MMSC438 Exam 2 Questions and Correct Answers

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MMSC438 Exam 2 Questions and Correct
Answers
LRT defense mechanisms Ans: — -competitive inhibition by
normal biota

-removal of pathogens

-immune response

bacterial pathogenic mechanisms Ans: — -evasion of host defenses

-adhesion to host respiratory (epithelial) cells

-toxin production

routes of transmission Ans: — -person-to-person

-aspiration of endogenous biota

-trauma

-enviornmental and animal reservoirs

-fomites

LRT collection Ans: — -oropharyngeal swabs

-nasopharyngeal swabs

-sinus aspiration

candidiasis (culture site) Ans: — swab buccal mucosa, tongue,
oropharynx

diphtheria (culture site) Ans: — nasopharyngeal or throat swab


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epiglottitis (culture site) Ans: — blood culture

pertussis (culture site) Ans: — posterior nasopharynx swab

nasopharyngeal MRSA screening Ans: — swab of nares

sinusitis Ans: — -viral infection leading to secondary bacterial
infection

-common cold (most common): S. pneumonia, H. influenzas, M.
catarrhalis

-fungi: immunocompromised (opportunistic)

-symptoms: facial pain or pressure

pharyngitis Ans: — -common in school-aged children

-S. pyogenes

-treatment: penicillin

S. pyogenes Ans: — -GPC

-catalase negative

-group A strep and b-hemolytic strep

-post-streptococcal sequelae --> rheumatic fever

diphtheria Ans: — -Corynebacterium diphtheriae

-symptoms: sore throat dysphagia

-toxin-mediated: exotoxin --> blocks protein synthesis

-obstruction of airway by pseudomembrane

-myocarditis

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