BIOS 251 Lab Quiz 1 - –Answer It is not known to cause disease in h...

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BIOS 251 Lab Quiz 1

• What is the Health Risk of a BSL 1 disease?

–Answer It is not known to cause disease in healthy humans.

• What is the Health Risk of a BSL 2 disease?

–Answer Associated with human disease in healthy humans, but easily contained.

• Define Ubiquitous

–Answer Can be found in every habitat on earth.

• What are Commensals?

–Answer Microbes that inhabit our bodies in ways that may benefit both them and us.

• What are Opportunists?

–Answer Microbes that when they have the opportunity to cause disease they will often do so.

• What are Transient Flora?

–Answer Organisms that are less permanent and present for only short periods.

• What are Resident Flora?

–Answer Organisms which are entrenched in layers of the skin and always present.

• Which is harder to get rid from washing your hands, Transient or Resident Flora?

–Answer Resident Flora are harder to get rid of.

• What is a Nosocomial Infection?

–Answer An infectious disease acquired in a health care setting. 1 / 2

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• How does the alcohol in hand sanitizers kill bacteria?

–Answer The alcohol functions to denature proteins and disrupt the plasma membranes.

• Against what organisms is hand sanitizer not good for killing?

–Answer Its func- tionality is reduced against non-enveloped viruses, and it non-functional against bacterial spores and protozoan oocysts.

• What is a Fomite?

–Answer A person or object that carries microbes from one person or place to another.

• What is Agar?

–Answer Solid media on which bacteria grow.

• What is General Purpose Media?

–Answer A media that grows a wide range of mi- crobes.

• What is Enrichment Media?

–Answer A media that provides extra food, chemicals, & nutrients or something extra.

• What is Selective Media?

–Answer A media that has conditions that favor the growth of some organisms & inhibit the growth of other organisms.

• What is Differential Media?

–Answer A media that can distinguish different types of bacteria by containing substances that change color or form.

• What is Hemolysis?

–Answer The lysis of blood cells.

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