MALDI‐TOF MS: an upcoming tool for rapid detection of antibiotic resistance in microorganisms

2013 ◽  
Vol 7 (11-12) ◽  
pp. 767-778 ◽  
Author(s):  
Markus Kostrzewa ◽  
Katrin Sparbier ◽  
Thomas Maier ◽  
Sören Schubert
Keyword(s):  
Antibiotic Resistance ◽  
Rapid Detection ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms

Investigation of the antibiotic resistance of staphylococcus species isolated from foods

2021 ◽  
Vol 67 (2) ◽  
pp. 3372-3382
Author(s):  
Brigitta Horváth ◽  
Ferenc Peles ◽  
Judit Gasparikné Reichardt ◽  
Edit Pocklán ◽  
Rita Sipos ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Methicillin Resistance ◽  
Multidrug Resistant ◽  
Farm Animals ◽  
The European Union ◽  
Methicillin Resistant ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms

The presence of methicillin-resistant Staphylococcus aureus (MRSA) strains in the food chain has been confirmed by several studies in the European Union, but there are only limited data available in Hungary. The objective of the present study was to investigate the antibiotic resistance of Staphylococcus strains isolated from foods, using classical microbiological, molecular biological methods and the MALDI-TOF-MS technique, as well as the multi-locus sequence typing (MLST) of antibiotic resistant strains. During the study, 47 coagulase-positive (CPS) and 30 coagulase-negative (CNS) Staphylococcus isolates were collected. In the course of the MALDI-TOF-MS investigations, all CPS isolates (n=47) were found to be S. aureus species, while 8 different species were identified in the case of the CNS strains. Methicillin resistance was confirmed in two S. aureus strains, one of which had a sequence type not yet known, while the other MRSA strain was type ST398, which is the most common type of MRSA strain isolated from farm animals in the EU/EEA. (The abbreviation “MRSA” is often used in common parlance, but occasionally in the literature to denote “multidrug-resistant Staphylococcus aureus”. In the authors’ manuscript - the methicillin-resistant pathogen is correctly designated as such. Ed.)

scholarly journals Stable isotope labelling: an approach for MALDI-TOF MS-based rapid detection of fluconazole resistance in Candida tropicalis

2019 ◽  
Vol 74 (5) ◽  
pp. 1269-1276 ◽  
Author(s):  
Saikat Paul ◽  
Shreya Singh ◽  
Arunaloke Chakrabarti ◽  
Shivaprakash M Rudramurthy ◽  
Anup K Ghosh
Keyword(s):  
Stable Isotope ◽  
Candida Tropicalis ◽  
Rapid Detection ◽  
Stable Isotope Labelling ◽  
Fluconazole Resistance ◽  
Isotope Labelling ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms

scholarly journals Antibiotic Resistance and Molecular Epidemiological Characteristics of Streptococcus agalactiae Isolated from Pregnant Women in Guangzhou, South China

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Zhaomin Cheng ◽  
Pinghua Qu ◽  
Peifeng Ke ◽  
Xiaohan Yang ◽  
Qiang Zhou ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Pregnant Women ◽  
Resistance Genes ◽  
Streptococcus Agalactiae ◽  
Virulence Genes ◽  
Mass Peak ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Epidemiological Characteristics ◽  
Tof Ms

Streptococcus agalactiae colonization in pregnant women can cause postpartum intrauterine infections and life-threatening neonatal infections. To formulate strategies for the prevention and treatment of S. agalactiae infections, we performed a comprehensive analysis of antibiotic resistance and a molecular-based epidemiological investigation of S. agalactiae in this study. Seventy-two S. agalactiae strains, collected from pregnant women, were subjected to antibiotic susceptibility tests; then, the screened erythromycin and clindamycin nonsusceptible isolates were used for macrolides and clindamycin resistance genes detection, respectively. Detection of resistance genes, serotyping, and determination of virulence genes were performed by polymerase chain reaction. The clonal relationships among the colonized strains were evaluated by multilocus sequence typing. Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) mass peak analysis was performed to discriminate the specific sequence types (STs). In our study, 69.4% and 47.2% of the strains were nonsusceptible to erythromycin and clindamycin, respectively; the multidrug resistance rate was 66.7%. All erythromycin nonsusceptible strains harbored resistance genes, whereas only 52.9% of the clindamycin nonsusceptible strains possessed the linB gene. Erythromycin resistance was mainly mediated by the ermB or mefA/E genes. Four serotypes were identified, and the most common serotype was serotype III (52.8%), followed by Ib (22.2%), Ia (18.0%), and II (4.2%). All the strains were divided into 18 STs that were assigned to nine clonal complexes. Most of the major STs were distributed into specific serotypes, including ST19/serotype III, ST17/serotype III, ST485/serotype Ia, ST862/serotype III, and ST651/serotype III. Analysis of virulence genes yielded seven clusters, of which bca-cfb-scpB-lmb (61.6%) was the predominant virulence gene cluster. Among all ST strains distributed in this region, only the ST17 strains had a mass peak at 7620 Da. The outcomes of this study are beneficial for the epidemiological comparison of colonized S. agalactiae in different regions and may be helpful for developing the strategies for the prevention of S. agalactiae infection in Guangzhou. Furthermore, our results show that MALDI-TOF MS can be used for the rapid identification of the ST17 strains.

scholarly journals RapidBurkholderia pseudomalleiidentification and antibiotic resistance determination by bacteriophage amplification and MALDI-TOF MS

Bacteriophage ◽  
2014 ◽  
Vol 4 (3) ◽  
pp. e29011 ◽  
Author(s):  
Christopher R Cox ◽  
Nicholas R Saichek ◽  
Herbert P Schweizer ◽  
Kent J Voorhees
Keyword(s):  
Antibiotic Resistance ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Tof Ms

Rapid detection and identification of strains carrying carbapenemases directly from positive blood cultures using MALDI-TOF MS

2014 ◽  
Vol 105 ◽  
pp. 98-101 ◽  
Author(s):  
Y. Hoyos-Mallecot ◽  
C. Riazzo ◽  
C. Miranda-Casas ◽  
M.D. Rojo-Martín ◽  
J. Gutiérrez-Fernández ◽  
...  
Keyword(s):  
Rapid Detection ◽  
Blood Cultures ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Detection And Identification ◽  
Tof Ms

Rapid detection of Lactococcus lactis isolates producing the lantibiotics nisin, lacticin 481 and lacticin 3147 using MALDI-TOF MS

2017 ◽  
Vol 139 ◽  
pp. 138-142 ◽  
Author(s):  
Tomás García-Cayuela ◽  
Teresa Requena ◽  
M. Carmen Martínez-Cuesta ◽  
Carmen Peláez
Keyword(s):  
Lactococcus Lactis ◽  
Rapid Detection ◽  
Maldi Tof Ms ◽  
Maldi Tof ◽  
Lacticin 3147 ◽  
Lacticin 481 ◽  
Tof Ms
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