An improved carbapenem inactivation method, CIMTrisII, for carbapenemase production by Gram-negative pathogens.

This study describes an improved carbapenem inactivation method, CIMTrisII, for detecting carbapenemase production by Gram-negative pathogens, including Enterobacteriaceae, Acinetobacter and Pseudomonas species. CIMTrisII was different from CIMTris in the concentration of Meropenem disks (5-µg MEM disks vs. 10-µg MEM disks), the inoculum volume of the bacteria (a 5-µl loopful vs. a 10 µl loopful) and the incubation time (1 vs. 2 h). CIMTrisII showed an overall sensitivity of 99.3 % and an overall specificity of 95.0 % for tested isolates. In comparison, CIMTris showed a sensitivity of 96.1 % and a specificity of 96.3 %, and mCIM showed a sensitivity of 67.1 % and a specificity of 100 %. CIMTrisII is thus deemed useful for detecting carbapenemase production by Gram-negative pathogens. PMID: 30526741 [PubMed - as supplied by publisher]
Source: Journal of Medical Microbiology - Category: Microbiology Authors: Tags: J Med Microbiol Source Type: research

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ConclusionCirculating MDR A. baumannii exhibit genetic heterogeneity with variations in the structure and content of genomic A. baumannii resistance islands and encode multiple putative ARGs. This report represents the first clonal subtype information and genomic characterization of MDR A. baumannii in the country of Georgia and may inform future epidemiological investigations.
Source: Journal of Global Antimicrobial Resistance - Category: Infectious Diseases Source Type: research
In this study, gold nano-star was synthesized and used for bio-conjugation with pDNA toward the detection of target sequences. Synthesized probe (5ʹ TTG TGA ACT ATT TAC GTC AGC ATG C3ʹ) of Acinetobacter baumannii was found with excellent sensitivity. After the hybridization of pDNA with cDNA, target DNA (5ʹ GCA TGC TGA CGT AAA TAG TTC ACA A 3ʹ) was easily measured. According to ultra-sensitivity of the engineered optical DNA-based bio-assay, it is potentially applied in the bacterial detection of the environmental and clinical specimens. Here, the selection of engineered biosensor in the presence of two mismatch sequen...
Source: Enzyme and Microbial Technology - Category: Biotechnology Source Type: research
ConclusionsTherapeutic drug monitoring-guided meropenem may be a sound new therapeutic option in eradicating multidrug resistant Acinetobacter and offer a novel therapeutic option in the field of personalized medicine.
Source: Respiratory Medicine Case Reports - Category: Respiratory Medicine Source Type: research
This study investigated the effect of phytic acid and lysozyme on the microbial composition and quality of grass carp (Ctenopharyngodon idellus) fillets stored at 4 °C. The control, 0.5 mg/mL lysozyme-treated fillets (T1), 0.5 mg/mL phytic acid-treated fillets (T2) and 0.25 mg/mL lysozyme + 0.25 mg/mL phytic acid-treated fillets (T3) were evaluated based on sensory assessment, biogenic amines, ATP-related compounds, total volatile basic nitrogen (TVB-N), and total viable counts (TVC). Changes in microbial composition were analyzed using high-throughput sequencing. Results showed that phytic acid and lyso...
Source: Food Microbiology - Category: Food Science Authors: Tags: Food Microbiol Source Type: research
In this study, sufu samples were periodically collected during the whole fermentation to investigate the dynamic changes of fungal and bacterial communities using high-throughput sequencing technology. The overall process can be divided into pre- and post-fermentation. During post-fermentation, the pH value showed a gradual decrease over time while the amino nitrogen content increased. Trichosporon, Actinomucor and Cryptococcus were the main genera in pre-fermentation while Monascus and Aspergillus were dominant in post-fermentation. This huge shift in fungal composition was caused by process procedure of pouring dressing ...
Source: Food Microbiology - Category: Food Science Authors: Tags: Food Microbiol Source Type: research
One of the most important challenges facing medical science is to better understand the cause of neuronal pathology in neurodegenerative diseases. Such is the case for Huntington’s disease (HD), a genetic disorder primarily caused by a triplet expansion in the Huntingtin gene (HTT). Although aberrant HTT is expressed from embryogenesis, it remains puzzling as to why the onset of disease symptoms manifest only after several decades of life. In the present study, we investigated the possibility of microbial infection in brain tissue from patients with HD, reasoning that perhaps mutated HTT could be deleterious for immu...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
What strategies helped one ICU control and eliminate drug-resistant A. baumanii infections?Emerging Infectious Diseases
Source: Medscape Today Headlines - Category: Consumer Health News Tags: Infectious Diseases Journal Article Source Type: news
This study aimed to target adeB gene with antisense peptide nucleic acid (PNA) and investigate its effect on resistance to antibiotics. NCBI database was used to design appropriate PNA to target adeB gene, by connecting PNA to mRNA, the translation of mRNA can be prevented. Three clinical isolates and A. baumannii ATCC 17978 were treated with the designed PNA by electroporation and competence procedure. Minimum Inhibitory concentration (MIC) of ciprofloxacin, colistin, and tetracycline were determined by microbroth dilution method. In addition, the expression level of adeB gene was measured by quantitative real-time PCR (q...
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
ConclusionsThis study shows that the alveolar microbiota profile in BAL samples from TB and IP patients, representing infectious and non-infectious lung diseases, respectively, is characterized by decreased diversity.
Source: Microbial Pathogenesis - Category: Infectious Diseases Source Type: research
In this study, 75 strains from oily sludge were isolated with oil degradation activity for edible oil-contained wastewater. Eight isolates were able to grow well in liquid cultures with edible oil as the sole carbon source and discovered with high efficient oil-degrading ability. Seven out of eight isolates were identified asAcinetobacter and one isolate asKluyvera cryocrescens, based on their 16S rRNA gene sequences. Three highly efficient oil degrading bacteria (Acinetobacter dijkshoorniae LYC46-2,Kluyvera cryocrescens LYC50-1a andAcinetobacter pittii LYC73-4b) were selected and their degradation characteristic were exam...
Source: World Journal of Microbiology and Biotechnology - Category: Microbiology Source Type: research
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