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Good bacteria

Beatriz Pérez Montoro, Nabil Benomar, Leyre Lavilla Lerma, Sonia Castillo Gutiérrez, Antonio Gálvez, Hikmate Abriouel
A collection of 31 Lactobacillus pentosus strains isolated from naturally fermented Aloreña green table olives were screened in depth in the present study for their probiotic potential. Several strains could be considered promising probiotic candidates since they showed good growth capacity and survival under simulated gastro-intestinal conditions (acidic pH of 1.5, up to 4% of bile salts and 5 mM of nitrate), good ability to auto-aggregate which may facilitate their adhesion to host cells as multiple aggregates and the subsequent displacement of pathogens...
2016: Frontiers in Microbiology
Gaoqiang Xu, Xinkun Shen, Liangliang Dai, Qichun Ran, Pingping Ma, Kaiyong Cai
Bacterial infection is one of the most severe postoperative complications leading to implantation failure. The early bacterial stage (4-6h) was proved to be the "decisive period" for long-term bacteria-related infection. Thus, to endow potential early antibacterial capacity for a titanium (Ti) based implant, an effective antiseptic agent of octenidine dihydrochloride (OCT) was effectively loaded on the mesoporous silica nanoparticles (MSNs)-incorporated titania coating which was fabricated by an electrophoretic-enhanced micro-arc oxidation technique...
January 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
Shunjie Yan, Lingjie Song, Shifang Luan, Zhirong Xin, Shanshan Du, Hengchong Shi, Shuaishuai Yuan, Yuming Yang, Jinghua Yin
Bacterial infections are problematic in many healthcare-associated devices. Antibacterial surfaces integrating the strength of bacteria repellent and bactericidal functions exhibit an encouraging efficacy in tackling this problem. Herein, a hierarchical dual-function antibacterial polymer brush coating that integrates an antifouling bottom layer with a bactericidal top layer is facilely constructed via living photograft polymerization. Excellent resistance to bacterial attachment is correlated with the antifouling components, and good bactericidal activity is afforded by the bactericidal components, and therefore the hierarchical coating shows an excellent long-term antibacterial capability...
August 12, 2016: Colloids and Surfaces. B, Biointerfaces
T Didbaridze, L Saginashvili, L Akhmeteli, B Iremashvili, N Gogokhia
This study provides a contemporary epidemiology of aspirates taken during surgery from the abdominal cavity among patients with bacterial peritonitis to identify the isolates and study their sensitivity to antibiotics. Our bacteriology investigations included isolation of poor cultures, and detection of microbes was conducted using a rapid identification system (API20E, API Staph, API Strep, API Ana, BioMerieux). Rapid tests for detection of oxidase and catalase activity were also used. Susceptibility of microorganisms to antibiotics was defined by the disc-diffusion method using standard discs (EUCAST guidelines 2015) according to Clinical Laboratory Standard Institute (CLSI) protocols (ATB strips: ATB G, ATB Staph, ATBANA, ATBPse, ATBStrep...
September 2016: Georgian Medical News
Xiaxia Meng, Dengwu Li, Dan Zhou, Dongmei Wang, Qiaoxiao Liu, Sufang Fan
ETHNOPHARMACOLOGICAL RELEVANCE: Juniperus rigida is used as Tibetan and Mongolian medicine in China for the treatment of rheumatoid arthritis, nephritis, brucellosis and other various inflammatory diseases. AIM OF THE STUDY: To evaluate antibacterial potential of essential oils from J. rigida leaves against Klebsiella pneumoniae and to examine its possible related mechanisms. The study was undertaken in order to scientifically validate the traditional use of J. rigida...
October 18, 2016: Journal of Ethnopharmacology
Nahid Alimoradi, Mohammad Reza Ashrafi-Kooshk, Mohsen Shahlaei, Shabnam Maghsoudi, Hadi Adibi, Ross P McGeary, Reza Khodarahmi
Purple acid phosphatases (PAPs) are binuclear metallo-hydrolases that have been isolated from various mammals, plants, fungi and bacteria. In mammals, PAP activity is associated with bone resorption and can lead to bone metabolic disorders such as osteoporosis; thus human PAP is an attractive target to develop anti-osteoporotic drugs. The aim of the present study was to investigate inhibitory effect of synthesized diethylalkylsulfonamido(4-methoxyphenyl)methyl)phosphonate/phosphonic acid derivatives as potential red kidney bean PAP (rkbPAP) inhibitors accompanied by experimental and molecular modeling assessments...
October 21, 2016: Journal of Enzyme Inhibition and Medicinal Chemistry
Magali Ranchou-Peyruse, Cyrielle Gasc, Marion Guignard, Thomas Aüllo, David Dequidt, Pierre Peyret, Anthony Ranchou-Peyruse
The formation water of a deep aquifer (853 m of depth) used for geological storage of natural gas was sampled to assess the mono-aromatic hydrocarbons attenuation potential of the indigenous microbiota. The study of bacterial diversity suggests that Firmicutes and, in particular, sulphate-reducing bacteria (Peptococcaceae) predominate in this microbial community. The capacity of the microbial community to biodegrade toluene and m- and p-xylenes was demonstrated using a culture-based approach after several hundred days of incubation...
October 21, 2016: Microbial Biotechnology
Nicolás M Vázquez, Graciela Fiorilli, Paulo A Cáceres Guido, Silvia Moreno
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) is resistant to different commonly used antibiotics, stressing the need for further strategies to treat this human pathogen with worldwide prevalence. The use of phytochemicals within the current pharmacology is a promising approach to enhance the antimicrobial activity of common antibiotics in the battle against these bacteria. PURPOSE: The purpose of this study was to determine the antimicrobial effectiveness of carnosic acid, the major constituent of Rosmarinus officinalis L...
November 15, 2016: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
Irfan A Butt, Bilal Aslam, Muhammad H Rasool, Humerah B Shafiq, Mohsin Khurshid, Muhammad A Aslam
To test various items in hospital environment as reservoirs of bacteria. Methods: This simple descriptive study was conducted between June and December 2014. Pediatric wards of 4 different hospitals of Faisalabad, Pakistan were selected and 8 different items per hospital were sampled (n=160). Poisson regression analysis was carried out with R software and using lme4 package. Results: There were no differences between the  hospitals regarding total number of bacterial isolates or bacterial isolates per sample source or prevalent bacterial species...
November 2016: Saudi Medical Journal
Taous Saraoui, Josiane Cornet, Emilie Guillouet, Marie France Pilet, Frédérique Chevalier, Jean-Jacques Joffraud, Françoise Leroi
Tropical shrimp is of considerable economic importance in the world but is highly perishable due to microbial and chemical degradation. Biopreservation is a food preservation technology based on the addition of "positive" bacteria able to kill or prevent the growth of undesirable microorganisms. Two strains of lactic acid bacteria (LAB) have previously been selected for a biopreservation strategy: Lactococcus piscium CNCM I-4031, for its ability to prevent the sensory deterioration of seafood and Carnobacterium divergens V41, which inhibits growth of Listeria monocytogenes...
October 3, 2016: International Journal of Food Microbiology
Seonghoon Kim, Dhilon S Patel, Soohyung Park, Joanna Slusky, Jeffery B Klauda, Göran Widmalm, Wonpil Im
Lipid A is the lipid anchor of a lipopolysaccharide in the outer leaflet of the outer membrane of Gram-negative bacteria. In general, lipid A consists of two phosphorylated N-acetyl glucosamine and several acyl chains that are directly linked to the two sugars. Depending on the bacterial species and environments, the acyl chain number and length vary, and lipid A can be chemically modified with phosphoethanolamine, aminoarabinose, or glycine residues, which are key to bacterial pathogenesis. In this work, homogeneous lipid bilayers of 21 distinct lipid A types from 12 bacterial species are modeled and simulated to investigate the differences and similarities of their membrane properties...
October 18, 2016: Biophysical Journal
Agnieszka Nowak, Izabela Greń, Agnieszka Mrozik
The changes in the cellular fatty acid composition of Stenotrophomonas maltophilia KB2 during co-metabolic degradation of monochlorophenols in the presence of phenol as well as its adaptive mechanisms to these compounds were studied. It was found that bacteria were capable of degrading 4-chlorophenol (4-CP) completely in the presence of phenol, while 2-chlorophenol (2-CP) and 3-chlorophenol (3-CP) they degraded partially. The analysis of the fatty acid profiles indicated that adaptive mechanisms of bacteria depended on earlier exposure to phenol, which isomer they degraded, and on incubation time...
December 2016: World Journal of Microbiology & Biotechnology
Tao Song, Hui Xu, Congchong Wei, Tengfei Jiang, Shishang Qin, Weijia Zhang, Yu Cao, Chao Hu, Fan Zhang, Dairong Qiao, Yi Cao
Seaweed is receiving an increasing amount of attention as a "sea vegetable". The microbiota of coastal populations may acquire seaweed associated enzymes through marine food. Several agarases have been found in non-marine environments; however, their origin is unknown. In this study, a hypothetical protein, Aga1, was identified as an agarase from an inland soil agar-degrading bacterium, Paenibacillus sp. SSG-1.Having low similarity to known glycoside hydrolases, Aga1 may be a distant member of the glycoside hydrolase family 86...
October 19, 2016: Scientific Reports
Petra Edlund, Heikki Takala, Elin Claesson, Léocadie Henry, Robert Dods, Heli Lehtivuori, Matthijs Panman, Kanupriya Pande, Thomas White, Takanori Nakane, Oskar Berntsson, Emil Gustavsson, Petra Båth, Vaibhav Modi, Shatabdi Roy-Chowdhury, James Zook, Peter Berntsen, Suraj Pandey, Ishwor Poudyal, Jason Tenboer, Christopher Kupitz, Anton Barty, Petra Fromme, Jake D Koralek, Tomoyuki Tanaka, John Spence, Mengning Liang, Mark S Hunter, Sebastien Boutet, Eriko Nango, Keith Moffat, Gerrit Groenhof, Janne Ihalainen, Emina A Stojković, Marius Schmidt, Sebastian Westenhoff
Phytochromes are a family of photoreceptors that control light responses of plants, fungi and bacteria. A sequence of structural changes, which is not yet fully understood, leads to activation of an output domain. Time-resolved serial femtosecond crystallography (SFX) can potentially shine light on these conformational changes. Here we report the room temperature crystal structure of the chromophore-binding domains of the Deinococcus radiodurans phytochrome at 2.1 Å resolution. The structure was obtained by serial femtosecond X-ray crystallography from microcrystals at an X-ray free electron laser...
October 19, 2016: Scientific Reports
Mahendra Kumar Prajapat, Isha Shroff, R G Brajesh, Supreet Saini
Cooperation benefits individual cells in a microbial population by helping accomplish tasks which are difficult or non-beneficial for individuals in the population to carry out by themselves. Hence, numerous examples exist of bacteria cooperating and working towards a common objective. The sharing of a common public good via quorum sensing is one of the ways of cooperation among individuals of many microbial populations. However, cheaters exploit cooperators in a population by not contributing to the production of the common goods but enjoy benefits from goods secreted by cooperating individuals...
October 18, 2016: Molecular BioSystems
John J B Anderson, David C Nieman
The Mediterranean diet is upheld in the 2015-2020 Dietary Guidelines as an example of an eating pattern that promotes good health, a healthy body weight, and disease prevention throughout the lifespan. The Mediterranean eating pattern is based on a variety of unprocessed plant foods including fruits, vegetables, whole grains, legumes, nuts, and seeds that are high in polyphenols. The majority of polyphenols arrive in the colon where bacteria degrade them into smaller phenolics that can be translocated via the portal vein to the liver...
October 14, 2016: Nutrients
Abdullah H A Dehwah, Samir Al-Mashharawi, Kim Choon Ng, Thomas M Missimer
An investigation of a sea water reverse osmosis desalination facility located in western Saudi Arabia has shown that aquifer treatment of the raw sea water provides a high degree of removal of natural organic matter (NOM) that causes membrane biofouling. The aquifer is a carbonate system that has a good hydraulic connection to the sea and 14 wells are used to induce sea water movement 400 to 450 m from the sea to the wells. During aquifer transport virtually all of the algae, over 90% of the bacteria, over 90% of the biopolymer fraction of NOM, and high percentages of the humic substance, building blocks, and some of the low molecular weight fractions of NOM are removed...
October 17, 2016: Ground Water
Rong-Wei Si, Yuan Yang, Yangyang Yu, Song Han, Chun-Lian Zhang, De-Zhen Sun, Dan-Dan Zhai, Xiang Liu, Yang-Chun Yong
A whole-cell bioelectrochemical biosensing system for amperometric detection of riboflavin was developed. A "bioelectrochemical wire" (BW) consists of riboflavin and cytochrome C between S. oneidensis MR-1 and electrode was characterized. Typically, strong electrochemical response was observed when riboflavin was added to reinforce this BW. Impressively, the electrochemical response of riboflavin with this BW was over 200 times higher than that without bacteria. Uniquely, this electron rewiring process enabled the development of a biosensing system for amperometric detection of riboflavin...
October 18, 2016: Analytical Chemistry
Andrew V Stachulski, Karl Swift, Mark Cooper, Stephen Reynolds, Daniel Norton, Steven D Slonecker, Jean-François Rossignol
Thiazolides are polypharmacology agents with at least three mechanisms of action against a broad spectrum of parasites, bacteria and viruses. In respiratory viruses they inhibit the replication of orthomyxoviridae and paramyxoviridae at a post-translational level. Nitazoxanide 1a, the prototype thiazolide, was originally developed as an antiparasitic agent and later repurposed for the treatment of viral respiratory infections. The second generation thiazolides following nitazoxanide, such as the 5-chloro analogue RM-5038 2a, are also broad-spectrum antiviral agents as we have reported...
September 26, 2016: European Journal of Medicinal Chemistry
Tania Fernández-Navarro, Nuria Salazar, Isabel Gutiérrez-Díaz, Borja Sánchez, Patricia Rúas-Madiedo, Clara G de Los Reyes-Gavilán, Abelardo Margolles, Miguel Gueimonde, Sonia González
PURPOSE: Short-chain fatty acids (SCFAs) formation by intestinal bacteria is regulated by many different factors, among which dietary fibre is currently receiving most attention. However, since fibre-rich foods are usually good dietary sources of phenolic compounds, which are also known to affect the microbiota, authors hypothesize that the regular intake of these bioactive compounds could be associated with a modulation of faecal SCFA production by the intestinal microbiota. METHODS: In this work, food intake was recorded by means of a validated Food Frequency Questionnaire...
October 15, 2016: European Journal of Nutrition
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