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Bacteria growing on anagar plate.Antibiotic resistance tests: Bacteria are streaked on the dish on which antibiotic impregnated white disks are placed. Bacteria in the culture on the left are susceptible to the antibiotic in each disk, as shown by the dark, clear rings where bacteria have not grown. Those on the right are fully susceptible to only three of the seven antibiotics tested.[1]
Anantibiotic (orantibacterial) is a chemical compound is made tokillbacteria or slow theirgrowth. They are used asmedicines to treat andcuredisease caused by bacteria. The first antibiotic discovered wasPenicillin, a natural antibiotic produced by afungus. Production of antibiotics first began in 1939, and in the modern day, they are made bychemical synthesis. Antibiotics can not be used to treat anyvirus.
Antibiotics can be the most effective way of treating bacterial infections. A clue to this might been found inPasteur's work. He had a culture ofanthrax germs that were left exposed to air. They developed colonies of many fungi, but the anthraxbacilli disappeared. Medical science was not, at the time, ready to see the implication of this.
It was 1928 that the study of antibiotics started,a small chance beginning.Alexander Fleming, a Londonbacteriologist, was culturingstaphylococcus. In onePetri dish amould appeared and spread On the nutrientgelatin of the dish each patch of mould was surrounded by clear ring, free of bacteria. Moreover, the extracted substance was able to clear up infectedwounds.
The termantibiotic was first used in 1942 bySelman Waksman and his collaborators in journal articles to describe any substance produced by a microorganism that isantagonistic to the growth of other microorganisms in high dilution.[3] This definition cut out substances which kill bacteria, but are not produced by microorganisms, such as gastric juice andhydrogen peroxide. It also excludedsynthetic antibacterial compounds such as thesulfonamides. With advances inmedicinal chemistry, most of today's antibacterials chemically are modifications of various natural compounds.[4]
Certain bacteria are only affected by specific types of antibiotics. Antibiotics fight infection caused by bacteria. Patients might need different types or different amounts of antibiotics depending on what bacteria is causing their health problems. Because of this, antibiotics should always be used under the supervision of a medical doctor (or other certified medical practitioner). The doctor can also watch for side effects and change the patient's treatment when necessary. Antibiotics are very useful when your body is infected by a bacteria. Antibiotics don't kill virus, so it is useless against a viral infection. A doctor must determine if a patient's infection is of viral or bacterial origin before taking antibiotics, this is another reason why a medical doctor should prescribe antibiotics instead of relying on self-medication.
Teixobactin is the first new antibiotic discovered in forty years. It is active againstgram-positive bacteria, includingStaphylococcus aureus. It appears to be one of a new class of antibiotics.[5][6]
Today, people worry thatbacteria will not be affected by antibiotics. Bacteria doevolve, and already many strains of bacteria resist regular antibiotics.[7] When exposed to antibiotics, most bacteria die quickly, but some may havemutations which make them slightly less susceptible. These bacteria then multiply and make a large colony which is less affected by the antibiotic.
Part of this problem is caused by the over-use and misuse of antibiotics. If someone is sick with a virus, antibiotics will not affect the virus. Some doctors will still prescribe an antibiotic so the patient feels as though they are being treated for their illness. The other problem is that many people do not use antibiotics correctly. People often stop taking the medicine when they start feeling better. But antibiotics don't kill all of the bad bacteria at once. Bacteria which are moreresistant do not die right away. When someone stops taking the antibiotic too quickly, these resistant bacteria can reproduce and survive. Then the antibiotic does not work so well because the bacteria are less affected by it.
Resistance, as discussed in "WHO AWaRe classification for antibiotic stewardship: tackling antimicrobial resistance – a descriptive study from an English NHS Foundation Trust prior to and during the COVID-19 pandemic," illustrates the critical challenge of antimicrobial resistance (AMR). This study demonstrates the pivotal function of the WHO’s AWaRe classification in directing antibiotic use to combat AMR. It stresses the necessity of comprehensive antimicrobial stewardship before and during health crises to maintain antibiotic effectiveness against emerging pathogens.[8]
