BHS 329 MIDTERM EXAM QUESTIONS AND ANSWERS 100% PASS

BHS 329 MIDTERM EXAM QUESTIONS
AND ANSWERS 100% PASS




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


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

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, 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


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
- pneumonia
- osteomyelitis
- septicemia


Escherichia coli - ANS - urogenital tract infection
- diarrhea


Salmonella typhi - ANS - enterocolitis
- bacteremia
- typhoid

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