Potential role of non-antibiotics (helper compounds) in the treatment of multidrug-resistant Gram-negative infections: mechanisms for their direct and indirect activities

2008 ◽  
Vol 31 (3) ◽  
pp. 198-208 ◽  
Author(s):  
Marta Martins ◽  
Sujata G. Dastidar ◽  
Seamus Fanning ◽  
Jette E. Kristiansen ◽  
Joseph Molnar ◽  
...  
Keyword(s):  
Potential Role ◽  
Multidrug Resistant ◽  
Gram Negative

scholarly journals The role of hospital environment in transmissions of multidrug-resistant gram-negative organisms

2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Po Ying Chia ◽  
Sharmila Sengupta ◽  
Anjanna Kukreja ◽  
Sasheela S.L. Ponnampalavanar ◽  
Oon Tek Ng ◽  
...  
Keyword(s):  
Multidrug Resistant ◽  
Hospital Environment ◽  
Gram Negative ◽  
Gram Negative Organisms

scholarly journals High Prevalence and Diversity of Cephalosporin-Resistant Enterobacteriaceae Including Extraintestinal Pathogenic E. coli CC648 Lineage in Rural and Urban Dogs in Northwest Spain

Antibiotics ◽  
2020 ◽  
Vol 9 (8) ◽  
pp. 468 ◽  
Author(s):  
Fátima Abreu-Salinas ◽  
Dafne Díaz-Jiménez ◽  
Isidro García-Meniño ◽  
Pilar Lumbreras ◽  
Ana María López-Beceiro ◽  
...  
Keyword(s):  
High Risk ◽  
Antimicrobial Resistance ◽  
One Health ◽  
Potential Role ◽  
Multidrug Resistant ◽  
E Coli ◽  
Rural And Urban ◽  
High Prevalence ◽  
Healthy Dogs

The aim of this work was to assess the prevalence of extended spectrum-β-lactamase (ESBL)- and carbapenemase-producing Enterobacteriaceae in fecal samples recovered from rural and urban healthy dogs in Northwest Spain (Galicia) to identify potential high-risk clones and to molecularly characterize positive isolates regarding the genes coding for ESBL/pAmpC resistance and virulence. Thirty-five (19.6%) out of 179 dogs were positive for cephalosporin-resistant Enterobacteriaceae, including Escherichiacoli and Klebsiella pneumoniae (39 and three isolates, respectively). All the isolates were multidrug resistant, with high rates of resistance to different drugs, including ciprofloxacin (71.4%). A wide diversity of ESBL/pAmpC enzymes, as well as E. coli phylogroups (A, B1, C, D, E, F and clade I) were found. The eight isolates (20.5%) found to conform to the ExPEC status, belonged to clones O1:H45-clade I-ST770 (CH11-552), O18:H11-A-ST93-CC168 (CH11-neg), O23:H16-B1-ST453-CC86 (CH6-31), and O83:H42-F-ST1485-CC648 (CH231-58), with the latter also complying the uropathogenic (UPEC) status. The three K. pneumoniae recovered produced CTX-M-15 and belonged to the ST307, a clone previously reported in human clinical isolates. Our study highlights the potential role of both rural and urban dogs as a reservoir of high-risk Enterobacteriaceae clones, such as the CC648 of E. coli and antimicrobial resistance traits. Within a One-Health approach, their surveillance should be a priority in the fight against antimicrobial resistance.

scholarly journals Potential role of the antimicrobial peptide Tachyplesin III against multidrug-resistant P. aeruginosa and A. baumannii coinfection in an animal model

2019 ◽  
Vol Volume 12 ◽  
pp. 2865-2874 ◽  
Author(s):  
Jialong Qi ◽  
Ruiyu Gao ◽  
Cunbao Liu ◽  
Bin Shan ◽  
Fulan Gao ◽  
...  
Keyword(s):  
Animal Model ◽  
Antimicrobial Peptide ◽  
Potential Role ◽  
Multidrug Resistant

Variable Sensitivity of Oral Isolates of Eikenella Corrodens to Serum Bactericidal Activity: Role of Antibody

1988 ◽  
Vol 2 (2) ◽  
pp. 346-353 ◽  
Author(s):  
C. Chen ◽  
M.E. Wilson
Keyword(s):  
Human Serum ◽  
Host Defense ◽  
Potential Role ◽  
Reference Strain ◽  
Alternative Pathway ◽  
Immune Defense ◽  
Classical Pathway ◽  
Eikenella Corrodens ◽  
Gram Negative

Eikenella corrodens is a facultatively anaerobic Gram-negative bacterium which is among the predominant cultivable microflora of periodontal lesions characterized by loss of attachment level. In the present study, we examined the potential role of complement-mediated killing in host defense against this periodontopathic organism. Seven clinical isolates obtained from human subgingival plaque and one reference strain of E. corrodens were characterized with respect to (a) susceptibility to the bactericidal properties of pooled human serum and (b) the role of the classical and/or alternative pathway(s) of complement in effecting killing of sensitive strains. Six strains, including the reference strain, were found to be variably serum-sensitive, exhibiting 1-12.5% survival after two hr of incubation in the presence of 20% pooled human serum. The remaining two isolates were serum-resistant. Both serum-resistant and serum-sensitive strains consumed complement via the classical pathway in normal but not in hypogammaglobulinemic serum, thus ruling out an antibody-independent mechanism of classical pathway activation. Four of six serum-sensitive strains exhibited little or no loss of viability following incubation with serum depleted of the classical pathway component Clq. One strain which was resistant to killing by normal human serum was, nevertheless, highly susceptible to complement-mediated killing in the presence of rabbit immune serum. Two additional serum-sensitive strains were killed, albeit to a lesser extent, in Clq-depleted serum, indicative of a role of the alternative pathway in killing of some serum-sensitive strains. These results indicate a potential role for complement-mediated killing in host defense against Gram-negative periodontal bacteria such as E. corrodens. However, the ultimate contribution of this immune defense mechanism may be defined, at least in part, by the presence of a humoral response to key bacterial membrane constituents.

Potential role of Indian long pepper (Piper longum L.) volatiles against free radicals and multidrug resistant isolates

2021 ◽  
pp. 1-5
Author(s):  
Manaswini Dash ◽  
Subhashree Singh ◽  
Bhaskar Chandra Sahoo ◽  
Suprava Sahoo ◽  
Rajesh Kumar Sahoo ◽  
...  
Keyword(s):  
Free Radicals ◽  
Potential Role ◽  
Multidrug Resistant ◽  
Piper Longum

Surveillance of multidrug-resistant gram-negative bacilli in a neonatal intensive care unit: prominent role of cross transmission

2007 ◽  
Vol 35 (4) ◽  
pp. 222-230 ◽  
Author(s):  
Caterina Mammina ◽  
Paola Di Carlo ◽  
Domenico Cipolla ◽  
Mario Giuffrè ◽  
Alessandra Casuccio ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Neonatal Intensive Care Unit ◽  
Neonatal Intensive Care ◽  
Multidrug Resistant ◽  
Gram Negative ◽  
Cross Transmission

Streptococcus salivarius Promotes Mucin Putrefaction and Malodor Production by Porphyromonas gingivalis

2006 ◽  
Vol 85 (10) ◽  
pp. 910-914 ◽  
Author(s):  
N. Sterer ◽  
M. Rosenberg
Keyword(s):  
Porphyromonas Gingivalis ◽  
Potential Role ◽  
Oral Microbiota ◽  
Streptococcus Salivarius ◽  
Oral Malodor ◽  
Gram Positive ◽  
Gram Negative ◽  
Sds Page ◽  
Micro Organisms

Although the contribution of the oral microbiota to oral malodor is well-documented, the potential role of Gram-positive micro-organisms is unclear. In the current study, we tested the hypothesis that Gram-positive micro-organisms contribute to malodor production by deglycosylating oral glycoproteins, rendering them susceptible to subsequent proteolysis. To this end, we examined the effect of Streptococcus salivarius on Porphyromonas gingivalis-mediated putrefaction of a model glycoprotein (pig gastric mucin). Malodor was scored by two odor judges, and volatile sulfides were determined with the use of a sulfide monitor. Mucin degradation was followed by electrophoresis on SDS-PAGE. Results showed that the addition of S. salivarius or β-galactosidase promoted mucin degradation and concomitant malodor production. Addition of glycosidic inhibitors (p-APTG and glucose) inhibited this process. These results suggest that Gram-positive micro-organisms such as S. salivarius contribute to oral malodor production by deglycosylating salivary glycoproteins, thus exposing their protein core to further degradation by Gram-negative micro-organisms.

Sign in / Sign up

Export Citation Format

Share Document