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Rheumatology > Infectious Arthritis > Flashcards

Infectious Arthritis Flashcards

1
Q

Diagnostic test for Lyme disease

A

ELISA and western blot analysis

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2
Q

First line treatment for Lyme disease in adults and children

A 
Adults = doxycycline
Children = amoxicillin
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3
Q

Most common organism to cause septic arthritis in those with RA

A

Staphylococcus aureus

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4
Q

Pott’s disease is infectious arthritis due to what?

A

Tuberculosis

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5
Q

Clarity of joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = translucent
Noninflammatory = translucent
Inflammatory = translucent/opaque
Septic = opaque
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6
Q

Most common joint involved in septic arthritis

A

Knee

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7
Q

If there is gas formation in joint space and septic arthritis is suspected, what 2 bacteria do you suppose is involved?

A

E. Coli or C. Perfringens

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8
Q

PMN% joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = <25
Noninflammatory = <25
Inflammatory = >50
Septic = >85
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9
Q

WBC in joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = <200
Noninflammatory = <5000
Inflammatory = 1000 - 75000
Septic = >100,000
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10
Q

What pattern of arthritis is seen in Lyme disease

A

Migratory episodes of polyarthritis

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11
Q

Glucose in joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = equal to blood
Noninflammatory = equal to blood
Inflammatory = <50 lower than blood
Septic = >50 lower than blood
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12
Q

Skin manifestation seen in Lyme disease

A

Erythema migrans

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13
Q

Color joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = colorless
Noninflammatory = straw
Inflammatory = yellow
Septic = turbid-yellow
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14
Q

What nerve palsy is seen in Lyme disease?

A

Facial nerve palsy

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15
Q

Most common organism involved in septic arthritis in adults? In neonates? In children 6 mths - 2 years? In children > 2yo?

A

Adults = Neisseria gonorrhea
Neonates = Staphylococcus aureus and Group B Strep
6mths - 2 years = H. Influenza
>2yo = staphylococcus aureus and Group B Strep

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16
Q

Viscosity joint fluid analysis seen in normal, noninflammatory, inflammatory and septic arthritis

A 
Normal = high
Noninflammatory = high
Inflammatory = low
Septic = variable

Rheumatology (12 decks)

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