Etiology/Pathophysiology
Most common organism that causes erysipelas
Streptococcus pyogens
Pt presents with a herold Patch and Christmas tree pattern maculopapular rash. What is your suspected diagnosis?
Pityriasis rosea
How do you differentiate between chancre and chancroid?
chancre- painless
chancroid- painful
What is your diagnostic test to differentiate between MSSA and MRSA cellulitis?
Pt presents with erysipeloid. What is your treatment of choice?
PCN G
This organism causes Cat Scratch Disease from a cat scratch or bite
Bartonella Henselea
Pt presents with high fever, vomiting, watery diarrhea, diffuse macular erythematous rash and non-purulent conjunctivitis, desquamation of palms/soles. What is your suspected diagnosis?
Toxic-shock syndrome
Pt presents with what you suspect cellulitis. You have yet to receive the culture results. What are two things on your differential diagnosis?
-Necrotizing fasciitis
-DVT
-Venous insufficiency
Gram - rod with bipolar "safety pin" staining makes you think of what diagnosis
Plaque
Pt presents with cellulitis in the clinic. You make a line of demarcation and tell them to return to clinic in 24 hours. When they return, you see the erythema has spread past the line of demarcation. What is your next best step?
ADMIT THEM
Treponema Pallidum
What is centor's criteria?
Must have at least 2+
Temp > 38 C
Tender anterior cervical adenopathy
Lack of cough
Pharyngotonsillar exudate
A Pt presents with a rash on their palms and soles. What are three diseases that are on your differential diagnosis?
-Coxsackie (HFM)
-RMSF (esp wrists)
-syphilis (secondary)
-Janeway lesions
-Kawasaki
-measles
-toxic shock syndrome
-reactive arthritis (keratoderma blenorrhagica)
-meningiococcemia
PCR
Treatment of choice in immunocompromised patients with CMV
Ganciclovir
This infectious disease is most commonly seen in farmers that are around contaminated soil
Whipples disease
Organism: Tropheryma whipplei
uvetitis, urethritis, arthritis (can't see, can't pee, can't climb a tree)
+ HLA B27
What is the main clinical finding that differentiates Ehrlichiosis from Lyme disease
Ehrlichiosis presents with no rash
Lyme disease presents with a rash
4 year old boy's mom complains of perianal itching that is worse at night? What is your diagnostic test of choice to confirm your suspected diagnosis?
Scotch tape test
Drug of choice for Pt diagnosed with anthrax
Ciprofloxacin
This protozoan disease is most commonly caused by contaminated water from remote streams/wells
Giardia lamblia or Backpackers diarrhea
The 7 Ds associated with botulism?
-Diplopia within 12-36 hours
-Dry mouth
-Dysphagia
-Dysarthria
-Dysphonia
-Decreased muscle strength
-Dilated fixed pupils: in most cases
What are three differential diagnosis that are associated with ixodes tick?
Babesiosis, Ehrlichiosis, Lyme disease
Mainstay of diagnosis for malaria
Giemsa stain peripheral smear (thin and thick)
Doxycycline + Rifampin