Which Antibiotics Kill The Most Bacteria

Decent Essays
Title: Which Antibiotics Kill the Most Bacteria? Caroline Gorman April 2, 2016 HB bl. 6
Purpose: The purpose of this lab was to determine which of five common antibiotics would kill the Rhodococcus rhodochrous bacteria.
Hypothesis: Out of the five tested antibiotics, doxycycline will kill the most Rhodococcus rhodochrous because it is generally used to treat mild infections. This will be tested by spreading the bacteria on agar in a Petri dish and adding a small amount of each antibiotic to the Petri dish.
Research: Professor Stephen Bell at Indiana University studies the structure, behavior, and evolution of archaebacteria. Recently, he did research on the Sulfolobus genome and how they reproduce. Most archaebacteria, he says, have a

Related Documents

  • Superior Essays

    However, my predictions on the order of highest to lowest zone of inhibition for the three antibiotics were proven wrong. Instead of the order neomycin, erythromycin, and tetracycline, results from figure 3 shows erythromycin, tetracycline, and then neomycin in the order of highest zone of inhibition to lowest. These predictions that was base on previous experiments from (Mcbride et al 2007) and (Wendelbo et al., 2003) were falsified. There is however limitation to my experiment because of the small sample size that consisted only of five agar trays. If more trials were done, we may get results closer to the sources.…

    • 1462 Words
    • 6 Pages
    Superior Essays
  • Superior Essays

    Introduction: The effectiveness of Antimicrobial agents against Microorganisms Population of microorganisms or growth are killed and/or inhibited by natural or synthetic chemical antimicrobial controls (Madigan, et al 2012). Antimicrobial agents are grouped according to their efficacy against microorganisms. Bactericidal that kill and bacteriostatic prevent and/or reduce growth (Madigan et al, 2012).…

    • 2232 Words
    • 9 Pages
    Superior Essays
  • Improved Essays

    Data of table 2 demonstrates that E.coli strains produced sort of difference in resistance. 310217 type showed resistant to all antibiotics investigated whereas, E. coli strain 704476/2 showed sensitivity to all antibiotics experimented. Table 3. Results (below) for the microbial toxin tests performed on selected bacterial organisms.…

    • 931 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    a. The Wescodyne was the most effective against E. coli and Staphylococcus aureus. The zone of inhibition around the Wescodyne for both bacteria was over 20 mm. Only Wescodyne was able to inhibit both bacteria. E. coli was inhibited by hydrogen peroxide and 70% ethyl alcohol.…

    • 1008 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    All of the isolates shown in Table 1 were resistance to S. aureus and were considered antibiotic producers. However, only isolate 12 and 16 showed resistant to the unknown Gram-negative organism. All of the antibiotic producers were then tested against Enterococcus faecalis, Pseudomonas putida, Acinetobacter baylyi, Escherichia coli, and Enterobacter aerogenes by the streak-plate method, which can be seen in Table 2. As demonstrated in Table 2, none of the antibiotic producers were found to be resistant against Enterococcus faecalis or Pseudomonas putida. Table 2 also showed isolates 3 and 4 were resistant to Acinetobacter baylyi, isolate 12 was resistant to Escherichia coli, and isolates 12 and 16 were resistant to Enterobacter aerogenes.…

    • 1184 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    To start with, look at the effectiveness of Antibacterial Hand Soap, against Bacillus and E.Coli. As it was stated, Bacillus is gram positive with spores and E. Coli is gram negative with no spores. But the hand soap was the most effective towards both. The reason behind this is because it contains the active ingredient Triclosan. Triclosan is a broad spectrum antiseptic that is effective because it blocks the active site of the bacteria so it is not allowed to reproduce and dies.…

    • 1872 Words
    • 8 Pages
    Improved Essays
  • Improved Essays

    This may be in a new, stronger antibiotic that is able to disarm and kill these…

    • 1041 Words
    • 4 Pages
    Improved Essays
  • Superior Essays

    Thus, out of the three antibiotics, chloramphenicol can be interpreted as the most effective against both S. enteritidis and S. epidermidis. Against S. epidermidis, vancomycin can be seen as the second most effective and nalidixic acid as the least effective antibiotic. Nalidixic acid was almost as effective against S. enteritidis as chloramphenicol was, and vancomycin had no effect as…

    • 1172 Words
    • 5 Pages
    Superior Essays
  • Improved Essays

    Wolf In Sheweed Summary

    • 539 Words
    • 3 Pages

    On October 31, 2017, at 4:00 pm, I attended the Department of Biology Seminar Series hosted by Dr. Richard Gomer that helped in the Biological Sciences Building East, Room 115. The lecturer was Dr. Carolyn Cannon from the Department of Microbial Pathogenesis and Immunology at the College of Medicine TAMHSC. What intrigued me to go to this lecture was the title, “Wolves in Sheep's Clothing: Killing Bacterial Pathogens with Innocuous Compounds. Surprisingly the title did match the content that Dr. Cannon was conveying to her audience.…

    • 539 Words
    • 3 Pages
    Improved Essays
  • Decent Essays

    Solution CTQ 04: Fundamental Concept:  An agent lethal to bacteria is bactericidal and which inhibits the growth of bacteria is bacteriostatic.  Effectiveness of control agent depends on its concentration, time of exposure and its activity (cidal or static) Solution: • Microbial control agents are of two types based on their effect on microbial cells which are either bactericidal or bacteriostatic. • Bactericidal antibiotics kill (cidal) the bacteria Ex: Polymixin B is a bactericidal agents which disrupts the plasma membrane resulting in leaking the contents creating imbalance in the cell. • Bacteriostatic antibiotics suppress the growth of bacteria…

    • 386 Words
    • 2 Pages
    Decent Essays
  • Improved Essays

    Tetanus Research Paper

    • 601 Words
    • 3 Pages

    There are exactly 166 antibiotics in today’s world. Each antibiotic in the world has a specific job to do when it comes to killing and stopping deadly bacteria. If one antibiotic does not work, then try another one. Some antibiotics are very strong and can kill bacteria at the presence of it, but some antibiotics are not strong enough to kill them. Tetanus is a fatal, acute disease which is caused by exotoxin produced by the bacterium Clostridium tetani.…

    • 601 Words
    • 3 Pages
    Improved Essays
  • Decent Essays

    Antimicrobial resistance is a global problem and is causing a serious threat to the prevention and treatment of an increasing range of diseases. The misuse of antibiotics does not cause the resistance but affects the spread of resistance. Bacteria adapt, mutate and multiply rapidly, therefore the problem cannot be solved completely, but if correct procedures will be implemented, the process can be slowed down. Without the effective global action many standard medical treatments will fail, resulting in death or disability of individuals or will turn into high risk procedures. The problem creates a need for developing stronger antibiotics in the future, but it is not certain that it can be achieved, as new antibiotics are difficult to find and…

    • 132 Words
    • 1 Pages
    Decent Essays
  • Improved Essays

    Dalise Atwell BIO 212 Dr. Boles Excelsior College Penicillin and its Impact on Microbiology Penicillin has saved many lives past and current. “Before the discovery and use of penicillin, infectious diseases had been the leading cause of death throughout history. Furthermore, the therapeutic tools available for treating infections were few and of limited use. ”(Kardos 2011) Penicillin has been the drug of choice when treating many diseases.…

    • 1218 Words
    • 5 Pages
    Improved Essays
  • Improved Essays

    For more than 70 years, antibiotics have been used to treat bacterial infections of the body. The first appearance of this life changing medicine, was in the 1940’s on the battlefield. This medicine was named penicillin, the drug saved many from the brink of death, by fighting bacterial diseases; from then on antibiotics changed the face of medicine. Infection was no longer an impregnable wall that had to be broken down before the real treatment could begin, infections could be treated on site, at moments notice. As time passed, the world became co-dependent on the use of antibiotics to treat all of the body 's infections, and was repeatedly misused.…

    • 772 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    Antibiotic Testing

    • 1638 Words
    • 7 Pages

    INTRODUCTION: Over prescription and extensive use of antibiotics has caused antibiotic resistance at an shocking rate (Mezger et al.2014). The main aims of Antibiotic sensitivity testing is detecting possible drug resistance in common pathogens by in-vitro testing of bacterial cultures with antibiotics to determine susceptibility of bacteria to antibiotic therapy. The tests are frequently used when the etiologic agents are members of species capable of resistance to commonly prescribed drugs (Jenkins and Schuetz,2012). The most-widely used tests in clinical laboratories include Manual: Broth Microdilution, Disc Diffusion and E-test.…

    • 1638 Words
    • 7 Pages
    Improved Essays