The Effect of Common Bactericidal Agents on Staphylococcus Epidermidis Introduction Staphylococcus epidermidis is a facultative anaerobic bacterium. It is part of the normal human flora and is found on the skin. Colonies of these bacteria can produce a protective slime called a hydrophobic biofilm. Staphylococcus epidermidis is usually not pathogenic unless it enters the human body. One of the most common places for infections are hospitals where people often have weakened immune systems‚ open
Premium Bacteria Chlorine Oxygen
sample of certain bacteria became contaminated by some mold and that all the bacteria cells closest to the mold were dying. Our immune systems can destroy many harmful bacteria‚ as we have white blood cells that attack them before they multiply. There are instances when a bacterial infection is too much for our bodies and this is when we use antibiotics. Bacteria constantly build up their cell walls. Penicillin works by damaging and penetrating those cell walls. Though bacteria can build a resistance
Premium Bacteria Penicillin
Study of Bacterial Growth and Resistance Level to Certain Antibiotics INTRODUCTION Escherichia coli—better known as E. coli—is a gram negative‚ rod shaped bacteria. It is relatively harmless‚ but can occasionally cause food poisoning. It can also provide Vitamin K2. It prevents the establishment of pathogenic bacteria‚ and is associated with or found in the intestinal organ. The antibiotic that E. coli is resistant to is Penicillin. Bacillus subtilis—better known as B. subtilis—is known as
Premium Bacteria Bacillus Antibiotic resistance
particular order. Name this Procedure Identify the two types of bacteria present by shape and gram stain. In a gram stain what is the primary stain? The mordant? The counterstain? How does this differ from a simple stain? Identify the shape and gram stain of the bacteria present in this gram stain. Identify the shape and gram stain of the bacteria pictured. Think on this one! Name the gram stain and shape of the bacteria pictured. Name the genus of the organism pictured. Note the size
Premium Staining Gram staining Bacteria
Citrate Test: Some bacteria can use citrate as a source of carbon. To test if the unknown bacteria uses citrate as a source of carbon‚ Simmon’s citrate agar was used as the medium on which the bacteria was grown. The Simmon’s citrate agar consists of sodium citrate as the source of carbon‚ ammonium dihydrogen phosphate as the source of nitrogen along with pH indicator such as bromothymol blue. Procedure: The Citratase activity was detected by inoculating the unknown bacteria on the slant surface
Premium Escherichia coli Escherichia coli PH indicator
fundamental differential staining techniques used in the study of bacteriology is gram staining. There are two main types of bacteria‚ gram negative and gram-positive. The purpose of this experiment was to perform a variety of tests to identify the bacteria contained in the unknown sample labeled number 15. The following are the tests that were used to identify the two different bacteria. The SIM test‚ which tests for sulfur reduction‚ indole production‚ and motility‚ MRVP which is a test used to distinguish
Premium Bacteria Microbiology Gram staining
university‚ I cultivate bacteria and observe what harms or benefits the different species are. For years‚ I focused my research on society’s effect on bacteria’s natural development. The issue I bring to you today demands a shift in perception of bacteria and antibiotics‚ a paradigm shift. We need to change the way we focus our attention on these topics. These points will allow us to develop an idea of how to take a stand sociologically in the war against resistant bacteria. Society idolizes antibacterial
Premium Bacteria Antibiotic resistance Penicillin
Bonnie Bassler claims that bacteria although simple have complex systems that they use to communicate with each other to coordinate. This is crucial to humans because Dr. Bassler considers humans to be 90-99% bacterial. Dr. Bassler states we have about one trillion human cells but we have about 10 trillion bacterial cells that either live in or on humans. The number of bacterial genes in those cells outnumber humans by 100 times since humans only have 30‚000 genes. These bacteria share a mutualistic relationship
Premium Bacteria Immune system Microbiology
Black Plague in the Middle Ages wiped out significant human populations. In the present‚ research in medicine has brought forth antibiotics – a way of stopping harmful bacteria from infecting a person. Growing concern is centered on the fear that the overuse of antibiotics will create different types of “super bacteria”‚ or bacteria resistant to multiple kinds of antibiotics. This fear is legitimate – mankind could be fast-forwarding the evolution of harmful viruses or bacterium‚ leading
Premium Bacteria Antibiotic resistance Penicillin
B. Cereus about Your Health Emily Parkhurst 02/28/2013 Michael Wu “I have complied with all rules if academic integrity while preparing this report.” Results: Bacteria Survival Rate after being emerged in Boiling Water Amount of Bacteria Surviving Time E. Coli S. Marcescens B. Cereus 0 Seconds ++++ ++++ ++++ 10 Seconds +++ +++ +++ 30 Seconds ++ 45 Seconds 60 Seconds + 300 Seconds + Table 1: ++++ = the highest amount surviving‚ + = the least amount
Premium Escherichia coli Bacteria Antibiotic resistance