Search results
Results from the WOW.Com Content Network
It is ideally spatially unstructured and temporally unstructured, in a steady state defined by the rates of nutrient supply and bacterial growth. In comparison to batch culture, bacteria are maintained in exponential growth phase, and the growth rate of the bacteria is known. Related devices include turbidostats and auxostats.
Drug resistant bacteria multiply as well, but upon drug treatment, the bacteria continue to spread. [ 13 ] The WHO defines antimicrobial resistance as a microorganism's resistance to an antimicrobial drug that was once able to treat an infection by that microorganism. [ 3 ]
Motile bacteria (left) will grow out from the stab line while non-motile bacteria (right) are present only along the stab line. Stab cultures are similar to agar plates, but are formed by solid agar in a test tube. Bacteria is introduced via an inoculation needle or a pipette tip being stabbed
Most commonly apparent in species that reproduce quickly and asexually, like bacteria, exponential growth is intuitive from the fact that each organism can divide and produce two copies of itself. Each descendent bacterium can itself divide, again doubling the population size (as displayed in the above graph). [ 2 ]
Hydrocarbonoclastic bacteria (also known as hydrocarbon degrading bacteria, oil degrading bacteria or HCB) are a heterogeneous group of prokaryotes which can degrade and utilize hydrocarbon compounds as source of carbon and energy. Despite being present in most of environments around the world, several of these specialized bacteria live in the ...
They can also spread easily as they contain genes for constructing pili, which allow them to transfer the R-factor to other bacteria. [13] R-factors have contributed to the growing antibiotic resistance crisis because they quickly spread resistance genes among bacteria. [14] The R factor by itself cannot be transmitted. [citation needed]
RELATED: The 25 best fast-food chains . Six samples don't make for a very complete study — but there are reasons to believe that fancy restaurants tend to have more bacteria than fast-food.
If the urine is sterile and the culture pure the bacteria multiply so fast that in the course of a few hours their filaments fill the fluid with a downy felt. But if when the urine is inoculated with these bacteria an aerobic organism, for example one of the "common bacteria," is sown at the same time, the anthrax bacterium makes little or no ...