Part One Microbiology

[foxydentist]

---

Members do not see this ad.

Hey guys I thought of arranging the forum a bit by making a thread for each section for NBDE part one.... so if any body got any questions or need help in or got new useful infromation wana share in Microbiology writes here......... 🙂 hope that would make it easy for everybody planning to take part one soon .. (like me 😳 )

 

[confused tooth]

This is neat foxy 🙂

 

[foxydentist]

Thanks,, but I hope everybody gona write any useful info. for Microbiology 🙂

 

[vibes-98]

Thanks,, but I hope everybody gona write any useful info. for Microbiology 🙂

good job

 

[foxydentist]

hey,,, this might be basic......
Could anyone explain 4 me.... in Genetic Tansfer...... Transduction,,,,, ??? the Generalized and Specialized....... I read thm in Kaplan Review book and im a bit confused.... could anyone just tell me a breif explnation.,,, wats the generalized and wats the specialized..?
Thanks

 

[bubbly]

😕
hi guys ! i m gonna start studying for the part 1 exam .. so b4 i start i 'd like to confirm what topics/syllabus i sud study.. i went thru ada.org and i found this
http://www.ada.org/prof/ed/testing/n...ifications.pdf

is this enuf or do we have to study some other topics as well .. if yes then where can i get them ?
😕

 

[wireless_doc]

How does miliary TB spread?
The key says bloodstream while the decks say lymphatics. Does anyone have another source to confirm? Thanks.

 

[amrita1]

How does miliary TB spread?
The key says bloodstream while the decks say lymphatics. Does anyone have another source to confirm? Thanks.

hi
illoked through internet surfing,all the sites say that miliary tuberculosis is by haematogenous spread(blood)

 

[Ruchig]

I studied that from BRS pathology and it says milary tuberculosis spread by blood.

hi
illoked through internet surfing,all the sites say that miliary tuberculosis is by haematogenous spread(blood)

 

[wireless_doc]

Thanks for confirming.

 

[wireless_doc]

Uncomplicated healing of a wound by secondary intention, observed microscopically at three days is MOST likely to show evidence of ...
Answer: Ulceration of the epithelial surface.

The decks say ulceration is a chracteristic of healing by third intention. Can someone please confirm? Thanks.

 

[tooth germ]

hi,
what are the contents of mast cell granules?
please answer

 

[swetha_dentist]

hi,
what are the contents of mast cell granules?
please answer

histamin i suppose

 

[tooth germ]

hi,
thanks for ur help,
granules of mast cell contains
neutral proteases (tryptase,chymase)
histamine
proteoglycan(heparin,chondritin sulfate)
if iam wrong please correct me.

histamin i suppose

 

[mouth mirror]

thanks ruchig & mam6701e...but what is the ans for a? anyone else?

 

[dentist33]

gram positive facultative cocci ( streptocci are cocci) and filamentous(actinomtces) are of normal oral flora the correct ans is gram negetive anaerobic rods and fusobacterium

 

[wireless_doc]

Which of the following is the MOST common location for an atherosclerotic induced aneurysm?
A. Thoracic aorta
B. Abdominal aorta
C. Coronary arteries
D. Arch of the aorta
E. Common iliac arteries

I looked it up but could not find which portion of the aorta. Does anyone know? Thanks.

 

[Ruchig]

Does ging sulcus flora means subgingival? (then it can be negetive anaerobic rods and fusobacterium). Otherwise healthy flora is gram positive facultative cocci and filamentous.

gram positive facultative cocci ( streptocci are cocci) and filamentous(actinomtces) are of normal oral flora the correct ans is gram negetive anaerobic rods and fusobacterium

 

[Ruchig]

I read it somewhere the answer is B but I dont know the reason.

Which of the following is the MOST common location for an atherosclerotic induced aneurysm?
A. Thoracic aorta
B. Abdominal aorta
C. Coronary arteries
D. Arch of the aorta
E. Common iliac arteries

I looked it up but could not find which portion of the aorta. Does anyone know? Thanks.

 

[dentist33]

same here even i read it some where dont realy remember it said abdominal aorta .... but i aint sure ..can some one conform this

 

[wireless_doc]

Sound good to me. I'll take abdominal aorta. Thanks.

 

[mam6701e]

I read it somewhere the answer is B but I dont know the reason.

agree, abdominal aorta (100% sure)

 

[wireless_doc]

45. A bone lesion with radiopaque structures radiating from the periphery suggests which of the following
A. Osteosarcoma
B. Osteoblastoma
C. Multiple myeloma
D. Giant cell tumor
E. Osteitis deformans

I'm between A and C.

55. An 18 yrs male patient sustains a compound fracture of the femur. 24 hours later the fragments are manipulated in order to better align before splinting The patient dies suddenly. The most likely reason for his sudden death is
A. hypovolumic shock
B. myocardial infarction
C. fat embolism
D. pulmonary thromboembolism
E. air embolism

C sounds most fit. But I don't have a reason for it.

59. Vasodilation and increased vasopermeability lasting for several days in an area of inflammation indicate which of the following?
A. Thrombosis
B. Release of bradykinin
C. Hageman factor activation
D. Formation of granulation tissue
E. Endothelial cell damage and disruption

The description fits B, but I read that bradykinin works similarly to histamine which only has effect during acute inflammation.

What do you think? Thanks.

 

[dentist33]

45 ans is osteosarcoma also refered as sun blast appearance on radiologic view
55 is fat embolism, most common after a long or big bone fracture which is fatal
59 hegeman factor , had lot off discussion on this refer to open question to all thread , because hegmen also releases kilikrein which further releases brady .
pls do tell if wrong

 

[Ruchig]

45. A bone lesion with radiopaque structures radiating from the periphery suggests which of the following
A. Osteosarcoma
B. Osteoblastoma
C. Multiple myeloma
D. Giant cell tumor
E. Osteitis deformans
A as osteosarcoma has sun rays appearance

55. An 18 yrs male patient sustains a compound fracture of the femur. 24 hours later the fragments are manipulated in order to better align before splinting The patient dies suddenly. The most likely reason for his sudden death is
A. hypovolumic shock
B. myocardial infarction
C. fat embolism
D. pulmonary thromboembolism
E. air embolism
Fat emblosim is seen in fractures.

 

[wireless_doc]

45 ans is osteosarcoma also refered as sun blast appearance on radiologic view
55 is fat embolism, most common after a long or big bone fracture which is fatal
59 hegeman factor , had lot off discussion on this refer to open question to all thread , because hegmen also releases kilikrein which further releases brady .
pls do tell if wrong

You're right about the relation between Bradykinin and H factor. But the description fits exactly what bradykinin does. That was why I didn't think about the H factor as the major cause. Thanks for replying (you too, Ruchig🙂

 

[mouth mirror]

You're right about the relation between Bradykinin and H factor. But the description fits exactly what bradykinin does. That was why I didn't think about the H factor as the major cause. Thanks for replying (you too, Ruchig🙂

but why not endothelial cell damage & disruption ?? pls explain.thnx.

 

[mam6701e]

but why not endothelial cell damage & disruption ?? pls explain.thnx.

yeah why not?...........
the answ could be one of those two: hageman factor
and endothelial cell damage

 

[snigdha007]

1st one ....osteosarcoma
2.fat embolism
3.endothelial cell damage and disruption

 

[tulaja]

Which of the following is the MOST common location for an atherosclerotic induced aneurysm?
A. Thoracic aorta
B. Abdominal aorta
C. Coronary arteries
D. Arch of the aorta
E. Common iliac arteries

I looked it up but could not find which portion of the aorta. Does anyone know? Thanks.

i find this helpful ,
Aneurysms can occur anywhere where there is a blood vessel, although they are most common in arteries. Most non-intracranial aneurysms (95%) arise distal to the origin of the renal arteries at the infrarenal abdominal aorta, a condition mostly caused by atherosclerosis. The thoracic aorta can also be involved. One common form of thoracic aortic aneurysm involves widening of the proximal aorta and the aortic root, which leads to aortic insufficiency. Aneurysms occur in the legs also, particularly in the deep vessels (e.g., the popliteal vessels in the knee).

 

[mouth mirror]

1.Immune serums showing high agglutination titers often fail to agglutinate homologous bacteria in low dilution. This is designated as:

a. the prozone
b. the opsonic index
c. an Arthus reaction
d. agglutination adsorption
e. the Bordet-Gengou phenomenon

2.at which stage in the process of gene cloning are restriction endonucleases used ?
a.isolation of mRNA
2.synthesis of ds cDNA
3.insertion of cDNA into vector DNA
4.expression of cloned gene by bacteria
5.introduction of recombinant DNA into a bacterial cell
thnx

 

[swetha_dentist]

2.at which stage in the process of gene cloning are restriction endonucleases used ?
2.synthesis of ds cDNA.i think this is the answer.correct me if i am wrong

 

[foxydentist]

hey guys
I wana ask,,, NBDE part one review book,,, is it enough to study Microbiology???
thnkz

 

[confused tooth]

Which of the following represents complication of the peptic ulcer that accounts for majority of the deaths
1.Bleeding
2. Perforation
3. Obstruction
4. malignancy

I checked everywhere, 1-3 are the complications but not the cause of death........anybody any idea @ this?

Thanks in advance.....

Ct

 

[swetha_dentist]

Which of the following represents complication of the peptic ulcer that accounts for majority of the deaths
1.Bleeding
2. Perforation
3. Obstruction
4. malignancy

I checked everywhere, 1-3 are the complications but not the cause of death........anybody any idea @ this?

Thanks in advance.....

Ct

perforationa cause peritonitis -death but i remeber bleeding is a cause not sure though

 

[confused tooth]

thanks swetha.......one more question.......

During which of the stages of viral replication, would a virus be suseptible to secretory IgA
1. Eclipse
2. Attachment
3. Maturation
4. Viral protein synthesis
5. Viral nucleic acid synthesis

I would opt for 2. attachment...........since that is the function of IgA, to prevent attachment of antigens to mucosal surfaces...... anybody second opinion on this or any other explainable answer?

CT
any body

 

[himal]

answer is attachment

 

[confused tooth]

thanks himal

 

[dr.sal]

THESE VEDEOS REALLY HELPED ME ...FOR MICRO THOUGHT I D SHARE IT

http://media.med.sc.edu/video_index/index.php?course=microbiology2006&category=bacteriology

 

[manish19]

hey guys
I wana ask,,, NBDE part one review book,,, is it enough to study Microbiology???
thnkz

thats enough but do as many q as possible with explanation

 

[schanzi]

Which of the following is the MOST common location for an atherosclerotic induced aneurysm?
A. Thoracic aorta
B. Abdominal aorta
C. Coronary arteries
D. Arch of the aorta
E. Common iliac arteries

I looked it up but could not find which portion of the aorta. Does anyone know? Thanks.

95% of the atherosclerotic aorta-aneurysms occur in the abdominal part (Roche LExicon), so I would presume B is correct. Could not find info about C and D either, sorry.

 

[era]

hey guys
I wana ask,,, NBDE part one review book,,, is it enough to study Microbiology???
thnkz

hello,i am new comer to canada and i have to give ndeb part1 .can you please make group study so that we can study and discus things.

 

[habab]

hi guys someone help in these qu.
what's the lyme disease???

 

[drmon]

hi guys someone help in these qu.
what's the lyme disease???

Lyme disease is caused by the bacterium Borrelia burgdorferi and is transmitted to humans by the bite of infected blacklegged ticks. Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. If left untreated, infection can spread to joints, the heart, and the nervous system. Lyme disease is diagnosed based on symptoms, physical findings (e.g., rash), and the possibility of exposure to infected ticks; laboratory testing is helpful in the later stages of disease. Most cases of Lyme disease can be treated successfully with a few weeks of antibiotics. Steps to prevent Lyme disease include using insect repellent, removing ticks promptly, landscaping, and integrated pest management. The ticks that transmit Lyme disease can occasionally transmit other tick-borne diseases as well.

 

[deepa k]

q] if the anticodon on t-rna is 5'ACG3' , then which of the following is its corressponding codon on m-rna???
5' CGT 3'
5' CGU 3'
5'TGC 3'
5' UAG 3'
5' UGC 3'
plzz give the explanation 2 this... how can we solve these type of questions
really confused

 

[confused tooth]

q] if the anticodon on t-rna is 5'ACG3' , then which of the following is its corressponding codon on m-rna???
5' CGT 3'
5' CGU 3'
5'TGC 3'
5' UAG 3'
5' UGC 3'
plzz give the explanation 2 this... how can we solve these type of questions
really confused

answer is 5' CGU 3'

How I remember this:
1. 5 prime always pairs with 3 prime. (its always opposite)
2. A-T , C-G in DNA and A-U in RNA

Now look at the question:- t-rna is 5' ACG 3' , so begin with 3' UGC 5' (just pair it up according to the rules)
Now look for the same sequence:- adjacent to 3 you need to have U
and adjacent to 5 you need to have C
so the correct answer is : 3' UGC 5' which is given as a choice 5' CGU 3' here.

Usually we get confused between the choices 2)5' CGU 3' ANS 5) 5' UGC 3'
But if you look closely in choice 5 .... adjacent to 5 prime is U and adjacent to 3 prime is C, which is exactly opposite of what we want as answer.

Hope this explanation helps.....

Good Luck,
Ct

 

[deepa k]

hey thanks.. good explanation .. i hope i can answer such questions now..

 

[PLANT]

q:Which of the following agents is most most aften associated with fatalaties following influenza infection??
A Influenza virus
B St.Mitis
C St.Pyogens
D St.Aureus
E Hemophilus influenza

this is q84 q.paper 1984..

 

[deepa k]

proteins serve as each ofthe following except
1. oxygen carriers
2. hormones
3. catalysts
4. structural elements
5. carriers of genetic information


if estradiol is synthesized from cholestrol then where should it have its receptors ? on the cytoplasmic membrane or the nuclear receptors .

plz post the answers with explanation . thanks in advance
regards

 

[deepa k]

Basic principles for DNA sequencing by Sanger procedure is derived from:

a. translation
b.transcription
c.replication
d. reverse transcription