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Important Facts Regarding Immunizations
Important Facts Regarding Immunizations

... other countries3) continue to die each year from preventable diseases, and many more suffer needlessly. It is estimated that immunizations have prevented more than three million childhood deaths annually from measles, neonatal tetanus, and pertussis, along with more than 400,000 cases of polio.4 For ...
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... The SIR model we used yesterday can be modified in a simple way in the case that the illness does not confer immunity. The model is called an SIS model since we assume that individuals return to the Susceptible state after infection. At any given time in the population, each individual is one of the ...
infectious disease and prevention - D
infectious disease and prevention - D

... AFTER you have completed this packet, you will be coming back to this page and recording below what you LEARNED about infectious disease. You will then be able to go back to your previous lists and will be amazed by what fantastic information you have learned! ...
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... the foot. It is the most common fungal skin infection. There are three main types of athlete's foot. Each type affects different parts of the foot, looks different, and may be treated differently. While some people who have athlete's foot do not notice it, others develop severe symptoms. What causes ...
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Cheesy Gland - Zoetis Australia
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... How does infection occur? The bacterium is able to penetrate through unbroken skin, although more commonly infects skin wounds. A slowly enlarging abscess may form at the site of entry or in the regional lymph node. It then may spread via the bloodstream to internal lymph nodes or organs. The bacter ...
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... organisation name] Board members, staff, consumers, volunteers, students and visitors which may arise through passing infections between each other. 2. Definitions Infection requires three main elements — a source of the infectious agent, a mode of transmission and a susceptible host. Infection cont ...
Full text PDF
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... The cost-effectiveness of some NTD control activities would be even higher when broader health gains beyond the targeted diseases are taken into account.25 For example, mass drug administration of albendazole and ivermectin not only helps to fight LF and onchocerciasis but also treats soil-transmitte ...
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... cases of HIV cases were double, instead of what it is today? Experimentally, it is impossible to study due to ethical reasons, but possible with modeling techniques using retrospective data. There are numerous studies carried out on different aspects of microparasitic fish pathogens (viruses, bacter ...
Yellow Fever — Once Again on the Radar Screen in the Americas
Yellow Fever — Once Again on the Radar Screen in the Americas

... reemerged to cause widespread disease predominantly in South America and the Caribbean in the 1990s. This epidemic was followed by West Nile virus in 1999, which has since become endemic in the continental United States, and chikungunya in 2013, which continues to cause disease, predominantly in the ...
Communicable Disease Reference Chart
Communicable Disease Reference Chart

... COMMUNICABLE DISEASE REFERENCE CHART – 2016-2017 The following chart contains information and public health recommendations for various communicable diseases in schools and other group activity settings. Diagnosis should always be made by a physician. Exclusion period given is a minimum amount of ti ...
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Onchocerciasis



Onchocerciasis, also known as river blindness and Robles disease, is a disease caused by infection with the parasitic worm Onchocerca volvulus. Symptoms include severe itching, bumps under the skin, and blindness. It is the second most common cause of blindness due to infection, after trachoma.The parasite worm is spread by the bites of a black fly of the Simulium type. Usually many bites are required before infection occurs. These flies live near rivers, hence the name of the disease. Once inside a person, the worms create larvae that make their way out to the skin. Here they can infect the next black fly that bites the person. There are a number of ways to make the diagnosis including: placing a biopsy of the skin in normal saline and watching for the larva to come out, looking in the eye for larvae, and looking within the bumps under the skin for adult worms.A vaccine against the disease does not exist. Prevention is by avoiding being bitten by flies. This may include the use of insect repellent and proper clothing. Other efforts include those to decrease the fly population by spraying insecticides. Efforts to eradicate the disease by treating entire groups of people twice a year is ongoing in a number of areas of the world. Treatment of those infected is with the medication ivermectin every six to twelve months. This treatment kills the larva but not the adult worms. The medication doxycycline, which kills an associated bacterium called Wolbachia, appears to weaken the worms and is recommended by some as well. Removal of the lumps under the skin by surgery may also be done.About 17 to 25 million people are infected with river blindness, with approximately 0.8 million having some amount of loss of vision. Most infections occur in sub-Saharan Africa, although cases have also been reported in Yemen and isolated areas of Central and South America. In 1915, the physician Rodolfo Robles first linked the worm to eye disease. It is listed by the World Health Organization as a neglected tropical disease.
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