most common cause of infection

Discussion in 'Step I' started by obiwan, Jun 15, 2008.

  1. obiwan

    obiwan Junior Member

    Joined:
    Mar 26, 2006
    Messages:
    683
    Likes Received:
    44
    Status:
    Attending Physician
    that results from indwelling catheters?

    I wanna say e.coli but not 100% sure
     
  2. Thread continues after this sponsor message. SDN Members do not see this ad.

  3. agranulocytosis

    Joined:
    Sep 22, 2007
    Messages:
    552
    Likes Received:
    27
    Status:
    Fellow [Any Field]
    I believe it's S. epidermidis.
     
  4. wmc24

    Joined:
    Jan 13, 2008
    Messages:
    151
    Likes Received:
    0
    Status:
    Medical Student
    i think its staph most commonly. staph epi maybe?
     
  5. -Goose-

    Joined:
    Jul 7, 2005
    Messages:
    1,728
    Likes Received:
    9
    Status:
    Resident [Any Field]
    staph epi or staph aureus?
     
  6. luhando

    luhando Senior Member

    Joined:
    Apr 26, 2006
    Messages:
    241
    Likes Received:
    0
    Status:
    Medical Student
    staph epi im pretty sure

    it forms biofilms on medical equipment that is normally made so bacteria cant stick. i forgot why but for some reason staph epi can stick to and make thin films (colonies) of bacteria on catheters and such.
     
  7. Mr. Freeze

    Mr. Freeze Not right. (in the head)

    Joined:
    Apr 22, 2005
    Messages:
    1,355
    Likes Received:
    2
    Status:
    Resident [Any Field]
    Depends on what type of catheter, que no?
     
  8. The Angriest Bird

    Joined:
    Sep 24, 2007
    Messages:
    422
    Likes Received:
    5
    Status:
    Resident [Any Field]
    First Aid 2008 Page 174: Nosocomial Infections:

    Urinary catheterization: E. coli, Proteus
     
  9. SOUNDMAN

    SOUNDMAN Senior Member

    Joined:
    May 16, 2004
    Messages:
    941
    Likes Received:
    2
    Status:
    Resident [Any Field]
    Staph epi, bio film, prosthesis, catheters (lines) etc. Unless you are talking about Foley Catheter, then E. coli.
     
  10. airmonkey84

    Joined:
    Jun 10, 2008
    Messages:
    21
    Likes Received:
    1
    It's E. coli...catheterization or not. Staph epi is second most common and is more specific to catheterization. However, E. coli is still most common because its native to the vaginal canal.

    I remember one specific question about a woman who kept getting UTIs after having sex with her husband. The question asked how she could avoid getting UTIs and the answer was if she voided more often after sex. She was getting E. coli UTIs...think of a cath as similar to a penis in a vagina.
     
  11. GynGuy1983

    GynGuy1983 C&A Psychiatry Fellow

    Joined:
    Jun 13, 2008
    Messages:
    138
    Likes Received:
    18
    Status:
    Fellow [Any Field]
    It really depends on the site of the catheter, as in Foley or central venous. Venous is s. epidermidis/S. aureus (both are normal microbial flora of the skin, but S. epi is probably the cause due to biofilm ). As for Foley catheters, E. coli is usually #1.

    As for the husband who kept giving his wife a UTI, Airmonkey84, I highly doubt that the answer choice would include E. coli, but the testers would most likely want you to pick S. saprophyticus. Think about a sexually active female with recurrent UTI's, 2nd most common cause, I can see them testing that, or maybe the fact that she's suffering from improper voiding and has cystitis.
     
  12. airmonkey84

    Joined:
    Jun 10, 2008
    Messages:
    21
    Likes Received:
    1
    I misinterpreted...sorry thought you were talking about urinary catheters. If it's urinary catheters then its E. coli. If it's a venous cathether then Gynguy is right.

    I'm pretty sure that E. coli is still the most common cause in sexually active women though.
     
  13. GynGuy1983

    GynGuy1983 C&A Psychiatry Fellow

    Joined:
    Jun 13, 2008
    Messages:
    138
    Likes Received:
    18
    Status:
    Fellow [Any Field]
    That it is, but S. saprophyticus is #2, and I think they would want to test whether or not you know that there could be another cause, otherwise, E. coli would be the MCC of UTI in everyone all the time. Where's the fun in testing that?

    "[FONT=verdana, arial, helvetica, sans-serif]In vitro susceptibility testing showed almost uniform sensitivity of S. saprophyticus to most antimicrobials used to treat UTIs, but recurrent infections occurred in six of the 72 women despite adequate therapy. Physicians and microbiologists must be aware that S. saprophyticus is an important cause of UTIs in young women."

    http://jama.ama-assn.org/cgi/content/abstract/250/22/3063
    .
     
  14. obiwan

    obiwan Junior Member

    Joined:
    Mar 26, 2006
    Messages:
    683
    Likes Received:
    44
    Status:
    Attending Physician
    For that question, i think i put voiding but i know i was contemplating douching as the choice.
     
  15. Mr. Freeze

    Mr. Freeze Not right. (in the head)

    Joined:
    Apr 22, 2005
    Messages:
    1,355
    Likes Received:
    2
    Status:
    Resident [Any Field]
    Was "have buttsechs only" an answer choice? That'd solve it.

    "Sorry honey; doctor's orders..."
     
  16. Thread continues after this sponsor message. SDN Members do not see this ad.

  17. GynGuy1983

    GynGuy1983 C&A Psychiatry Fellow

    Joined:
    Jun 13, 2008
    Messages:
    138
    Likes Received:
    18
    Status:
    Fellow [Any Field]
    That's what I would have put also, or perhaps the vignette had something that would have given a clue about some meds that she took that could cause urinary retention like H1 blockers.
     
  18. 45408

    45408 aw buddy

    Joined:
    Jun 13, 2004
    Messages:
    16,980
    Likes Received:
    40
    Status:
    Resident [Any Field]
    You're married. I'm pretty sure you know the answer to that one. :D
     

Share This Page