simple organic compounds found in soil and water. Although fungi play an important‚ major role in the breakdown of dead organic matter in the environments where they grow as well as being a food source‚ it is vital to remember that some fungi are pathogenic and can cause disease in animals and humans. c. Protozoans – Protozoans are single celled‚ free-living microorganisms that feed on other organisms for their energy source. Protozoans come in many different shapes and sizes‚ living in a wide
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Transformation is the process in which a bacterial cell takes up extracellular DNA. This can be especially useful for bacteria in order to acquire certain traits such as: antibiotic resistance‚ synthesis of catabolites‚ or any other trait that would help improve its survival. However‚ not all bacterial cells are naturally competent (able to naturally take up extracellular DNA). There are several techniques that can make cells artificially competent‚ some of which will be discussed later. Bacterial
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Report Microbiology Introduction Bacteria can be found almost anywhere. For human life‚ some help us‚ some hurt us‚ and others are neutral. It is now known that good bacteria‚ or normal microflora‚ can reach 1014 microbial cells. This is far more than the 1013 cells that make up the human body (Tannock‚ 1995). The total number of bacteria on Earth is estimated to be around 4-6 x 1030 (Horner-Devine‚ 2004). It is important to know the extent of bacteria‚ how they live‚ and how they are transmitted
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Addressing: The Four Categories of Human Environmental Hazards Everest Online University EVS1001-26 Environmental Science Professor Deborah Builder September 6th‚ 2012 The Four Categories of Human Environmental Hazards There are many exposures to hazards in our environment today that brings along the risk of an injury‚ different types of diseases‚ and even in some cases death. These hazards are called human environmental hazards. There are four categories to human environmental hazards
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Bacteria are unicellular and ultra-microscopic organisms‚ yet they play an important role in nature. They are of tremendous importance to man. They play an important role in agriculture and medicine and are the basis of many industries. Some are beneficial to man directly or indirectly‚ others are very harmful as they cause various plant and animal diseases. Bacteria are considered as our friends and foes due to their beneficial and harmful activities. Their economic importance can be studied under
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Aureus Bacteria This paper will explain how the infectious organism staphylococcus aureus is transmitted through food. Discuss a real life outbreak of staphylococcus aureus in the United States. Also describe the clinical symptoms‚ the duration of the symptoms‚ and any treatments for the disease. The author will discuss the steps to be taken to prevent further outbreaks‚ including personal as well as environmental precautions and methods that can be taken. Staphylococcus aureus bacteria (staph)
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Background of the Study We all know that bacteria are everywhere. Bacteria are microscopic organisms whose single cells have neither a membrane-enclosed nucleus nor other membrane-enclosed organelles like mitochondria and chloroplasts. One example of bacteria is E .coli is a bacterium that is commonly found in the gut endotherms. E. coli and related bacteria constitute about 0.1% of gut flora‚ and fecal-oral transmission is the major route through which pathogenic strains of the bacterium cause disease
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following agar mediums: Blood Agar (pg 168)‚ EMB Agar (pg 170)‚ Mannitol Salt Agar (MSA)(pg 172) )‚ MacConkey Agar (pg 174)‚ and PEA Agar (pg 176) to answer the following: 1. What does the blood agar select for? Blood agar allows distinction among bacteria based on their ability to lyse red blood cells (hemolytic activity). 2. What color is the blood agar? Blood red color. 3. What are the 3 types of blood agar results and how can you recognize them? Beta hemolysis‚ which is the complete
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design. Microorganisms are very diverse and include all the bacteria and archaea and almost all the protozoa. They also include some members of the fungi‚ algae‚ and animals such as rotifers. Many macro animals and plants have juvenile stages which are also microorganisms. Some microbiologists also classify viruses as microorganisms‚ but others consider these as nonliving.[2][3] Most microorganisms are microscopic‚ but there are some bacteria such as Thiomargarita namibiensis[4] and some protozoa such
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Bacteria are often maligned as the causes of human and animal disease (like this one‚ Leptospira‚ which causes serious disease in livestock). However‚ certain bacteria‚ the actinomycetes‚ produce antibiotics such as streptomycin and nocardicin; others live symbiotically in the guts of animals (including humans) or elsewhere in their bodies‚ or on the roots of certain plants‚ converting nitrogen into a usable form. Bacteria put the tang in yogurt and the sour in sourdough bread; bacteria help to break
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