The genus Aeromonas: A general approach

Pessoa, Rafael Bastos Gonçalves; Oliveira, Weslley Felix de; Marques, Denílson Bezerra; Correia, Maria Tereza dos Santos; Carvalho, Elba Verônica Matoso Maciel de; Coelho, Luana Cassandra Breitenbach Barroso

doi:10.1016/j.micpath.2019.02.036

Cited by 123 publications

(41 citation statements)

References 158 publications

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“…The lack of cholerae toxin ( ctx A or ctx B) production, thermostable direct hemolysin ( tdh ), or zonula occludens toxin ( zot ) indicates a low level of virulence among the examined isolates. The most common virulence genes among the isolates included in this study were the Aeromonas ‐related hemolysin type III (Hemolysin III) (Goncalves Pessoa et al., 2019). The V. cholerae cytolysin A gene ( hlyA) was found among V. alginolyticus , V. metschnikovii, and V. anguillarum, whereas the thermolabile hemolysin gene ( tlh ) was present in all species except V. fujianensis .…”

Section: Discussionmentioning

confidence: 99%

Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes

et al. 2020

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A total of 116 Vibrio isolates comprising V. alginolyticus (n = 53), V. metschnikovii (n = 38), V. anguillarum (n = 21), V. antiquarius (n = 2), and V. fujianensis (n = 2) were obtained from seawater, fish, or bivalve molluscs from temperate Oceanic and Polar Oceanic area around Norway. Antibiotic sensitivity testing revealed resistance or reduced susceptibility to ampicillin (74%), oxolinic acid (33%), imipenem (21%), aztreonam (19%), and tobramycin (17%). Whole‐genome sequence analysis of eighteen drug‐resistant isolates revealed the presence of genes like β‐lactamases, chloramphenicol‐acetyltransferases, and genes conferring tetracycline and quinolone resistance. The strains also carried virulence genes like hlyA, tlh, rtxA to D and aceA, E and F. The genes for cholerae toxin (ctx), thermostable direct hemolysin (tdh), or zonula occludens toxin (zot) were not detected in any of the isolates. The present study shows low prevalence of multidrug resistance and absence of virulence genes of high global concern among environmental vibrios in Norway. However, in the light of climate change, and projected rising sea surface temperatures, even in the cold temperate areas, there is a need for frequent monitoring of resistance and virulence in vibrios to be prepared for future public health challenges.

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Section: Discussionmentioning

confidence: 99%

Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes

et al. 2020

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“…Here, the salivary cortisol level positively associated with the relative abundance of Bacteroidetes phylum, and Prevotellaceae-NK3B31 genus. Bacteroidales and Prevotellaceae are Gram-negative bacteria ( Goncalves Pessoa et al, 2019 ), which can produce lipopolysaccharide (LPS, bacterial endotoxin). LPS may cause an acute inflammatory response, stimulate the release of cortisol ( Wright et al, 2000 ; Singh et al, 2018 ), tumor necrosis factor-alpha (TNFα), interleukin-1β (IL-1β), gamma interferon (IFNγ) and other inflammatory cytokines and chemokines ( Everhardt Queen et al, 2016 ; Shin and Ajuwon, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

The Microbiome–Metabolome Response in the Colon of Piglets Under the Status of Weaning Stress

Jiang

Zhao

et al. 2020

Front. Microbiol.

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Weaning is stressful for piglets involving nutritional, physiological, and psychological challenges, leading to an increase in the secretion of cortisol, changes in gut microbiome and metabolites, whereas the underlying relationships remain unclear. To elucidate this, 14 Meishan female piglets were divided into the weaning group and the suckling group at the age of 21 days paired by litter and body weight. After 48 h of experiment, weaned piglets had lower body weight, but higher salivary cortisol level than that of their suckling litter mates ( P < 0.05). The composition of the colonic bacterial community and metabolites were different between the two groups, and the first predominant genus of the suckling and weaned piglets colonic microbiome were Bacteroides and Prevotellaceae-NK3B31 group respectively. The suckling piglets had higher proportions of phylum Bacteroidetes and Lentisphaerae , and genus Bacteroides and Lactobacillus in the colonic microbial community, but lower abundance of genus Prevotellaceae-NK3B31 group than that of the weaned piglets ( P < 0.05). Accordingly, there were 15 colonic metabolites differed between the two groups, in which 2 metabolites (phenylacetic acid and phenol) negatively related to the abundant of Lactobacillus genus ( P < 0.05), while 9 metabolites (acetic acid, arabitol, benzoic acid, caprylic acid, cholesterol, dihydrocholesterol, galactinol, glucose phenol, phenylacetic acid, and oxamic acid, glycerol, propionic acid) positively associated with the proportion of Prevotellaceae-NK3B31 group genus ( P < 0.05). Furthermore, the salivary cortisol level negatively associated with the abundance of phylum Lentisphaerae , but positively associated with the phylum Bacteroidetes and the genus Prevotellaceae-NK3B31 group ( P < 0.05) respectively. These results provide us with new insights into the cause of the gut microbiome and stress, and the contributions of gut microbiome in metabolic and physiological regulation in response to weaning stress.

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“…The genus Aeromonas is widely distributed across numerous ecosystems, although it is more commonly found in various aquatic environments [4,6,32]. These microorganisms have also been isolated from several environmental and clinical samples [4,97].…”

Section: Ecology and Epidemiologymentioning

confidence: 99%

An Update on the Genus Aeromonas: Taxonomy, Epidemiology, and Pathogenicity

2020

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The genus Aeromonas belongs to the Aeromonadaceae family and comprises a group of Gram-negative bacteria widely distributed in aquatic environments, with some species able to cause disease in humans, fish, and other aquatic animals. However, bacteria of this genus are isolated from many other habitats, environments, and food products. The taxonomy of this genus is complex when phenotypic identification methods are used because such methods might not correctly identify all the species. On the other hand, molecular methods have proven very reliable, such as using the sequences of concatenated housekeeping genes like gyrB and rpoD or comparing the genomes with the type strains using a genomic index, such as the average nucleotide identity (ANI) or in silico DNA–DNA hybridization (isDDH). So far, 36 species have been described in the genus Aeromonas of which at least 19 are considered emerging pathogens to humans, causing a broad spectrum of infections. Having said that, when classifying 1852 strains that have been reported in various recent clinical cases, 95.4% were identified as only four species: Aeromonas caviae (37.26%), Aeromonas dhakensis (23.49%), Aeromonas veronii (21.54%), and Aeromonas hydrophila (13.07%). Since aeromonads were first associated with human disease, gastroenteritis, bacteremia, and wound infections have dominated. The literature shows that the pathogenic potential of Aeromonas is considered multifactorial and the presence of several virulence factors allows these bacteria to adhere, invade, and destroy the host cells, overcoming the immune host response. Based on current information about the ecology, epidemiology, and pathogenicity of the genus Aeromonas, we should assume that the infections these bacteria produce will remain a great health problem in the future. The ubiquitous distribution of these bacteria and the increasing elderly population, to whom these bacteria are an opportunistic pathogen, will facilitate this problem. In addition, using data from outbreak studies, it has been recognized that in cases of diarrhea, the infective dose of Aeromonas is relatively low. These poorly known bacteria should therefore be considered similarly as enteropathogens like Salmonella and Campylobacter.

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The genus Aeromonas: A general approach

Cited by 123 publications

References 158 publications

Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes

Vibrios from the Norwegian marine environment: Characterization of associated antibiotic resistance and virulence genes

The Microbiome–Metabolome Response in the Colon of Piglets Under the Status of Weaning Stress

An Update on the Genus Aeromonas: Taxonomy, Epidemiology, and Pathogenicity

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