At its peak‚ about 150‚000 cases of diphtheria occurred in the United States every year. The diphtheria vaccine since it was first used in the United States in the early 1940s‚ has virtually eliminated the disease. Now we see bacterium‚ Clostridium tetani. Unlike most vaccine-preventable diseases‚ tetanus is not a disease
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So unlike other diseases it wouldn’t be any benefit to vaccinate a few since each individual must be vaccinated separately since it is not a contagious disease. Tetanus happens when someone gets a dirty wound that contains a bacteria called Clostridium tetani. The spores in this bacteria grow into a strong toxic called tetanospasmin that damages your muscles and causes stiffness leading to Tetanus. The incubation period can be as short as 24 hours and as long as many months. The average time period
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What are bacteria? Bacteria are very different from viruses. First of all‚ bacteria are much larger in size. The largest virus is only as big as the very smallest bacterium (singular for bacteria). But bacteria are still microscopic and cannot be seen with the naked eye. They are so small that the sizes of bacteria are measured in micrometers (10‚000 micrometers = 1 centimeter). By comparison‚ the head of a pin is about 1000 micrometers wide. Though more complex than a virus‚ the structure of a
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Term | Definition | Systematic Biology / Systematics | * Study of the biodiversity * Quatitative science that uses the characteristics of living and fossil organisms(traits) to infer relationships between organisms over time | Taxonomy | * Branch of systematic biology * Process of identifying‚ naming and organising biodiversity into related categories | Taxon | General name for a group containing an organisms or groups of organisms that exhibit a set of shared traits | Classification
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outside the human body. It thrives on the back of the nose and throat‚ or in the upper respiratory tract. As such‚ this disease is spread through coughing or sneezing or kissing. 3. Tetanus Tetanus is caused by a toxin produced by the bacterium Clostridium tetani. This disease cannot be spread from person to person but the bacterium is present in the soil‚ in the intestines and feces of household and farm animals as well as human excretion. It is a dangerous disease as it attacks the nervous system and
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ISC Board Important Questions Biology [Set-1] Q1. a) (i). Absorption spectrum and Action spectrum Answer: A curve obtained by plotting the amount of absorption of different wavelengths of light by a particular pigment is called absorption spectrum of that pigment. An action spectrum is a curve showing the effectiveness of different wavelengths of light in stimulating the process being investigated. (ii). Heart Wood and Sap Wood Answer: In most trees the outer light colored region of the wood
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The Research of Nazi Germany Origins The rise of the Nazi Party began with the appointment of Adolf Hitler as chancellor of Germany by President Paul von Hindenburg on January 30‚ 1933. Soon after his appointment‚ Adolf began to prepare the state for Nazi rule. The Nazi party was guided by authoritarian principles and began to invoke a Volk society in which religious and class differences would be eradicated. Any political enemies of the Nazi party were subject to intimidation and legislation
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Lab #1 (16th October‚ 2012) Safety in the Microbiology Lab * Clinical specimens received from patients pose a hazard to personnel health because of the infectious agents they may contain. * Spurred by the spread of HIV/AIDS‚ the CDC has recommended safety precautions concerning the handling of patient materials by health care workers. * Universal precaution (or blood and body fluid precaution). * Emphasis on good knowledge and common sense. * Safety is everybody’s business
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Disease : Causes And Control DHRUMIN.J.MEHTA IX DAISIES INTRODUCTION Disease is a condition in which the normal functioninig of the body is disturbed. Many times such conditions may not be very serious and can be cured but some times these conditoins are serious and even fatal. There are many ways disease can be spread like:- * BACTERIA * VIRUS * PARASITIC WORMS * PROTOZOA
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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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