Gram-negative bacteria Essays

  • Gram-Negative Anaerobic Bacteria

    990 Words  | 4 Pages

    polymicrobial, typically dominated by obligatory anaerobic bacteria. The most commonly isolated microorganisms before root canal treatment include Gram-negative anaerobic rods, Gram-positive anaerobic cocci, Gram-positive anaerobic and facultative rods, Lactobacillus species and Gram-positive facultative Streptococcus species.83 The obligate anaerobes are rather easily eradicated during root canal treatment. In contrast, facultative bacteria such as non-mutans Streptococci, Enterococci, and Lactobacilli

  • Essay On Hand Hygiene

    802 Words  | 4 Pages

    of the patient, When you go out - even if the patient has not been touched. Hand washing not only affects patients who work crew health care, but also affects the people all over the world because not washing hands cause the spread of the germ and bacteria pelvic lot of

  • Psychotrophic Bacteria In Milk

    1090 Words  | 5 Pages

    Psychrotrophs and Milk Quality Introduction Psychrotrophic bacteria are bacteria that are capable of surviving in a cold environment which are not usually ideal bacterial conditions. They also provide an estimation of shelf life and are largely responsible for the spoilage of refrigerated foods. The most common psychrotrophic bacteria are in the genus Pseudomonas. The psychotrophic bacteria isolated from milk are Gram-positive or Gram-negative. Bacteria and other microorganisms may enter milk from an udder

  • Kinetic Report

    759 Words  | 4 Pages

    Gentamicin, which is a broad spectrum aminoglycoside antibiotic (Fig. 1), belongs to the class of medicinal compounds capable of inhibiting the growth of Gram-positive and Gram-negative bacteria [1]. Gentamicin is one of the most effective drugs used in the treatment of serious suppurative and septic processes, especially those that are caused by Gram-negative microorganisms. The advantages of gentamicin over other aminoglycosides (kanamycin, neomycin) are its activity towards Pseudomonas aeruginosa and

  • Bacteria And Bacteria Pros And Cons

    1872 Words  | 8 Pages

    know, bacteria is a very complex organism and the subject can be very broad. In this essay, the focus will be on bacteria and the bacterial cell structure. Different forms of bacteria, its pros and cons, the cell structure, diseases and resistance will be explained and listed. First bacteria and cell structure is explained, and then moving on to different bacterial forms and diseases, and how diseases can be prevented or even cured. Then finishing the essay will be the conclusion. Bacteria The

  • Delights Training Kitchen Case Study

    751 Words  | 4 Pages

    Pest can also carry food poisoning bacteria on them which is why pest control is important. Doors and windows should be kept closed as much as possible and fly screens should be used on the windows. Waste food or rubbish should not be kept lying around in the kitchen. 5. Kitchen area should

  • Essay About Coconut

    1675 Words  | 7 Pages

    Chapter 1 INTRODUCTION Aspidiotus Rigidus or more commonly known as “cocolisap” is a destructive pest that attacks the Coconut tree by eating the leaves, fruits, and flowers until only the trunk is left (1). During infestation, the “cocolisap” completely covers completely the underside of leaves and defoliate, resulting to the shriveling of nuts leading to premature nut fall and even kill their host plants (2). The Philippines is the second largest producer of coconut products and, in some areas

  • Classification Of Plant Family Essay

    982 Words  | 4 Pages

    The classification of plants is incredibly complex, and living things constantly defy the rules that scientists try to impose on them. However, it is important for the horticulturalist to have a sound understanding of plant taxonomy, especially as knowledge of which family a plant belongs to gives some indication of how a plant will look and perform in the garden and what growing conditions it needs in order to thrive. Plant families Plants which share basic characteristics regarding their flowers

  • Peperomia

    1401 Words  | 6 Pages

    normal flora of the gut, and can benefit their hosts by producing vitamin K2, or by preventing the establishment of pathogenic bacteria within the intestine. E. coli are not always confined to the intestine, and their ability to survive for brief period outside the body make them an ideal indicator organism to test environmental sample for fecal contamination. The bacteria can also be grown easily and its genetics are comparatively simple and easily – manipulated, making it one of the best- studied

  • Stenotrophomona-Maltophilia Research Paper

    1663 Words  | 7 Pages

    CHAPTER 1 : INTRODUCTION STENOTROPHOMONAS AND ITS EFFECT ON HUMAN BEINGS 1.1 Stenotrophomona-maltophilia is a gram negative, non-fermentive, aerobic bacteria which is usually found in aquatic environments and plant rhizospheres. It is motile due to the polar flagella and colonizes well in MacConkey agar, which is not a generally discovered pathogen among human beings. It is resistant to many drugs and it mainly affects the nosocomial region on individuals with low immunity. Though the organism

  • Nitrogen Fixing Bacteria Lab Report

    1448 Words  | 6 Pages

    fixing bacteria from rhizosphere Hypothesis: Rhizospheric Nitrogen fixing bacteria show optimal growth at PH: 6-7, Temperature: 30 °C and Salinity level: 0.005 – 0.010M NaCl INTRODUCTION: There is a huge bacterial diversity in rhizospheric soil. Gram-negative, non-sporulating baccilli which respond to root exudates are predominant in the rhizosphere (Pseudomonas, Agrobacterium). While Gram-positive bacilli, Cocci and aerobic spore forming bacteria like

  • The Importance Of Water In Long Island

    1411 Words  | 6 Pages

    Every organism in the universe requires water for its survival. Arguing out that water is good or bad is inconclusive. Water for human consumption is supposed to be subjected to quality tests so as to determine its safety for consumption and usage. A number of water sources around the globe suffer from some form of impurities. This makes it unsafe and unhealthy for individuals to use it. Challenges such as unsafe water, insufficient or the lack of quality healthy water has been an issue which has

  • Colistin Case Study

    2242 Words  | 9 Pages

    What is the mechanism of action of colistin? Colistin is an antibiotic that works best against Gram-negative bacteria. It works by binding to LPSs (lipopolysaccrides) and phospholipids in the outer cell membrane of the bacteria. This, in turn, disrupts the outer cell membrane by displacing cations and leaking the intracellular contents, combining it with outer cellular contents, causing the bacteria to be unable to differentiate the bacteria’s intra and outer cellular contents from one another.

  • Hydroquinone Study

    1068 Words  | 5 Pages

    The hydroquinone metabolite purified from B. methylotrophicus MHC10 was evaluated for its antibacterial activity against a panel of several Gram-positive and Gram-negative bacterial pathogens. The zone of inhibition was used to evaluate the antagonistic activity of the metabolite. The standard antibiotics Ampicillin and Gentamycin were used as the positive control. Both antibiotics showed high antagonistic activity against all test pathogens. But in the case of P. aeruginosa, the hydroquinone treatment

  • Shigella Synthesis Essay Sample

    1343 Words  | 6 Pages

    different species – Shigella boydii, Shigella dysenteriae, Shigella sonnei, and Shigella flexneri. Several serotypes occur for each species based on O - antigen variations (Jennison & Verma, 2004; Morona, et al., 1995). Members of the genus are gram-negative, highly infective facultative intracellular pathogens, recognized as etiological agents of bacillary dysentery (shigellosis) (Kotloff, et al., 1999; Sansonetti, 2001). Shigella ranks third among the most common causes of bacterial gastroenteritis

  • Latobacillus Spp Case Study

    1628 Words  | 7 Pages

    Abstract The antagonistic effect of Lactobacillus spp. against Vibrio harveyi and its probiotic effect on growth, digestibility and immune response for fresh water prawn, Macrobrachium rosenbergii were determined. Juvenile prawns (1.0±0.2g in weight, 0.45±0.02cm in length) were examined following feeding with Lactobacillus spp.-incorporated feed for 60 days. Lactobacillus spp. was isolated from prawn body. Larvae were fed twice per day with probiotic mixed feed for treatment group. As compared to

  • Choolera Toxin

    1259 Words  | 6 Pages

    4. The mechanism of action of cholera toxin The cholera toxin is an enterotoxin which is secreted by the gram-negative bacteria Vibrio cholerae. The toxin is an protein complex which is made up by six subunits, one A subunit and five B subunits. The A subunit is the enzymatic subunit and the B subunit is the binding subunit [9]. The cholera toxin is released from the bacteria and once in the intestinal lumen it adheres to the apical surface of the epithelial cell. The B subunit of the toxin binds

  • Camel Milk

    1100 Words  | 5 Pages

    Strains Morphology Catalase Motility Gram Staining Methyl Red Arginine Production Acetoin Production 01 Cocci - - + - + - 02 Cocci - - + - + - 07 Cocci - - + - + - 08 Cocci - - + -

  • NRC-04 Lab Report

    8201 Words  | 33 Pages

    different types of membrane, our team did experiments on NRC-04 with negatively charged bacterial surface membrane mimetic micelles sodium dodecyl sulphate(SDS), zwitterionic eukaryotic middle membrane mimetic micelles dodecylphosphocholine(DPC), gram-negative bacteria outer membrane mimetic micelles Lipopolysaccharide(LPS) and bacterial inner membrane mimetic micelles 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol(POPG). Fluorescence test shows that the C-terminus tryptophan residue of NRC-04 interacts

  • Biochemical Test Lab Report

    1371 Words  | 6 Pages

    activities of different bacteria. Bacterial physiology differs from one species to the other. These differences in carbohydrate metabolism, protein metabolism, fat metabolism, production of certain enzymes and ability to utilize a particular compound help them to be identified by the biochemical tests. Gram’s stain was originally devised by histologist Hans Christian Gram in 1884. Gram-positive bacteria stain purple, while Gram-negative bacteria stain pink when subjected to Gram staining. Approximately