Outer membrane vesicles reflect environmental cues in Gallibacterium anatis

Bager, Ragnhild J.; Persson, Gry; Nesta, Barbara; Soriani, Marco; Serino, Laura; Jeppsson, Marina C.; Nielsen, T.K.; Bojesen, Anders Miki

doi:10.1016/j.vetmic.2013.09.005

Cited by 35 publications

(48 citation statements)

References 30 publications

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“…S1. As seen in other bacterial species (20,33), the composition of the culture medium clearly affects the production of OMVs by X. fastidiosa. Although the WT X. fastidiosa strain produced 51 ± 20 OMVs per cell in PD3 medium, only 7 ± 1 OMVs/cells were produced in PIM6 broth (Table 1).…”

Section: Fastidiosa Releases Large Numbers Of Omvs In Vitromentioning

confidence: 86%

Xylella fastidiosa outer membrane vesicles modulate plant colonization by blocking attachment to surfaces

Ionescu

Zaini

Baccari

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

138

140

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Significance Release of outer membrane vesicles (OMVs) is a general feature of Gram-negative bacteria. Most studies have addressed the mechanisms of their formation or the cargo they can carry, but other roles remain to be explored further. Here we provide evidence for a novel role for OMVs in Xylella fastidiosa , a bacterial pathogen that colonizes the xylem of important crop plants. OMVs, whose production is suppressed by a quorum-sensing system, serve as an autoinhibitor of cell adhesion to surfaces, thereby blocking attachment-driven biofilm formation that would restrict movement within the xylem and thus colonization of plants. The ubiquity of OMV formation in the bacterial world suggests that these extracellular products may have alternative roles that might modulate movement and biofilm formation.

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Section: Fastidiosa Releases Large Numbers Of Omvs In Vitromentioning

confidence: 86%

Xylella fastidiosa outer membrane vesicles modulate plant colonization by blocking attachment to surfaces

Ionescu

Zaini

Baccari

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

138

140

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“…The secretion of EMVs is regarded as a bacterial stress response and may be regulated by environmental cues (744,745). EMVs are beneficial for planktonic microbial cells in forming aggregates and contributing to adherence to surfaces and thus facilitate microbial surface colonization and early-stage biofilm development (744,746,747).…”

Section: Extracellular Membrane Vesicles As Mechanisms For Both Coopementioning

confidence: 99%

Microbial Surface Colonization and Biofilm Development in Marine Environments

Dang

Lovell

2016

Microbiol Mol Biol Rev

829

636

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SUMMARYBiotic and abiotic surfaces in marine waters are rapidly colonized by microorganisms. Surface colonization and subsequent biofilm formation and development provide numerous advantages to these organisms and support critical ecological and biogeochemical functions in the changing marine environment. Microbial surface association also contributes to deleterious effects such as biofouling, biocorrosion, and the persistence and transmission of harmful or pathogenic microorganisms and their genetic determinants. The processes and mechanisms of colonization as well as key players among the surface-associated microbiota have been studied for several decades. Accumulating evidence indicates that specific cell-surface, cell-cell, and interpopulation interactions shape the composition, structure, spatiotemporal dynamics, and functions of surface-associated microbial communities. Several key microbial processes and mechanisms, including (i) surface, population, and community sensing and signaling, (ii) intraspecies and interspecies communication and interaction, and (iii) the regulatory balance between cooperation and competition, have been identified as critical for the microbial surface association lifestyle. In this review, recent progress in the study of marine microbial surface colonization and biofilm development is synthesized and discussed. Major gaps in our knowledge remain. We pose questions for targeted investigation of surface-specific community-level microbial features, answers to which would advance our understanding of surface-associated microbial community ecology and the biogeochemical functions of these communities at levels from molecular mechanistic details through systems biological integration.

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“…La bacteria Gram negativa de Gallibacterium anatis causa salpingitis y peritonitis en gallinas ponedoras, lo cual disminuye la producción de huevo (2) , ocasionando problemas en la avicultura moderna por presentar lesiones como atrofia folicular, ooforitis, septicemia, folículos deformes, peritonitis, agrandamiento de los riñones, enteritis, congestión, así como edema del tracto respiratorio (3,4,5) . Mirle et al (1) establecieron que Gallibacterium también ocasiona alteración en el tamaño del huevo, variación en la formación del cascarón y bajas significativas en la producción del 2 al 4 %, ocasionando grandes pérdidas económicas y aumento en los costos de producción por tratamientos, por lo que representa un gran reto sanitario y económico para la industria avícola mexicana.…”

Section: Se Consiguieron Identificar 23 Aislamientos De Gallibacteriuunclassified

“…Anteriormente G. anatis era considerado un agente secundario (1) , debido a que este patógeno se encuentra en la flora normal de pollos sanos, por lo que causa intriga en cuanto a su patogenicidad primaria, que probablemente se encuentre influenciada por factores adicionales que causan la inmunosupresión de las aves, permitiendo que el agente oportunista de G. anatis actúe negativamente sobre el huésped (3,11,12) , sugiriendo que es una bacteria oportunista que puede convertirse en el agente primario para el desarrollo de la enfermedad (1,3,5) . Aunado a esto, es importante conocer los factores de patogenia y virulencia para mejorar, entender y prevenir los efectos negativos de G. anatis (2) ; como también, la aparición de nuevas enfermedades, la modificación de la virulencia y la medicación desmedida, las cuales han contribuido a la resistencia y susceptibilidad antimicrobiana a los antibióticos, complicando la enfermedad; observando aumento de resistencia antimicrobiana entre varios miembros de la familia Pasteurellaceaes (13,14) . El diagnóstico oportuno de esta enfermedad, podría prevenir algunos inconvenientes.…”

Section: Se Consiguieron Identificar 23 Aislamientos De Gallibacteriuunclassified

Antimicrobial resistance of Gallibacterium anatis isolates from breeding and laying commercial hens in Sonora, Mexico

Chávez

Barrios

Xóchihua

et al. 2017

Rev. Mex. Cienc. Pecu.

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RESUMENSe consiguieron identificar 23 aislamientos de Gallibacterium anatis, a través de pruebas convencionales de cultivo y bioquímicas, confirmándose su identificación a través del método de PCR. Se les efectuó la prueba de difusión en placa para determinar la resistencia antimicrobiana a los antibióticos más utilizados en el área avícola. Los aislamientos fueron más susceptibles a ceftiofur (73 %) y florfenicol (68 %); todos los aislamientos mostraron resistencia marcada a penicilina, tilosina, lincomicina, ampicilina, enrofloxacina, oxitetraciclina, norfloxacina y cefalexina. La presencia de Gallibacterium anatis se asocia a problemas respiratorios y reproductivos en las poblaciones de gallinas de postura comercial. Los aislamientos mostraron una resistencia marcada a distintos antibióticos, probablemente por la medicación desmedida ante la presencia de este microorganismo. PALABRAS CLAVE: Gallibacterium anatis, PCR, Resistencia, Susceptibilidad, Antimicrobianos. ABSTRACTIt was able to identify 23 isolates of Gallibacterium anatis through conventional culture and biochemical tests, and identification confirmed through PCR method. A disk diffusion test determined antimicrobial resistance to commonly used antibiotics in the poultry area. Isolates were more susceptible to ceftiofur (73 %) and florfenicol (68 %). All isolates showed marked resistance to penicillin, tylosin, lincomycin, ampicillin, enrofloxacin, oxytetracycline, norfloxacin and cephalexin. The presence of Gallibacterium anatis is associated with respiratory and reproductive problems in populations of commercial laying hens. Isolates showed marked resistance to different antibiotics, probably due to excessive medication in the presence of this organism.

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Outer membrane vesicles reflect environmental cues in Gallibacterium anatis

Cited by 35 publications

References 30 publications

Xylella fastidiosa outer membrane vesicles modulate plant colonization by blocking attachment to surfaces

Xylella fastidiosa outer membrane vesicles modulate plant colonization by blocking attachment to surfaces

Microbial Surface Colonization and Biofilm Development in Marine Environments

Antimicrobial resistance of Gallibacterium anatis isolates from breeding and laying commercial hens in Sonora, Mexico

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