Phylogeny and the distribution of symbiotic bacteria in the mixed segment of the wood-eating termite Nasutitermes takasagoensis (Shiraki) were studied. Bacterial 16S rRNA genes (rDNA) were amplified from the mixed segment of the gut by PCR, and two kinds of sequences were identified. The phylogenetic tree was constructed by neighbor-joining and maximum parsimony methods to identify symbionts ha...

The human distal gut hosts a bustling community comprising thousands of different kinds of bacteria. Fortunately, most of these intestinal residents don’t cause disease but instead play key roles in nutrition, metabolism, pathogen resistance, and immune response regulation. Unfortunately, these beneficial bacteria are just as susceptible to the antibiotics we take to treat pathogenic bacteria. ...

Quorum sensing (QS) is a cell density dependent process that enables bacteria to communicate with each other based on the production, secretion and sensing of the auto-inducer molecules and then subsequently regulate virulence associated gene expression. Interrupting quorum sensing may represent a novel alternative approach to combat bacterial pathogen. Several bacteria can produce quorum quenc...

Health[1] Health[1]child health [2]Health [3]Denmark [4]Videnskab.dk [5] Scientists have studied gut bacteria in children and discovered that at least 21 per cent of the bacteria are resistant to one or more types of antibiotics. Just a few decades ago, doctors could not see any resistance among the many trillions of bacteria living in the human gut. But today even small children carry resistan...

Archaea are habitual residents of the human gut flora but are detected at substantially lower frequencies than bacteria. Previous studies have indicated that each human harbors very few archaeal species. However, the low diversity of human-associated archaea that has been detected could be due to the preponderance of bacteria in these communities, such that relatively few sequences are classifi...

The gastrointestinal tract (GIT) represents the largest interface between the human organism and the external environment. In the lumen and upper part of the mucus layer, this organ hosts an enormous number of microorganisms whose composition affects the functions of the epithelial barrier and the gut immune system. Consequentially, the microorganisms in the GIT influence the health status of t...

BACKGROUND Late onset sepsis (LOS) in preterm infants is associated with considerable morbidity and mortality. While studies have implicated gut bacteria in the aetiology of the disease, functional analysis and mechanistic insights are generally lacking. We performed temporal bacterial (n = 613) and metabolomic (n = 63) profiling on extensively sampled stool from 7 infants with LOS and 28 match...