Page |1
BHS 329 Midterm Questions and Correct
Answers/ Latest Update / Already Graded
Pathogenicity
Ans: qualities that promote the production of disease
Virulence
Ans: potency of the pathogen indicated by the ratio of the
number of cases compared to number of exposures
Infectivity
Ans: proportion of exposures needed to cause infection in an
individual
Toxigenicity
Ans: ability of the pathogen to produce harmful toxins that
increase host cell and tissue damage
Antigenicity
Ans: level to which a pathogen is viewed by the host immune
system as foreign
All rights reserved © 2025/ 2026 |
, Page |2
Antigenic variability
Ans: process of eluding the human host defenses, often
consists of altering antigen presentation
Pathogenic defense mechanisms
Ans: ways in which a pathogen has developed to avoid
destruction by host
Coinfection
Ans: hosting two or more pathogens simultaneously
Superinfection
Ans: when an infection arises in addition to one that is already
present
Endotoxin
Ans: complex of phospholipid-polysaccharide molecules that
form the structural component of the gram-negative cell wall,
causes inflammatory response when bacterium is lysed
All rights reserved © 2025/ 2026 |
, Page |3
Exotoxins
Ans: potent substances that result in host cell dysfunction or
lysis
Neisseria meningitidis
Ans: meningitis
Streptococcus pyogenes
Ans: - septicemia
- myositis
- necrotizing fascitis
Streptococcus pneumoniae
Ans: - pneumonia
- meningitis
- otitis media
Staphylococcus aureus
Ans: - endocarditis
- cellulitis
All rights reserved © 2025/ 2026 |
BHS 329 Midterm Questions and Correct
Answers/ Latest Update / Already Graded
Pathogenicity
Ans: qualities that promote the production of disease
Virulence
Ans: potency of the pathogen indicated by the ratio of the
number of cases compared to number of exposures
Infectivity
Ans: proportion of exposures needed to cause infection in an
individual
Toxigenicity
Ans: ability of the pathogen to produce harmful toxins that
increase host cell and tissue damage
Antigenicity
Ans: level to which a pathogen is viewed by the host immune
system as foreign
All rights reserved © 2025/ 2026 |
, Page |2
Antigenic variability
Ans: process of eluding the human host defenses, often
consists of altering antigen presentation
Pathogenic defense mechanisms
Ans: ways in which a pathogen has developed to avoid
destruction by host
Coinfection
Ans: hosting two or more pathogens simultaneously
Superinfection
Ans: when an infection arises in addition to one that is already
present
Endotoxin
Ans: complex of phospholipid-polysaccharide molecules that
form the structural component of the gram-negative cell wall,
causes inflammatory response when bacterium is lysed
All rights reserved © 2025/ 2026 |
, Page |3
Exotoxins
Ans: potent substances that result in host cell dysfunction or
lysis
Neisseria meningitidis
Ans: meningitis
Streptococcus pyogenes
Ans: - septicemia
- myositis
- necrotizing fascitis
Streptococcus pneumoniae
Ans: - pneumonia
- meningitis
- otitis media
Staphylococcus aureus
Ans: - endocarditis
- cellulitis
All rights reserved © 2025/ 2026 |
