Gram-negative bacteria

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  • Gram Negative Bacteria

    The purpose of the unknown experiment is to understand and identify a gram positive and a gram negative. Bacteria can be very helpful in clinical uses and many pharmaceutical drugs are based on the organism. Knowing how a bacterium works and how it is structured can be crucial to determine how it affects each individual. Several biochemical tests were performing to separate and determine the identities of the microorganisms. Broth tube number 31 containing unknown microorganisms. One of the microorganisms is gram positive which can be separate from the gram negative using the four-way streak isolation from the lab manual. The purpose of the streak isolation is to obtain single colonies on a Columbia CNA agar plate. C-CNA agar is a type of…

    Words: 1051 - Pages: 5
  • Gram Negative Bacteria Lab Report

    The objective of this lab was to isolate and identify an unknown Gram positive and Gram negative bacteria through the use of various microbiological techniques. The identification of the genus and species for the unknown culture should be obtained based on the characteristics for Gram positive and Gram negative bacteria. Bacteria are prokaryotic microorganisms that lack a nucleus and therefore all its genetic information is stored in the cytoplasm of the cell. The bacterial cell envelope…

    Words: 1706 - Pages: 7
  • Gram-Negative Bacteria Lab Report

    Introduction: Bacteria create an enormous domain of prokaryote microorganisms that are diverse and abundant in most habitats on Earth. In fact, bacterial cells drastically outnumber somatic cells just on the external part of the human body compared to somatic cells within the whole body of a single individual. Bacteria are found just about anywhere on earth and are usually alongside other microorganisms including: mold spores or yeast cells, creating some difficulty when trying to distinguish…

    Words: 2323 - Pages: 10
  • Unknown Sample # 12: Serratia Marcescus

    bacterium was also plated on a MAC plate, which is both selective for gram-negative bacteria and differential as well. On the NA plate, bright red colonies were present; on the MAC plate there was bacterial growth as well, but no color change was observed. This lack of color change on the MAC plate indicated that the bacteria did not ferment lactose. A Gram stain was then performed to confirm that bacteria #12 was indeed gram-negative and also showed that it was rod shaped. Following the…

    Words: 1060 - Pages: 5
  • Metal Resistance Essay

    In microorganisms metal resistance character is regulated by genes which are organized in operons. Commonly, the heavy metal resistance genes are found on plasmid carried by metal resistant bacteria. In the presence of specific metals in the vicinity of bacterial niche the heavy metal resistance genes are expressed and induced. The regulation of expression of metal resistant gene is specific for each heavy metal and is dependent upon metal species concentration. The promoter and regulator genes…

    Words: 1630 - Pages: 7
  • The Difference Between Antibiotic Creams And Ointments

    Antibiotic creams, also known as topical ointments are preparations designed to fight bacteria on the skin. The main difference between antibiotic creams and ointments is the oil to water ratio. For instance, ointments contain an average of 80% oil and 20% water while creams contain a relatively lower oil to water ratio. This is why ointments tend to feel greasier and stickier than creams. We have chosen three antibiotic creams and three antibiotic ointments in order to find out which…

    Words: 973 - Pages: 4
  • Bacterial Cell Wall Lab Report

    Structure of the Bacterial Cell Wall Bacterial cells differ from mammalian cells due to highly developed cell walls outside the cytoplasmic membranes that provide structural integrity and shape to the cell. Bacteria live in dilute aqueous environments, which causes an intracellular pressure equivalent of 10-25 atm. Without the structural support of the cell wall, the cell is susceptible to lysis and osmotic rupture due to osmotic rupture due to turgor pressure. Figure 1: Comparison between…

    Words: 990 - Pages: 4
  • Proibacterium Acne Research Paper

    Propionibacterium acnes (P. acnes) is a bacteria that grows deep inside of pores, which is relatively slow-growing, typically aerotolerant anaerobic and gram positive type, It feeds on the sebum that is made by the sebaceous glands which surround the base of hair shaft. One of the most prominent properties of these bacterias is that it’s partially…

    Words: 1314 - Pages: 6
  • KOH String Test Lab Report

    Introduction: Bacteria are very diverse and are part of the prokaryotic domain. Some bacteria can be harmful, but others can also be beneficial in many ways. There are bacteria everywhere on Earth; places that you would think would have bacteria, like your gastrointestinal tract or our skin (Wenner, 2007). Although bacteria are small in size and are a simple cell organism, it is essential to life. There are different ways in how to distinguish and classify bacteria. One way is you can look…

    Words: 1945 - Pages: 8
  • Bacteria Structural Morphology

    Identification of bacteria can be a difficult process due to the fact that individual bacterial cells can possess similar structural morphology to other types of bacteria. As we have demonstrated in previous lab experiments there are key biological and chemical processes that are characteristic to different types of bacteria. Using various biochemical tests we can evaluate and detect these different processes to aid in our identification of unknown bacterial samples. The implications of these…

    Words: 1262 - Pages: 6
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