Download - Common Gram Negative Bacteria
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Common Gram Negative
BacteriaAug. 2, 2016
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1. Which of the following is true aboutNeisseria
A. Nonmotile an! catalase an!o"i!ase #ositive
B. $nhibite! b% the #resence ofvancom%cin or lincom%cin, colistin,an! n%statin
C. Anaerobic, gram&negative cocci
'. Catalase test is a (e% test fori!entif%ing them
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2. Gram&negative !i#lococci recovere!from an
)*) #late an! giving a #ositiveo"i!ase test
can be #resum#tivel% i!enti+e! as
A.Neisseria gonorrhoeae
B. Neisseria meningitidis
C. Neisseria lactamica
'. All of the Above
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-. 'ierentiation of N. gonorrhea an!N. meningiti!is can be !one b%
A. Glucose /ermentation
B. eaction
C. )altose /ermentation
'. $n!ole *est
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3. *he 4&galactosi!ase test ai!s in thei!enti+cation of which Neisserias#ecies
A. N. lactamica
B. N. meningiti!is
C. N. gonorrhoeae'. N. 5avescens
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. C%stine tr%#tic !igest 7C*A8 me!ia use! fori!enti+cation of Neisseria s##. shoul!beinoculate! an! culture! in
A. A C92 incubator at -:C for 23 hoursB. A C92 incubator at 32:C for u# to ;2 hours
C. A nonC92incubator at -:C for u# to ;2hours
'. An anaerobic incubator at -:C for u# to
;2 hours
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6. A useful test to !ierentiateMoraxellacatarrhalis fromsa#ro#h%tic Neisseriaein res#irator%sam#les is
A. But%rate esterase
B. Gram stain
C. Growth on < shee# bloo! agar
'. =
>. 9"i!ase
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;. Biochemicall%, the >nterobacteriaceaeare
gram&negative ro!s that
A. /erment glucose, re!uce nitrate to nitrite, an!
are o"i!ase negativeB. /erment glucose, #ro!uce in!o#henol o"i!ase,
an! form gas
C. /erment lactose an! re!uce nitrite to
nitrogen gas
'. /erment lactose an! #ro!uce in!o#henolo"i!ase
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?. >*>C
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@. >>C
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10. >>C
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11. What is the causative agent ofgranuloma inguinale
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12. *he swarming gram&negative bacillusthat can be !escribe! as o"i!ase&negative, nitrateositive, in!ole&
negative, an! 2ositive is mostl%li(el% which of the following
A. roteus aerogenes
B. roteus vulgarisC. roteus mirabilis
'. >scherichia col
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1-. Which of the following is trueregar!ing the #athogenesis ofhigella
A. >ssential #athologic #rocess isinvasion of
the mucosal e#ithelial cells
B. $nfective !ose 10 organisms
C. 'oes not cause !%senter%
'. ong incubation #erio! 7;&10 !a%s8
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13. *he laborator% !iagnosis ofhigella are the following e"ce#t
A. actose Negative
B. Drease Negative
C. *$ Al(aline 7re! slant8Eaci! 7%ellowbutt8
'. 7&8 gas , 7&8 2
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1. *he mor#holog% an! i!enti+cationof salmonella are the followinge"ce#t
A. Gram Negative Bacilli
B. )otile with eritrichous 5agella
C. /erments lactose or sucrose, 2#ro!ucer
'. ensitive to Brilliant Green, o!ium!eo"%cholate, o!ium tetrathionate
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16 &1;. 9n Wilson F Blair bismuthsul#hite me!ia . t%#hi #ro!uce
colonies !ue to
#ro!uction of
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1?. Which of the following is trueregar!ing the !iagnosis of >ntericfever
A. Bloo! culture is #ositive in thir!wee(
B. tool culture is #ositive in +rst wee(
C. *iter against the 9 antigen ofgreater than 1-20 is negative
'. *iter against the antigen ofgreater than 1630 is consi!ere!
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1@. Which of the following is not trueabout ibrio cholerae
A. comma&sha#e!, curve! ro! 2F3 Hmlong
B. activel% motile b% means of a #olar5agellum
C. grows well on *CB which #ro!uces%ellow 7sucrose fermente!8
'. grows at a ver% low # 7-.&3.8
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20&23. Which of the biochemicalcharacteristics are consistent withibrio cholera Choose
20. Catalase 7ositiveENegative8
21. 9"i!ase 7ositiveENegative8
22. $n!ole 7ositiveENegative8
2-. Nitrate re!ucers7ositiveENegative8
23. ucrose fermenterositive Ne ative
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2. ibrio cholerae enteroto"in
A. $ncreases the levels of intracellularc%clic G)
B. eat&resistant enteroto"inconsisting of subunits A,B,C
C. Causes continue! activation ofa!en%late c%clase
'. $nhibits the enI%me#hos#ho!iesterase
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26. Which of the following statementsregar!ing . aeruginosa is false
A. Gram 7&8, Aerobic, motile bacilli with
#olar 5agellaB. growth at 32:C hel#s !ierentiate it
from other seu!omonas s#ecies
C. ro!uces the 5uorescent bluish#igment #%oc%anin
'. )an% strains of aeruginosa also
#ro!uce the 5uorescent #igment
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2;. emorrhagic necrosis of s(incause! b% . aeruginosa is calle!
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2?. Which of the following statements isEare trueregar!ing =ersinia #estis
A. ro!uce! #an!emics of Jblac( !eathK
with millions of fatalities
B. Associate! with #neumonic #lague transmitte! b%aerosol
C. o!ents to o!ents transmission
'. o!ents to uman transmission b% the bite of5eas
>. Wil! ro!ents are natural reservoirs of #lague
/. All of the Above
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2@. What is the characteristic stainingof =. #estis with s#ecial stains such asWright, Giemsa, Wa%son, or
meth%lene blue
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-0&-2
-0
-1
-2
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--. Which of the following statement is trueregar!ing B. #ertussis
1. Gram&negative coccobacilli
2. Ca#sule #resent-. AerobicL 9"i!ase 7M8L Catalase 7M8
3. Nitrate 7&8L Drea7&8L Citrate7&8
A. 1,2,-, an! 3 are correct
B. 1,2, an! - are correctC. 1 an! 2 are correct
'. 9nl% 1 is correct
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What is the other name for Bor!et&Gengou me!ium 7-3. $!entif%8 whichcontains 7-. $!entif% the antibiotic8
owever, a charcoal&containingme!ium su##lemente! with horsebloo!, ce#hale"in, an! am#hotericin
B 7-6. $!entif% the 9ther name8 is#referable because of the longer shelflife
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-;. Gram stain of Cam#%lobacter eunishowing
7$!entif% J"""""K or J"""" """"K8Fsha#e! gram&negative bacilli
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-?. 'ar(&+el! or #hase contrastmicrosco#% ma% show the t%#ical7$!entif%JKK motilit% of the
organisms.
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-@. A chil! was !iagnose! to besuering from !iarrhea !ue to
Cam#%lobacter euni. Which of thefollowing will be the correctenvironmental con!itions of incubation
of culture #lates of the stool A. *em#erature of 32:C, 3< 92, 1< C92
B. *em#erature of 32:C, < 92, 10< C92
C. *em#erature of -;:C, 3< 92, 1< C92
'. *em#erature of -;:C < 92, 10< C92
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30. Which of the following correctl%!escribe . #%lori
A. Gram negative cocci curve!
B. Gram negative cocci straight
C. Gram negative motile bacilli s#iralro!
'. Gram negative bacilli straight
>. Gram negative motile bacilli
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outine )e!ia
31. What is consi!ere! a #ositive resultof )acCon(e% Agar
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32&3- Give at least 2 actosefermenters enterobacteriaceae
33&36 Giver at least - Non actosefermenters enterobacteriaceae
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3;. What is a #ositive result of in!oletest
3?. What reagent is a!!e! intotr%#to#hane broth after incubation of-; C for 23 hours
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)eth%l e!&oges ros(auer*est
3@. Which organism will %iel! )#ositive test result Choose >.aerogenes E >.coli
0. Which organism will %iel! #ositive test result Choose >.aerogenes E >.coli
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1. Citrate test #ositive
>.coliEO.#neumoniae
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Bonus