against Streptococcus pneumoniae. Two | |Frederick Griffith |strains, smooth edge (with polysaccharide capsule) and rough (without). S bacteria killed mice, R did not. Dead S | | |bacteria did not. Heat killed S. with the capsule did not. R bacteria mixed with heat-killed S bacteria killed mice. | |Vaccine |Material produced from weakened or killed microorganisms to stimulate an immune response and thereby
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What causes Chlamydial infection? What is Trachoma? What causes Malaria? What cause EHEC? (Enterohemorrhagic E.Coli ) What are the symptoms of EHEC? What causes BOTULISM? Where Does Clostridium Boltulinum grows? What kind of Bacteria causes Gonorrhea? Where does Neisseria Gonorrhea grow? What is Meningitis? What causes Meningitis? Name the diseases or infections caused by Streptococcus Species? What bacterial species cause necrotizing fasciitis? What are the consequences
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in which viruses are like organisms is that they are able to multiply. • Although viruses can multiply, they do so differently than organisms. Viruses can multiply only when they are inside a living cell. • The organism that a virus enters and multiplies inside is called a host. • A host is an organism that provides a source of energy for a virus or another organism. • A virus acts like a parasite, an organism that lives on or in a host and causes it harm. • Almost all viruses destroy the
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1. Viruses are both living and non-living as they share characteristics of both. A major non-living characteristic is that viruses do not have cells and cannot reproduce on its own. However, the virus can reproduce if it has a living host, which gives viruses their living characteristics. 2. Viruses cannot be grown agar as bacteria are because they cannot metabolize on their own. They need at least one host cell where it could input its DNA and infect it. After that, both those viruses would
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Biodiversity - variety & # of life forms on earth Species - breed that can interbreed naturally Morphological Species Concept: species r organisms that look anatomically similar Recognition Species Concept: species r organisms that can recognize each other as potential mates Biological Species Concept: species r individuals in a population that can breed under natural conditions and produce fertile offspring Hybridization- crossbreeding between species (rare) (ex, liger, mule) Types of
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Virus and Bacteria Virus - A virus is a capsule of protein that contains genetic material. A virus cannot reproduce on its own; it must infect a living cell to grow. Bacteria - Bacteria are one-celled organisms that live on their own. They can multiply and reproduce by subdivision Bacteria and viruses cause many of the diseases we are familiar with and may sound synonymous; they are greatly different from each other. [pic] o They differ greatly in size. The biggest viruses are only as
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from preexisting cells (“life begets life”). Life begets life is a refutation of the once popular idea of spontaneous generation, a doctrine that proposed life could arise from non-living components (which was disproved in the late 1800s). Viruses and prions are not composed of cells; they are acellular or subcellular infectious agents. Neither of these two agents is considered to be alive by most biologists. Metabolic Diversity Living things possess several attributes commonly
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the mass-production of penicillin, new bacteria arose that could resist the antibiotic, thus posing a renewed threat to the world’s population. Ever since the establishment of antibiotics, new “superbugs” have appeared that for years have challenged scientists to keep up with specialized medications to defeat and prevent these intrusive foes. Although most scientists have been effective in their research, newer, and stronger strains of super bacteria continue to appear. Many experts have concluded
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The causes of additional needs Cystic fibrosis Cystic fibrosis is a genetic condition which is caused by the faulty CFTR gene which is on chromosome 7. This faulty gene blocks the normal workings of a protein which then allows too much salt and not enough water into the cells. This then builds up thick, sticky mucus in the tubes and passageways in the body which cause blockages to occur which then damage the lungs, digestive system and other organs. This then results in inflammation and swelling
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You study the causes of food-borne diseases and kitchen injuries, and you will learn ways of preventing them. Prevention of course, is the most important thing to learn. It is not as important to be able to recite the names of disease-causing bacteria as it is to be able to prevent their growth in food. Sanitation refers to the maintenance of healthy and hygienic conditions that is free from disease-causing organisms The Prevention of Food-Borne illness Preventing food-borne illness- is one
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