Journal of Microbiology

Research Support, Non-U.S. Gov'ts

The Anti-influenza Virus Effect of Phellinus igniarius Extract: Sangmoo Lee , Jin Il Kim , Jun Heo , Ilseob Lee , Sehee Park , Min-Woong Hwang , Joon-Yong Bae , Mee Sook Park , Hyoung Jin Park , Man-Seong Park; J. Microbiol. 2013;51(5):676-681. Published online October 31, 2013; DOI: https://doi.org/10.1007/s12275-013-3384-2

8 View
0 Download
32 Citations

Abstract: Herbal medicine has been used in the orient for thousands of years to treat large and small ailments, including microbial infections. Although there are treatments for influenza virus infection, there is no treatment for drug-resistant viruses. It is time that we explored and exploited the multicomponent nature of herbal extracts as multi-drug combination therapies. Here, we present data on the anti-influenza virus effect of a medicinal mushroom, Phellinus igniarius. The P. igniarius water extract was effective against influenza A and B viruses, including 2009 pandemic H1N1, human H3N2, avian H9N2, and oseltamivir-resistant H1N1 viruses. Virological assays revealed that the extract may interfere with one or more early events in the influenza virus replication cycle, including viral attachment to the target cell. Therefore, our results provide new insights into the use of P. igniarius as an anti-influenza medicine.

Providencia Isolates Carrying blaPER-1 and blaVIM-2 Genes: Biofilm-Forming Capacity and Biofilm Inhibitory Concentrations for Carbapenem Antibiotics: Jungmin Kim , Shukho Kim , Hee Woo Lee , Sung Min Kim , Sung Yong Seol; J. Microbiol. 2011;49(3):512-515. Published online June 30, 2011; DOI: https://doi.org/10.1007/s12275-011-1221-z

6 View
0 Download

Abstract: Multidrug-resistant clinical isolates of Providencia carrying blaPER-1 and blaVIM-2 were evaluated for the abilities to form biofilm and high biofilm forming capacity was demonstrated in them. Minimum biofilm inhibitory concentrations (MBICs), minimum biofilm eradication concentrations (MBECs), and minimum inhibitory concentrations (MICs) for imipenem and meropenem were also determined. In all tested strains, the MBICs were higher than the MICs for both drugs. Interestingly, the MBICs and the MBEC50 for meropenem were lower than those for imipenem in the isolates producing high amounts of biofilm, suggesting that meropenem is superior to imipenem in the growth inhibition and eradication of biofilm forming Providencia strains.

Journal Article

Proteomic Analysis of Outer Membrane Proteins from Acinetobacter baumannii DU202 in Tetracycline Stress Condition: Sung-Ho Yun , Chi-Won Choi , Soon-Ho Park , Je Chul Lee , Sun-Hee Leem , Jong-Soon Choi , Soohyun Kim , Seung Il Kim; J. Microbiol. 2008;46(6):720-727. Published online December 24, 2008; DOI: https://doi.org/10.1007/s12275-008-0202-3

7 View
0 Download
53 Citations

Abstract: Acinetobacter baumannii readily developed antimicrobial resistance to clinically available antibiotics. A. baumannii DU202 is a multi-drug resistant strain, and is highly resistant to tetracycline (MIC>1,024μg/ml). The surface proteome of A. baumannii DU202 in response to the sub-minimal inhibitory concentration (subMIC) of tetracycline was analyzed by 2-DE/MS-MS and 1-DE/LC/MS-MS to understand the pathways that form barriers for tetracycline. Membrane expression of major outer membrane proteins (Omps) was significantly decreased in response to the subMIC of tetracycline. These Omps with sizes of 38, 32, 28, and 21 kDa were identified as OmpA38, OmpA32, CarO, and OmpW, respectively. However, transcription level of these Omps was not significantly changed. 1-DE/LC/MS-MS analysis of secreted proteins showed that OmpA38, CarO, OmpW, and other Omps were increasingly secreted at tetracycline condition. This result suggests that A. baumannii actively regulates the membrane expression and the secretion of Omps to overcome antibiotic stress condition.

Research Support, Non-U.S. Gov't

Isolation of Quinupristin/Dalfopristin-Resistant Streptococcus agalactiae from Asymptomatic Korean Women: Hye Ran Nam , Hak Mee Lee , Yeonhee Lee; J. Microbiol. 2008;46(1):108-111.; DOI: https://doi.org/10.1007/s12275-007-0217-1

6 View
0 Download
1 Citations

Abstract: Seven Streptococcus agalactiae isolates were obtained from the vagina of 80 asymptomatic women. Three of these isolates showed multi-drug resistant (MDR) phenotypes: two isolates were resistant to clarithromycin, clindamycin, erythromycin, and tetracycline; and one isolate was resistant to clarithromycin, clindamycin, erythromycin, tetracycline, and quinupristin/dalfopristin. There was no clonal relationship among the MDR isolates. This is the first report of quinupristin/dalfopristin-resistant S. agalactiae.

Genetic Relatedness within Streptococcus pneumoniae Serotype 19F and 23F Isolates in Korea by Pulsed-Field Gel Electrophoresis: Kwang Jun Lee , Song Mee Bae , Kyu Jam Hwang , Young Hee Lee , Ki Sang Kim; J. Microbiol. 2003;41(1):1-6.

14 View
0 Download

Abstract: The genetic relatedness of multidrug-resistant pneumococcal isolates of serotypes 19F and 23F was investigated. The DNA fragments digested with Sma I were resolved by pulsed-field gel electrophoresis (PFGE). PFGE analysis of 36 S. pneumoniae isolates showed 13 different patterns. Among 22 isolates of serotype 19F, 9 different PFGE patterns were present and 14 isolates of serotype 23F isolates represented 5 distinct PFGE patterns. Two isolates of serotype 19F and six isolates of serotype 23F shared the same PFGE pattern (Pattern I). Based on the genetic relatedness within the strains (one genetic cluster was defined as having more than 85% homology), we divided the pneumococcal strains into 6 genetic clusters (I, II, III, IV, V, and VI). The 22 strains of serotype 19F belonged to five distinct genetic clusters (I, II, III, IV, V and VI) and 14 strains of serotype 23F represented two genetic clusters (I and II ). These results showed that strains of serotype 19F are genetically more diverse than those of serotype 23F. Serotype 19F isolates with PFGE patterns H and I appeared to be less related to those of the remaining PFGE patterns (A to G) (less than 60% genetic relatedness), but those strains were genetically closely related with serotype 23F. These results suggest that the latter isolates originated from horizontal transfer of the capsular type 19F gene locus to 23F pneumococcal genotypes. In conclusion, the multidrug-resistant pneumococcal isolates of serotype 19F and 23F isolated in Korea are the result of the spread of a limited number of resistant clones.

First
Prev
Page of 1
Next
Last

Search