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microbiology chapter 15 test bank 2024/2025 (100% verified)
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microbiology chapter 15 test bank 2024/2025 (100% verified)
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microbiology chapter 15 test bankThe most frequently used portal of entry for pathogens is the - ANSMucous membranes of the
respiratory tract
Most pathogens that gain access through the skin - ANSEnter through hair follicles and sweat
ducts.
The ID50 is - ANSThe dose that will cause an infection in 50 percent of the test population.
The fimbriae of Niesseria Gonorrhea and enteropathogenic E.Coli are examples of -
ANSAdhesions and ligands
All of the following are examples of entry via the parental route EXCEPT - ANSHair follicles
All of the following are used by bacteria to attach to host cells EXCEPT - ANSA-B toxins
Polio is transmitted by ingestion of water contaminated with feces containing polio virus. What
portal of entry does polio virus use? - ANSMucous membranes only
Table 15.1 shows the ID50 for staphylococcus aureus in wounds with and without the
administration of ampicillin before surgery. Based on the data, the administration of ampicillin
before surgery - ANSDecreases the risk of staphylococcal infection
Which organism in Table 15.2 most easily causes an infection? - ANSLegionella Pneumophila
Which organism in table 15.2 causes the most severe disease? - ANSIt cannot be determined
from information provided
Bacteria that cause periodontal disease have adhesins for receptors on streptococci that
colonize on teeth. This indicates that - ANSStreptococcal colonization is necessary for
periodontal disease.
In general, the LD50 for exotoxins is much greater than the LD50 for endotoxins. - ANSFALSE
Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial
agents. - ANSTRUE
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