Third Generation Cephalosporin
Cephalosporins are antimicrobial drugs that were first discovered in 1945 by Giuseppe Brotzu. Brotzu was a University of Cagliari professor and a Sardinia government official who worked to eradicate malaria. It was found that cultures of fungi called Cephalosporium acremonium, which came from sewage water, could inhibit the growth of other bacteria. Since then, many cephalosporin drugs have been formulated, among them the third generation cephalosporin, which has a broader spectrum of activity.
Part 1: What Is Cephalosporin? How Do They Work?
Cephalosporins consist of a group of semisynthetic antibiotics with a broad-spectrum of activity. They are derived from fungi called Cephalosporium, which are known to inhabit soil and
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influenzae and some enterobacteria like E coli, Klebsiella pneumoniae, and Proteus mirabilis. These bacteria do not produce β-lactamase
Ceftazidime is effective against Pseudomonas aeruginosa
Some of these third-generation cephalosporin drugs have poor activity against gram-positive (G+) bacteria. Ceftibuten and cefixime only have slight activity against S. aureus, so if it is used for infections in the skin and soft-tissues, it should be limited to uncomplicated streptococcal infections.
The following cephalosporins in this class are used for many clinical conditions:
Oral medications
Cefixime
Unknown Lab Report Abiola Oyewumi March 16, 2015 Unknown #16 Abstract An experiment was conducted to determine which of the following unknown bacteria was in test tube number 16: Escherichia coli, Enterobacter aerogenes, Klebsiella pneumoniae, and Salmonella typhimurium. Biochemical tests were used to help identify the unknown bacteria. The Citrate test, Urease test, Triple Sugar Iron Agar test, Voges-Proskauer test, and Methyl Red test were the biochemical tests used in this experiment.
PHAR 100 Assignment 3 1. Antibiotics are a form of medicine that seek out and destroy the bacteria that make us feel sick. Antibiotics work great against bacteria, however they don’t work against viruses. Penicillin was the first antibiotic to be discovered by Alexander Fleming, and it was first used to treat infections. Essentially, these powerful medicines fight bacterial infections, and have the potential to save lives.
Florey and his colleagues at Oxford developed the antibiotic use for the penicillium mold however because Britain was under siege, they did not grant any funding or support. This lead to Florey and his colleagues going to the US for help which they gladly offered. The US gladly granted it and Florey and his colleagues began testing and eventually came up with an antibiotic. They began testing in 1942 and a year later, it entered the war. It was a game-changer because it was universal to many infections and later on, became cheap and abundant.
Moreover, Penicillin, a group of antibiotics, was discovered during this time, specifically in the 1928s by Alexander Fleming (ACS, 2023). Although the first dose of penicillin was used in 1941 by Albert Alexander, it was still a life-changing discovery as it changed the lives of many - even after the period of 1918s1939s (Wood, 2010). The discovery of penicillin allowed a lot of life-threatening diseases to be treated, such as bronchitis, tonsillitis, and pneumonia. Penicillin is known to save millions of lives. Indeed, in just World War Two, the death rate because of bacterial pneumonia would go from 18% to 1%, because of the invention of penicillin.
Until 1940, doctors could not find a cure for this disease. After that year, doctors discovered a treatment for primary, secondary, and early latent syphilis. The most used antibiotic to treat this affliction is penicillin and it is extremely effective. It only requires a single intramuscular injection of penicillin to those stages, and for those who are allergic to penicillin they can use other antibiotics such as tetracycline, doxycycline and other antibiotics. Those antibiotics are less effective than penicillin.
al studied the use of cefazolin as prophylaxis antibiotic almost similar with the practice in our institution.10 11 They confirmed that cefazolin has the safety and efficacy in preventing infective complications related to pacemaker implantation or replacement.10 12 Thus, it is comparable to our study that practice of using cefazolin after the implantation procedure will have the benefit in reducing the risk of infection after implantation
We thought that Penicillium was not inhibited because of structural differences between it and the susceptible fungi, but it is possible that penicillin killed off the bacteria. Unfortunately, the short stay prevented us from confirming our theory, and I left Costa Rica, longing for an extended research
The effectiveness of using these three drugs on a people with smallpox has not been established since they have not been tested on people that had the disease. In the event of a smallpox outbreak consideration may be given to use these
The six bacteria used in this lab were, Citrobacter freundii, Bacillus subtillis, Enterobacter aerogenes, Staphylococcus epidermis, Enterococcus durans, and Escherichia coli. Citrobacter freundii is a Gram-negative rod shape bacteria. The MSA plate will grow Citrobacter freundii, Bacillus subtillis, Enterobacter aerogenes and will have a yellow color change while Staphylococcus epidermis will not grow nor have a color change to yellow. The MacConkey agar will have growth with Escherichia coli, Enterococcus durans, but not Staphylococcus epidermis and Bacillus subtilis since it is a Gram-positive.
For instance, Rifampin, an antibiotic used to treat Tuberculosis, Neisseria meningitidis- also known as Meningitis- or infections in the nose and throat. Another treatment is a vaccine known as Bacillus Calmette- Guerin to prevent T.b. or to heal bladder tumors or bladder cancers. “It wasn’t that all these infectious diseases had simultaneously changed to be less deadly (Humphries/ Bystrianyk 15). It was the environment in which they had existed had shifted from one where they were very often deadly to one where they were they were not a significant threat (Humphries/ Bystrianyk 15).
This led to the development and use of a penicillinase resistant beta-lactam antibiotic, including oxacillin and flucloxacillin. Combination therapy with gentamicin can also be used to treat more serious infections, but it can have a high risk of kidney
Also, these scientists and physicians tested for an effective treatment for
epidermidis showed growth only in tubes 7, 8, and 9 after incubation period. Whereas tubes 1 through 6 for concentration between 100 ug/ml to 3.12 ug/ml were observed with no bacterial growth (clear). The minimum concentration at which the growth is inhibited in visual observation was recorded as MIC. This MIC for Vancomycin was 3.12 ug/ml in this experiment. To further examine whether or not the Vancomycin is bactericidal for S. epidermidis and at what concentration, the media plates prepared from the clear tubes in MIC determining step were examined.
This is where the antibacterial disc bacitracin was used to determine the bacteria’s susceptibility.
At the time not even the most straightforward diseases, for example,not even the common cold was curable. Until the best medicinal disclosure at the time was accidently found in 1928. Starting its potential amid World War 2, the entire world needed its hands on it. It was Penicillin. Penicillin left an imprint in our history, it expanded medicinal innovation, manufacturing and even diminished diseases.