background: populations of magnaporthe, the causal agent of rice blast disease, are pathotypically and genetically diverse and therefore their interaction with different rice cultivars and also antagonistic microorganisms are very complicated. objectives: the objectives of the present study were to characterize phylogenetic relationships of 114 native  magnaporthe strains, isolated from rice an...

An interesting property for many probiotic strains is to exhibit antimicrobial activity against pathogenic microorganisms. Therefore, the of potentially strain Lactobacillus acidophilus L12 Escherichia coli, Staphylococcus aureus and Salmonella sp. was examined in vitro through co-culturing with each 72 h. When cultured individually, all reached a final population always exceeding 10 12 cfu/mL....

background: strepotococcosis caused by streptococcus iniae is one of the important emerging bacterial diseases in aquaculture sector worldwide. objectives: in this study, the genetic diversity of s. iniae strains was assessed in some rainbow trout farms in iran. methods: gram positive and catalase negative bacterial isolates were first obtained from 100 trout fish farms in 8 states using routin...

the biological control ability of fluorescent pseudomonas spp. results from competition for space and untrient, antibiosis and colonization in the rhizosphere. biocontrol fluorescent pseudomonads produce a wide variety of antibiotics. in this study, the biocontrol ability of 39 strains of biocontrol pseudomonas fluorescens, was examined against fusarium graminearum the causal agent of wheat fus...

The diversity and cold-active hydrolytic enzymes of culturable bacteria associated with sandy sediment from Nella Fjord, Eastern Antarctica (69°22'6″ S, 76°21'45″ E) was investigated. A total of 33 aerobic heterotrophic bacterial strains were isolated at 4 °C. These bacterial isolates could be sorted into 18 phylotypes based on the 16S rRNA gene sequence belonging to four phyla, namely Alphapro...

three extracts of pulicaria dysenterica were examined for antibacterial activity using the agar disk-diffusion method against six bacterial strains. some of these extracts were found to be active against some bacterial strains. the methanolic extract exhibited a superior level of antibacterial activity. all of the extracts were active against vibrio chlorea.

We investigated the role of bacterial adherence and hemolysin production from Escherichia coli parent and genetically cloned strains as to their effects on histamine release from rat mast cells and leukotriene generation from human polymorphonuclear granulocytes. These mediators were involved in the induction of inflammatory disease processes and led, for example, to enhancement of vascular per...

alfalfa (medicago sativa) is among a few of the most important forage crops for the growth of which hamedan province benefits from a suitable climate. alfalfa bacterial wilt disease induced by clavibacter michiganensis subsp. insidiosus cause substantial economic crop losses. this disease has not been so far investigated extensively in hamedan province. in the course of this survey affected pla...