Clinical cases, test prep Flashcards
(146 cards)
Peruvian farmer, 2 days of non painful ulcer, dyspnea, HA, shock. CXR shows mediastinal widening.
Organism? Transmission? Diagnosis? Treatment?
Bacillus Anthracis
Inhalation of spores
Penicillin + Cipro + Meropenem + antitoxin (if you have it) The reason for these drugs is because he has CNS involvement
Peruvian farmer, two week history of painful lesions
Organism? Transmission? Diagnosis? Treatment?
Dx: Sporothrix Schenkii
Transmission: Cutaneous
Diagnosis: Daisy cells on pathology
Tx; Itraconazole
Patient with painful lesion (12cm) that developed over 12 months. Undermined lesion. Organism? Treatment?
Dx: Mycobacterium Ulcerans (Buruli Ulcer)
Tx: Clarithromycin + Rifampicin
Painless ulcer/lesion that developed over 1 week in a Brazilian Farmer
Organism? Treatment?
Dx: Leishmania Braziliensis
Tx: Pentavalent Antimonials
VERY painful lesion that developed over 2 days. Plaque like lesion with small vesicles and 3 colors. Red, white, blue. Organism? Tx?
Dx: Loxosceles spp (spider bite)
Tx: None
Bolivian patient with a 6 month h/o pleuritic chest pain, wound at the lateral chest wall, pleural effusion, grain.
Organism?Tx?
Empyema necesitans, actinomyces spp
Tx: Penicillin
Painless lesions with concomitant uveitis and hepatitis. NEver traveled out of Lima. Disseminated papular nodular rash on back, palms and soles. Organism? Tx?
Treponema Pallidum (syphilis)
Tx: Penicillin
A 50 year old woman returns from 2 weeks of medical mission trip to Honduras. She develops bloating, epigastric discomfort, diarrhea. The diarrhea is watery/foul smelling. What are the top 4 protozoans that cause this? Treatment for each?
- Giardia Lamblia -Metronidazole
- Cystoisospora Belli-TMP/SMX
- Cyclospora Cayatenensis -TMP/SMX
- Cryptosporidium Hominis-Nitazoxanide
12 year old girl with headache, seizures, tonic/clonic seizures, HA, photophobia. From Cusco, no known TB contacts.
Organism? Treatment?
Single CT lesion <20mm, no e/o ICP elevation, Can see the scolex:
Taenia Solium, Neurocystercircosis
Tx: Albendazole + steroids (both for short time) + Keppra (AEDs to be continued)
*DO NOT need prazi because only single cyst
24yoF with h/o developmental delay; Seizures at 8years old, continued to have seizures.
Identify what kind of cyst, what is the organism, what is the treatment
Cystic lesions with scolex present, calcifications: intraventricular AND subarachnoid
Org: T. Solium, neurocystercircosis
Tx: Concern for hydrocephalus with ventricular NCC, so need to consider neuroendoscopy removal if possible or a VP shunt to relieve hydrocephalus. Continue albendazole and praziquantel and steroids and anti epileptics
Patient has intermittent positional vertigo and headache. One day, develops left hemiparesis. ICP is increased. Has Hoffmans sign, UE Strength diminished. What do you see, what are you concerned about, what organism, what tx
You see CT scan with dilated lateral and third ventricle, concern for intraventricular but also maybe subarachnoid involvement. Lacunar strokes are concerning.
Organism: Taenia Solium, INtraventricular, subarachnoid
Tx: Steroids, Mannitol, Albendazole, Praziquantel, Acetazolamide, VP Shunt
45yo F 10-15 years PTA seizure. Began paresthesias in fingers, hands, arms, LOC, tonic clonic movements, somnolence. What do you see? What is the organism? What is the treatment
MRI shows ICP elevation, cerebral edema, collapsed ventricles.
Dx: Taenia Solium
Tx: DO NOT give antiparasitic drugs in ICP elevation; first give STEROIDS and other meds to control ICP. THEN give Albendazole and prazi. If you give antiparasitics immediately, you will cause the parasite to die and increase ICP even more
A 55 year old mexican male presented with fever, abdominal pain, RUQ tenderness with leukocytosis and left shift. Alk phosph 2x ULN. Single hypodense lesion in the right lobe of his liver. Organism? Treatment?
Organism : Entamoeba Histolytica
Treatment: Luminal agent-parmomycin, Tissular-Metronidazole
62yo Man presented with 3 days of fever, onset 4 weeks after safari to tanzania. INitial evaluation neg, fever resolved. Pt then devloped a urticarial rash, pruritis. Labs WBC 8100, Eos 12%. Pt went swimming in hotel pond. What causes this? How to diagnose? What treatment?
Organism: Schistosoma spp (Katayama Fever)
Diagnosis: Serology
Treatment: Steroids (for the katayama fever) + Praziquantel. Then repeat the prazi to kill the adult worms
Fresh water exposure in Africa, high grade eosinophilia. Fever, Rash, Urticaria. Oranism? Diagnosis? Treatment?
Organism: Acute schistosoma spp (Katayama Fever)
Diagnosis: Serology
Treatment: Praziquantel + Steroids, repeat Praziquantel
65yoF immigrant from cambodia 20years prior. Notes mild abdominal pain. Exam unremarkable. Abs eos 720. Stool O&P negative. H pylori negative. Colonoscopy neg. Organism? Diagnosis? Treatment?
Org: Strongyloides Stercoralis
Diagnosis: Serology
Tx: Ivermectin (2 doses) unless hyperinfection
Cough, nonspecific abdominal pain, rash , perianal itching
Org: Strongyloides Stercoralis
Diagnosis: Serology
Tx: Ivermectin (2 doses)
Soldiers with eosinophilia >10%, abdominal pain and diarrhea. In moist climate, exposed to soil
Organism: Hookworm spp. (Necator Americanus, Ancylostoma Duodenale)
Diagnosis: Stool examination
Treatment: Albendazole
What is the lifecycle of this?
organism: Hook worm
Life cycle: eggs in feces, rhabditiform larva hatches, development to filariform larva in the environment, filariform larva penetrates the skin, larva exit irculation in the lungs, coughed and swallowed
26year old man with 6 years of working in the rainforest in Madagascar, ROS MIld swelling in the forearms. Lives in rural areas. Has lived in Africa. +Eosinophilia. Migratory swelling . Organism? Vector? Symmptoms? Diagnosis? Treatment?
Organism: Loa Loa
Vector: Chrysops fly
Symptoms: calabar swelling, eye worm
Diagnose: centrifuge blood and examine microscopy
Treatment: Depending on #. Caution with ivermectin and DEC because of CNS side effects if microfilaria >2500 mf/mL. Look for co-infection with onchocerca (skin snips) -then definitely do not give DEC!
tropical pulmonary eosinophilia and calabar swelling
Loa Loa
Diagnose: Blood microscopy
Treatment: >2500, apharesis then DEC
<2500 DEC
Check onchocerca first
Caution with ivermectin for CNS side effects
23yoF traveled to SE Asia for 2 months. 3 weeks after return, onset fever, abdominal pain, diarrhea, urticarial rash. Lab shows 57% eos.
Toxocara Canis (Visceral larva migrans)
Diagnosis is usually clinical
Tx: Albendazole if symptomatic
What are the larva migrans syndromes? List at least 7
Toxocara
Baylisascaris
Angiostrongylus
Gnathostomiasis
Acute Ascaris
Paragonimus
Acute Fascioliasis
List the things that cause skin nodules with eosinophilia, migratory larvae
Gnathostomiasis, Paragonimiasis, Fascioliasis, Sparganosis