Infectious Disease Flashcards
White curd like vaginal discharge should make you think of what diagnosis?
Vaginal candida infection
Owl eye inclusion bodies should make you think of what diagnosis?
Cytomegalovirus (CMV)
If you have a patient with positive blood cultures for candida what is the first line drug?
Amphotericin B
What is the treatment for pertussis?
Erythromycin x 7 days
A leukemia patient has a CT of the liver which shows punched out lesions. What diagnosis should you be thinking of?
Hepatosplenic candida
What disease does Rickettsia rickettsii cause?
Rocky Mountain spotted fever
An India ink stain showing cysts should make you think of what diagnosis?
Cryptococcosis
A COPD patient has apical cavities and calcified nodes on his CXR. You also discover he has a pet bat and a few birds. What is the most likely diagnosis?
Histoplasmosis
An HIV patient presents with a nonproductive cough and a CXR showing diffuse interstitial infiltrates. What is the most likely diagnosis?
Pneumocystis jiroveci pneumonia (PCJ) formerly known as Pneumocystis pneumonia (PCP)
Honey and babies should make you think of what diagnosis?
Botulism
What type of organism causes botulism?
What is the treatment for botulism?
- A Gram + rod, Clostridium
botulinum - Antitoxin
A patient presents to the ER with acute progessive weakness, diplopia and a very dry mouth. What organism may be causing this?
Clostridium botulinum
Rice water stool should make you think of what diagnosis?
Cholera
Is diphtheria a Gram-positive or negative organism?
Gram-positive
A stuck on grey membrane in the pharynx should make you think of what diagnosis?
Diphtheria
What are four steps in treating diphtheria?
Antitoxin, penicillin, remove membrane, report the case to the CDC
What is the clinical name for whooping cough?
Pertussis
What type of organism causes tetanus?
A Gram + rod, Clostridium tetani
A patient ate out last night and today has cramping and bloody diarrhea. What is the most likely organism?
Salmonella
Diarrhea with blood and mucus should make you think of what diagnosis?
Shigella
What is the best test to diagnose malaria?
Peripheral blood smear
What organism has been linked to reactive arthritis?
Shigella, also remember that reactive arthritis has a positive HLA-B27.
What is the treatment for Shigella?
Bactrim or fluoroquinolones and hydration.
What organism causes Lyme disease?
Borrelia burgdorferi
What is the minimum amount of time needed for a tick to transfer
Lyme disease to a human?
24 hours
What is the drug of choice to treat Lyme disease in kids or pregnant women?
Amoxicillin
What is the drug of choice to treat C. difficile?
Metronidazole (Flagyl)
A patient was in the woods yesterday and today presents with erythema migrans. What is the most likely diagnosis?
Lyme disease
What drug is used for the treatment or prophylaxis of malaria?
Chloroquine
A patient was camping a few days ago and now has a rash that began on his wrists and ankles.
What is the most likely diagnosis?
Rocky Mountain spotted fever
What is the drug of choice for treating Rocky Mountain spotted fever?
Doxycycline
What is the drug of choice for the treatment of syphilis?
Pencillin
Any reference to dark field microscopy should make you think of what organism?
Treponema pallidum
Is staph gram (+) or gram (-)?
Gram (+)
A patient being treated with penicillin for a syphilis infection develops fever, chills, muscle pain and headaches. Do you stop treatment?
No this is Jarisch-Herxheimer reaction
The patient must be closely monitored, but it is a response to released endotoxin from the death of the spirochetes and not an allergic reaction.
What organism is believed to be the main culprit in creating peptic ulcers?
Helicobacter pylori
A painless, clean base chancre should make you think of what diagnosis?
Primary syphilis
Is pseudomonas gram (+) or gram (-)?
Gram (-)
A patient complains of a rash on his palms and soles. He has a fever and chills. In conversation he mentions a strange painless chancre he had a few weeks ago. What is the most likely diagnosis?
Secondary syphilis. This is the most contagious stage.
What is the treatment for cholera?
Fluids