Gram-negative bacteria

Bacteria are single-cell organisms can appear everywhere. The bacteria live in every climate and location on Earth (in the air, water or land...). When prompted to "bacteria", many people assume that it means negative, but the bacteria perform many important functions for the organism and the environment. The majority of bacteria harmful to humans but still have some kind of beneficial. In the gastrointestinal tract of humans, the good bacteria that aid digestion, producing vitamins and immune…

biochemical tests are a good way to identify unknown bacteria from a sample. It is basically a similar to a trial and error method, but rather than using trial and error a person would be using positive and negative results. Using biochemical tests will help a person identify certain characteristics of the unknown bacteria through a series of chemical tests. Of course more than one biochemical tests must be used in order to ascertain which specific bacteria that a person may have. 2. Biochemical…

determine an unknown species of bacteria. Within the many procedures of identifying the unknown bacteria, I was first given a tube with the unknown bacteria, from which later on I started subcultures by streaking bacteria from the original tube onto a tryptic soy agar (TSA) slant. Throughout the process of identifying the unknown, new subcultures were produced in order to use the newest bacteria to conduct the tests. Thus, this process allowed the unknown bacteria to grow and maintain. Before a…

Purpose Statement: The purpose of this experiment was to determine the Gram stain of the certain slant cultures we used in class, Escherichia coli and Staphylococcus aureus, under a microscope. Since it is the most important staining procedure in microbiology, it is used to distinguish between gram-positive and gram-negative organisms. The gram-positive cells stain purple, and the gram-negative stain a pinkish color. This staining is a differential stain that allows is used to identify the…

functions and properties that make life diverse. In this experiment, we had to deal with infections in two people. In order to treat the infections, we had to conduct a Grams’ test to figure out what kind of infection the children had and then identify the antibiotic that would best treat the infection or if they were antibiotic-resistant bacteria. For this experiment, my hypothesis is that both culture’s A and B will not be antibiotic-resistant and will have at least one antibiotic that will be…

and determining if it’s positive or negative. Performing aseptic techniques is the most crucial step that requires the utilizing of transferring, inoculating, and storing bacterial cultures and media. Aseptic technique is defined as procedures that prevent contamination…

acids such as lanthionine and didehydroalanine. It is a substance produced by both gram positive and gram negative bacteria to control the growth of other bacteria species to reduce competition for substrate and space. Nisin has received attention from researchers making it the most exploited bacteriosin (Shetty, Pometto and Levin, 2006). The attention from bacteriologist is due to its effects against gram positive bacteria that are usually common food spoilers and pathogenic. Industrial…

contained two unknown bacterial cells and they either Gram-negative or Gram-positive. The procedures were followed as stated from the course laboratory manual by Meramec Community College (1). The first step was figuring out the unknowns was to separate the two bacteria. In order to do this, the Trypticase Soy agar was used. The streaking method was used to spread the bacteria across the Trypticase Soy agar to isolate the bacteria. In order to do the streaking method, an inoculating…

ideal staining for identifying a Gram positive bacteria – Please explain your answer? The ideal staining for identifying a Gram positive bacteria is brown-brenn gram stain is preferred to detect the positive bacteria. 13. What is the ideal staining for identifying a Gram negative bacteria – Please explain your answer? The ideal staining for identifying a Gram negative bacteria is the brown-brenn modification is superior for the detection of the gram negative bacteria. 14. How does…

plates for both bacteria A and B using the three-sector streak…