Coliform bacteria Essays

The presence of bacteria and pathogenic organisms is a concern when considering the safety of drinking water. Pathogenic organisms can cause intestinal infections, dysentery, hepatitis, typhoid fever, cholera, and other illnesses. Sources of Bacteria in Drinking Water: The Need for Water Testing Human and animal wastes are a primary source of bacteria in water. These sources of bacterial contamination include runoff from feedlots, pastures, dog runs, and other land areas where animal wastes are deposited

human health and should be tested for fecal coliforms to maintain safety for the human population. Lake Byron, one of the water samples used in this experiment, will contain the most fecal coliforms because the surface of the water temperature is constantly rising to be ideal for growth of bacteria. The amount of positive Durham lactose broth tubes helped us to identify the MPN/100 mL of fecal coliforms. Inoculating an EMB plate with a positive coliform helped us suspect the possibility of E. Coli

I. TITLE: Fecal Coliform Testing ; M. Zinkievich , L. Moore ; APES ; Wends. Oct 21 2015 II. INTRODUCTION: Purpose: What is the amount of fecal coliform in my sample - from Fall Creek Reservoir? Is my water potable, safe for swimming and safe for incidental contact? Background: Fecal Coliform is a bacteria that grows in the intestinal tract, and is expelled during defecation. This means that where it is found has a source of raw sewage near it, being a leak in a septic system, or animal droppings

When given an unknown bacteria there are a multitude of steps one must go through to be able to correctly identify what bacteria was given. It is important to correctly identify the bacteria because some bacteria are more harmful than others. The gram stain is the first test that should be performed because it helps narrow down the possibilities by telling one whether the bacteria is gram positive or gram negative. After this test is performed, one shall place bacteria on/in Mannitol Salt agar, MacConkey

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

necessary to use a dilution series when isolating bacteria from a biological sample using spread plating? [5 MARKS] It is vital to use a dilution series to reduce the concentration of the original biological sample so it is easier to count the number of isolated colonies which are present on the spread plate. The diluted samples will have a workable number of colonies on the spread plate which can then be used to calculate the number of bacteria which were present in the original undiluted sample

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

produces acid or not. MacConkey agar is an example of a differential media which will enable the organism to express a colour depending on whether it produces acid. This agar contains a pH indicator which can provide more information on the type of bacteria that is growing on the agar. Method A more detailed method is provided in the 280.201 Industrial Microbiology lab manual. However, the basic steps of carrying out this experiment are as follows: • Five agar plates are provided including: 1

Hunting nightmare bacteria Answer the following questions Case of Addy (the girl from Arizona ) 1- Based on the pediatrician observations what was Addy’s diagnosis at the Pediatric Hospital intensive care unit ? She had got infected by staff or positive bacteria called Methicillin-resistant Staphylococcus aureus (MRSA). MRSA is a community associated bacteria that infects kids when they are playing in playing ground and getting scabs on their knee.They spread through that wound and

The purpose of this lab report is to employ a myriad of skills, tools and, methods learned throughout this semester to perform the appropriate tests for the identification of the assigned unknown bacteria. Add more background information here!!! The most important tools and techniques used during this identification include aseptic technique, microscopic examination and, the use of selective and differential media. Aseptic technique is an important tool for microbiologists. It is imperative that

Hypothesis To achieve a negative results in food sample with the absence of Salmonella spp. 1.3 Introduction The genus Salmonella belong in the family of Enterobacteriaceae is a group of rod-shaped, Gram-negative, and facultative anaerobic bacteria, which grow with or without oxygen. It is also a non-spore forming and a motile or non-motile bacterium with exception of S.gallinarum and S.pullorum. The genus Salmonella consist of two species, S. enterica, and S. bongori. Salmonella enterica is

vegetative form or in form of spores. In fresh wound, bacteria have little time to multiply and there is practically no evidence of inflammatory tissue response, hence with few exceptions, bacteria are regarded as contaminants. But after a few hours, however, if sign of inflammation or other tissue response appear, then the bacteria must no longer be considered as contaminant but as infecting bacteria (Topley and Wilson, 1988).The commonest pyogenic bacteria often associated with infected wounds are Staphylococcus

Viruses are unique and completely different to all the other micro-organisms. They are not included in the Five Kingdom classification system. They are genetic entities classified as to exist between living and non-living states.They are the smallest type of microbe and sometimes described as an intracellular parasites. Viruses have simple structures that differ in size and shape. They do not have a nucleus, instead viruses have one or two strands of dna and rna to protect it. This coat is called

Following are the tests used for the identification of bacterial species based on the differences in the biochemical activities of different bacteria. Beta glucouronidase test is used for the identification of Escherichia coli. An enzyme is produced by E.coli which is beta D glucouronidase. Beta d glucouronidase in turn hydrolyzes beta d glucopyranosid uronic derivatives to aglycons and D glucuronic acid. Bile solubility test is used in laboratory for differentiation of alpha hemolytic Streptococci

In the laboratory, identification of an unknown bacterium is often necessary. In the lab, a random sample consisting of three different bacteria was selected. The sample contained one gram-positive, one gram-negative paracolon, and one gram-negative coliform. The purpose of the experiment is to identify each of the three species that the mixture contained. After receiving an unknown mixture, the sample was streaked for isolation onto TSA, blood agar, and MacConkey plates. Each plate serves as a first

There are seven characteristics which make organisms different from non living things. These characteristics include growth, reproduction, irritability, movement, nutrition, excretion and respiration. The starfish is considered to be alive because it portrays the seven characteristics of a living organism. A starfish is considered to be undefined. It is continuously growing and all cells preserve the aptitude to develop into whatever section is considered necessary. several variety of starfish encompass

The particular classifications of contamination and sullying are microbiological, eutrophication, compound, suspended solids, strong squanders, warm, radionuclides, and spills. Microbiological squander for the most part comprise of the waste , material discovered I therapeutic waste. Despite the fact that there are particular directions for discarding this waste material, the contamination comes to fruition when those guideline are not being permitted. ("Water: Laws and Executive Orders," 2010).

INTRODUCTION Silent Spring is a science book written by Rachel Carson an eminent nature author and published by Houghton Mifflin on September 27, 1962, touching the topics related to Ecology, Pesticides and Environmentalism. The book is a detailed discussion on the harmful effects of pesticides on the environment and the related health issues faced by the human beings on being exposed to this polluted environment. The author has supported her views with appropriate scientific evidences and researches

1. What is a disease vector? Discuss the roles and importance of disease vectors in the transmission of diseases. 25 pts. A disease vector is any agent that transmits and carries an infectious pathogen into another living organism. These vectors have immunity to the pathogen and thus allows for the successful transport of the pathogen. Not every vector is able to carry every pathogen and ecological restrains also limit the spread of the disease due to the inability of the vector to survive in different

To Spray or Not to Spray Crocodile Cleansers is a small company that in South-East, that market varies type of cleaning products for customer. The principal product is Ab-Stain, a fabric remover available in liquid form. Robert Whitney is the new product manager for Ab-Stain. Robert was offer the job after his old boss left the company. Before this, Robert worked as assistant manager for four year. With his new position Robert faces a serious problem. As we know, Ab-Stain is superior to national