The purpose of this work was to screen the actinomycetes having antitumor or antimicrobial activity, which were isolated from the surface, epidermis and intestines of sea plants and animals collected from the Taiwan Strait, China. Antitumor activity was studied by the MTT assay and DNA target activity was studied by the biochemical induction assay while antimicrobial activity was determined by ...

Salt-tolerant alkaliphilic actinomycetes are difficult to isolate as their natural environments are much more different and hostile than laboratory conditions. Due to these limitations, majority of the microbial population remain uncultivated. During the recent years, development and application of molecular techniques, such as; DGGE, TGGE, RFLP and DNADNA hybridization have proved quite valuab...

Actinomycetes are filamentous, Gram-positive bacteria widely distributed in soil and can produce secondary metabolites useful as antibiotics. The synthesis of is influenced by the growth conditions each isolate, including fermentation period. Klebsiella pneumoniae an opportunistic bacterial pathogen causing lower respiratory tract infection. Objectives: To determined inhibition activity with di...

Abstract. Fatmawati U, Qurrata’aini MR, Rosyidi NW, Sari DP, Santosa S. 2023. Optimization of culture medium and bioformulation rhizobial actinomycetes to enhance soybean plant growth. Biodiversitas 24: 2912-2918. Actinomycetes are a group Gram-positive bacteria that well-known for having growth-promoting activity. In an earlier study, Streptomyces sp. strain ASR 58 67, isolated from rhizospher...

Actinomycetes are comprised of diverse group of organisms that are Gram positive with guanine plus cytosine content in their DNA being greater than 55M % [1]. The term actinomycetes is coined from two greek words, atkis meaning ray and mykesmeaning fungus [2]. This is because the organisms have both fungi and bacteria like features. Like fungi, they form mycelia network branching filaments whil...

The BioMerieux ID 32C Yeast Identification System was examined to determine its usefulness as a rapid method for the identification of medically important aerobic actinomycetes. More than 290 strains were tested by this method and the results were compared to those obtained by conventional methods. It was found that aerobic actinomycetes could be differentiated to species level in 7 days by the...

The diversity of fungi, bacteria, yeast, actinomycetes and protozoa were analysed in the gut and casts of Eudrilus eugeniae, Lampito mauritii, Eisenia fetida and Perionyx excavatus, both qualitatively and quantitatively as influenced by different feed substrates like clay loam soil, cowdung and pressmud. While actinomycetes (Streptomyces albus, S. somaliensis, Nocardia asteroides, N. caviae and...

The number and types of microorganisms in the gut of Culex quinquefasciatus larvae varied considerably from one site of collection to another. Larval gut, in general, contained enormous number of bacteria, a few fungi and negligible number of actinomycetes which belonged to 15 bacterial, 6 fungal and 4 actinomycete genera, respectively. Bacillus sp., Staphylococcus sp. and Pseudomonas sp. among...

A new technique for the selective isolation of actinomycetes from natural mixed microbial populations is described. A nutrient agar medium was overlaid with a 0.22- to 0.45-microns-pore cellulose ester membrane filter, and the surface of the filter was inoculated. During incubation, the branched mycelia of the actinomycetes penetrated the filter pores to the underlying agar medium, whereas grow...

background and objective : due to the evolution of multidrug-resistant strains, screening of natural resources, especially actinomycetes, for new therapeutic agents discovery has become the interests of researchers. in this study, molecular, chemical and biological screening of soil actinomycetes was carried out in order to search for peptide-producing actinomycetes. materials and methods : 60 ...