Search results for "Bacteris"
showing 7 items of 37 documents
Exploiting the Redox Activity of MIL-100(Fe) Carrier Enables Prolonged Carvacrol Antimicrobial Activity
2022
The design of efficient food contact materials that maintain optimal levels of food safety is of paramount relevance to reduce the increasing number of foodborne illnesses. In this work, we develop a smart composite metal-organic framework (MOF)-based material that fosters a unique prolonged antibacterial activity. The composite is obtained by entrapping a natural food preserving molecule, carvacrol, into a mesoporous MIL-100(Fe) material following a direct and biocompatible impregnation method, and obtaining particularly high payloads. By exploiting the intrinsic redox nature of the MIL-100(Fe) material, it is possible to achieve a prolonged activity against Escherichia coli and Listeria i…
Gut microbiota changes in rainbow trout, Oncorhynchus mykiss (Walbaum), during organic acid feed supplementation and Yersinia ruckeri infection
2013
Gut microbiota (GM) composition of vertebrates are considered to influence health parameters including immunological parameters in the host but knowledge of these issues in fish are sparse. We have performed a 45 day experimental study elucidating effects of dietary supplementation of organic acids (Mera Cid) and immunostimulants on the GM composition of rainbow trout Oncorhynchus mykiss (Walbaum) and investigated its association with blood parameters and disease resistance (against enteric red mouth disease (ERM) caused the bacterium Yersinia ruckeri). A total of 640 fish received either 1) basic fish feed without organic acids or immunostimulants, 2) fish feed with immunostimulants (β6glu…
Eel immune response to Vibrio vulnificus infection. Host-pathogen relationship
2013
The European eel (Anguilla anguilla), has experienced a dangerous decline in recruitment, yield and stock over the last 30 years and this decline is likely to continue into the future. Several major threats are responsible for this situation, including overfishing of glass eels for consumption, new infections by introduced pathogens, dams and blocking of migration routes. The lack of knowledge concerning the biology of this species represents a handicap to the conservation and recovery of the population. Nevertheless,the eel farming industry is increasing, therefore it could be considered one of the major risks for wild eel stock perpetuation, which is threatened principally by the lack of …
Transgenic Killer Commensal Bacteria as Mucosal Protectants
2001
As first line of defense against the majority of infections and primary site for their transmission, mucosal surfaces of the oral cavity and genitourinary, gastrointestinal, and respiratory tracts represent the most suitable sites to deliver protective agents for the prevention of infectious diseases. Mucosal protection is important not only for life threatening diseases but also for opportunistic infections which currently represent a serious burden in terms of morbidity, mortality, and cost of cures. Candida albicans is among the most prevalent causes of mucosal infections not only in immuno- compromised patients, such as HIV-infected subjects who are frequently affected by oral and esoph…
Gut Microbiota Cannot Compensate the Impact of (quasi) Aposymbiosis in Blattella germanica
2021
Simple Summary The German cockroach Blattella germanica is a good model to study complex symbiotic relationships because the following two symbiotic systems coexist in a single individual: the endosymbiont Blattabacterium (living inside specialized cells called bacteriocytes) and the gut microbiota. Although the role of the endosymbiont has been fully elucidated, the function of the gut microbiota remains unclear. The study of the gut microbiota will benefit from the availability of insects deprived of Blattabacterium. Our goal is to determine the effect of the removal (or, at least, the reduction) of the endosymbiont population on the cockroach’s fitness, in a normal gut microbiota communi…
Manual Projecte Micromón 2021-22
2021
Aquest manual forma part dels materials oficials utilitzats en el marc de la Small World Initiative™ (SWI). SWI és un programa innovador concebut per Jo Handelsman (Universitat de Yale, EUA) el 2012 per motivar els estudiants cap a l’elecció d’un grau en ciències experimentals, al mateix temps que aborda una amenaça per a la salut a escala global: la disponibilitat reduïda d’antibiòtics eficaços. SWI se centra en la idea d’un curs de biologia bàsic basat en el descobriment, en què estudiants de tot el món porten a terme treball de camp i investigació en el laboratori sobre mostres de sòl a la recerca de nous antibiòtics. Dos terços dels antibiòtics disponibles procedeixen de bacteris o fong…
Enterobacteris en productes vegetals frescos: resistències als antibiòtics
2015
En aquest treball s’ha estudiat la presència d’enterobacteris en productes vegetals frescos que poden consumir-se directament, sense tractaments que poden afectar a la viabilitat dels microorganismes presents en aquests vegetals. Com material d’estudi s’han seleccionat una sèrie de verdures i hortalisses que habitualment poden consumir-se crues (tomates, enciams, rúcula, canonges, etc.), adquirides en distints establiments de la ciutat de València i els seus voltants, ja que la zona de l’horta de València es caracteritza, a més de per la qualitat i quantitat de la producció hortícola, per l’ús de pràctiques agrícoles (com l’ús de fem com adob) que afavoreixen la contaminació dels vegetals a…