1,721,016 research outputs found
Studio delle Proprietà Viscoelastiche di biofilm del genere Staphylococcus e valutazione dell???efficacia antibiofilm di oli essenziali
No full textStreptococcus mitis/Human gingival Fibroblasts co-culture: the best natural association for the biocompatibility evaluation of dental biomaterials
No full textMeasuring plant functional specialization in urban environments with Grime's CSR strategies
Full text linkBacterial isolates from infected wounds and their antibiotic susceptibility pattern: some remarks about wound infection
No full textWound infection plays an important role in the development of chronicity, delaying wound healing. This study aimed to identify the bacterial pathogens present in infected wounds and characterise their resistance profile to the most common antibiotics used in therapy. Three hundred and twelve wound swab samples were collected from 213 patients and analysed for the identification of microorganisms and for the determination of their antibiotic susceptibility. Patients with diverse type of wounds were included in this retrospective study, carried out from March to September 2012. A total of 28 species were isolated from 217 infected wounds. The most common bacterial species detected was Staphylococcus aureus (37%), followed by Pseudomonas aeruginosa (17%), Proteus mirabilis (10%), Escherichia coli (6%) and Corynebacterium spp. (5%). Polymicrobial infection was found in 59 (27·1%) of the samples and was mainly constituted with two species. The most common association was S. aureus/P. aeruginosa. All Gram-positives were susceptible to vancomycin and linezolid. Gram-negatives showed quite high resistance to the majority of antibiotics, being amikacin the most active against these bacteria. This study is mostly oriented to health care practitioners who deal with wound management, making them aware about the importance of wound infection and helping them to choose the adequate treatment options to control microbial infection in wounds
Effect of different titanium implant surfaces and compositions on porphyromonas gingivalis biofilm formation
No full textIn vitro activity of Aloe vera inner gel against microorganism grown in planktonic and sessile phase
No full textAloe barbadensis Miller (Aloe vera) is a herbal remedy widely used for a variety of illnesses. A large number of biological activities have been ascribed to A.vera leaf extracts to explain its purported health benefits, including antimicrobial, anti-inflammatory, lipid and glucose lowering, antiproliferative, immunostimulatory, and antioxidant functions. In the first part of our study, antimicrobial activity of A.vera inner gel was determined against a panel of Gram positive and negative bacteria (Staphylococcus aureus ATCC 29213, S.epidermidis ATCC 35984, Escherichia coli ATCC 8739, Pseudomonas aeruginosa ATCC 9027) and Candida albicans ATCC 10231. In addiction, being A.vera inner gel used in the treatment of peptic ulcer and in the treatment of dermatological and wound healing, A.vera inner gel was tested on planktonic and sessile phase of clinical Helicobacter pylori strains (including multi-drug-resistant strains) and against S.aureus and P.aeruginosa clinical isolates from leg ulcer
Effects of Extremely Low-Frequency Electromagnetic Fields on Helicobacter pylori Biofilm.
No full textThe aim of this work was to investigate the effects of exposure to extremely low-frequency electromagnetic
fields (ELF-EMF) both on biofilm formation and on mature biofilm of Helicobacter pylori. Bacterial cultures
and 2-day-old biofilm of H. pylori ATCC 43629 were exposed to ELF-EMF (50 Hz frequency–1 mT intensity)
for 2 days to assess their effect on the cell adhesion and on the mature biofilm detachment, respectively. All the
exposed cultures and the respective sham exposed controls were studied for: the cell viability status, the cell morphological analysis, the biofilm mass measurement, the genotypic profile, and the luxS and amiA gene expression. The ELF-EMF acted on the bacterial population during the biofilm formation displaying significant differences in cell
viability, as well as, in morphotypes measured by the prevalence of spiral forms (58.41%) in respect to the controls
(33.14%), whereas, on mature biofilm, no significant differences were found when compared to the controls. The
measurement of biofilm cell mass was significantly reduced in exposed cultures in both examined experimental conditions. No changes in DNA patterns were recorded, whereas a modulation in amiA gene expression was detected. An exposure to ELF-EMF of H. pylori biofilm induces phenotypic changes on adhering bacteria and decreases the cell
adhesion unbalancing the bacterial population therefore reducing the H. pylori capability to protect itself
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