objectives:biofilms are communities of bacteria attached to surfaces through an external polymeric substances matrix. in the meantime, acinetobacterbaumannii is the predominant species related to nosocomial infections. in the present study, the effect of silver nanoparticles alone and in combination with biocides and imipenem against planktonic and biofilms of a. baumannii was assessed.  materi...

Some soil bacteria protect plants against soil-borne diseases by producing toxic secondary metabolites. Such beneficial biocontrol bacteria can be used in agricultural systems as alternative to agrochemicals. The broad spectrum toxins responsible for plant protection also inhibit predation by protozoa and nematodes, the main consumers of bacteria in soil. Therefore, predation pressure may favou...

mastitis, inflammatory disease of mammary glands, can be caused by various microorganisms. many antimicrobial agents have been evaluated to combat the causative agents. development of resistance in pathogens against conventional antibiotics may be high; hence at present study in vitro efficacy of a new fluoroquinolone antibiotic (marbofloxacin) against isolated pathogens from clinical mastitis ...

Background and Objectives: Vibrio parahaemolyticus is the causative agent of gastroenteritis due to consumption of contaminated seafood. The aim of the present study was to determine the chemical composition of Essential Oils (EOs) of five plants (Artemisia absinthium, Zataria multiflora Boiss., Pulicaria gnaphalodes, Trachyspermum ammi and Cuminum cyminum) and to evaluate their antimicrobial a...

We investigated the relationship between the genetic diversity of indigenous soybean-nodulating bradyrhizobia and their geographical distribution in the United States using nine soil isolates from eight states. The bradyrhizobia were inoculated on three soybean Rj genotypes (non-Rj, Rj(2)Rj(3), and Rj(4)). We analyzed their genetic diversity and community structure by means of restriction fragm...

Two strains, HG104 and ASSO, were isolated Crom the soil of Tehran's suburbs. Taxonomic studies showed thatHG104 and AS50 belong to Mycobacterium spp. and Brevibacterium spp. respectively, which produce antibacterial substances with relatively high activity against some important clinical Gram-positive and Gramnegative bacteria

Antimicrobial activity of different parts of Croccus sativus L. (saffron) including stigma, stamen, leaves and colora, extracted by various solvents, were tested against different bacteria (Microccucos luteus, Staphylococcus epidermitis, Staphylococcus aureus and E. coli) and fungi (Candida albicans, Aspergillus niger and Cladospourium sp) by cup plate diffusion method. Minimal Inhibitory Conce...