18 Questions
What is the role of a microbiologist in relation to antimicrobial treatment?
To provide accurate diagnosis and rapid reporting
Where do some bacteria that make up our normal flora live?
On the surface of our eyes, skin, and in the ear
What is the term for the relationship where one organism benefits and the other is unaffected?
Commensalism
What can occur when normal flora bacteria leave their habitat?
They can cause infections
Why is it important to avoid overuse/misuse of antimicrobials?
To target only the pathogenic microorganisms
What is the goal of antimicrobial treatment in relation to normal flora?
To target only the pathogenic microorganisms
What is the estimated number of bacteria on the skin of a human adult?
10^12
Which of the following is an example of mutualism in the human microbiome?
E. coli synthesizing vitamin K and some B vitamins
What is the term for the microbes that are always present on or within the body?
Resident flora
Which type of symbiotic relationship is characterized by one organism benefiting and the other being unaffected?
Commensalism
What is the term for the relationship between the normal flora and the host?
Symbiosis
Which of the following microorganisms is an example of a pathogenic microorganism that can cause infections when the normal flora is greatly reduced?
C. albicans
What is the role of normal flora in preventing disease?
By producing substances that inhibit or kill nonindigenous species
What is the definition of parasitism?
A relationship in which one organism lives at the expense of the other
What can occur when normal flora changes its anatomic location?
The normal flora can cause disease
What is the study of parasites that infect humans known as?
Medical parasitology
What is an example of a protozoan parasite?
Plasmodium
What is the term for a parasite that lives within another living organism?
Endoparasite
Test your understanding of commensalism and parasitism, two types of symbiotic relationships. Learn how these relationships affect the organisms involved and how they relate to the normal flora of the human body.
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