Microbes that cause infectious disease

    • [PDF File]INFECTIOUS DISEASES

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      Infectious Diseases • Disease is a disturbance in the state of health • Microbes cause disease in the course of stealing space, nutrients, and/or living tissue from their symbiotic hosts (e.g., us) • To do this, microbes do most of the following: – Gain access to the host (contamination) – Adhere to the host (adherence)


    • [PDF File]7-17 MICROBES AND DISEASE

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      1 2017 MICROBES AND DISEASE Normal flora – Many microbes have a positive symbiotic relationship with other organisms. Mutualism – both organisms benefit. Commensalism – one organisms and the other is not harmed or helped. Parasitism is the condition (one organism is helped and the other is harmed) which takes place when humans are invaded by infectious microbes.


    • [PDF File]NATIONAL INSTITUTE OF ALLERGY AND INFECTIOUS DISEASES ...

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      Since the 19th century, we have known microbes cause infectious diseases. Near the end of the 20th century, researchers began to learn that microbes also contribute to many chronic diseases and conditions. Mounting scientific evidence strongly links them to some forms of cancer, coronary artery disease, diabetes, multiple sclerosis, autism,


    • [PDF File]Mini-Medical School on Infectious Diseases

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      Pathogenesis - the course of the infectious process. "Virulence" factors or "pathogenicity" factors - – Microbes which can cause disease are thought to carry out the process by utilizing one or more properties called virulence factors or pathogenicity factors.


    • [PDF File]Microbes as Agents of Infectious Disease

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      Determinants of Infectious Disease To produce an infectious disease, a pathogen must be able to: 1. initially be transported to the host 2 dh t l i i d th h t2. adhere to, colonize or invade the host 3. grow, multiply, or complete its life cycle in the host 4. initially evade host defense mechanisms


    • [PDF File]The Evolution of Microorganisms and Microbiology

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      Acellular Infectious Agents •Viruses –smallest of all microbes –requires host cell to replicate –cause range of diseases, some cancers •Viroids and virusoids –infectious agents composed of RNA •Prions – infectious proteins 11


    • [PDF File]Chapter 8: Infectious Disease

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      Microbes that cause infectious disease are called pathogens. Some pathogens make a person very sick and then leave him/her immune to future attacks, while others can cause a long-term infection resulting in death. Some infectious diseases last a lifetime and cause infrequent symptoms. The


    • [PDF File]Chapter 1: The Microbial World and You

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      Microbes and Disease:Most microbes are either beneficial or harmless to humans. u Less than 1% of microbes cause disease. u In 1962, the surgeon general of the United States stated: “The war against infectious diseases has been won”. uToday it is clear that this was overly optimistic: u Emerging diseases: New diseases like AIDS,


    • [PDF File]Microbes That Cause Infectious Disease

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      Microbes that cause infectious diseases Part 2 infectious diseases biomed. Bacteria ... division. • Found as spherical, rod and spiral shapes: • Anthrax, Botulism, Cholera, Legionellosis, Lyme Disease, Salmonellas, Strep, TB, Typhoid • Treatable with antibiotics. Bacteria • Salmonella typhus • Staphylococcus aureus • Morphology ...


    • [PDF File]COMMENTARY Social, Behavioural and Environmental Factors ...

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      and Their Impact on Infectious Disease Outbreaks DAVID L. HEYMANN* ABSTRACT The microbes that cause infectious diseases are complex, dynamic, and constantly evolving. They reproduce rapidly, mutate frequently, breach species barriers, adapt with relative ease to new hosts and new environments, and develop resistance to the drugs used to treat them.


    • [PDF File]Microbes and Disease

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      discovered the cause of Cholera-Vibrio cholerae First to grow bacteria in colonies in 1890. on potato slices and his pupil "Petri" on solid gelatin media. • Koch’s postulates formulated The microbe must be present in every case of the disease. The microbe must be isolated from the diseased "host" and grown in a pure culture.


    • [PDF File]Microbes as Agents of Infectious Disease

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      Determinants of Infectious Disease To produce an infectious disease, a pathogen must be able to: 1. initially be transported to the host 2. adhere to, colonize or invade the host 3. grow, multiply, or complete its life cycle in the host 4. initially evade host defense mechanisms 5. damage the host by mechanical and/or chemical means


    • Chapter 13 Microbe-Human Interactions: Infection, Disease ...

      Contact, Colonization, Infection, Disease When microbes have a mutual or commensal relationship with humans, the microbes are called normal resident microbiota. When microbes penetrate the host defense systems an infection can occur, and the microbe is considered a pathogen that causes an infectious disease (Fig. 13.1).


    • Understanding Microbes in Sickness and Health

      Most microbes belong to one of four major groups: bacteria, viruses, fungi, or protozoa. A common word for microbes that cause disease is “germs.” Some people refer to disease-causing microbes as “bugs.” “I’ve got the flu bug,” for example, is a phrase you may hear during the wintertime to describe an influenza virus infection.


    • [PDF File]Understanding Microbes in Sickness and in Health

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      A common word for microbes that cause disease is “germs.” Some people refer to disease-causing microbes as “bugs.” “I’ve got the flu bug,” for example, is a phrase you may hear during the wintertime to describe an influenza virus infection. Since the 19th century, we have known that microbes cause infectious diseases.


    • [PDF File]Causes of Infectious Disease

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      Describe a variety of infectious diseases caused by pathogens, including microorganisms, macroorganisms and non-cellular pathogens, and collect primary and secondary-sourced data and information relating to disease transmission, including: Classifying different pathogens that cause disease in plants and animals


    • [PDF File]Understanding the Epidemiologic Triangle through ...

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      The agent is the cause of the disease. When studying the epidemiology of most infectious diseases, the agent is a microbe—an organism too small to be seen with the naked eye. Disease-causing microbes are bacteria, virus, fungi, and protozoa (a type of parasite). They are what most people call “germs.”


    • [PDF File]Microbiological Classification of Infectious Diseases

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      Infectious Diseases • Disease is a disturbance in the state of health • Microbes cause disease in the course of stealing space, nutrients, and/or living tissue from their symbiotic hosts (e.g., us) • To do this, microbes do most of the following: – Gain access to the host (contamination) – Adhere to the host (adherence)


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