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Phage Cocktail

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https://www.readbyqxmd.com/read/28405193/the-efficacy-of-isolated-bacteriophages-from-pig-farms-against-esbl-ampc-producing-escherichia-coli-from-pig-and-turkey-farms
#1
Aneta Skaradzińska, Paulina Śliwka, Marta Kuźmińska-Bajor, Grzegorz Skaradziński, Anna Rząsa, Anika Friese, Nicole Roschanski, Jayaseelan Murugaiyan, Uwe H Roesler
Extended-spectrum β-lactamases (ESBLs) and AmpC β-lactamases are plasmid (but also chromosomally) encoded enzymes found in Enterobacteriaceae, determining resistance to a variety of important antibiotics including penicillins, cephalosporins, and monobactams. In recent decades, the prevalence of ESBL/AmpC-producing bacteria has increased rapidly across the world. Here, we evaluate the potential use of bacteriophages in terms of a reduction of antibiotic-resistant bacteria in healthy animals. The aim of our studies was to isolate bacteriophages capable of destroying ESBL/AmpC-producing Escherichia coli isolated from livestock habitats...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28387353/characterization-and-genomic-analyses-of-two-newly-isolated-morganella-phages-define-distant-members-among-tevenvirinae-and-autographivirinae-subfamilies
#2
Hugo Oliveira, Graça Pinto, Ana Oliveira, Jean-Paul Noben, Hanne Hendrix, Rob Lavigne, Małgorzata Łobocka, Andrew M Kropinski, Joana Azeredo
Morganella morganii is a common but frequent neglected environmental opportunistic pathogen which can cause deadly nosocomial infections. The increased number of multidrug-resistant M. morganii isolates motivates the search for alternative and effective antibacterials. We have isolated two novel obligatorily lytic M. morganii bacteriophages (vB_MmoM_MP1, vB_MmoP_MP2) and characterized them with respect to specificity, morphology, genome organization and phylogenetic relationships. MP1's dsDNA genome consists of 163,095 bp and encodes 271 proteins, exhibiting low DNA (<40%) and protein (<70%) homology to other members of the Tevenvirinae...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28362863/bacteriophage-preparation-lytic-for-shigella-significantly-reduces-shigella-sonnei-contamination-in-various-foods
#3
Nitzan Soffer, Joelle Woolston, Manrong Li, Chythanya Das, Alexander Sulakvelidze
ShigaShield™ is a phage preparation composed of five lytic bacteriophages that specifically target pathogenic Shigella species found in contaminated waters and foods. In this study, we examined the efficacy of various doses (9x105-9x107 PFU/g) of ShigaShield™ in removing experimentally added Shigella on deli meat, smoked salmon, pre-cooked chicken, lettuce, melon and yogurt. The highest dose (2x107 or 9x107 PFU/g) of ShigaShield™ applied to each food type resulted in at least 1 log (90%) reduction of Shigella in all the food types...
2017: PloS One
https://www.readbyqxmd.com/read/28286740/long-term-safety-of-topical-bacteriophage-application-to-the-frontal-sinus-region
#4
Amanda J Drilling, Mian L Ooi, Dijana Miljkovic, Craig James, Peter Speck, Sarah Vreugde, Jason Clark, Peter-John Wormald
Background:Staphylococcus aureus biofilms contribute negatively to a number of chronic conditions, including chronic rhinosinusitis (CRS). With the inherent tolerance of biofilm-bound bacteria to antibiotics and the global problem of bacterial antibiotic resistance, the need to develop novel therapeutics is paramount. Phage therapy has previously shown promise in treating sinonasal S. aureus biofilms. Methods: This study investigates the long term (20 days) safety of topical sinonasal flushes with bacteriophage suspensions...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28163700/bacteriophages-and-bacterial-plant-diseases
#5
REVIEW
Colin Buttimer, Olivia McAuliffe, R P Ross, Colin Hill, Jim O'Mahony, Aidan Coffey
Losses in crop yields due to disease need to be reduced in order to meet increasing global food demands associated with growth in the human population. There is a well-recognized need to develop new environmentally friendly control strategies to combat bacterial crop disease. Current control measures involving the use of traditional chemicals or antibiotics are losing their efficacy due to the natural development of bacterial resistance to these agents. In addition, there is an increasing awareness that their use is environmentally unfriendly...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28146150/a-cocktail-of-three-virulent-bacteriophages-prevents-vibrio-cholerae-infection-in-animal-models
#6
Minmin Yen, Lynne S Cairns, Andrew Camilli
Effective prevention strategies will be essential in reducing disease burden due to bacterial infections. Here we harness the specificity and rapid-acting properties of bacteriophages as a potential prophylaxis therapy for cholera, a severely dehydrating disease caused by Vibrio cholerae. To this end, we test a cocktail of three virulent phages in two animal models of cholera pathogenesis (infant mouse and rabbit models). Oral administration of the phages up to 24 h before V. cholerae challenge reduces colonization of the intestinal tract and prevents cholera-like diarrhea...
February 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/28120922/microencapsulation-with-alginate-caco3-a-strategy-for-improved-phage-therapy
#7
Joan Colom, Mary Cano-Sarabia, Jennifer Otero, Javier Aríñez-Soriano, Pilar Cortés, Daniel Maspoch, Montserrat Llagostera
Bacteriophages are promising therapeutic agents that can be applied to different stages of the commercial food chain. In this sense, bacteriophages can be orally administered to farm animals to protect them against intestinal pathogens. However, the low pH of the stomach, the activities of bile and intestinal tract enzymes limit the efficacy of the phages. This study demonstrates the utility of an alginate/CaCO3 encapsulation method suitable for bacteriophages with different morphologies and to yield encapsulation efficacies of ~100%...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28007922/synergistic-interaction-between-phage-therapy-and-antibiotics-clears-pseudomonas-aeruginosa-infection-in-endocarditis-and-reduces-virulence
#8
Frank Oechslin, Philippe Piccardi, Stefano Mancini, Jérôme Gabard, Philippe Moreillon, José M Entenza, Gregory Resch, Yok-Ai Que
Background.: Increasing antibiotic resistance warrants therapeutic alternatives. Here we investigated the efficacy of bacteriophage-therapy (phage) alone or combined with antibiotics against experimental endocarditis (EE) due to Pseudomonas aeruginosa, an archetype of difficult-to-treat infection. Methods.: In vitro fibrin clots and rats with aortic EE were treated with an antipseudomonas phage cocktail alone or combined with ciprofloxacin. Phage pharmacology, therapeutic efficacy, and resistance were determined...
March 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27932642/complete-genome-sequence-of-vb_ecom-ufv13-a-new-bacteriophage-able-to-disrupt-trueperella-pyogenes-biofilm
#9
Vinícius S Duarte, Roberto S Dias, Andrew M Kropinski, Pedro M P Vidigal, Flávia O Sousa, André S Xavier, Cynthia C Silva, Sergio O de Paula
vB_EcoM-UFV13, a member of the T4virus genus, shows lytic activity against Escherichia coli and effectiveness in controlling the biofilm formed by Trueperella pyogenes, which qualifies it as a promising component of phage cocktails for mastitis and metritis control.
December 8, 2016: Genome Announcements
https://www.readbyqxmd.com/read/27917795/lytic-activity-of-various-phage-cocktails-on-multidrug-resistant-bacteria
#10
I Ozkan, E Akturk, N Yeshenkulov, S Atmaca, N Rahmanov, H I Atabay
PURPOSE: A bacteriophage is a virus that infects and replicates within a bacterium following the injection of phage genome into the bacterial cytoplasm. They are seen as a possible therapy for multi-drug-resistant strains of many bacteria. The aim of this study is to evaluate the lytic activity of the Pyo, Intesti and Fersisi bacteriophage cocktails on P. aeruginosa and S. aureus. METHODS: Ten different S. aureus and P. aeruginosa strains, which were isolated from hospitalized patients in Turkey, were used in the study...
December 1, 2016: Clinical and Investigative Medicine. Médecine Clinique et Experimentale
https://www.readbyqxmd.com/read/27869203/no-effect-of-natural-transformation-on-the-evolution-of-resistance-to-bacteriophages-in-the-acinetobacter-baylyi-model-system
#11
Amy McLeman, Pawel Sierocinski, Elze Hesse, Angus Buckling, Gabriel Perron, Nils Hülter, Pål Jarle Johnsen, Michiel Vos
The adaptive benefits of natural transformation, the active uptake of free DNA molecules from the environment followed by incorporation of this DNA into the genome, may be the improved response to selection resulting from increased genetic variation. Drawing analogies with sexual reproduction, transformation may be particularly beneficial when selection rapidly fluctuates during coevolution with virulent parasites ('the Red Queen Hypothesis'). Here we test this hypothesis by experimentally evolving the naturally transformable and recombinogenic species Acinetobacter baylyi with a cocktail of lytic phages...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27857711/in-vitro-effectiveness-of-commercial-bacteriophage-cocktails-on-diverse-extended-spectrum-beta-lactamase-producing-escherichia-coli-strains
#12
Aycan Gundogdu, Darajen Bolkvadze, Huseyin Kilic
The objective of this study is to determine the in vitro susceptibility of Georgian bacteriophage cocktails on multidrug resistant (MDR) extended-spectrum beta-lactamase producing Escherichia coli (ESBL-EC) isolated from patients' blood and urine cultures. A total of 615 E. coli isolates were included in this study. Phene Plate (PhP)-typing and phylogenetic grouping were used for the typing. Antimicrobial resistance profiles and ESBL production of all isolates were confirmed according to Clinical and Laboratory Standards Institute (CLSI) criteria...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27822205/antibody-production-in-response-to-staphylococcal-ms-1-phage-cocktail-in-patients-undergoing-phage-therapy
#13
Maciej Żaczek, Marzanna Łusiak-Szelachowska, Ewa Jończyk-Matysiak, Beata Weber-Dąbrowska, Ryszard Międzybrodzki, Barbara Owczarek, Agnieszka Kopciuch, Wojciech Fortuna, Paweł Rogóż, Andrzej Górski
In this study, we investigated the humoral immune response (through the release of IgG, IgA, and IgM antiphage antibodies) to a staphylococcal phage cocktail in patients undergoing experimental phage therapy at the Phage Therapy Unit, Medical Center of the Ludwik Hirszfeld Institute of Immunology and Experimental Therapy in Wrocław, Poland. We also evaluated whether occurring antiphage antibodies had neutralizing properties toward applied phages (K rate). Among 20 examined patients receiving the MS-1 phage cocktail orally and/or locally, the majority did not show a noticeably higher level of antiphage antibodies in their sera during phage administration...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27818282/isolation-of-bacteriophages-and-their-application-to-control-pseudomonas-aeruginosa-in-planktonic-and-biofilm-models
#14
Magdalena Kwiatek, Sylwia Parasion, Paweł Rutyna, Lidia Mizak, Romuald Gryko, Marcin Niemcewicz, Alina Olender, Małgorzata Łobocka
Pseudomonas aeruginosa is frequently identified as a cause of diverse infections and chronic diseases. It forms biofilms and has natural resistance to several antibiotics. Strains of this pathogen resistant to new-generation beta-lactams have emerged. Due to the difficulties associated with treating chronic P. aeruginosa infections, bacteriophages are amongst the alternative therapeutic options being actively researched. Two obligatorily lytic P. aeruginosa phages, vB_PaeM_MAG1 (MAG1) and vB_PaeP_MAG4 (MAG4), have been isolated and characterized...
April 2017: Research in Microbiology
https://www.readbyqxmd.com/read/27790211/modular-approach-to-select-bacteriophages-targeting-pseudomonas-aeruginosa-for-their-application-to-children-suffering-with-cystic-fibrosis
#15
REVIEW
Victor Krylov, Olga Shaburova, Elena Pleteneva, Maria Bourkaltseva, Sergey Krylov, Alla Kaplan, Elena Chesnokova, Leonid Kulakov, Damian Magill, Olga Polygach
This review discusses the potential application of bacterial viruses (phage therapy) toward the eradication of antibiotic resistant Pseudomonas aeruginosa in children with cystic fibrosis (CF). In this regard, several potential relationships between bacteria and their bacteriophages are considered. The most important aspect that must be addressed with respect to phage therapy of bacterial infections in the lungs of CF patients is in ensuring the continuity of treatment in light of the continual occurrence of resistant bacteria...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27756632/characterization-and-in-vitro-evaluation-of-new-bacteriophages-for-the-biocontrol-of-escherichia-coli
#16
Carla Pereira, Catarina Moreirinha, Magdalena Lewicka, Paulo Almeida, Carla Clemente, Jesús L Romalde, Maria L Nunes, Adelaide Almeida
In the present study two new phages (phT4A and ECA2) were characterized and their efficacy was evaluated separately and in cocktail (phT4A/ECA2) to control Escherichia coli. The isolated phages, phT4A and ECA2, belonged to the Myoviridae and Podoviridae family, respectively and both are safe (no integrase and toxin codifying genes) to be used in bacterial control. In general, the increase of multiplicity of infection (MOI) from 1 to 100 promoted a significant increase in the efficiency of phage phT4A and phage cocktail phT4A/ECA2...
January 2, 2017: Virus Research
https://www.readbyqxmd.com/read/27750388/oral-application-of-escherichia-coli-bacteriophage-safety-tests-in-healthy-and-diarrheal-children-from-bangladesh
#17
Shafiqul Alam Sarker, Bernard Berger, Ying Deng, Silas Kieser, Francis Foata, Deborah Moine, Patrick Descombes, Shamima Sultana, Sayeeda Huq, Pradip Kumar Bardhan, Valérie Vuillet, Fabienne Praplan, Harald Brüssow
A T4-like coliphage cocktail was given with different oral doses to healthy Bangladeshi children in a placebo-controlled randomized phase I safety trial. Fecal phage detection was oral dose dependent suggesting passive gut transit of coliphages through the gut. No adverse effects of phage application were seen clinically and by clinical chemistry. Similar results were obtained for a commercial phage preparation (Coliproteus from Microgen/Russia). By 16S rRNA gene sequencing, only a low degree of fecal microbiota conservation was seen in healthy children from Bangladesh who were sampled over a time interval of 7 days suggesting a substantial temporal fluctuation of the fecal microbiota composition...
October 17, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27738557/bacteriophages-safely-reduce-salmonella-contamination-in-pet-food-and-raw-pet-food-ingredients
#18
Nitzan Soffer, Tamar Abuladze, Joelle Woolston, Manrong Li, Leigh Farris Hanna, Serena Heyse, Duane Charbonneau, Alexander Sulakvelidze
Contamination of pet food with Salmonella is a serious public health concern, and several disease outbreaks have recently occurred due to human exposure to Salmonella tainted pet food. The problem is especially challenging for raw pet foods (which include raw meats, seafood, fruits, and vegetables). These foods are becoming increasingly popular because of their nutritional qualities, but they are also more difficult to maintain Salmonella-free because they lack heat-treatment. Among various methods examined to improve the safety of pet foods (including raw pet food), one intriguing approach is to use bacteriophages to specifically kill Salmonella serotypes...
July 2016: Bacteriophage
https://www.readbyqxmd.com/read/27723009/control-of-multidrug-resistant-gene-flow-in-the-environment-through-bacteriophage-intervention
#19
REVIEW
Krupa M Parmar, Zubeen J Hathi, Nishant A Dafale
The spread of multidrug-resistant (MDR) bacteria is an emerging threat to the environment and public wellness. Inappropriate use and indiscriminate release of antibiotics in the environment through un-metabolized form create a scenario for the emergence of virulent pathogens and MDR bugs in the surroundings. Mechanisms underlying the spread of resistance include horizontal and vertical gene transfers causing the transmittance of MDR genes packed in different host, which pass across different food webs. Several controlling agents have been used for combating pathogens; however, the use of lytic bacteriophages proves to be one of the most eco-friendly due to their specificity, killing only target bacteria without damaging the indigenous beneficial flora of the habitat...
March 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27697159/application-of-phage-therapy-during-bivalve-depuration-improves-escherichia-coli-decontamination
#20
Carla Pereira, Catarina Moreirinha, Luís Teles, Rui J M Rocha, Ricardo Calado, Jesús L Romalde, Maria L Nunes, Adelaide Almeida
The present study investigated the potential application of the bacteriophage (or phage) phT4A, ECA2 and the phage cocktail phT4A/ECA2 to decrease the concentration of Escherichia coli during the depuration of natural and artificially contaminated cockles. Depuration in static seawater at multiplicity of infection (MOI) of 1 with single phage suspensions of phT4A and ECA2 was the best condition, as it decreased by ∼2.0 log CFU/g the concentration of E. coli in artificially contaminated cockles after a 4 h of treatment...
February 2017: Food Microbiology
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