BIO 212 UNIT 3 (2) EXAM QUESTIONS AND ANSWERS
Robert Koch - CORRECT ANSWER✅✅Proposed a series of postulates (hypothesis) based on the idea
that the cause of a specific disease could be attributed to a specific microbe.
Germ Theory of Disease - CORRECT ANSWER✅✅Idea that infectious diseases are caused by
microorganisms
Koch's Postulates - CORRECT ANSWER✅✅1. It must be found in all cases of the disease examine and
must be
absent from healthy organisms.
2. The suspected pathogen must be prepared and maintained in a
pure culture.
3. the cultured organism must be capable of producing the original
infection, even after several generations in culture.
4. the same organism must be retrievable from an inoculated animal and cultured again.
Pathogen - CORRECT ANSWER✅✅An organism that causes disease
Parasite - CORRECT ANSWER✅✅A protozoan or worm (helminth) that causes diseases in humans
Pathogenicity - CORRECT ANSWER✅✅The ability of the organism to cause diease
Microbiota - CORRECT ANSWER✅✅The collection of all microbes on the human body
Colonization - CORRECT ANSWER✅✅The ability of the microbe to stay attached to the body surface
and replicate
, Adhesins - CORRECT ANSWER✅✅Enable parasites to attach to host cells or tissues
Infection - CORRECT ANSWER✅✅Occurs when a pathogen or parasite enters and begins to grow on the
host
Acute Infection - CORRECT ANSWER✅✅Symptoms develop and resolve rapidly (common cold)
Chronic infection - CORRECT ANSWER✅✅involves symptoms that develop gradually and resolve slowly
Virulence - CORRECT ANSWER✅✅Describes the level of harm caused by a pathogen following infection
Invasion - CORRECT ANSWER✅✅The entry of a pathogen into a living cell, where it then lives
Primary pathogens - CORRECT ANSWER✅✅Cause disease in healthy hosts
- Rapid reproduce/increase in number
- Moderate to high virulence
Opportunistic pathogens - CORRECT ANSWER✅✅Less likely to cause disease in a health host
- Low virulence
Host range - CORRECT ANSWER✅✅Refers to the animals a pathogen can infect and produce disease
Disease - CORRECT ANSWER✅✅Disruption of the normal structure or function of any body part, organ,
or system that can be recognized by a characteristic set of symptoms and signs
infectious disease - CORRECT ANSWER✅✅A disease that is caused by a pathogen and that can be
spread from one individual to another
Robert Koch - CORRECT ANSWER✅✅Proposed a series of postulates (hypothesis) based on the idea
that the cause of a specific disease could be attributed to a specific microbe.
Germ Theory of Disease - CORRECT ANSWER✅✅Idea that infectious diseases are caused by
microorganisms
Koch's Postulates - CORRECT ANSWER✅✅1. It must be found in all cases of the disease examine and
must be
absent from healthy organisms.
2. The suspected pathogen must be prepared and maintained in a
pure culture.
3. the cultured organism must be capable of producing the original
infection, even after several generations in culture.
4. the same organism must be retrievable from an inoculated animal and cultured again.
Pathogen - CORRECT ANSWER✅✅An organism that causes disease
Parasite - CORRECT ANSWER✅✅A protozoan or worm (helminth) that causes diseases in humans
Pathogenicity - CORRECT ANSWER✅✅The ability of the organism to cause diease
Microbiota - CORRECT ANSWER✅✅The collection of all microbes on the human body
Colonization - CORRECT ANSWER✅✅The ability of the microbe to stay attached to the body surface
and replicate
, Adhesins - CORRECT ANSWER✅✅Enable parasites to attach to host cells or tissues
Infection - CORRECT ANSWER✅✅Occurs when a pathogen or parasite enters and begins to grow on the
host
Acute Infection - CORRECT ANSWER✅✅Symptoms develop and resolve rapidly (common cold)
Chronic infection - CORRECT ANSWER✅✅involves symptoms that develop gradually and resolve slowly
Virulence - CORRECT ANSWER✅✅Describes the level of harm caused by a pathogen following infection
Invasion - CORRECT ANSWER✅✅The entry of a pathogen into a living cell, where it then lives
Primary pathogens - CORRECT ANSWER✅✅Cause disease in healthy hosts
- Rapid reproduce/increase in number
- Moderate to high virulence
Opportunistic pathogens - CORRECT ANSWER✅✅Less likely to cause disease in a health host
- Low virulence
Host range - CORRECT ANSWER✅✅Refers to the animals a pathogen can infect and produce disease
Disease - CORRECT ANSWER✅✅Disruption of the normal structure or function of any body part, organ,
or system that can be recognized by a characteristic set of symptoms and signs
infectious disease - CORRECT ANSWER✅✅A disease that is caused by a pathogen and that can be
spread from one individual to another
