In some cases, bacteria may colonize an animal, although they are perfectly capable of living without their host; bacteria use the host as a source of food, not necessarily for shelter. In most cases, bacteria actually assist their hosts, helping them to digest and break down food, and consuming cast off skin and hair. In other instances, as with pathogenic bacteria , the colonization results in an illness such as plague, tuberculosis , or cholera.
Many people are familiar with the rapid multiplication of bacteria, which can be accomplished in a number of ways. Most commonly, a bacterium grows and splits itself, thus creating exponential growth within a colony as each new generation grows and splits, sometimes within minutes. Hi there! Log in Sign up Buy images Sell images.
Share Alamy images with your team and customers. Current lightbox. Live chat. Covers - Performances of a song with the same name by different artists. Uploaded by Fellirium on February 17, Search icon An illustration of a magnifying glass. User icon An illustration of a person's head and chest.
Sign up Log in. Web icon An illustration of a computer application window Wayback Machine Texts icon An illustration of an open book. Luhung I, et al. Appl Environ Microbiol Oct 1 Recovery of nearly 8, metagenome-assembled genomes substantially expands the tree of life. Parks DH, et al. Ramos-Silva P, et al. Polter SJ, et al. One difficulty with this approach is that microbe communities are constantly changing as conditions change or other microbes are introduced.
This study simulated such microbial tracking in a couple of scenarios, such as touching door handles in an office building and touching various surfaces in a home in a mock burglary. Tracking a person on door handles worked fairly well for up to an hour after the contact, even if other people had also touched the same door handles. However, the accuracy of identifying the "burglar" in a home was not very high, but modifying the analysis from looking at the community as a whole to only rare microbes relatively unique to an individual improved the results.
Labels: bacteria , forensics , genetics , microbiome. Fluorescent SimCells By Fan et al. This makes them great candidates for many purposes, in medicine, industry, and environmental remediation. In some of these purposes, though, there are risks associated with adding foreign microbes, especially engineered ones, that can replicate themselves and possibly persist, into new places. To avoid this risk, this study turns intact bacteria into SimCells, simplified entities with most of their genetic material removed, leaving only the proteins and other components and just enough DNA to accomplish desired tasks.
These SimCells were able to continue performing tasks for around 10 days before running out of the cellular resources needed to keep going. One of these tasks was producing a compound that damaged cancer cells in a dish but left non-cancerous cells unharmed. Labels: bacteria , biodegradation , bioremediation , biotechnology , cancer , genes , genetics , health , proteins , synthetic biology.Some bacteria, like humans, can store sugar in a polymer called glycogen, which can be quickly produced when food is abundant and quickly broken down to ease a transition to fasting. In this study, bacteria that could produce and use glycogen were able to stay active longer and grow better in the face of intermittent starvation.