Common Gram Negative Bacteria

7/26/2019 Common Gram Negative Bacteria

1/38

Common Gram Negative

BacteriaAug. 2, 2016


2/38

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


3/38

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


4/38

-. 'ierentiation of N. gonorrhea an!N. meningiti!is can be !one b%

A. Glucose /ermentation

B. eaction

C. )altose /ermentation

'. $n!ole *est


5/38

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


6/38

. 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


7/38

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


8/38

;. 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


9/38

?. >*>C


10/38

@. >>C


11/38

10. >>C


12/38

11. What is the causative agent ofgranuloma inguinale


13/38

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


14/38

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


15/38

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


16/38

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


17/38

16 &1;. 9n Wilson F Blair bismuthsul#hite me!ia . t%#hi #ro!uce

colonies !ue to

#ro!uction of


18/38

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!


19/38

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


20/38

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


21/38

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


22/38

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


23/38

2;. emorrhagic necrosis of s(incause! b% . aeruginosa is calle!


24/38

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


25/38

2@. What is the characteristic stainingof =. #estis with s#ecial stains such asWright, Giemsa, Wa%son, or

meth%lene blue


26/38

-0&-2

-0

-1

-2


27/38

--. 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


28/38

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


29/38

-;. Gram stain of Cam#%lobacter eunishowing

7$!entif% J"""""K or J"""" """"K8Fsha#e! gram&negative bacilli


30/38

-?. 'ar(&+el! or #hase contrastmicrosco#% ma% show the t%#ical7$!entif%JKK motilit% of the

organisms.


31/38

-@. 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


32/38

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


33/38

outine )e!ia

31. What is consi!ere! a #ositive resultof )acCon(e% Agar


34/38

32&3- Give at least 2 actosefermenters enterobacteriaceae

33&36 Giver at least - Non actosefermenters enterobacteriaceae


35/38

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


36/38

)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


37/38

1. Citrate test #ositive

>.coliEO.#neumoniae


38/38

Bonus

Documents

Common Gram Negative Bacteria