Bacterial Smears Are Fixed before Staining to? Answer It is important to heat fix the bacterial smear before staining so as to‚ kill the bacteria‚ firmly adhere the smear on to the microscopic slide to prevent washing off during staining‚ and to allow the sample to readily take up the stain. Reference: www2.hendrix.edu What is the purpose of heat- fixing the smear? It helps the cells adhere to the slide so that they can be stained. The purpose of heat fixing is to kill the organisms without
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his time. He discovered Yersinia pestis‚ prepared serums against the plague in both humans and cattle‚ as well as studied cattle diseases such as tetanus‚ cholera‚ and small pox. Together Roux and Yersin were responsible for isolating the diphtheria toxin. The earliest description of diphtheria was noted by Hippocrates in the seventh century B.C. In Europe and the US‚ during 1857-1900 diphtheria was commonly a death sentence. The mortality rates for those who contracted diphtheria were 1 in 1‚000 per
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peptides. In the present study the antimicrobial peptide Microcin C7 was docked with the catalytic domain of Diphtheria toxin and further the simulational studies were performed to find the stability of the complex. The results were significant and hence it was predicted that further work can be done on antimicrobial peptide to develop it as an altenative drug against Diphtheria toxin. Keywords- I. INTRODUCTION In the last few decades drug resistant bacteria
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NECROTIZING FASCIITIS Necrotizing fasciitis is commonly known as ‚ flesh eating bacteria (infection). Is a disease condition of rapidly spreading infection‚ usually located in fascial planes of connective tissue that results in tissue necrosis (dead and damaged tissue). The disease occurs infrequently‚ but it can occur in almost any area of the body. In many cases have been caused by Abeta-hemlytic streptococci (Streptococcus pyogenes)‚ and many different bacterial genera and species‚ either alone
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diphtheriae traces closely the development of medical microbiology‚ immunology and molecular biology. Many contributions to these fields‚ as well as to our understanding of host-bacterial interactions‚ have been made studying diphtheria and the diphtheria toxin. Hippocrates provided the first clinical description of diphtheria in the 4th century B.C. There are also references to the disease in ancient Syria and Egypt. In the 17th century‚ murderous epidemics of diphtheria swept Europe; in Spain "El garatillo"
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It is often thought that whooping cough is an outdated disease‚ due to the many ways we now have to combat the pathogen‚ but every year almost 400‚000 people die due to infection with Bordetella pertussis (1‚ 41). Bordetella pertussis is a gram-negative coccobacillus bacterium‚ which causes whooping cough in humans (1‚ 41). The bacterium is spread by air borne particles or mucus droplets and is highly contagious. Although there is no known reservoir for the pathogen humans can often be asymptomatic
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Antioxidants November 23‚ 2012 Organic chemistry is the study of structure‚ properties and the reactions dealing with carbon compounds (organic chemistry‚ n.d.). This type of chemistry may deal with small items‚ but knowing how organic chemistry works as a whole has an impact on our daily lives and also the occupations some of us consider. Knowing the bases of organic chemistry can be important and sometimes even required to learn for the bases of many health care professions
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activated at any point can begin to germinate and produce toxins. These spores that form from B. cereus are be resistant to heat and chemicals. B. cereus is found in approximately 25% of food sampled (3). Foods that are commonly associated with B. cereus are potatoes‚ rice‚ meat‚ vegetables‚ soups‚ and diary products. It is not contagious and is not transmitted human to human. Only if it is ingested or finds a way inside can it form toxins and become threatening to an individual. B. cereus
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of acute gastrointestinal illnesses. The broad categories of diseases that must be considered in the differential diagnosis of an outbreak of acute gastrointestinal illness are Infections‚ preformed toxin‚ and psychogenic illness. However‚ only two of the broad categories (infection and preformed toxin) are most relevant to an outbreak of acute gastrointestinal illness differential diagnosis. Infection Acute gastrointestinal illness of infectious origin results from the growth of a microorganism
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Part l 5. Which substances supply energy to the human body? Nutrients- substances in foods that provide energy and form body tissue necessary for life and growth. -Carbohydrates- sugars‚ starch and fibre -Fats- main form of energy storage in the body -Proteins- amino acids require to build and repair body structures and to regulate processes in the body Part ll 1. Find out how the medical community defines “obesity.” What factors contribute to obesity? Obesity is an abnormal accumulation of body fat
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