Raoultella spp.—clinical significance, infections and susceptibility to antibiotics

Sękowska, Alicja

doi:10.1007/s12223-016-0490-7

Cited by 87 publications

(83 citation statements)

References 91 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…R. planticola (Drancourt et al 2001) is a bacterium that is found in soil and on plants, occasionally also on humans and animals. It can assimilate starch (Hii et al 2012), has been found in farms running dairy production and is an opportunistic pathogen (Sekowska 2017; Zadoks et al 2011). P. agglomerans lives in a variety of habitats, including plants, arthropods or vertebrates.…”

Section: Resultsmentioning

confidence: 99%

Yeasts and bacteria associated with kocho, an Ethiopian fermented food produced from enset (Ensete ventricosum)

Birmeta

Bakeeva

Passoth

2018

Antonie van Leeuwenhoek

View full text Add to dashboard Cite

Enset (Ensete ventricosum) is the basis of the staple food consumed by about 20% of the Ethiopian population. Kocho is one of the food products generated from enset by spontaneous fermentation of decorticated and pulverized pseudostem and corm sections. We isolated culturable microbes associated with kocho from different stages of fermentation. Twelve yeast species, six lactic acid bacteria (LABs) species and eleven species of aerobic bacteria were identified by sequencing ITS/D1D2 regions of 26S rDNA of yeasts and 16S rDNA of bacteria, respectively. More yeast species were identified in fresh (fermented for 2–5 days) kocho, compared to long-term (7–12 months) fermented kocho, while we observed an opposite trend for LABs. In fresh kocho, the most frequently isolated yeast species were Pichia exigua, Galactomyces geotrichum, and Pichia fermentans. From mid-term (3–4 months) kocho most frequently Candida cabralensis, G. geotrichum, and Candida ethanolica were isolated. In the long-term fermentations, the most frequently isolated yeast was Saturnispora silva. Lactobacillus plantarum was the most frequently isolated LAB in both fresh and mid-term kocho. In long-term fermented kocho, Acetobacter pasteurianus and L. plantarum were most frequently isolated. L. plantarum was consistently isolated from all the three stages of fermentation. Aerobic bacteria in fresh kocho were mostly gram-negative, with Raoultella planticola and Pantoea agglomerans being the most frequently isolated species. In long-term fermented kocho, mainly gram-positive, spore-forming bacteria of the genus Bacillus were found, among them also species of the Bacillus cereus group, Bacillus anthracis and Bacillus thurigiensis.

show abstract

Section: Resultsmentioning

confidence: 99%

Yeasts and bacteria associated with kocho, an Ethiopian fermented food produced from enset (Ensete ventricosum)

Birmeta

Bakeeva

Passoth

2018

Antonie van Leeuwenhoek

View full text Add to dashboard Cite

show abstract

“…are gram-negative aerobic rods belonging to the Enterobacteriaceae family. They typically inhabit natural environments but were also recognized as opportunistic human pathogens (Sękowska 2017). These bacteria are naturally resistant to aminopenicillins because of the possession of chromosomal, class A β-lactamase genes (Walckenaer et al 2004).…”

Section: Discussionmentioning

confidence: 99%

Diversity of β-lactam resistance genes in gram-negative rods isolated from a municipal wastewater treatment plant

2019

View full text Add to dashboard Cite

Urban wastewater treatment plants (UWTPs) are considered hot spots for the accumulation and transfer of antibiotic resistant bacteria and their genes. We investigated the prevalence, diversity, and genomic localization of β-lactamase resistance genes in wastewater from different parts of an UWTP, such as raw wastewater, wastewater from biological reactor, and treated wastewater, collected from the UWTP of Warsaw, Poland. In this study, we focused on gram-negative rods, mainly Enterobacteriaceae, and used Multiplex PCR to identify various β-lactamase resistance genes (bla). Susceptibility to a number of antibiotics and genomic localization of β-lactamase resistance genes were then determined using disc-diffusion and Southern hybridization methods, respectively. No differences in the frequency of different types of bla genes between the sampling points were discerned. Three new variants of β-lactamase genes (bla CMY-157 , bla MOX-13 , and bla FOX-15 ) were identified. Four bla genes (bla TEM-12 , bla TEM-30 , bla TEM-47/68 , bla ACT ) that had never been found in UWTPs were identified in this study. Nine of the identified bla genes had been found in the same environment previously. The bla FOX-15 variant on a Kluyvera sp. plasmid and bla GES type on Raoultella spp. plasmids were observed for the first time in these genera. There was a decrease in the number of multidrug resistant strains in the effluent compared to the influent. Finally, a significantly higher number of cefotaxime and carbapenem unsusceptible strains were detected in the influent than in the effluent. The results strongly support the hypothesis of UWTPs as a hot spot for antibiotic resistant genes (ARGs) and antibiotic resistant bacteria (ARB) accumulation and indicate that β-lactamase genes are widely disseminated among gram-negative rods isolated from this environment.

show abstract

“…33 Most species in the genus Raoultella are usually broadly sensitive to antibiotics based on the isolates from case series in the literature. 34 Similarly to some Klebsiella species, Raoultella spp. exhibit intrinsic resistance to ampicillin and ticarcillin which are the result of chromosomally encoded beta-lactamases.…”

Section: Virulence and Resistancementioning

confidence: 99%

“…exhibit intrinsic resistance to ampicillin and ticarcillin which are the result of chromosomally encoded beta-lactamases. [34][35][36][37] Chun et al (2015) reported a series of 16 patients with isolates showing antibiotic susceptibility to cephalosporins ranging from 69% to 100%, 93% susceptibility to amoxicillin/clavulanic acid, 88% to trimethoprim/sulfamethoxazole (TMP-SMX) and 100% to meropenem, imipenem and piperacillin/ tazobactam. 4 reported, in the largest series published, that resistance to amoxicillin/clavulanic acid, ceftriaxone, quinolones, TMP-SMX and aminoglycosides were 16%, 4%, 6%, 10 and 1% respectively.…”

Section: Virulence and Resistancementioning

confidence: 99%

“…Strains exhibiting beta-lactamases from Ambler class A, B and D have been reported. Several case reports have described isolates producing extended-spectrum beta-lactamases belonging to the SHV, TEM and CTX-M. 34,38,39 AmpC beta-lactamases producing strains were also isolated from clinical specimens in Iraq. 40 In the last decade, several emerging cases of carbapenem resistance were described.…”

Section: Virulence and Resistancementioning

confidence: 99%

See 1 more Smart Citation

<p><em>Raoultella ornithinolytica</em>: Emergence and Resistance</p>

Hajjar¹,

Ambaraghassi²,

Sebajang³

et al. 2020

IDR

View full text Add to dashboard Cite

Raoultella ornithinolytica is an encapsulated Gram-negative, oxidase-negative, catalase-positive, aerobic, non-motile rod that belongs to the Enterobacteriaceae family. This bacterium was initially classified in the genus Klebsiella as Klebsiella ornithinolytica, until the creation of the genus Raoultella in 2001. R. ornithinolytica is usually found in water environments and soil, and due to its ability to convert histidine to histamine, it has been associated with histamine poisoning in humans. R. ornithinolytica is an emerging entity in human infections, with several reports of virulent infections in comorbid at-risk patients. Increasing reports are potentially due to better and more precise identification tools. The objective of this article is to provide a comprehensive review of reported cases of R. ornithinolytica infections, the emergent virulence of described multiresistant strains, and an overview of currently used identification methods.

show abstract

Raoultella spp.—clinical significance, infections and susceptibility to antibiotics

Cited by 87 publications

References 91 publications

Yeasts and bacteria associated with kocho, an Ethiopian fermented food produced from enset (Ensete ventricosum)

Yeasts and bacteria associated with kocho, an Ethiopian fermented food produced from enset (Ensete ventricosum)

Diversity of β-lactam resistance genes in gram-negative rods isolated from a municipal wastewater treatment plant

<p><em>Raoultella ornithinolytica</em>: Emergence and Resistance</p>

Contact Info

Product

Resources

About