Gram-positive bacteria

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    the 96-well micro-titer plates, the growth control wells contained MH broth medium with tested bacterial concentrations and sterility control wells contained only MH broth medium as shown in figure 2. The plates were then covered to ensure that the bacteria were not dehydrated. Then the plates were incubated at 37°C for 18 to 20 hours. The lowest concentration of each antibacterial agent that inhibited the bacterial growth was considered as the MIC (CLSI, 2006). After the MIC determination,…

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    K12 Escherichia Coli

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    prokaryotic bacteria E. coli. In topic one IB requires that we learn about Eubacteria, traditional bacteria that are typically pathogenic, E. coli fall into this category. We also had to learn about Florey and Chain experiments, which is where I learned about zones of inhibition. The problem interests me because is important that one knows which cleaning product to use in one household to get rid of the most bacteria. The idea is that if one test the most affective cleaning product on bacteria…

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    Foeniculum Vulgare Essay

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    In this article, foeniculum vulgare is assayed in vitro for antibacterial activity. They used 27 phytopathogenic bacterial species and 2 myropathogenic bacterial species. A significant antibacterial activity is determined by agar diffusion method and reported that foeniculum vulgare essential oil is useful for natural bacterial to control of bacterial disease of plant and seed mainly in organic agriculture. In day today life people used to smoking, poor diet maintenance…

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    What Is Anthrax?

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    infectious disease that normally affects herbivores (livestock) and unfortunately may also spread to humans through inhalation, ingestion or any sort of skin contact of the bacterium, Bacillus anthracis. Bacillus anthracis (B. anthracis) is a gram positive spore forming bacterium that invades the human body and leads to various symptoms of Anthrax, depending on how virulent it has become. These symptoms include; swollen neck glands, bloody diarrhoea, vomiting blood, extreme tiredness and…

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    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…

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    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…

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    infections it can lead to under specific conditions. Introduction 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…

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    Metal Resistance Essay

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    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…

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    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 gram-positive bacterial cell walls and gram-negative bacterial cell walls. Structural differences in the bacterial cell walls cause bacteria to be subcategorized into gram-positive and gram-negative.…

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    Listeria monocytogenes is a gram-positive rod-shaped bacterium and facultative anaerobic that can grow under either anaerobic or aerobic conditions but do not form endospores. Among the six species of Listeria, only Listeria monocytogenes is the major human pathogen that causes disease in humans. It is a causative agent to cause listeriosis, a serious infection caused by ingesting the food contaminated with Listeria. The optimum temperature for growth is 30 to 37 degree Celsius, within this…

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