COMSAE Cramming UPDATED Questions
and CORRECT Answers
Most exotoxins are heat (labile/stabile) - CORRECT ANSWER - Labile
Which exotoxins are heat stabile? - CORRECT ANSWER - S. aureus and B. cerus
(enterotoxin, food poisoning, no antibiotic treatment)
Neisseria meningitis is a gram ___ _____ - CORRECT ANSWER - negative diplococci,
obligate intracellular
Bacteroides fragilis is a gram _____ strict ____ and causes _____ - CORRECT
ANSWER - Gram negative strict anaerobe and causes pelvic or bowl abscess.
Tx: metronidazole or clindamycin + surgical drainage
Culture Media: Gonorrhea - CORRECT ANSWER - Thayer-Martin (chocolate)
H. influenza - CORRECT ANSWER - Chocolate
C. diphtheria - CORRECT ANSWER - Loffler's + Tellurite
Bordetella pertussis - CORRECT ANSWER - Bordet-Gengou (Potato extract)
M. tuberculosis - CORRECT ANSWER - Loweenstein-Jensen agat
Legionella - CORRECT ANSWER - Charcoal yeast extract agar
Mycoplasma pneumoniae - CORRECT ANSWER - Eaton's agar (provides sterols)
,Fungi - CORRECT ANSWER - Sabouraud's agar (contains peptides)
E. Coli - CORRECT ANSWER - EMB - eosin - methylene blue green metallic colonies
Lactose fermenting bacteria (enterobacter, klebsellia) - CORRECT ANSWER -
MacConkey's (decreased pH produces pink colonies)
Strep Pneumoniae is a gram ___, ______ shaped, _______ with a ______ - CORRECT
ANSWER - Gram positive, lancet-shaped, diplococci with a capsule
Causes adult bacterial meningitis and community acquired PNA
Secretes IgA proteases
Optochin-sensitive
Alpha hemolytic
Virulence factor - capsule
Cat scratch organism - CORRECT ANSWER - Bartonella, treat with azithro, DO NOT
ASPIRATE
Cat bite organism - CORRECT ANSWER - Paseurella
Cat Poop - CORRECT ANSWER - Toxo gondii
Most common bacterial STD in US? - CORRECT ANSWER - Chlamydia
Rose spots on belly, constipation and diarrhea, gram negative motile bacteria with FLAGELLA
and lactose non-fermenter (produces sulfide) .... what is it? - CORRECT ANSWER -
Salmonella typhoid/typhoid fever
Treat with ceftriaxone
, Treat carriers with cipro or ampicillin
Resists phagocytosis via Vi polysaccharide
Rickettsia treatment for over 8yo - CORRECT ANSWER - Doxycycline
Rickettsia treatment when pregnant - CORRECT ANSWER - Chloramphenicol
Rickettsia treatment under 8 yo - CORRECT ANSWER - Amoxicillin
Rash on palm and soles which spreads to trunk, meningoencephalitis, renal failure - related to
dog tick (dermacentor) - CORRECT ANSWER - Rickettsia rickettssii (Rocky Mountain
Spotted Fever)
Endemic typhus, spread by body louse, rash on trunk that spreads peripherally, maculopapular
petechiae, common in homeless - CORRECT ANSWER - Rickettsia prowazekii
Endemic typhus (murine typhus), fleas on rats, discrete rash after six days - CORRECT
ANSWER - Ricketssia typhi
Q fever, a type of rickettsia, seen in cattle farmers, severe onset fever and dry cough but NO
RASH - CORRECT ANSWER - Coxiella burnetii
Thumb print sign, drooling in child, sniffing position = - CORRECT ANSWER - epiglottis
Reactive arthritis associated with urethritis, cervicitis, and conjunctivitis (most commonly
chlamydia or shigella related) - CORRECT ANSWER - Reiter's Syndrome
Infection localized to lymphatic tissues, presents as cervical lyphadenitis in children, cured by
excision and chemotherapy - CORRECT ANSWER - Mycobacterium scrofulaceum
and CORRECT Answers
Most exotoxins are heat (labile/stabile) - CORRECT ANSWER - Labile
Which exotoxins are heat stabile? - CORRECT ANSWER - S. aureus and B. cerus
(enterotoxin, food poisoning, no antibiotic treatment)
Neisseria meningitis is a gram ___ _____ - CORRECT ANSWER - negative diplococci,
obligate intracellular
Bacteroides fragilis is a gram _____ strict ____ and causes _____ - CORRECT
ANSWER - Gram negative strict anaerobe and causes pelvic or bowl abscess.
Tx: metronidazole or clindamycin + surgical drainage
Culture Media: Gonorrhea - CORRECT ANSWER - Thayer-Martin (chocolate)
H. influenza - CORRECT ANSWER - Chocolate
C. diphtheria - CORRECT ANSWER - Loffler's + Tellurite
Bordetella pertussis - CORRECT ANSWER - Bordet-Gengou (Potato extract)
M. tuberculosis - CORRECT ANSWER - Loweenstein-Jensen agat
Legionella - CORRECT ANSWER - Charcoal yeast extract agar
Mycoplasma pneumoniae - CORRECT ANSWER - Eaton's agar (provides sterols)
,Fungi - CORRECT ANSWER - Sabouraud's agar (contains peptides)
E. Coli - CORRECT ANSWER - EMB - eosin - methylene blue green metallic colonies
Lactose fermenting bacteria (enterobacter, klebsellia) - CORRECT ANSWER -
MacConkey's (decreased pH produces pink colonies)
Strep Pneumoniae is a gram ___, ______ shaped, _______ with a ______ - CORRECT
ANSWER - Gram positive, lancet-shaped, diplococci with a capsule
Causes adult bacterial meningitis and community acquired PNA
Secretes IgA proteases
Optochin-sensitive
Alpha hemolytic
Virulence factor - capsule
Cat scratch organism - CORRECT ANSWER - Bartonella, treat with azithro, DO NOT
ASPIRATE
Cat bite organism - CORRECT ANSWER - Paseurella
Cat Poop - CORRECT ANSWER - Toxo gondii
Most common bacterial STD in US? - CORRECT ANSWER - Chlamydia
Rose spots on belly, constipation and diarrhea, gram negative motile bacteria with FLAGELLA
and lactose non-fermenter (produces sulfide) .... what is it? - CORRECT ANSWER -
Salmonella typhoid/typhoid fever
Treat with ceftriaxone
, Treat carriers with cipro or ampicillin
Resists phagocytosis via Vi polysaccharide
Rickettsia treatment for over 8yo - CORRECT ANSWER - Doxycycline
Rickettsia treatment when pregnant - CORRECT ANSWER - Chloramphenicol
Rickettsia treatment under 8 yo - CORRECT ANSWER - Amoxicillin
Rash on palm and soles which spreads to trunk, meningoencephalitis, renal failure - related to
dog tick (dermacentor) - CORRECT ANSWER - Rickettsia rickettssii (Rocky Mountain
Spotted Fever)
Endemic typhus, spread by body louse, rash on trunk that spreads peripherally, maculopapular
petechiae, common in homeless - CORRECT ANSWER - Rickettsia prowazekii
Endemic typhus (murine typhus), fleas on rats, discrete rash after six days - CORRECT
ANSWER - Ricketssia typhi
Q fever, a type of rickettsia, seen in cattle farmers, severe onset fever and dry cough but NO
RASH - CORRECT ANSWER - Coxiella burnetii
Thumb print sign, drooling in child, sniffing position = - CORRECT ANSWER - epiglottis
Reactive arthritis associated with urethritis, cervicitis, and conjunctivitis (most commonly
chlamydia or shigella related) - CORRECT ANSWER - Reiter's Syndrome
Infection localized to lymphatic tissues, presents as cervical lyphadenitis in children, cured by
excision and chemotherapy - CORRECT ANSWER - Mycobacterium scrofulaceum
