RESUMO
A total of 181 cultivable endophytic bacterial isolates were collected from stems of 13 species of herbs inhabiting Europe (Poland): Chelidonium majus L., Elymus repens L., Erigeron annuus L., Euphrasia rostkoviana Hayne, Foeniculum vulgare L., Geranium pratense L., Humulus lupulus L., Matricaria chamomilla L., Mentha arvensis L., Papaver rhoeas L., Rosmarinus officinalis L., Solidago gigantea L. and Vinca minor L. The isolates were screened for their antifungal activity and fifty three were found to inhibit fungal growth. Of these, five had strong antifungal properties. These selected isolates were identified as: Pseudomonas azotoformans, P. cedrina, Bacillus subtilis group and Erwinia persicina.
Assuntos
Bacillus subtilis/isolamento & purificação , Endófitos/isolamento & purificação , Erwinia/isolamento & purificação , Plantas Medicinais/microbiologia , Pseudomonas/isolamento & purificação , Antifúngicos/metabolismo , Bacillus subtilis/classificação , Bacillus subtilis/genética , Bacillus subtilis/metabolismo , Endófitos/classificação , Endófitos/genética , Erwinia/classificação , Erwinia/genética , Erwinia/metabolismo , Europa (Continente) , Fungos/efeitos dos fármacos , Fungos/crescimento & desenvolvimento , Pseudomonas/classificação , Pseudomonas/genética , Pseudomonas/metabolismoRESUMO
When antimicrobial resistant bacteria (ARB) and genes (ARGs) reach novel habitats, they can become part of the habitat's microbiome in the long term if they are able to overcome the habitat's biotic resilience towards immigration. This process should become more difficult with increasing biodiversity, as exploitable niches in a given habitat are reduced for immigrants when more diverse competitors are present. Consequently, microbial diversity could provide a natural barrier towards antimicrobial resistance by reducing the persistence time of immigrating ARB and ARG. To test this hypothesis, a pan-European sampling campaign was performed for structured forest soil and dynamic riverbed environments of low anthropogenic impact. In soils, higher diversity, evenness and richness were significantly negatively correlated with relative abundance of >85% of ARGs. Furthermore, the number of detected ARGs per sample were inversely correlated with diversity. However, no such effects were present in the more dynamic riverbeds. Hence, microbiome diversity can serve as a barrier towards antimicrobial resistance dissemination in stationary, structured environments, where long-term, diversity-based resilience against immigration can evolve.
Assuntos
Biodiversidade , Farmacorresistência Bacteriana , Microbiota , Microbiologia do Solo , Microbiota/genética , Farmacorresistência Bacteriana/genética , Bactérias/genética , Bactérias/classificação , Bactérias/efeitos dos fármacos , Genes Bacterianos , Rios/microbiologia , Antibacterianos/farmacologia , EcossistemaRESUMO
The dissemination of multidrug-resistant bacteria strains and genes carrying antibiotic resistance is currently considered to be one of the most important global problem. The WHO calls for the need to contain the spread of Antimicrobial Resistance (AMR) from all possible sources. There have been many international actions grouping scientists studying this phenomenon, and quite a lot of scientific projects devoted to this problem have already been carried out. As well, so far several strategies have been developed that can inhibit the AMR spread. In this mini-review, we highlight overlooked aspects that seem to be crucial for creating a comprehensive picture of AMR, especially in the context of One Health approach.