medium containing BAP and NAA at a concentration of 4.88 and 0.053 μM, respectively. A subsequent transfer of shoots to medium containing BAP was necessary for stem elongation and leaf development.

11p zingzing09 24-04-2013 41 3   Download

A novel cosmid (pABC6.5) whose DNA insert fromStrep-tomyces capreolus, the A201A antibiotic producer, overlaps the inserts of the previously reportedpCAR11 andpCAR13 cosmids, has been isolated. These two latter cosmids were known to contain the aminonucleoside antibiotic A201A resistance determinants ard2 and ard1, respectively. Together, these three cosmids have permitted the identifi-cation of a DNA stretch of 19 kbbetweenard1andard2, which should comprise a large region of a putative A201A biosynthetic (ata) gene cluster....

9p tumor12 22-04-2013 29 2   Download

The Tet repressor protein (TetR) regulates transcription of a family of tetracycline (tc) resistance determinants in Gram-negative bacteria. The resistance protein TetA, a membrane-spanning H + -[tcÆM]+ antiporter, must be sen-sitively regulated because its expression is harmful in the absence of tc, yet it has to be expressed before the drugs’ concentration reaches cytoplasmic levels inhibitory for protein synthesis.

13p tumor12 20-04-2013 41 4   Download

Botulinum neurotoxin type A (BoNT⁄A), the most toxic substance known to mankind, is produced by Clostridium botulinumtype A as a complex with a group of neurotoxin-associated proteins (NAPs) through polycis-tronic expression of a clustered group of genes. NAPs are known to protect BoNT against adverse environmental conditions and proteolytic digestion. Hemagglutinin-33 (Hn-33) is a 33 kDa subcomponent of NAPs that is resistant to protease digestion, a feature likely to be involved in the protec-tion of the botulinum neurotoxin from proteolysis. ...

10p awards 06-04-2013 33 3   Download

Juvenile hormones (JHs) of insects are sesquiterpenoids that regulate a great diversity of processes in development and reproduction. As yet the molecular modes of action of JH are poorly understood. TheMethoprene-tolerant (Met) gene of Drosophila melanogasterhas been found to be responsible for resistance to a JH analogue (JHA) insecticide, methoprene. Previous studies onMethave implicated its involvement in JH signaling, although direct evidence is lacking.

0p awards 05-04-2013 40 2   Download

We determined differentially expressed genes in HT29 human colon cancer cells, both after short treatment with methotrexate (MTX) and after the resistance to MTX had been established. Screening was performed using Atlas Human Cancer 1.2K cDNA arrays. The analysis was carried out using Atlasimage 2.01 andgenespring6.1 software.

15p awards 05-04-2013 40 2   Download

The gene encompassing ORF Rv1885c with weak sequence similarity to AroQ chorismate mutases (CMs) was cloned from the genome ofMycobac-terium tuberculosis and expressed in Escherichia coli. The gene product (*MtCM) complements a CM-deficient E. colistrain, but only if produced without the predicted N-terminal signal sequence typical ofM. tuberculosis. The mature *MtCM, which was purified by exploiting its resistance to irre-versible thermal denaturation, possesses high CM activity in vitro.

15p awards 05-04-2013 37 3   Download

Phosphoglyceratemutase (PGAM) activity inpromastigotes of theprotozoanparasiteLeishmaniamexicanais foundonly in the cytosol. It corresponds to a cofactor-independent PGAM as it is not stimulated by 2,3-bisphosphoglycerate and is susceptible to EDTA and resistant to vanadate. We have cloned and sequenced the gene and developed a convenient bacterial expression system and a high-yield purification protocol. Kinetic properties of the bacterially produced protein have been determined (3-phosphoglycer-ate:Km¼0.27 ± 0.02 mM, kcat ¼434 ± 54 s )1 ; 2-phos-phoglycerate:Km¼0.11 ± 0.

13p dell39 03-04-2013 46 4   Download