Escherichia coli Essays

  • Cyprinus Carbiotic Case Study

    1813 Words  | 8 Pages

    fruits of caesalpinia pulcherrima, aerial parts of Euphorbia hirta, flowers of Asystasia gangeticum were tested against Escherichia coli (enteropathogen), Proteus vulgaris, Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans, Aspergillus niger and Rizopous oligosporus. Ethanolic extracts of all plants exhibited significant antimicrobial activity against Escherichia coli, Proteus vulgaris, Pseudomonas aeruginosa and Staphylococcus aureus. Caesalpinia pulcherrima only exhibited significant

  • Esscherichia Coli Case Study

    1199 Words  | 5 Pages

    Abstract: Escherichia coli (E. coli) is currently one of the most predominant human food-borne pathogens. In the dairy industry, recently, attention has been drawn to the potential use of bacteriophages (phages) to control bacteria in dairy products. In this study, a cocktail of three Escherichia coli bacteriophages (EcoM-AG2, EcoM-AG3 and EcoM-AG10) was tested to evaluate its ability to control Escherichia coli O126:H7 in experimentally contaminated skim milk. In Tryptic Soy Broth (TSB), there was

  • Camel Milk Lab Report

    1100 Words  | 5 Pages

    long term preservation by preparing the glycerol freeze stocks. Therefore, for further investigation these isolated samples for their probiotic potential were checked on the basis of their antimicrobial activity against the bacterial strains, Escherichia coli, Staphylococcus epidermidis and Bacillus subtilis. 3.2 PROBIOTIC PROPERTIES 3.2.1 Antimicrobial Activity To study the antimicrobial activity of isolated colonies from camel milk. We were able to select 8 isolates out of 24 which have shown resistance

  • Serratia Case Study

    719 Words  | 3 Pages

    Serratia: Serratia’s a group of gram (-negative), facultative anaerobic, rod-shaped bacteria of the Enterobacteriaceae family. Serratia are most common and pathogenic of the species within the genus, S. marcescens, is often the sole infective agent and frequently causes health facility infections. S. marcescens is often found in showers, bathroom bowls, and around wetted tiles. The bacterium is associate timeserving, human infective agent, capitalizing on its ability to make integrated surface communities

  • E. Coli Case Study

    955 Words  | 4 Pages

    “STUDY OF VIRULENCE FACTORS AND ANTIBIOTIC SENSITIVITY PATTERN IN ESCHERICHIA COLI STRAINS ISOLATED FROM EXTRAINTESTINAL INFECTIONS” INTRODUCTION Escherichia coli (E. coli) is one of the most important members of the family Enterobacteriaceae and a commensal in the human intestinal tract. (1) As a commensal it contributes to the maintenance of health of a person. However, E.coli when enters into unnatural sites, can cause variety of conditions such as urinary tract infections, wound infections,

  • Coffee Lab Report

    1409 Words  | 6 Pages

    palm (Phoenix dactylifera) plants were purchased from local market in Duba province, west Saudi Arabia were assayed for the in vitro antibacterial activity against three human pathogenic bacteria viz Klebsiella pneumoniae, Psuedomonas sp, and Escherichia coli using hole plate diffusion method. The result revealed that some ethanolic and hot water extracts had shown antibacterial activities against the three bacterial strains under investigation. Key words: plant extracts, coffee, black cumin, date

  • Trp Operon Analysis

    964 Words  | 4 Pages

    trp and ara operon trp operon: The trp operon is a group of genes that are used, or transcribed, together that codes for the components for production of tryptophan. The trp operon is present in many bacteria, but was first characterized in Escherichia coli. The operon is regulated so that when tryptophan synthesis are not expressed. It was an important experimental system for learning about gene regulation, and is commonly used to teach gene regulation. Discovered in 1953 by Jacques Monod and

  • Mycobacterium Tuberculosis Case Study

    942 Words  | 4 Pages

    the five different formulations of both solid and liquid media to support the growth of Staphylococcus sp., Escherichia coli, Klebsiella sp., Salmonella sp., and fungi. All the formulations produced good growth of microbes similar to the conventional media. In the study of Ravathie Arulanantham, Sevvel Pathmanathan, Nirmala Ravimannan and Kularajany Niranjan, 2012, they culture Escherichia coli, Bacillus sp., Klebsiella sp., Staphylococcus sp. and Pseudomonas sp.as test microorganisms using edible

  • Pathogenic Bacteria In Fish

    1614 Words  | 7 Pages

    Contamination with pathogenic bacteria from the human/animal reservoir can occur when the landing place is unhygienic or when the fish are washed with contaminated water. Upon the processing of fish, its exposure to water is a critical part as pathogens may be present in the water used which can cause contamination and spoilage (Shoolongela & Schneider, 2012). Contamination of food can occur because of problems in food production, preparation, storage or cooking. The aquatic environment and soft

  • Food Spoilage Essay

    1141 Words  | 5 Pages

    ABSTRACT Food spoilage is defined as the process of change in physical and chemical properties of the food. The purpose of this study is to be able to detect spoiled food samples using different human senses. According to the book Practical Cookery Level 3, food spoilage can be detected by our senses such as smell, touch, taste and sight. In this experiment, only the texture, appearance and smell were used and exclude tasting the samples to avoid any possible harmful effect to the experimenter

  • Food Poisoning Case Study

    779 Words  | 4 Pages

    others. E. coli E. coli are known as Escherichia

  • Pansitan Essay

    1401 Words  | 6 Pages

    terms of diameters of growth inhibition of the test organism Escherichia coli? 2. What is the antibacterial property of Pansit-pansitan (Peperomia pellucida) extract in terms of diameters of growth inhibition of the test organism Staphylococcus aureus? Scope and Delimitation This study mainly focused on the antibacterial property of Peperomia pellucida in terms of the total zone of inhibition of the two test organisms namelyEscherichia coli and Staphylococcus. Aureus pansit-pansitan (Peperomia pellucida)

  • Dilution Series Case Study

    739 Words  | 3 Pages

    that some of the colonies have turned pink in colour. What information does this tell you about the bacteria in the sample, and why did the colony change colour? [2 marks] This tells me that the bacteria in the sample contains coliforms such as Escherichia coli (E.coli). The colonies changed colour as the enzymes produced by the bacterial cells reacted with the red galactosidase in the agar medium, this reaction causes the colonies to turn pink making them easily

  • Kerato-Conjunctivitis Case Study

    1668 Words  | 7 Pages

    ABSTRACT Bacterial conjunctivitis occurs in persons of all races, although differences in frequencies may be reflected by geographical variations of pathogen prevalence.The study was therefore taken up to detect the prevalence of bacterial and fungal pathogens causing occular infections and to study their antibiotic resistant profiles. A total of 44 kerato-conjunctivitis samples were collected, out of which, 31/44 (73%) were fungal isolates . The prevalence of fungal isolates was as follows- 7

  • Bifidobacteria Case Study

    1353 Words  | 6 Pages

    isolated from infant feces to inhibit enterohemorrhagic Escherichia coli serotype O157:H7 in-vitro to bifidobacterial reference strains collected from American Type Culture Collection (ATCC). Bifidobacteria reduced its adhesion to human enterocyte-like Caco-2 cells. He used the carbohydrate fermentation patterns to carry out agar spot technique, resistance to lysozyme, acid, bile and hydrogen peroxide as well as their ability to inhibit E. coli O157:H7. Five Bifidobacterium isolates were identified

  • Practicum Lab Report

    1757 Words  | 8 Pages

    Introduction The practicum has been developed in RIKEN Centre of Developmental Biology in Kobe, in the laboratory of Axial Pattern Dynamics under the supervision of Inomata-sensei and Matsukawa-san. In the laboratory they try to artificially regulate the gradient shape, they can control morphogen-dependent pattern formation. In general, the shape of a gradient is defined by three factors; synthesis, diffusion, and degradation of morphogen. So, they attempt to spatiotemporally regulate the gradient

  • Role Of Microorganisms In Food

    1182 Words  | 5 Pages

    Topic Food Microbiology Food microbiology studies the role of microorganisms in foods. It includes aspects of microbial ecology in food as well as the use of microorganisms for production of ingredients and foods. Moreover, some microorganisms represent a major challenge for public health due to their ability to cause diseases. Food preservation aims at inactivating and controlling the growth of spoilage and pathogenic microorganisms, insuring shelf-stable and healthy foods. Thus, continuous

  • Personal Statement Essay: My Role In Science Olympiad

    787 Words  | 4 Pages

    The putrid smell of Escherichia coli is one that is immediately identifiable to the few lucky individuals who recognize its scent. It is also an aroma with which I became intimately sensitive to as I shuttled petri dishes of the bacterium in and out of an incubator. While my classmates shied away from the task of handling the pungent bacteria used in our recombinant DNA experiments, I took to the task eagerly, anything that would take me one step closer to my goal of researching. I had the opportunity

  • Bacteria And Bacteria Pros And Cons

    1872 Words  | 8 Pages

    Bacteria are prokaryotic, which means that they do not have a nuclear membrane around the genetic material. With the exception of Ribosomes, bacteria do not have cell bodies. Bacteria are very quick to reproduce; for example, the most studied one E. coli can in favorable circumstances divide every 20 minutes. Thanks to its rapid ability to divide, bacteria are very quick to adapt to changing living conditions. Although the structure is simple, their metabolites may be highly developed and specialized

  • Bacteria Literature Review

    3386 Words  | 14 Pages

    3 pieces disc will be placed onto each plate that inoculated with E. coli, and last 3 pieces will be placed on plate inoculated with S. typhimurium. Positive control antibiotic, which is, will be placed in all inoculated plates. Then all plates are will be inoculated at 37oC for 24 hours in the incubator. After 24 hours