BACKGROUND Animals are chronically infected by benign and beneficial microorganisms that generally promote animal health through their effects on the nutrition, immune function and other physiological systems of the host. Insight into the host-microbial interactions can be obtained by comparing the traits of animals experimentally deprived of their microbiota and untreated animals. Drosophila m...

A new artificial nutritive medium has been developed for the axenic culture of Artemia enabling the production of adults in less than 1 wk. The techniques for its preparation have been detailed. Its utilization is recommended for the standardized production of experimental animals.

Ž . Axenic rotifers Brachionus plicatilis Muller were cultured under aseptic conditions; they ̈ Ž . were fed either a bacteria-free artificial diet AD , or axenic Isochrysis galbana, or a combination of axenic Chlorella minutissima and the bacteria-free AD. The medium was inoculated with commercial bacterial additives or cultured strains of marine bacteria. The highest improvements in Ž . growth...

As an alternative to the usage of axenic bacteria achieve microbially induced calcium carbonate precipitation (MICP), this study evaluates two non-axenic biomasses as self-healing agents. A fungi-based consortium (Yeast) and heterotrophic nitrifiers (HTN) were harvested from incubation agricultural side streams. The characteristics identified through flow cytometry, total suspended solids volat...

Drosophila melanogaster is an excellent model to dissect the molecular components and pathways of the innate anti-pathogen immune response. The nematode parasite Steinernema carpocapsae and its mutualistic bacterium Xenorhabdus nematophila form a complex that is highly pathogenic to insects, including D. melanogaster. We have used symbiotic (carrying X. nematophila) and axenic (lacking X. nemat...

Small quantities of low-molecular weight peptides have been characterized in the feces of axenic mice. In fecal material of axenic mice fed an autoclaved synthetic (SN) diet, we isolated a dipeptide and characterized its structure as beta-aspartyl-epsilon-lysine. This product was also present in the feces of gnotobiotic mice harbouring Clostridium perenne. We could not detect the product in the...

Axenic and holoxenic rats were fed with a semi-synthetic diet containing 5 p. 100 pectin as the only fiber. Although the microbial flora of the digestive tract converted most of the bile acids in holoxenic rats, it hardly changed the other characteristics of cholesterol and bile acid metabolisms, except intestinal bile salt pools which were much larger in the axenic rats. When the pectin-contai...

conclusions this paper may serve as a guide to screening, isolation, and cultivation of more new mtb. the new isolated strain opens up good opportunities for biotechnological applications such as medicine to bioremediation processes due to its unique abilities. results the results revealed a correlation of important physicochemical factors such as ph and iron with growth and blooms of these bac...

Associated microbiota play crucial roles in health and disease of higher organisms. For macroalgae, some associated bacteria exert beneficial effects on nutrition, morphogenesis and growth. However, current knowledge on macroalgae-microbiota interactions is mostly based on studies on green and red seaweeds. In this study, we report that when cultured under axenic conditions, the filamentous bro...