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Microbiology: Infectious Disease and Symbiosis Review

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  • What is mutualism in microbiology?

    Mutualism is a symbiotic relationship where both organisms benefit.

  • Define symptoms in the context of infectious disease.

    Symptoms are subjective effects of disease experienced by the patient, such as pain or fatigue.

  • When can normal microbiota become opportunistic pathogens?

    When the host's immune system is weakened, normal microbiota can cause disease as opportunistic pathogens.

  • Which stages of infectious disease are considered severe?

    The illness and decline stages are typically the most severe phases of infectious disease.

  • Give an example of vehicle transmission.

    Vehicle transmission occurs via a medium like water, food, or air; for example, contaminated water spreading cholera.

  • What are signs of disease?

    Signs are objective evidence of disease observed by others, such as fever or rash.

  • What was the most likely mode of cholera transmission in Haiti after the 2010 earthquake?

    The most likely mode was vehicle transmission through contaminated water.

  • What did Koch's postulates demonstrate?

    Koch's postulates demonstrated the relationship between a specific microorganism and a disease.

  • What is the correct sequence of a disease process?

    The sequence is: incubation period, prodromal period, illness, decline, and convalescence.

  • How are cold viruses commonly transmitted according to handwashing observations?

    Cold viruses are commonly transmitted by contact transmission, especially via hands.

  • How is a pathogen best described?

    A pathogen is a microorganism that causes disease in a host.

  • What public health measures can stop the spread of a new influenza strain?

    Measures include vaccination, quarantine, hand hygiene, and public education.

  • Define commensalism.

    Commensalism is a symbiotic relationship where one organism benefits and the other is neither helped nor harmed.

  • What characterizes parasitism?

    Parasitism is a relationship where one organism benefits at the expense of the other.

  • What is a reservoir in infectious disease?

    A reservoir is a natural habitat where a pathogen normally lives and multiplies.