Repeated USMLE Questions Step 1 (78)

A 13-year-old boy with a history of sickle cell disease complains of severe pain in his right leg. History, physical examination and radiology reveal diagnosis of osteomyelitis. What is the causative organism most likely responsible for this infection? A-Listeria monocytogenes B-Pseudomonas aeruginosa C-Salmonella enteritidis D-Serratia marcescens E-Streptococcus viridans Answer: Salmonella enteritidis is the most likely [...]

By | November 6th, 2016|USMLE Step 1|2 Comments

Repeated USMLE Questions Step 1 (77)

A 42-year-old woman with a history of renal insufficiency visits her physician with a recent respiratory tract infection. Her physician wants to prescribe antibiotic for her infection. Which of these antibiotics does NOT need adjustment because of her renal insufficiency? A-Cefazolin B-Cefoxitin C-Ceftriaxone D-Cephalexin E-Fosfomycin Answer: The only drug of the listed ones that is [...]

By | November 1st, 2016|USMLE Step 1|0 Comments

Repeated USMLE Questions Step 1 (76)

A 33-year-old man presents to his physician to discuss his plans for treatment of hyperthyroidism. One of the options is potassium perchlorate. What is the mechanism of action of potassium perchlorate as anti-thyroid? A-Blocking of coupling of iodo-tyrosines B-Blocking of peroxidase catalyzed reactions C-Blocking of peripheral deiodination of T3 and T4 D-Competitive inhibition of iodide [...]

By | October 30th, 2016|USMLE Step 1|0 Comments

Repeated USMLE Questions Step 2 CK (76)

A 27- year-old, 27 week-pregnant woman, on her fourth pregnancy was involved in a motor vehicle accident 5 hours ago. She was taken to the emergency room (ER) . After a thorough examination, she was found stable with no complaint. Now, she feels lower abdominal pain and vaginal bleeding. She is dizzy and distressed. She [...]

By | October 26th, 2016|USMLE Step 2 CK|0 Comments

Repeated USMLE Questions Step 1 (75)

Workers in the aniline dye industry are more susceptible to bladder cancer than general population. Studies show that animals, when exposed to beta-naphthylamine develop liver cancer but not bladder cancer. What is the most likely explanation of this finding A-Metabolism of beta-naphthylamine by human cytochrome 450 system in the liver B-Detoxification of beta-naphthylamine by glucuronic [...]

By | October 26th, 2016|USMLE Step 1|0 Comments

Repeated USMLE Questions Step 2 CK (75)

A 37 year-old Congress candidate comes to your clinic for a follow-up visit. She had a seizure last week witnessed by her campaign manager. She had stiffness of her whole body followed by jerking movements by her arms, trunk and legs for 30 seconds and then she fell in a deep sleep. Her campaign manager [...]

By | October 24th, 2016|USMLE Step 2 CK|0 Comments

Repeated USMLE Questions Step 1 (74)

A 23-year-old man from Southwestern Africa develops hemolytic anemia after taking primaquine, malarial prophylactic drug. what is the enzyme deficiency? A- Aldolase B- Glucose-6-phosphate dehydrogenase C- Isocitrate dehydrogenase D- Lactate dehydrogenase E- Uridyl transferase Answer: Glucose-6-phosphate dehydrogenase is the rate limiting enzyme in HMP shunt. Its deficiency leads to low levels of NADPH which is [...]

By | October 22nd, 2016|USMLE Step 1|0 Comments

Repeated USMLE Questions Step 2 CK (74)

A 36 year-old man presents to the emergency room with a complaint of severe chest pain, difficulty in breathing and dry cough. He is anxious because his father died of a heart attack in his forties. He is an athlete, never smokes, never drinks alcohol or takes any recreational drugs. His chest pain is sharp [...]

By | October 17th, 2016|USMLE Step 2 CK|0 Comments

Repeated USMLE Questions Step 2 CK (73)

A 27 year-old man complains of 2-week history of watery diarrhea and 5 lb. weight loss. He had no similar episodes in the past, did not travel recently, did not eat out or take antibiotics. He quit smoking last month after 1 PPD for 5 years.  He has a family history of inflammatory bowel syndrome. [...]

By | October 15th, 2016|USMLE Step 2 CK|0 Comments