Antimicrobial Potentials of Fresh Allium Cepa against Gram Positive and Gram Negative Bacteria and Fungi
نویسندگان
چکیده
Study of the antimicrobial potentials of Allium cepa revealed that all the extracts from both fresh and old samples showed different ranges of antimicrobial activities. Ethyl acetate fraction showed inhibitory activities against all the 8 microbes tested including bacteria and a fungus. Chloroform followed by butanol fraction also inhibited the activity of all the microbes except Pseudomonas aeruginosa which was highly resistant. Petroleum ether fraction was effective at both lower and higher concentration. Ethanol and water sub-fractions were found least effective or ineffective. Among gram positive microbes, Bacillus subtilus was the most susceptible bacteria inhibited by all extracts while the most resistant gram positive bacteria was Staphylococcus aureus. Erwinia caratovora and Klebsella pneumonia were the most susceptible gram negative bacteria while Pseudomonas aeurginosa and Salmonella typhi were the most resistant bacteria.
منابع مشابه
Antimicrobial activity of Cyanobacteria isolated from hot spring of Geno
Cyanobacteria, the blue green algae are one of the most diverse groups of Gram-negative photosynthetic prokaryotes widely distributed throughout the world. Cyanobacteria are known to produce a wide range of secondary metabolites with various biological actions. The aim of this study was to test extracts from various cyanobacteria isolated from Geno hot spring, Bandar Abbas (Iran) against a dive...
متن کاملAntimicrobial Screening of Fennel at the Seedling Stage
A wide range of medicinal plant parts that possess varied medicinal properties are used for extracts as raw drugs. In this study, the ethanolic extract obtained from aerial parts of fennel (Foeniculum vulgare Mill.) seedlings was evaluated in vitro to examine their antimicrobial activity against four Gram-negative and three Gram-positive bacteria and two fungi. Aerial parts of one-month-old see...
متن کاملAntimicrobial Effects of Some Persian Gulf Marine Sponges
Background: We investigated in vitro antimicrobial activity of five marine sponge species collected from Kish Island in the Persian Gulf: Fascaplysinopsis reticulata, Callyspongia clavatus, Callyspongia siphonella, Niphates furcata, and Pseudosuberites clavatus against gram positive bacteria, gram negative bacteria, fungi and yeasts. Materials and Methods: Sponage extracts were prepared by two ...
متن کاملIn Vitro antimicrobial activity of Allium cepa (dry bulbs) against Gram positive and Gram negative bacteria and fungi.
The present research was carried out at the Institute of Biotechnology and Genetic Engineering, the University of Agriculture Peshawar KPK Pakistan. Analysis of the data revealed that all the extracts from dry bulbs showed different ranges of antimicrobial activities. Ethyl acetate fractions showed inhibitory activities against all tested eight microbes including bacteria and a fungus while chl...
متن کاملSynthesis of 1,5 and 2,5-disubstituted tetrazoles using NiO nanoparticles and their evaluation as antimicrobial agents
Treatments of tetrazolate salts prepared in situ from various aldehyde; malononitrile and sodium azide in the presence of NiO nanoparticles with benzyl bromide gave the corresponding 1,5- and 2,5-disubstituted tetrazoles. Reaction of tetrazolate salts with 2,4′-dibromoacetophenone in the presence of NiO nanoparticles provided the corresponding 2,5-disubstituted derivatives as an only isomer. T...
متن کامل