Microbiology EXAM 3/29

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Posted on

May 23rd, 2023

question

A loose network of polymers extending outward from a cell is called a(n)

answer

slime layer

question

Pathogenicity is the ability

answer

of the pathogen to inflict damage on the host

question

Streptocoocus pyogens utilizes M protein and ________ to form microfibrils that facilitate attachment to host cells.

answer

lipoteichoic acid

question

Extensive growth of the streptococci in a thick bacterial layer on acidic glycoproteins on the teeth is called

answer

dental plaque

question

Normal flora in the duodenum are

answer

similar to the microflora in the stomach

question

Cytolytic toxins

answer

are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane

question

Following antibiotic therapy, patients are often administered ________ to facilitate recolonizaton of normal flora.

answer

probiotics

question

Capsules are particularly important for

answer

protecting bacteria from host defense mechanisms

question

Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by host cells

answer

coagulase

question

Attenuation occurs in a laboratory, because

answer

nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media

question

Decalcification of the tooth enamel due to the production of high concentrations of organic acids in the mouth is known as

answer

microbial enamel decalcification

question

A polymer coat consisting of a dense, well- defined polymer layer surrounding a cell is called a

answer

capsule

question

Only particles smaller than ________ µm in diameter reach the lungs.

answer

question

A(n) ________ is a damage or injury to a host organism that impairs its function.

answer

disease

question

Siderophores from some pathogens remove iron from the host protein(s)

answer

both lactoferrin and transferrin

question

Normal flora ________ colonization of pathogenic organisms.

answer

prevent

question

Pathogenic strains of Escherichia coli usually express

answer

colonization factor antigens (CFA)

question

The collective term for the organisms living on or in the human body is

answer

normal microbial flora

question

One microenvironment of the skin is an area where glands produce an oily substance called

answer

sebum

question

Influenza virus targets

answer

respiratory epithelium

1 of 20

question

A loose network of polymers extending outward from a cell is called a(n)

answer

slime layer

question

Pathogenicity is the ability

answer

of the pathogen to inflict damage on the host

question

Streptocoocus pyogens utilizes M protein and ________ to form microfibrils that facilitate attachment to host cells.

answer

lipoteichoic acid

question

Extensive growth of the streptococci in a thick bacterial layer on acidic glycoproteins on the teeth is called

answer

dental plaque

question

Normal flora in the duodenum are

answer

similar to the microflora in the stomach

question

Cytolytic toxins

answer

are extracellular proteins that cause cell lysis and death by damaging the host cytoplasmic membrane

question

Following antibiotic therapy, patients are often administered ________ to facilitate recolonizaton of normal flora.

answer

probiotics

question

Capsules are particularly important for

answer

protecting bacteria from host defense mechanisms

question

Staphylococcus aureus produces ________, leading to fibrin clots that protect them from attack by host cells

answer

coagulase

question

Attenuation occurs in a laboratory, because

answer

nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media

question

Decalcification of the tooth enamel due to the production of high concentrations of organic acids in the mouth is known as

answer

microbial enamel decalcification

question

A polymer coat consisting of a dense, well- defined polymer layer surrounding a cell is called a

answer

capsule

question

Only particles smaller than ________ µm in diameter reach the lungs.

answer

question

A(n) ________ is a damage or injury to a host organism that impairs its function.

answer

disease

question

Siderophores from some pathogens remove iron from the host protein(s)

answer

both lactoferrin and transferrin

question

Normal flora ________ colonization of pathogenic organisms.

answer

prevent

question

Pathogenic strains of Escherichia coli usually express

answer

colonization factor antigens (CFA)

question

The collective term for the organisms living on or in the human body is

answer

normal microbial flora

question

One microenvironment of the skin is an area where glands produce an oily substance called

answer

sebum

question

Influenza virus targets

answer

respiratory epithelium

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