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Ebola virus disease (EVD), also known as Ebola hemorrhagic fever (EHF) or simply Ebola, is a viral hemorrhagic fever of humans and other primates caused by ebolaviruses.Signs and symptoms typically start between two days and three weeks after contracting the virus with a fever, sore throat, muscular pain, and headaches. Vomiting, diarrhea and rash usually follow, along with decreased function of the liver and kidneys. At this time, some people begin to bleed both internally and externally.The disease has a high risk of death, killing 25% to 90% of those infected, with an average of about 50%. This is often due to low blood pressure from fluid loss, and typically follows 6 to 16 days after symptoms appear.
The virus spreads through direct contact with body fluids, such as blood from infected humans or other animals. Spread may also occur from contact with items recently contaminated with bodily fluids.Spread of the disease through the air between primates, including humans, has not been documented in either laboratory or natural conditions. Semen or breast milk of a person after recovery from EVD may carry the virus for several weeks to months.Fruit bats are believed to be the normal carrier in nature, able to spread the virus without being affected by it.Other diseases such as malaria, cholera, typhoid fever, meningitis and other viral hemorrhagic fevers may resemble EVD. Blood samples are tested for viral RNA, viral antibodies or for the virus itself to confirm the diagnosis.
Dr. Shewayish shows how public health is an essential component of economic prosperity. This is at no time a more poignant argument than in the midst of the current pandemic, where it is clear that the key to economic recovery is to vanquish the coronavirus outbreak. As we have seen in the Spring and early Summer of 2020, infectious diseases can affect a large swath of the business sector, from agriculture, to manufacturing, transportation, hospitality/travel, and many others. Some industries may have a business model that is incompatible with an infection outbreak. Others may ride the wave of increased demand that occurs as a result of the disease’s impact on a society. A disease outbreak may also cause individuals to withdraw from the economy due to fear, job loss, or reduced services. Investing in public health is an endeavor that pays countless dividends. As the pandemic shows, societies around the world need to do more to invest in the health of their populations and in preparing for the next outbreak that may impact us.
To study and identify common disease-causing organisms like Ascaris, Entamoeba, Plasmodium, Ringworm, through permanent slides or specimens and comment on the symptoms of the disease that they cause. Video Rating: / 5
The global travel industry has been hit hard by the coronavirus pandemic and could take until 2023 to fully recover.
#GlobalTravel #coronavirus #Covid-19
What is the Pentose Phosphate Pathway? Why is it important? Created by Jasmine Rana.
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MCAT on Khan Academy: Go ahead and practice some passage-based questions!
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Using incredible videography, photos, animation and graphics, this information-packed video introduces students to biological vectors. Viewers will learn that biological vectors carry and transmit disease that affect plants, animals and humans.
The program explores various types of diseases spread by vectors including, Zika, Lyme Disease, Malaria, Dengue and Yellow Fever. The video vividly demonstrates how a mosquito sucks blood from a human and then explains how a pathogen is transmitted.
Students will learn how scientists who study insects and infectious diseases can use the information they gather to help control and prevent the transmission of vector-borne diseases around the world.
By viewing this video, discussing the concepts that are presented, and participating in the accompanying activities, students will be able to:
• Learn that biological vectors are animals that carry and transmit disease
• Name the types of animals that can become vectors
• Understand how a mosquito transmits diseases
• Recognize that scientists develop ways to prevent and control the spread of vector-borne diseases
• Understand the natural history of vectors
• Realize that mosquitoes are the most dangerous animal on the planet
Infection is the invasion of an organism’s body tissues by disease-causing agents, their multiplication, and the reaction of host tissues to the infectious agents and the toxins they produce. Infectious disease, also known as transmissible disease or communicable disease, is illness resulting from an infection.
Infections are caused by infectious agents (pathogens). Hosts can fight infections using their immune system. Mammalian hosts react to infections with an innate response, often involving inflammation, followed by an adaptive response.
Specific medications used to treat infections include antibiotics, antivirals, anti-fungals, antiprotozoals, and antihelminthics. Infectious diseases resulted in 9.2 million deaths in 2013 (about 17% of all deaths). The branch of medicine that focuses on infections is referred to as infectious disease.
In epidemiology, a disease vector is any agent which carries and transmits an infectious pathogen into another living organism; most agents regarded as vectors are organisms, such as intermediate parasites or microbes, but it could be an inanimate medium of infection such as dust particles.
Arthropods form a major group of pathogen vectors with mosquitoes, flies, sand flies, lice, fleas, ticks, and mites transmitting a huge number of pathogens. Many such vectors are haematophagous, which feed on blood at some or all stages of their lives. When the insects blood feed, the pathogen enters the blood stream of the host. This can happen in different ways.
The Anopheles mosquito, a vector for malaria, filariasis, and various arthropod-borne-viruses (arboviruses), inserts its delicate mouthpart under the skin and feeds on its host’s blood. The parasites the mosquito carries are usually located in its salivary glands (used by mosquitoes to anaesthetise the host). Therefore, the parasites are transmitted directly into the host’s blood stream. Pool feeders such as the sand fly and black fly, vectors for pathogens causing leishmaniasis and onchocerciasis respectively, will chew a well in the host’s skin, forming a small pool of blood from which they feed. Leishmania parasites then infect the host through the saliva of the sand fly. Onchocerca force their own way out of the insect’s head into the pool of blood.
Some plants and fungi act as vectors for various pathogens. For example, the big-vein disease of lettuce was long thought to be caused by a member of the fungal division Chytridiomycota, namely Olpidium brassicae. Eventually however, the disease was shown to be viral. Later it transpired that the virus was transmitted by the zoospores of the fungus and also survived in the resting spores. Since then, many other fungi in the Chytridiomycota have been shown to vector plant viruses.
Many plant pests that seriously damage important crops depend on other plants, often weeds, to harbor or vector them; the distinction is not always clear. In the case of Puccinia graminis for example, Berberis and related genera act as alternate hosts in a cycle of infection of grain.
defenses of the hosts they infect. The appearance and severity of disease resulting from any pathogen, depends upon the ability of that pathogen to damage the host as well as the ability of the host to resist the pathogen. However a host’s immune system can also cause damage to the host itself in an attempt to control the infection. Clinicians therefore classify infectious microorganisms or microbes according to the status of host defenses – either as primary pathogens or as opportunistic pathogens. Video Rating: / 5
With the growing global human population, environmental changes, and increases in animal travel, animals and humans are interacting in new ways.
Because animals and humans rely on each other so much, this contact can enable diseases to spread between them.
Mosquitoes, fleas, ticks, and sand-flies are parasites to animals and humans—and when these parasites spread microscopic organisms they are called “vectors”.
Diseases like Lyme Disease, West Nile Disease, Leishmaniosis and Dirofilaria repens can infect both animals and humans. When an infectious disease is shared between different species, like humans and animals, science calls this “zoonosis”.
Scientists around the world recognize the importance of companion vector-borne diseases and the role animals have in the spread of these diseases.
Science even says that 75% of emerging or re-emerging animal diseases can also affect us.
Because the health of humans and animals is closely linked, public health experts are working together to focus on companion animal vector-borne diseases, under the “One Health” banner .
Through the concept of “One Health”, healthcare professionals and policy makers can plan new strategies to protect against the diseases that spread between animals and humans to keep everyone healthy.
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What is DISEASE? What does DISEASE mean? DISEASE meaning, definition, explanation & pronunciation.
A disease is a particular abnormal condition, a disorder of a structure or function, that affects part or all of an organism.
The causal study of disease is called pathology. Disease is often construed as a medical condition associated with specific symptoms and signs. It may be caused by external factors such as pathogens, or it may be caused by internal dysfunctions, such as autoimmune diseases. Diseases usually affect people not only physically, but also emotionally, as contracting and living with a disease can alter one’s perspective on life as well as one’s personality.
Death due to disease is called death by natural causes. There are four main types of disease: infectious disease, deficiency disease, genetic disease, and physiological disease. Diseases can also be classified as communicable and non-communicable.
The deadliest diseases in humans are coronary artery disease (blood flow obstruction), followed by cerebrovascular disease and lower respiratory infections.
Video shows what disease means. An abnormal condition of the body or mind that causes discomfort or dysfunction; distinct from injury insofar as the latter is usually instantaneously acquired.. Any abnormal or harmful condition, as of society, people’s attitudes, way of living etc.. Lack of ease; uneasiness; trouble; vexation; disquiet.. disease synonyms: affliction, ailment, complaint, ill health, illness, malady, medical condition, morbus, rot, sickness, Wikisaurus:disease. disease pronunciation. How to pronounce, definition by Wiktionary dictionary. disease meaning. Powered by MaryTTS Video Rating: / 5
In this episode of Inside Infection Control, Dr. Abby talks about how respiratory droplets can make their way to surfaces and then to people – information you need to know so you can use infection control actions to stop it.
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Take a look at what Communicable diseases are, what causes them and how they are transmitted.
The National Institute for Communicable Diseases is a resource of knowledge and expertise in regionally relevant communicable diseases to the South African Government, to SADC countries and the African continent.
#CommunicableDiseases #InfectiousDiseases #NICD Video Rating: / 5
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