Why Lyme disease Relapses? - USMLE Forums
USMLE Forums Logo
USMLE Forums         Your Reliable USMLE Online Community     Members     Posts
Home
USMLE Articles
USMLE News
USMLE Polls
USMLE Books
USMLE Apps
Go Back   USMLE Forums > USMLE Step 1 Forum

USMLE Step 1 Forum USMLE Step 1 Discussion Forum: Let's talk about anything related to USMLE Step 1 exam


Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 09-21-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 15
Threads: 2
Thanked 1 Time in 1 Post
Reputation: 11
Question Why Lyme disease Relapses?

Hi guys

I saw a question in NBME 6 asking about lyme disease (tick bite+a picture of a spirochete) asking why it relapses few days after the fever subsides.
I answered it saying that it's when borrelia migrates to blood stream (which is the same as what I found on the internet), but it turned out wrong. any idea what it might be?

Thanks
Reply With Quote Quick reply to this message



  #2  
Old 09-21-2011
jahn77's Avatar
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 326
Threads: 20
Thanked 220 Times in 124 Posts
Reputation: 232
Default

I slipped that question and found the answer as - relapsing fever -antigenic variation
Reply With Quote Quick reply to this message
The above post was thanked by:
farawlababy (09-22-2011)
  #3  
Old 09-21-2011
whocares13's Avatar
USMLE Forums Addict
 
Steps History: Step 1 Only
Posts: 145
Threads: 8
Thanked 76 Times in 57 Posts
Reputation: 86
Default

Quote:
Originally Posted by farawlababy View Post
Hi guys

I saw a question in NBME 6 asking about lyme disease (tick bite+a picture of a spirochete) asking why it relapses few days after the fever subsides.
I answered it saying that it's when borrelia migrates to blood stream (which is the same as what I found on the internet), but it turned out wrong. any idea what it might be?

Thanks
It is due to antigenic variation. When borrelia is in blood, antibodies come to attach and remove it, but it changes its surface protein and so antibodies don't recognize it and borrelia can still proliferate causing relapsing fever.

Hope it helps you.
Reply With Quote Quick reply to this message
The above post was thanked by:
Amenah (09-22-2011), autumn (09-23-2011), DocSikorski (09-22-2011), docusmle9 (09-23-2011), farawlababy (09-22-2011), rulz (09-23-2011), sumedha (09-23-2011), vishalmethre (09-22-2011)
 
  #4  
Old 09-22-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 15
Threads: 2
Thanked 1 Time in 1 Post
Reputation: 11
Default

Thank you so much guys!
Do you mind if I have some more questions from the same form?


I will go through nbme other forms soon so will have some more questions coming on

Thanks again
Reply With Quote Quick reply to this message
The above post was thanked by:
Amenah (09-22-2011)
  #5  
Old 09-23-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 15
Threads: 2
Thanked 1 Time in 1 Post
Reputation: 11
Default nbme 11

ok, so here is some questions i saw on nbme11 (paraphrased)

1. which tendon is used to repair flexor carpi radialis tendon in wrist injuries as the functional loss will be insignificant:

A. Flexor carpi ulnaris
B. Flexor digitorum profundus
C. Flexor digitorum superficialis
D. Palmris longus
E. Pronator teres

2. 35 year old woman with Crohn's disease and enterovesical fistula, this finding is mainly to inflammatory-associated changes in the integrity of which of the epithelial elements

A. adherens junctions
B. Basement membrane
C. Desmosomes
D. Gap junctions
E. Tight junctions

3. 22 year old man with 1 year history of progressive numbness in the arms, recently burned his thumb but did not feel it. Sensation for pain and temperature is decrease in upper limbs, shoulders, and neck, but normal elsewhere, the lesion is in which of the spinal cord sections:

A. Anterior white commissure
B. Dorsal column
C. Interomedial cell column
D. Lateral corticospinal tract
E. Spinothalamic tract

(note: I chose E but for some reason it turned out to be wrong, don't know why)

Any ideas?
Reply With Quote Quick reply to this message
  #6  
Old 09-23-2011
jahn77's Avatar
USMLE Forums Guru
 
Steps History: Step 1 Only
Posts: 326
Threads: 20
Thanked 220 Times in 124 Posts
Reputation: 232
Thumbs Down

Quote:
Originally Posted by farawlababy View Post
ok, so here is some questions i saw on nbme11 (paraphrased)

1. which tendon is used to repair flexor carpi radialis tendon in wrist injuries as the functional loss will be insignificant:

A. Flexor carpi ulnaris
B. Flexor digitorum profundus
C. Flexor digitorum superficialis
D. Palmris longus
E. Pronator teres

2. 35 year old woman with Crohn's disease and enterovesical fistula, this finding is mainly to inflammatory-associated changes in the integrity of which of the epithelial elements

A. adherens junctions
B. Basement membrane
C. Desmosomes
D. Gap junctions
E. Tight junctions

3. 22 year old man with 1 year history of progressive numbness in the arms, recently burned his thumb but did not feel it. Sensation for pain and temperature is decrease in upper limbs, shoulders, and neck, but normal elsewhere, the lesion is in which of the spinal cord sections:

A. Anterior white commissure
B. Dorsal column
C. Interomedial cell column
D. Lateral corticospinal tract
E. Spinothalamic tract

(note: I chose E but for some reason it turned out to be wrong, don't know why)

Any ideas?


It is not acceptable to publish NBME questions here.
Please do not do it!!!

The thread was just about concept of question, not actual one.
With posting questions you harm to future NBME takers - as it leads to false correct answers.

Thank you for understanding.
Reply With Quote Quick reply to this message
  #7  
Old 09-23-2011
USMLE Forums Scout
 
Steps History: Not yet
Posts: 15
Threads: 2
Thanked 1 Time in 1 Post
Reputation: 11
Default

Well, I'm sorry if it came out this way, I'm just inquiring about the ones that I can't find answers for in the books or over the internet, nor could I find a friend who knows the answer. This was my last resort. Forum administrators can remove it any how.
Reply With Quote Quick reply to this message
  #8  
Old 09-23-2011
whocares13's Avatar
USMLE Forums Addict
 
Steps History: Step 1 Only
Posts: 145
Threads: 8
Thanked 76 Times in 57 Posts
Reputation: 86
Default

check this It's not allowed to post NBME Questions
Reply With Quote Quick reply to this message



Reply

Tags
Microbiology-

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the USMLE Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Medical School
Choose "---" if you don't want to tell. AMG for US & Canadian medical schools. IMG for all other medical schools.
USMLE Steps History
What steps finished! Example: 1+CK+CS+3 = Passed Step 1, Step 2 CK, Step 2 CS, and Step 3.

Choose "---" if you don't want to tell.

Favorite USMLE Books
What USMLE books you really think are useful. Leave blank if you don't want to tell.
Location
Where you live. Leave blank if you don't want to tell.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Associated disease step_enhancer USMLE Step 2 CK Forum 8 09-08-2012 06:30 AM
Lyme Disease Complications! Evergreen USMLE Step 1 Forum 3 07-06-2012 10:26 AM
headache in lyme...CNS lyme or not...amoxy or ceftriaxone ? tyagee USMLE Step 2 CK Forum 6 06-23-2012 05:07 PM
do we need to give post exposure prophylaxis to lyme kemoo USMLE Step 2 CK Forum 2 07-06-2011 09:40 PM
Lyme prophylaxis? Protecting what! kemoo USMLE Step 2 CK Forum 5 05-22-2011 01:05 PM

RSS Feed
Find Us on Facebook
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

USMLE® & other trade marks belong to their respective owners, read full disclaimer
USMLE Forums created under Creative Commons 3.0 License. (2009-2014)