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  1. USMLE Step 1 Forum
    A sexually active 18-year-old woman presents with a fever of 102 F for the past 24 hours and lower abdominal pain and anorexia for the past 5 days. On physical examination, there is generalized tenderness of the abdomen, and the cervix is erythematous with motion tenderness. There is no rash nor...
  2. USMLE Step 1 Forum
    Which of the following organisms is most likely to be implicated as a cause of urethritis that persists after antibiotic therapy for gonorrhea? A. Actinomyces B. Chlamydia C. Mycobacteria D. Nocardia E. Rickettsia
  3. USMLE Step 1 Forum
    A 24-year-old woman in her third trimester of pregnancy presents withurinary frequency and burning for the past few days. She denies fever,nausea, vomiting, or chills. She takes no medications besides prenatalvitamins and is generally in good health. Physical examination isremarkable for mild...
  4. USMLE Step 1 Forum
    Trypanosoma cruzi initially penetrates through the mucous membranes on the skin and then multiplies in a lesion known as a chagoma. In the chronic stage of the disease, the main lesions are often observed in the a. Spleen and pancreas b. Heart and digestive tract c. Liver and spleen d...
  5. USMLE Step 1 Forum
    One of the most clinically significant infections in patients with AIDS is Pneumocystis carinii pneumonia (PCP). PCP is a treatable disease; therefore, rapid diagnosis is essential. The method of choice for detection of P. carinii in respiratory specimens is a. Methenamine-silver stain b...
  6. USMLE Step 1 Forum
    from what I understand.... Hepatitis B has reverse transcriptase.... meaning "RNA DEPENDENT DNA POLYMERASE" but in the FIRST AID it says For HEP B- "REVERSE TRANSCRIPTASE, TRANSCRIBES DNA GENOME FROM RNA INTERMEDIATE. HOWEVER, THE VIRION ENZYME IS A DNA DEPENDENT DNA POLYMERASE" can...
  7. USMLE Step 1 Forum
    A 35-year-old has a 3-month history of epigastric pain without radiation into the back. The stool is black colored and is positive for blood. He has a past history of gastric ulcer disease due to Helicobacter pylori. Which of the following tests will identify the cause of his pain and also...
  8. USMLE Step 1 Forum
    A 30 yr old woman comes for an initial evaluation. Hx of IVDA and is now completing a methadone maintenance program. Physical examination shows scars in the antecubital fossae. CXR shows small nodules in the perihilar lung fields. A biopsy specimen from the perihilar regions will most likely...
  9. USMLE Step 1 Forum
    Gentamicin would be an ineffective drug for which of the following organisms? A) E. coli B) B. fragilis C) Pseudomonas D) Listeria if combined with ampicilin E) Proteus
  10. USMLE Step 1 Forum
    Which of the following antibacterials is most suitable for treatment of a lower urinary tract infection in a 28-year-old woman who is 10 weeks pregnant? A) Amoxicillin B) Trimethoprim C) Tetracycline D) Erythromycin E) Flucloxacillin
  11. USMLE Step 1 Forum
    A 60 y/o forest ranger has been experiencing periodic fever and chills, followed by profuse sweating and prostration for the past several days. One year earlier, he had undergone a splenectomy due to an injury he had suffered in an automobile accident. He has never traveled outside the Midwest...
  12. USMLE Step 1 Mnemonics
    Cocci gram (+) Novobiocin just count the # of S in the beginning of the word (must be equal) S. epidermidis Sensitive = # of "S" = 2 S. Saprophyticus resistent = # of "S" = 2 Optochin just count the # of V (must be equal) S. pneumoniae sensitiVe = # of "V" = 1 S. Viridans resistent = # of "V"...
  13. USMLE Step 1 Forum
    i got a question with recurrent neisseria infections and in the options were both C5 and C6 seperately. did not knw which to pick since both in MAC. but ended up picking C5. wat do u guys think?
  14. USMLE Step 1 Forum
    A bacterium is examined and is found to lack superoxide dismutase, catalase, and peroxidase. Which of the following statements best describes this bacterium? a. This bacterium is an anaerobe b. This bacterium will survive in an oxygen environment c. This bacterium is more virulent than one...
  15. USMLE Step 1 Forum
    What are the mobile bacteria? Can you make a list of them? :(
  16. USMLE Step 1 Forum
    About six weeks after a male 25yr old visits the red light district in New Orleans, and he develops a nonprupritic, maculopapular rash. The rash is generalized and includes hands, feet, and mucous membranes of the oral and anogenital areas. The rapid plasma reagin (RPR) test is negative at the...
  17. USMLE Step 1 Mnemonics
    "MRDICS": - Microcephaly - vs. macrocephaly secondary to hydrocephalus in congenital toxoplasmosis - Mental Retardation - Deafness (sensorineural) - also seen in congenital rubella - Itracranial Calcifications (periventricular) - vs. the intracranial calcifications distributed throughout the...
  18. USMLE Step 1 Mnemonics
    A: Group A strep (S. pyogenes): pyrogenic exotoxins SpeA and SpeC B: Botulinum toxin C: Cholera toxin D: Diphtheria toxin E: EHEC: Verotoxin (Shiga-like toxin) S: Shiga toxin
  19. USMLE Step 1 Mnemonics
    Body Heat Changes Shape Blastomycoses Histoplama Coccidiodes Sporothrix
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