Cooperating bacteria isolate cheaters Bacteria, which reciprocally exchange amino acids, stabilize their partnership on two-dimensional surfaces and limit the access of non-cooperating bacteria to exchanged nutrients. Bacteria that do not contribute to metabolite production are excluded from the cooperative benefits. The researchers demonstrated that cooperative cross-feeders that grow on two-dimensional surfaces are protected from being exploited by non-cooperating bacteria.
Bacteria engineered with synthetic circadian clocks Many of the body's processes follow a natural daily rhythm or so-called circadian clock, so there are certain times of the day when a person is most alert, when the heart is most efficient, and when the body prefers sleep. Even bacteria have a circadian clock, and in a new study, researchers designed synthetic microbes to learn what drives this clock and how it might be manipulated.
Surprising diversity of TB strains found in Ethiopia Ethiopia is a hotspot for tuberculosis (TB) infection, ranking third among African countries and eighth in the world for TB burden according to the World Health Organization. But, say researchers who have analyzed the genomes of 66 TB strains, that's most likely not because TB was absent in the country before Europeans made contact. Rather, Europeans may have introduced a new wave of disease spread by more virulent TB strains.Our water pipes crawl with millions of bacteria Our drinking water is to a large extent purified by millions of "good bacteria" found in water pipes and purification plants, Swedish researchers have found. So far, the knowledge about them has been practically non-existent, but this new research is about to change tha