All parts please 1. Which of the following situations would be likely to lead to
ID: 147051 • Letter: A
Question
All parts please
1. Which of the following situations would be likely to lead to an opportunistic infection?
d. The pathogen Vibrio cholerae enters the intestine, where it is not normally found.
2. Which statement best describes microbial antagonism?
d. The normal microbiota prevents a pathogen from establishing an infection by both taking up space and producing toxic substances.
3. Which of the following represents an instance of commensalism?
d. Salmonella colonizes the gallbladder without any effect on the gallbladder.
a. Staphylococcus is conveyed from the skin into the urinary tract; it is normally found in both locations. b. Staphylococcus is present on the skin, where it is normally resident. c. E. coli is conveyed from its normal location in the colon to the urinary tract, where it is not normally found.d. The pathogen Vibrio cholerae enters the intestine, where it is not normally found.
2. Which statement best describes microbial antagonism?
a. The normal microbiota prevents a pathogen from establishing an infection by occupying the available space. b. The normal microbiota prevents a pathogen from establishing an infection by producing toxic substances that prevent pathogenic bacteria growth. c. A member of the normal microbiota causes disease by infecting an area of the body in which it is not normally found.d. The normal microbiota prevents a pathogen from establishing an infection by both taking up space and producing toxic substances.
3. Which of the following represents an instance of commensalism?
a. Clostridium difficile damages the cells lining the intestine. b. Pseudomonas aeruginosa grows in the upper respiratory tract, inducing difficulty in breathing. c. E. coli lives in the host’s intestine and releases vitamins that are absorbed by the host.d. Salmonella colonizes the gallbladder without any effect on the gallbladder.
4.
resident The normal consists of all the microbes that live on or in the host and that do not parasitism cause disease microbial antagonism Symbiotic relationships fall into one of three categories in which one organism microbiota benefits and the other is unaffected , in which both organisms benefit; and mutualism in which one organism benefits and the other is harmed commensalism The organisms are only present for only a short period of time in the body. Through microbiota are long-term residents of the body, whereas opportunistic infections transient the normal microbiota benefits the host by preventing pathogenic pathogenic infections microorganisms from establishing them selves The normal microbiota exhibits which protects the host from may occur when members of the normal microbiota colonize abnormal regions of the host.Explanation / Answer
1. b
staphylococcus is present on the skin,where it is normally resident
2.b
the normal microbiota prevent a pathogen from establishing an infection by producing toxic substances that prevent pathogenic bacterial growth
3.c
E.coli lives in the host intestine and releases vitamins that absorbed by the host