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ID Exam 3
Infectious Arthritis
22
Biology
Undergraduate 2
11/06/2012

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Term
definition of infectious arthritis
Definition
infection of joint space
Term
what is the most common type
Definition
gonococcal
Term
which type is more common in males?
femlaes?
Definition
non gonococcal
gonococcal
Term
most IA is _
Definition
monoarticular
Term
most common is age is above _
children account forr -%
Definition
16
25
Term
pathophys of IA
Definition
bacteria invade the synovial space
attach to synovium and cartiledge
hyperplasia of synovium
release of inflamm cells and proteolytic enzymes
joint space is perfect for this infection and damage
Term
routes of infection for IA
Definition
hematogenous
contiguous
direct innoculation
Term
what is the most common form of IA
Definition
hematogenous
Term
what defined the direct innoculation for IA
Definition
directly from wound or surgery
Term
what type of route is an arthroscopy
Definition
direct innoculation
Term
what % of children have no predisposing factors
Definition
45
Term
what are the diseases that predispose you for IA
Definition
diabetes, cancer, SLE, renal failure, sickle cell
Term
4 points about nongonococaal
Definition
1- monoarticular (mostly knee)
2- mild fever
3-tenderness w/ or w/o erythema
4- joint effusions
Term
what is the synovial WBC for nongonococaal?
gonococcal
Definition
>100,000
50,000
Term
which type has raised WBCs in 50%?
which is fr pediatric patients?
Definition
gonococcol
nongonococcal
Term
4 points for gonococcal
Definition
1- 50% are migratory polyarticular
2- hgih fever
3- tenosynovitis
4- dermitis
Term
what is the best culture for nongonococcal
Definition
joint fluid
Term
what is the best culture for gonococcal
Definition
genitourinary culture
Term
if you have chlamydia what shoudl you also be given
Definition
Zithromax 1 gm PO
Doxycycline ( 100mg BID for 7 days)
Term
non deug treatments
Definition
joint drainage
joint rest
Term
what is the med of choice for gonococcal
Definition
ceftriaxone
Term
what oral meds may be used in gonococcal
Definition
amoxil, doxycycline, tetracycline
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