Enteric Bacteria
... produces a toxin in the small intestines do not invade cells but reside on the surface of cells of the small intestines • EPECS do not produce toxins changes the microvilli of the small intestines ...
... produces a toxin in the small intestines do not invade cells but reside on the surface of cells of the small intestines • EPECS do not produce toxins changes the microvilli of the small intestines ...
I. A bacterial population increases from 100 to I00,000,000 in 10
... counts were pertonned on MacConkey, but some of the colonies were pink and some were off-white. This result suggests that a. in the original test tube there was a mixture of two gram-negative bacteria, one lactose-positive and the other laclose-negative. b. A mixture of gram-positive and gram-negati ...
... counts were pertonned on MacConkey, but some of the colonies were pink and some were off-white. This result suggests that a. in the original test tube there was a mixture of two gram-negative bacteria, one lactose-positive and the other laclose-negative. b. A mixture of gram-positive and gram-negati ...
Π-True/False Questions
... 11) Which of the following does not belong with the others? A) Enterobacteriales B) Lactobacillales C) Legionellales D) Pasteurellales D) Vibrionales 12) Which of the following is an intracellular parasite? A) Rickettsia B) Mycobacterium C) Bacillus D) Staphylococcus E) Streptococcus 13) Cyanobacte ...
... 11) Which of the following does not belong with the others? A) Enterobacteriales B) Lactobacillales C) Legionellales D) Pasteurellales D) Vibrionales 12) Which of the following is an intracellular parasite? A) Rickettsia B) Mycobacterium C) Bacillus D) Staphylococcus E) Streptococcus 13) Cyanobacte ...
Sterilization & Disinfection
... 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfectants ...
... 4. List several methods used to inhibit the growth of microorganisms 5. Identify several factors that can influence the effectiveness of disinfectants ...
Survey of Microbes Part I: Important prokaryotes
... leading cause of death in the world from a single infectious disease! affects 1.7 billion people/year which is equal to one-third of the entire world population! ...
... leading cause of death in the world from a single infectious disease! affects 1.7 billion people/year which is equal to one-third of the entire world population! ...
MICROBES Microbes - 2 basic types 1. Eukaryotes
... - if used on a none living surface, microbe killing chemicals are called disinfectants. - if used on body surfaces called antiseptics - disinfectants and antiseptics such as alcohol, chlorine and iodine can attack the microbe by destroying its cell membrane, DNA, and/or proteins. - common household ...
... - if used on a none living surface, microbe killing chemicals are called disinfectants. - if used on body surfaces called antiseptics - disinfectants and antiseptics such as alcohol, chlorine and iodine can attack the microbe by destroying its cell membrane, DNA, and/or proteins. - common household ...
BioHnrs TEST TOPICS: Intro to Cells (4.1
... 1. Describe the structure and function of a virus. 2. Explain how viruses were discovered and the hypotheses regarding their evolution. 3. Explain how viruses can differ and identify what they all have in common. 4. Describe how the human immune system functions to prevent repeat viral infections. 5 ...
... 1. Describe the structure and function of a virus. 2. Explain how viruses were discovered and the hypotheses regarding their evolution. 3. Explain how viruses can differ and identify what they all have in common. 4. Describe how the human immune system functions to prevent repeat viral infections. 5 ...
Micro 280 Introduction
... • Acellular • Consist of DNA or RNA core • Core is surrounded by a protein coat • Coat may be enclosed in a lipid envelope • Viruses are replicated only when they are in a living host cell: Obligate intracellular parasite • Inert outside of host ...
... • Acellular • Consist of DNA or RNA core • Core is surrounded by a protein coat • Coat may be enclosed in a lipid envelope • Viruses are replicated only when they are in a living host cell: Obligate intracellular parasite • Inert outside of host ...
Helpful Bacteria Reading
... etc., are some of the most predominant species. Benefit: Lactobacilli are known for their ability to utilize lactose and produce lactic acid, as a metabolic byproduct. This ability to ferment lactose makes lactobacilli an important ingredient for preparing fermented foods. It is also an important pa ...
... etc., are some of the most predominant species. Benefit: Lactobacilli are known for their ability to utilize lactose and produce lactic acid, as a metabolic byproduct. This ability to ferment lactose makes lactobacilli an important ingredient for preparing fermented foods. It is also an important pa ...
basic concepts of micro
... • All organisms are named using the binomial system (binomial=“two names”) naming system. • Carolus Linnaeus was credited with the development of the binomial naming system. • The first name is the Genus to which the organism belongs. • Second name is the Species to which the organism belongs. • Gen ...
... • All organisms are named using the binomial system (binomial=“two names”) naming system. • Carolus Linnaeus was credited with the development of the binomial naming system. • The first name is the Genus to which the organism belongs. • Second name is the Species to which the organism belongs. • Gen ...
File
... Have thick walls with less peptidoglycan so are more resistant to antibiotics especially Penicillin. Appear red or pink in Gram stain. Penicillin, and other antibiotics, inhibit linkages between peptidoglycan molecules ...
... Have thick walls with less peptidoglycan so are more resistant to antibiotics especially Penicillin. Appear red or pink in Gram stain. Penicillin, and other antibiotics, inhibit linkages between peptidoglycan molecules ...
Virulence factor Bacterial
... pyogenes (causative agent of scarlet fever and many other conditions), are able to break down the host's immunoglobulins using proteases. Some bacteria, such as Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa, produce a variety of enzymes which cause damage to host tissues. ...
... pyogenes (causative agent of scarlet fever and many other conditions), are able to break down the host's immunoglobulins using proteases. Some bacteria, such as Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa, produce a variety of enzymes which cause damage to host tissues. ...
Virus or Bacteria... which needs the iron?
... anemia can result. Bacteria: Every surface of the human body is host to some type of bacteria. Mostly these bacteria are friendly; they are called normal flora. Normal body flora is part of our defense system that keeps harmful bacteria under control. These friendly bacteria assist the immune system ...
... anemia can result. Bacteria: Every surface of the human body is host to some type of bacteria. Mostly these bacteria are friendly; they are called normal flora. Normal body flora is part of our defense system that keeps harmful bacteria under control. These friendly bacteria assist the immune system ...
Heat, salt, pressure, acidity - how `extremophile` bacteria are yielding
... for use in industrial processes, thanks to their ability to withstand high temperatures, high pressure and high salt environments. Scientists are screening the deep ocean, sea floor and hydrothermal vents for species of bacteria – and primitive single-celled life forms known as archaea – that could ...
... for use in industrial processes, thanks to their ability to withstand high temperatures, high pressure and high salt environments. Scientists are screening the deep ocean, sea floor and hydrothermal vents for species of bacteria – and primitive single-celled life forms known as archaea – that could ...
Cell Specialization
... • A milliliter of fresh water has about a million bacterial cells in it. ...
... • A milliliter of fresh water has about a million bacterial cells in it. ...
Studies on Sulphate reducing bacteria from Southeast coast of India
... A striking feature in mangroves ecosystem is a large anaerobic substratum enriched with anaerobic microorganisms predominantly sulphate reducing bacteria. However, research studies on the role of sulphate reducing bacteria in the functioning of mangrove ecosystem are only scanty. Therefore the prese ...
... A striking feature in mangroves ecosystem is a large anaerobic substratum enriched with anaerobic microorganisms predominantly sulphate reducing bacteria. However, research studies on the role of sulphate reducing bacteria in the functioning of mangrove ecosystem are only scanty. Therefore the prese ...
Chapter 14
... 2. Occur in almost any natural habitat 3. Some species may have many different strains D. Pathogenic or Harmless? • more than 90% either harmless or beneficial to humans II. Features of Kingdoms Bacteria and Archaea A. Cellular Detail and Reproduction of Bacteria 1. Prokaryotic • no membrane-bound o ...
... 2. Occur in almost any natural habitat 3. Some species may have many different strains D. Pathogenic or Harmless? • more than 90% either harmless or beneficial to humans II. Features of Kingdoms Bacteria and Archaea A. Cellular Detail and Reproduction of Bacteria 1. Prokaryotic • no membrane-bound o ...
Bacteria Note Guide
... Obligate aerobes: must use __________________________________ Obligate anaerobes: must live without _________________________ Facultative anaerobes: can survive with OR without ______________ ...
... Obligate aerobes: must use __________________________________ Obligate anaerobes: must live without _________________________ Facultative anaerobes: can survive with OR without ______________ ...
(e) 4.1 Nitrobacteriaceae – 4.2 Pseudomonads
... These are Gram-negative bacteria. Non-sporing non-acid fast rods, which may be pleomorphic or coccoid (Nitrobacter), some are slender rods (Nitrospina), cocci (Nitrococcus) or spiral to comma-shaped (Nitrosipra) They may be motile. They are characterised by their ability to use nitrite as the only e ...
... These are Gram-negative bacteria. Non-sporing non-acid fast rods, which may be pleomorphic or coccoid (Nitrobacter), some are slender rods (Nitrospina), cocci (Nitrococcus) or spiral to comma-shaped (Nitrosipra) They may be motile. They are characterised by their ability to use nitrite as the only e ...
bacteria - SchoolNova
... • A milliliter of fresh water has about a million bacterial cells in it. ...
... • A milliliter of fresh water has about a million bacterial cells in it. ...
PROKARTOTES
... PROKARTOTES Prokaryotes thrive almost everywhere, including places too acidic, salty, cold, or hot for most other organisms Most prokaryotes are microscopic, but what they lack in size they make up for in numbers. There are more in a handful of fertile soil than the number of people who have ever li ...
... PROKARTOTES Prokaryotes thrive almost everywhere, including places too acidic, salty, cold, or hot for most other organisms Most prokaryotes are microscopic, but what they lack in size they make up for in numbers. There are more in a handful of fertile soil than the number of people who have ever li ...
Bacteria
... • Escherischia coli bacteria in your intestines help you digest; they also make vitamin K and vitamin B12. • Bacteria living inside the roots of plants, such as alfalfa, take up nitrogen gas from the air and convert it into a form the plant can use (nitrates) • A few bacteria produce antibiotic ...
... • Escherischia coli bacteria in your intestines help you digest; they also make vitamin K and vitamin B12. • Bacteria living inside the roots of plants, such as alfalfa, take up nitrogen gas from the air and convert it into a form the plant can use (nitrates) • A few bacteria produce antibiotic ...
CH. 17 NOTES BIOLOGY
... Endotoxins: made of lipids and carbs on outer membrane of Gramnegative bacteria like E. coli. These toxins produced only when cell dies causing fever, body aches, and weakness can damage blood ...
... Endotoxins: made of lipids and carbs on outer membrane of Gramnegative bacteria like E. coli. These toxins produced only when cell dies causing fever, body aches, and weakness can damage blood ...
spots - GLLM Moodle 2
... • Viral – most common, hardly ever life threatening. Spread by respiratory tract, poor hygiene, can be found in polluted water • Bacterial –quite rare but serious ,needs urgent treatment. • About 2,500 – 3,000 reported cases each year • Meningococcal – A, B, & C (B most common) • Pneumococcal • Hib ...
... • Viral – most common, hardly ever life threatening. Spread by respiratory tract, poor hygiene, can be found in polluted water • Bacterial –quite rare but serious ,needs urgent treatment. • About 2,500 – 3,000 reported cases each year • Meningococcal – A, B, & C (B most common) • Pneumococcal • Hib ...
Bacteria
Bacteria (/bækˈtɪəriə/; singular: bacterium) constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep portions of Earth's crust. Bacteria also live in symbiotic and parasitic relationships with plants and animals. They are also known to have flourished in manned spacecraft.There are typically 40 million bacterial cells in a gram of soil and a million bacterial cells in a millilitre of fresh water. There are approximately 5×1030 bacteria on Earth, forming a biomass which exceeds that of all plants and animals. Bacteria are vital in recycling nutrients, with many of the stages in nutrient cycles dependent on these organisms, such as the fixation of nitrogen from the atmosphere and putrefaction. In the biological communities surrounding hydrothermal vents and cold seeps, bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. On 17 March 2013, researchers reported data that suggested bacterial life forms thrive in the Mariana Trench, which with a depth of up to 11 kilometres is the deepest part of the Earth's oceans. Other researchers reported related studies that microbes thrive inside rocks up to 580 metres below the sea floor under 2.6 kilometres of ocean off the coast of the northwestern United States. According to one of the researchers, ""You can find microbes everywhere — they're extremely adaptable to conditions, and survive wherever they are.""Most bacteria have not been characterized, and only about half of the phyla of bacteria have species that can be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.There are approximately ten times as many bacterial cells in the human flora as there are human cells in the body, with the largest number of the human flora being in the gut flora, and a large number on the skin. The vast majority of the bacteria in the body are rendered harmless by the protective effects of the immune system, and some are beneficial. However, several species of bacteria are pathogenic and cause infectious diseases, including cholera, syphilis, anthrax, leprosy, and bubonic plague. The most common fatal bacterial diseases are respiratory infections, with tuberculosis alone killing about 2 million people per year, mostly in sub-Saharan Africa. In developed countries, antibiotics are used to treat bacterial infections and are also used in farming, making antibiotic resistance a growing problem. In industry, bacteria are important in sewage treatment and the breakdown of oil spills, the production of cheese and yogurt through fermentation, and the recovery of gold, palladium, copper and other metals in the mining sector, as well as in biotechnology, and the manufacture of antibiotics and other chemicals.Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.