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https://www.readbyqxmd.com/read/29141129/recent-trends-in-salmonella-outbreaks-and-emerging-technology-for-biocontrol-of-salmonella-using-phages-in-foods-a-review
#1
REVIEW
Jun-Hyun Oh, Mi-Kyung Park
Salmonella is one of the principal causes of foodborne outbreaks. As traditional control methods have shown efficacy against emerging Salmonella serotypes or antimicrobial-resistant Salmonella, new approaches have been attempted. The use of lytic phages for the biocontrol of Salmonella in food industry has become an attractive method owing to the many advantages offered by the use of phages as biocontrol agents. Phages are natural alternatives to traditional antimicrobial agents; they have proven effective in the control of bacterial pathogens in food industry, which has led to the development of different phage products...
November 15, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29141037/edna-for-detection-of-five-highly-invasive-molluscs-a-case-study-in-urban-rivers-from-the-iberian-peninsula
#2
Laura Clusa, Laura Miralles, Ana Basanta, Carmelo Escot, Eva García-Vázquez
Biological invasions are an important threat to biodiversity especially in aquatic ecosystems, and their frequency is generally higher near urban areas. Potentially invasive non-indigenous molluscs were deliberately introduced into European waters for food (Corbicula fluminea) and biocontrol (Melanoides tuberculata), and unintentionally introduced by ballast water (Mytilopsis leucophaeata, Corbicula fluminea), stock contamination (Sinanodonta woodiana), accidental escapes from aquaculture (Sinanodonta woodiana), aquarium trade releases (Melanoides tuberculata) and even attached to aquatic birds (Corbicula fluminea)...
2017: PloS One
https://www.readbyqxmd.com/read/29138628/biocontrol-activity-of-volatile-producing-bacillus-megaterium-and-pseudomonas-protegens-against-aspergillus-flavus-and-aflatoxin-production-on-stored-rice-grains
#3
Mohamed Mannaa, Ji Yeon Oh, Ki Deok Kim
In our previous study, three bacterial strains, Bacillus megaterium KU143, Microbacterium testaceum KU313, and Pseudomonas protegens AS15, were selected as effective biocontrol agents against Aspergillus flavus on stored rice grains. In this study, we evaluated the inhibitory effects of the volatiles produced by the strains on A. flavus growth and aflatoxin production on stored rice grains. The three strains significantly reduced mycelial growth of A. flavus in dual-culture assays compared with the negative control strain, Sphingomonas aquatilis KU408, and an untreated control...
September 2017: Mycobiology
https://www.readbyqxmd.com/read/29134588/encapsulation-strategies-of-bacteriophage-felix-o1-for-oral-therapeutic-application
#4
Golam S Islam, Qi Wang, Parviz M Sabour
Due to emerging antibiotic-resistant strains among the pathogens, a variety of strategies, including therapeutic application of bacteriophages, have been suggested as a possible alternative to antibiotics in food animal production. As pathogen-specific biocontrol agents, bacteriophages are being studied intensively. Primarily their applications in the food industry and animal production have been recognized in the USA and Europe, for pathogens including Salmonella, Campylobacter, Escherichia coli, and Listeria...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29134389/exploration-antifungal-and-antiaflatoxigenic-activity-of-halophilic-bacteria-communities-from-saline-soils-of-howze-soltan-playa-in-iran
#5
Samaneh Jafari, Seyed-Soheil Aghaei, Hossein Afifi-Sabet, Masoomeh Shams-Ghahfarokhi, Zahra Jahanshiri, Mohammadhassan Gholami-Shabani, Seyedahmad Shafiei-Darabi, Mehdi Razzaghi-Abyaneh
In the present study, halophilic bacteria communities were explored in saline soils of Howze-Soltan playa in Iran with special attention to their biological activity against an aflatoxigenic Aspergillus parasiticus NRRL 2999. Halophilic bacteria were isolated from a total of 20 saline soils using specific culture media and identified by 16S rRNA sequencing in neighbor-joining tree analysis. Antifungal and antiaflatoxigenic activities of the bacteria were screened by a nor-mutant A. parasiticus NRRL 2999 using visual agar plate assay and confirmed by high-performance liquid chromatography...
November 13, 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/29134332/type-iv-pilus-biogenesis-genes-and-their-roles-in-biofilm-formation-in-the-biological-control-agent-lysobacter-enzymogenes-oh11
#6
Jing Xia, Jiaojiao Chen, Yuan Chen, Guoliang Qian, Fengquan Liu
Type IV pilus (T4P) is widespread in bacteria, yet its biogenesis mechanism and functionality is only partially elucidated in a limited number of bacterial species. Here, by using strain OH11 as the model organism, we reported the identification of 26 T4P structural or functional component (SFC) proteins in the Gram-negative Lysobacter enzymogenes, which is a biocontrol agent potentially exploiting T4P-mediated twitching motility for antifungal activity. Twenty such SFC coding genes were individually knocked-out in-frame to create a T4P SFC deletion library...
November 13, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29127811/distribution-and-incidence-of-atoxigenic-aspergillus-flavus-vcg-in-tree-crop-orchards-in-california-a-strategy-for-identifying-potential-antagonists-the-example-of-almonds
#7
Adeline Picot, Mark Doster, Md-Sajedul Islam, Kenneth Callicott, Alejandro Ortega-Beltran, Peter Cotty, Themis Michailides
To identify predominant isolates for potential use as biocontrol agents, Aspergillus flavus isolates collected from soils of almond, pistachio and fig orchard in the Central Valley of California were tested for their membership to 16 atoxigenic vegetative compatibility groups (VCGs), including YV36, the VCG to which AF36, an atoxigenic isolate commercialized in the United States as biopesticide, belongs. A surprisingly large proportion of isolates belonged to YV36 (13.3%, 7.2% and 6.6% of the total almond, pistachio and fig populations, respectively), while the percentage of isolates belonging to the other 15 VCGs ranged from 0% to 2...
October 21, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29124466/antifungal-activity-of-avocado-rhizobacteria-against-fusarium-euwallaceae-and-graphium-spp-associated-with-euwallacea-spp-nr-fornicatus-and-phytophthora-cinnamomi
#8
Edgar Guevara-Avendaño, Joseph D Carrillo, Cedric Ndinga-Muniania, Kevin Moreno, Alfonso Méndez-Bravo, José A Guerrero-Analco, Akif Eskalen, Frédérique Reverchon
Plant rhizobacteria have been successfully used as biocontrol agents against fungal phytopathogens. However, their potential to control two important avocado diseases, namely Fusarium dieback (FD) and Phytophthora root rot (PRR), has been poorly studied. FD is an emerging disease triggered by fungi associated with two ambrosia beetle species (Euwallacea fornicatus species complex), while PRR is caused by Phytophthora cinnamomi, a soil-borne oomycete. In the present work, the antifungal activity of bacteria isolated from avocado rhizosphere was tested in dual culture assays against Fusarium euwallaceae, Graphium euwallaceae and Graphium sp...
November 9, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/29123549/isolation-and-physiomorphological-characterization-of-escherichia-coli-o157-h7-infecting-bacteriophages-recovered-from-beef-cattle-operations
#9
Pushpinder Kaur Litt, Divya Jaroni
Bacteriophages, recovered from beef cattle environment and specifically targeting Escherichia coli O157:H7, were examined for their physiological and morphological characteristics. Degree of bacterial lysis and host range of isolated bacteriophages was determined against 55 isolates of E. coli O157:H7. Morphology of phages was examined under transmission electron microscope. Phage growth parameters, particularly rate of adsorption, rise period, latent period, and burst size were also determined. The stability of isolated phages was tested at acidic and alkaline pH, at high temperatures, and in cold storage...
2017: International Journal of Microbiology
https://www.readbyqxmd.com/read/29123509/isolation-of-antagonistic-endophytes-from-banana-roots-against-meloidogyne-javanica-and-their-effects-on-soil-nematode-community
#10
Lanxi Su, Zongzhuan Shen, Yunze Ruan, Chengyuan Tao, Yifan Chao, Rong Li, Qirong Shen
Banana production is seriously hindered by Meloidogyne spp. all over the world. Endophytes are ideal candidates compared to pesticides as an environmentally benign agent. In the present study, endophytes isolated from banana roots infected by Meloidogyne spp. with different disease levels were tested in vitro, and in sterile and nature banana monoculture soils against Meloidogyne javanica. The proportion of antagonistic endophytes were higher in the roots of middle and high disease levels. Among those, bacteria were dominant, and Pseudomonas spp...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29121244/host-plant-herbivore-predator-interactions-in-chrysoperla-carnea-neuroptera-chrysopidae-and-myzus-persicae-homoptera-aphididae-on-four-plant-species-under-laboratory-conditions
#11
Milad Farrokhi, Gholamhossein Gharekhani, Shahzad Iranipour, Mahdi Hassanpour
The common green lacewing, Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae), is a well-known biocontrol agent. The current study examined host plant-herbivore-predator interactions with C. carnea and Myzus persicae on four host plants (peach, almond, pepper, and potato). The experiments were carried out at 25 ± 1°C and 65 ± 5% RH at a photoperiod of 16:8 (L:D) h). Duration of the preadult growth period, adult longevity, fecundity, and population growth parameters were analyzed based on the age-stage, two-sex life table theory...
November 6, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29116575/isolation-and-characterization-of-a-novel-t7-like-phage-against-aeromonas-veronii
#12
Taruna Anand, Bidhan Ch Bera, Nitin Virmani, Rajesh Kumar Vaid, Medhavi Vashisth, Bhupendra Nath Tripathi
A virulent Aeromonas veronii biovar sobria and the corresponding novel, lytic bacteriophage (VTCCBPA5) were isolated from village pond water. The phage was found to belong to family Podoviridae. PCR analysis of major capsid protein gene confirmed its classification to T7-like genus. The protein profiling by SDS-PAGE indicated the major structural protein to be ~ 45 kDa. The phage (VTCCBPA5) is host specific and is stable over a range of pH (6-10) and temperatures (4-45 °C). On the basis of restriction endonuclease analysis combined with prediction mapping, it was observed to vary significantly from previously reported podophages of Aeromonas sp...
November 7, 2017: Virus Genes
https://www.readbyqxmd.com/read/29107842/volatile-organic-compounds-from-wickerhamomyces-anomalus-metschnikowia-pulcherrima-and-saccharomyces-cerevisiae-inhibit-growth-of-decay-causing-fungi-and-control-postharvest-diseases-of-strawberries
#13
Lucia Oro, Erica Feliziani, Maurizio Ciani, Gianfranco Romanazzi, Francesca Comitini
The effectiveness of Wickerhamomyces anomalus, Metschnikowia pulcherrima and Saccharomyces cerevisiae as biocontrol agents on postharvest decay of strawberry (Fragaria x ananassa, cv. 'Alba') fruit, and their inhibitory activities on some decay-causing fungi were evaluated. Volatile organic compounds from these yeasts decreased mycelial growth of Botrytis cinerea by 69%, and by less for Monilinia fructicola, Alternaria alternata, Aspergillus carbonarius, Penicillium digitatum, Cladosporium spp., and Colletotrichum spp...
October 24, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/29107238/in-vitro-and-in-vivo-activities-of-eugenol-against-tobacco-black-shank-caused-by-phytophthora-nicotianae
#14
Changliang Jing, Jianyu Gou, Xiaobin Han, Qian Wu, Chengsheng Zhang
Phytophthora nicotianae causes serious black shank disease in tobacco. Syringa oblata essential oil and its main components were evaluated to develop an effective and environmentally friendly biocontrol agent. Eugenol, which exhibited the strongest activity, was intensively investigated in vitro and in vivo. The mycelial growth of P. nicotianae was inhibited by eugenol at a minimum inhibitory concentration of 200μgmL(-1), and inhibition occurred in a dose-dependent manner. Extracellular pH and extracellular conductivity results indicated that eugenol increased membrane permeability...
October 2017: Pesticide Biochemistry and Physiology
https://www.readbyqxmd.com/read/29105800/biocontrol-ability-of-killer-yeasts-saccharomyces-cerevisiae-isolated-from-wine-against-colletotrichum-gloeosporioides-on-grape
#15
Zongling Liu, Shuang Du, Yi Ren, Yanlin Liu
A total of 216 killer yeasts Saccharomyces cerevisiae, isolated from wine, were evaluated in controlling Colletotrichum gloeosporioides, a pre-harvest anthracnose agent of grape. Three of these yeast isolates were tested positive for antagonizing C. gloeosporioides and were further evaluated for their mechanisms as biological control agents (BCAs): production of antifungal compounds, production of hydrolytic enzymes, inhibition of C. gloeosporioides conidia germination, colonization on grape berry, and efficiency in controlling anthracnose of grape...
November 6, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/29104577/interactions-of-root-feeding-insects-with-fungal-and-oomycete-plant-pathogens
#16
REVIEW
Telsa Willsey, Syama Chatterton, Héctor Cárcamo
Soilborne fungal and oomycete pathogens are the causal agents of several important plant diseases. Infection frequently co-occurs with herbivory by root-feeding insects, facilitating tripartite interactions that modify plant performance and mortality. In an agricultural context, interactions between pathogens, herbivores, and plants can have important consequences for yield protection. However, belowground interactions are inherently difficult to observe and are often overlooked. Here, we review the impact of direct and indirect interactions between root-associated insects, fungi, and oomycetes on the development of plant disease...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29099965/cost-of-production-of-telenomus-remus-hymenoptera-platygastridae-grown-in-natural-and-alternative-hosts
#17
Natalia F Vieira, Aline Pomari-Fernandes, Amanda A F Lemes, Alessandra M Vacari, Sergio A De Bortoli, Adeney de Freitas Bueno
The study of the technical and economic aspects of rearing natural enemies is essential for its effective use as a biological control agent in the field. The aim of this study was to determine the cost of production of the parasitoid, Telenomus remus (Nixon; Hymenoptera: Platygastridae), reared in eggs of its natural host, Spodoptera frugiperda (J. E. Smith; Lepidoptera: Noctuidae), and the alternative host, Corcyra cephalonica (Stainton; Lepidoptera: Pyralidae). The insects were reared in accordance with their respective methodologies of laboratory rearing...
November 1, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/29097466/genome-sequences-of-three-strains-of-aspergillus-flavus-for-the-biological-control-of-aflatoxin
#18
Mark A Weaver, Brian E Scheffler, Mary Duke, Linda Ballard, Hamed K Abbas, Michael J Grodowitz
Aflatoxin is a carcinogenic contaminant of many commodities that are infected by Aspergillus flavus Nonaflatoxigenic strains of A. flavus have been utilized as biological control agents. Here, we report the genome sequences from three biocontrol strains. This information will be useful in developing markers for postrelease monitoring of these fungi.
November 2, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29095873/compatibility-of-insecticides-and-fungicides-with-the-zoophytophagous-mirid-predator-nesidiocoris-tenuis
#19
Mohammad Ali Ziaei Madbouni, Mohammad Amin Samih, Jawwad A Qureshi, Antonio Biondi, Peyman Namvar
Nesidiocoris tenuis (Reuter) (Hemiptera: Miridae) is an effective predator of multiple pests of vegetable crops, such as thrips, mites, aphids, whiteflies, leafminers. It is mass-reared and released for augmentative biocontrol programs mainly aimed at controlling whiteflies and Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) in greenhouses and open field. We evaluated the lethal and sublethal toxicity upon N. tenuis adults of label doses of three insecticides (pyriproxyfen, spirotetramat, cypermethrin) and seven fungicides (benomyl, chlorothalonil, copper oxychloride, cyazofamid, fluopicolide + propamocarb hydrochloride (FPH), penconazol, trifloxystrobin) commonly used in various crops...
2017: PloS One
https://www.readbyqxmd.com/read/29093089/rabbit-haemorrhagic-disease-virus-2-gi-2-is-replacing-endemic-strains-of-rhdv-in-the-australian-landscape-within-18-months-of-its-arrival
#20
Jackie E Mahar, Robyn N Hall, David Peacock, John Kovaliski, Melissa Piper, Roslyn Mourant, Nina Huang, Susan Campbell, Xingnian Gu, Andrew Read, Nadya Urakova, Tarnya Cox, Edward C Holmes, Tanja Strive
Rabbit haemorrhagic disease virus 2 (RHDV2; Lagovirus GI.2) is a pathogenic calicivirus that affects European rabbits (Oryctolagus cuniculus) and various hare (Lepus) species. GI.2 was first detected in France in 2010 and subsequently caused epidemics in wild and domestic lagomorph populations throughout Europe. In May 2015 GI.2 was detected in Australia. Within 18 months of its initial detection GI.2 had spread to all Australian states and territories and rapidly became the dominant circulating strain, replacing Rabbit haemorrhagic disease virus (RHDV/GI...
November 1, 2017: Journal of Virology
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