B- Bacteria
Bacteria
Bacteria
bacteria
What biological agaent may be susceptible to anyti-biotics, but can develop resistance? bacteria
Bacteria
They develop resistance to antibiotics .
These are the bacteria.Bacteria are (usually) single-celled microorganisms consisting of cytoplasm surrounded by a cell wall. They contain genes, but these are not in a nucleus separated from the cytoplasm as is the case in many other organisms eg animals and plants.Bacteria may be killed by antibiotics but can develop resistance to the anitbiotic. This ocurs when antibiotics are used unnecessarily or a course of tablets is not finished. Any individual bacterial cells which can resist the antibiotic will survive and reproduce, passing ion the genes for resistance to their offspring. The resistant individuals will therefore become more common. This is an example of how natural selection works.See http://en.wikipedia.org/wiki/Antibiotic_resistance
Bacteria
bacteria
Bacteria, like all organisms, have phenotypic variations. Some bacteria are resistant to antibacterial drugs and survive the onslaught of these drugs. They then go on to have progeny ( by fission ) that they confer this resistance on so that you have a new population of resistant bacteria.
Saccharomuces Boulardii in lyophilized form does not develop any resistance in normal flora of intestines. But antibiotics should be used with great care and only under the supervision of a qualified Doctor.
Individual pathogens can develop resistance to antimicrobial drugs through several mechanisms. These include acquiring genes that code for drug resistance, mutations that render the drug targets less susceptible to the drugs, and the ability to pump out or destroy the drugs. These adaptations occur through genetic changes that give the pathogens a survival advantage and allow them to evade the action of the drugs.
Antibiotics have always been considered one of the wonder discoveries of the 20th century. This is true, but the real wonder is the rise of antibiotic resistance in hospitals, communities, and the environment concomitant with their use. The extraordinary genetic capacities of microbes have benefitted from man's overuse of antibiotics to exploit every source of resistance genes and every means of horizontal gene transmission to develop multiple mechanisms of resistance for each and every antibiotic introduced into practice clinically, agriculturally, or otherwise. This review presents the salient aspects of antibiotic resistance development over the past half-century, with the oft-restated conclusion that it is time to act. To achieve complete restitution of therapeutic applications of antibiotics, there is a need for more information on the role of environmental microbiomes in the rise of antibiotic resistance. In particular, creative approaches to the discovery of novel antibiotics and their expedited and controlled introduction to therapy are obligatory.