Abstract:
OBJECTIVE:Pseudomonas aeruginosa, an opportunistic pathogen, can cause serious health problems and produces several virulence factors. The most important of these factors is biofilm. Many studies suggest administration of new generation of antibiotics, as P. aeruginosa biofilm has developed high resistance to antimicrobial drugs. Emergence of multidrug resistant (MDR) strains has resulted in screening biofilm inhibitors from natural products or modified from natural compounds. To test this hypothesis, we evaluated the inhibitory effects (antibacterial and antibiofilm) of Juglans regia L. extract on biofilm formation by clinical isolates of P. aeruginosa. METHODS:Samples collected from burn, tracheal and urine infections of hospitalized patients (Shahid Motahari Hospital, Tehran, Iran) were identified as P. aeruginosa using traditional biochemical tests. Antibiotic susceptibility testing of isolates was performed using disk diffusion method. The microtiter plate method was used to evaluate the ability of pathogenic strains in producing biofilm. Antibacterial and antibiofilm effects of aqueous and methanol Juglans regia L. leaf extracts were determined by microtiter plate method. RESULTS:46.7% of P. aeruginosa isolates (n = 50) were resistant to gentamicin and 100% of them could form a biofilm. All isolates (100%) exhibited MDR phenotype. Various concentrations of Juglans regia L. extracts exhibited significant effects on the growth and biofilm inhibition of the isolates. In addition, aqueous Juglans regia L. leaf extract had better inhibition activity on planktonic growth, and methanol extract was more effective on inhibiting biofilm of P. aeruginosa. CONCLUSIONS:The results of this study indicate that antibiotic-resistant strains were significantly associated with biofilm formation. The J. regia L. extract, at various concentrations, may provide an alternative to control biofilm-related infections caused by P. aeruginosa. Further analyses are needed to validate the antibiofilm activity of these medicinal plants.
journal_name
Microb Pathogjournal_title
Microbial pathogenesisauthors
Dolatabadi S,Moghadam HN,Mahdavi-Ourtakand Mdoi
10.1016/j.micpath.2018.03.055subject
Has Abstractpub_date
2018-05-01 00:00:00pages
285-289eissn
0882-4010issn
1096-1208pii
S0882-4010(17)31531-0journal_volume
118pub_type
杂志文章abstract::E. coli infections in avian species have become an economic threat to the poultry industry worldwide. Several factors have been associated with the virulence of E. coli in avian hosts, but no specific virulence gene has been identified as being entirely responsible for the pathogenicity of avian pathogenic E. coli (AP...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2008.08.005
更新日期:2008-11-01 00:00:00
abstract::It was recently shown that, as in yeast, alcohols selectively increase the hemolytic properties of certain staphylococci strains. This phenomenon has been called 'microbial alcohol-conferred hemolysis'(MACH). Here we present the changes in gene expression by Staphylococcus aureus 8325-4, in response to ethanol. Ethano...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2009.11.002
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abstract:OBJECTIVES:This study focused on the comparative genomic analyses of two qnrVC6 carrying Pseudomonas spp. strains which might give us insights on the similarity and difference in the genomic contexts of qnrVC6 gene. METHODS:Comparative genomic analyses of the novel qnrVC6 carrying Pseudomonas spp. genomes with emphasi...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2018.07.026
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2007.08.001
更新日期:2008-01-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2015.10.002
更新日期:2015-12-01 00:00:00
abstract::Monocyte chemoattractant protein-1 (MCP-1), a chemoattractant for monocytes, is presumed to play a pivotal role in the recruitment and accumulation of monocytes in various diseases including pulmonary infections. We examined here whether or not Pseudomonas nitrite reductase (PNR), a recently identified IL-8 inducer in...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1999.0320
更新日期:2000-01-01 00:00:00
abstract::Hemoparasitic diseases like trypanosomiasis have an adverse influence on the health and working capability of infected animals. Monitoring and identification of blood born parasitic infections in dairy animals are of vital importance to get the optimum production. In this study blood samples were collected from Nili R...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2018.07.001
更新日期:2018-10-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.08.032
更新日期:2017-10-01 00:00:00
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journal_title:Microbial pathogenesis
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doi:10.1016/j.micpath.2016.06.033
更新日期:2016-09-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2016.02.021
更新日期:2016-06-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104171
更新日期:2020-07-01 00:00:00
abstract::Two-component regulatory proteins, histidine kinases and response regulators, function in bacteria as sensing and adaptive factors in response to a wide range of environmental stimuli. Conserved histidine and glycine regions of histidine kinase sensor proteins were used to design degenerate oligonucleotide primers for...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1998.0265
更新日期:1999-04-01 00:00:00
abstract::Recently, microbial exopolysaccharides (EPSs) have offered very large field for medical applications owing to their bioactive characteristics. This study aimed to obtain antitumor EPS and to optimize its production using different optimization approaches. Eighty EPSs-producing bacteria were obtained from mud samples. ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103947
更新日期:2020-03-01 00:00:00
abstract::Recent research has shown broad antifungal activity of the classic antidepressants selective serotonin reuptake inhibitors (SSRIs). This fact, combined with the increased cross-resistance frequency of the genre Candida regarding the main treatment today, fluconazole, requires the development of novel therapeutic strat...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.04.008
更新日期:2017-06-01 00:00:00
abstract::Fimbrial adhesins and hemolysins contribute to pathogenicity of extraintestinal Escherichia coli isolates causing urinary tract infections (UTI), sepsis and new born meningitis (NBM). Using gene cloning techniques and pulse field electrophoresis in combination with Southern hybridizations it was demonstrated that the ...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(90)90048-u
更新日期:1990-03-01 00:00:00
abstract::Ectoine, the most prominent osmolyte in nature, is a vital compatible solute present in halophilic bacterium. It protects the cellular biomolecules of the halophilic bacteria and retains their intrinsic function from extreme circumstances. In the current research, ectoine biosynthesis gene cluster (ectABC) in Bacillus...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.103693
更新日期:2019-11-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2014.09.013
更新日期:2014-11-01 00:00:00
abstract::Bovine tuberculosis (bTB) is usually diagnosed in vivo and ex vivo on the basis of delayed hypersensitivity reactions with a complex pool of antigens named bovine tuberculin (PPDB). The IFN-γ release assay (IGRA) for bTB is a blood-based assay that improves detection of infected cattle at early stages that escape skin...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.05.012
更新日期:2017-07-01 00:00:00
abstract::Pseudomonas aeruginosa is a notorious pathogen with increasing multi-drug resistance. This situation makes it urgent to develop a prophylactic vaccine against this pathogen. Different virulence factors play a crucial role in P. aeruginosa infection. This study focused on evaluation of the iron acquisition protein HitA...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.04.014
更新日期:2019-06-01 00:00:00
abstract::The essential oil from leaves of Croton grewioides Baill was obtained by hydrodistillation using Clevenger apparatus, and its chemical composition was analyzed by GC-MS, where 18 compounds were identified, mostly as monoterpenes (55.56%) and sesquiterpenes (44.44%), in which the major constituent was the α-pinene (47....
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.09.034
更新日期:2017-10-01 00:00:00
abstract::Pathogenic Salmonella strains have a set of virulence factors allowing them to generate systemic infections and damage in a variety of hosts. Among these factors, bacterial proteins secreted by specialized systems are used to penetrate the host's intestinal mucosa, through the invasion and destruction of specialized e...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.04.010
更新日期:2017-06-01 00:00:00
abstract::The focus of this study was the phenotypic characterization of Salmonella typhimurium mutants lacking the function of the response regulator mviA. The inactivation of mviA+ (mviA::kan) is shown to induce a significant change in the growth of most virulent strains, as reflected in the size of the colonies formed on aga...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1996.0117
更新日期:1997-06-01 00:00:00
abstract::The gene (ystB) encoding the novel subtype of the heat-stable enterotoxin (Y-STb) was cloned from the chromosome of a clinical isolate of Yersinia enterocolitica 84-50 (serotype O:5, biotype 1A) and the nucleotide sequence was determined. The ystB contained 216 base pairs that encoded a protein of 71 amino acid residu...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1006/mpat.1997.0146
更新日期:1997-10-01 00:00:00
abstract::A cytotoxin to Vero cells (Shiga-like toxin), which was neutralized by antibody against purified Shiga toxin produced by Shigella dysenteriae 1, was purified from Escherichia coli O157:H7, isolated from a patient with hemorrhagic colitis. The purification procedure consisted of ammonium sulfate fractionation, DEAE-cel...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(87)90076-3
更新日期:1987-05-01 00:00:00
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journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(91)90022-3
更新日期:1991-11-01 00:00:00
abstract::The enteropathogenic potential of 32 Vibrio cholerae O1 isolates that do not produce cholera toxin was examined in the orally inoculated, sealed adult mouse model. Live cultures (2 x 10(10) cfu/ml) of 7/16 clinical and 6/16 environmental isolates produced a positive intestinal fluid accumulation (FA) ratio that reache...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/0882-4010(92)90008-c
更新日期:1992-06-01 00:00:00
abstract:INTRODUCTION:Pneumococcal infections have caused morbidity and mortality globally. Streptococcus pneumoniae (pneumococci) are commensal bacteria that colonize the nasopharynx, asymptomatically. From there, pneumococci can spread in the lungs causing pneumonia and disseminate in the bloodstream causing bacteremia (sepsi...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2017.07.021
更新日期:2017-09-01 00:00:00
abstract::Aeromonosis is a fish disease that leads to haemorrhagic septicaemia and high mortality. The detection of early behavioural changes associated to this disease could be helpful in anticipating the initiation of treatment, increasing the probability of success. The influence of this disease on the hypothalamic-pituitary...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2019.05.017
更新日期:2019-07-01 00:00:00
abstract::The clinical implications of recently discovered porcine circovirus 3 (PCV3) infections are still unknown. The potential role of this emerging virus in reproductive loss in swine has been described. Herein, we report a high prevalence of PCV3 in mummified fetuses from sows maintained in modern farms in Rio Grande do S...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2020.104027
更新日期:2020-04-01 00:00:00
abstract::In the Staphylococcus aureus ATCC25923 strain, the flqB mutation in the 5'untranslated region (5'UTR) of the norA gene causes increased norA mRNA expression and high efflux activity (HEA). The involvement of the norA gene 5'UTR in HEA has not been explored in S. epidermidis; therefore, we examined the function of this...
journal_title:Microbial pathogenesis
pub_type: 杂志文章
doi:10.1016/j.micpath.2016.12.021
更新日期:2017-02-01 00:00:00