Search results for "Microbio"
showing 10 items of 8741 documents
Preceding Host History of Conjugative Resistance Plasmids Affects Intra- and Interspecific Transfer Potential from Biofilm
2023
Conjugative plasmids can confer antimicrobial resistance (AMR) to their host bacterium. The plasmids disperse even between distantly related host species, rescuing the host from otherwise detrimental effects of antibiotics. Little is known about the role of these plasmids in the spread of AMR during antibiotic treatment. One unstudied question is whether the past evolutionary history of a plasmid in a particular species creates host specificity in its rescue potential or if interspecific coevolution can improve interspecific rescues. To study this, we coevolved the plasmid RP4 under three different host settings; solely Escherichia coli or Klebsiella pneumoniae, or alternating between both …
POTENTIAL IMPACT OF A NONAVALENT VACCINE ON HPV RELATED LOW-AND HIGH-GRADE CERVICAL INTRAEPITHELIAL LESIONS
2016
Introduction: Demonstration of the role of persistent infection, with high-risk (HR) human papillomaviruses (HPV) as the causal agent of cervical cancer made the development of first and second generation prophylactic vaccines. Bivalent and quadrivalent HPV vaccines are at the moment available in Europe. In 2014 is licensing a nonavalent HPV vaccine against HPV types: 6/11/16/18/31/33/45/52/58. The aim of our study was to evaluate the potential impact on HPV infection and related low- and high-grade cervical lesions (LSIL, HSIL) of the candidate nonavalent HPV vaccine, compared to the impact of the quadrivalent, in a female population living in Sicily. Materials and Methods: HPV genotypes w…
Vesiclepedia:A Compendium for Extracellular Vesicles with Continuous Community Annotation
2012
Vesiclepedia is a community-annotated compendium of molecular data on extracellular vesicles.
Patrones estructurales y funcionales de las comunidades de procariotas en humedales mediterráneos y su relación con el ciclo del carbono
2023
Las zonas húmedas mediterráneas juegan un papel muy importante en los ciclos biogeoquímicos, ya que la presencia de agua, de forma constante o transitoria, favorece unas altas tasas metabólicas. Respecto al ciclo del carbono, los humedales mediterráneos se ven activamente involucrados en la captación o en la emisión de gases de efecto invernadero carbonados (C-GEI) hacia la atmósfera, concretamente el dióxido de carbono y el metano. Esta relevancia de los humedales en el ciclo del carbono se debe, en parte, a la actividad de las comunidades de procariotas que habitan en el agua y en el sedimento de las zonas húmedas, puesto que la abundancia y versatilidad metabólica de los procariotas les …
Femtosecond‑LASIK outcomes using the VisuMax®‑MEL® 80 platform for hyperopia and hyperopic astigmatism refractive surgery
2021
The present study evaluated the efficacy, the safety and the predictability of the Femtosecond laser-assisted in situ keratomileusis (Femto-LASIK) procedure for hyperopia and hyperopic astigmatism. We retrospectively analyzed the postoperative 12-month evolution of 593 eyes with hyperopia and hyperopic astigmatism that underwent Femto-LASIK treatment. The procedure was predictable and effective. No eye lost 2 lines of corrected distance visual acuity (CDVA), demonstrating a safety profile of the procedure. Nine percent of the eyes gained at least one line of CDVA. The accuracy of the spherical equivalent after 12 months was 74% within ±1.0 diopter (D) of emmetropia. The refractive outcomes …
Microorganisms of food ice cubes and their transfer to drinks
2017
The present work was carried out to investigate the microbiological characteristics of the ice cubes produced at different levels: 1) home-made (HM) from domestic freezers; 2) produced by ice machines in bars and pubs (BP); 3) produced by ice industries (IN). BP samples were collected from the box stocks. HM and BP samples were transferred into sterile stomacher bags. IN samples were provided in the manufacturers’ plastic bags. Samples were transported into thermal insulated boxes. Five samples per each production level, forming a total of 15 samples (HM1-HM5, BP1-BP5, IN1-IN5), were collected in duplicate in two consecutive months. Each ice sample was thawed in 1 L sterile Dhuram’s bottle …
Gli impasti acidi impiegati nelle produzioni dei pani tipici siciliani
2018
L’utilizzo dei cereali per l’alimentazione umana risale all’era neolitica, come rivelato dalla scoperta di cariossidi fossili (Toderi 1989). Gli alimenti a base di cereali sono stati fondamentali per millenni e ancora costituiscono la principale fonte nutritiva per molte popolazioni (Blandino et alii 2003). I cereali contengono i macronutrienti necessari per la crescita e forniscono anche importanti minerali, vitamine e altri micronutrienti essenziali per il mantenimento di un buono stato di salute, sebbene siano carenti in alcuni componenti quali gli aminoacidi essenziali (ad es. lisina e triptofano). Il costante consumo di cereali riduce il rischio di malattie dovute a mala-alimentazione …
Parámetros clínicos y características microbiológicas en pacientes con tejidos periimplantarios sanos, mucositis y peri-implantitis
2014
La restauración de los dientes ausentes mediante implantes dentales constituye hoy en día un tratamiento rutinario y muy extendido. Varios estudios longitudinales han demostrado altas tasas de supervivencia de los implantes en función, que van desde el 90 % al 95 % en un periodo de hasta 20 años de seguimiento. Las complicaciones biológicas alrededor de los implantes dentales se clasifican en tempranas y tardías. Los fracasos tempranos son los que tienen lugar en el tiempo hasta la conexión del pilar al implante y son más fáciles de diagnosticar debido a la falta de osteointegración. Los fracasos tardíos son el resultado de la incapacidad de mantener la oseointegración, siendo la complicaci…
Nuclear entry and egress of parvoviruses.
2022
Parvoviruses are small non-enveloped single-stranded DNA viruses, which depend on host cell nuclear transcriptional and replication machinery. After endosomal exposure of nuclear localization sequence and a phospholipase A2 domain on the capsid surface, and escape into the cytosol, parvovirus capsids enter the nucleus. Due to the small capsid diameter of 18–26 nm, intact capsids can potentially pass into the nucleus through nuclear pore complexes (NPCs). This might be facilitated by active nuclear import, but capsids may also follow an alternative entry pathway that includes activation of mitotic factors and local transient disruption of the nuclear envelope. The nuclear entry is followed b…
Valutazione in vitro di bacteriocin-like inhibitory substances prodotte da batteri lattici isolati da formaggi tradizionali siciliani
2015
I batteri lattici (LAB) sono in grado di produrre differenti sostanze antimicrobiche tra cui le batteriocine, sostanze di natura proteica che stanno riscuotendo un crescente interesse per il loro possibile impiego come bio-conservanti per controllare e contenere i microrganismi indesiderati responsabili di contaminazioni e/o deterioramento delle matrici alimentari. Gli autori descrivono i risultati di uno screening volto all’identificazione di bacteriocin-like inhibitory substances (BLIS) prodotte da LAB isolati da processi produttivi di formaggi tradizionali siciliani utilizzando due metodi di screening e valutando la natura proteica delle sostanze antimicrobiche eventualmente prodotte, me…