Gram (+) rods
Bacillus cereus Causes vomiting and diarrhea following consumption of reheated rice / fried rice due to germination of spores. Can also cause eye infections post-surgery (e.g., for cataracts). What the …
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Gram (+) cocci
You can see that catalase (+) vs (-) is how we differentiate the Staph vs Strep. Staph aureus Gram (+) cocci in clusters; catalase (+); coagulase (+). Grows yellow on culture medium …
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HY USMLE Q #875 – Micro
A 1-week-old neonatal male born at 39 weeks’ gestation is brought to the obstetrician for irritability and difficulty breastfeeding. He is febrile at 38 C. The mother consumed a diet …
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HY USMLE Q #847 – Micro
A 3-year-old boy is brought to the physician by his mother for a 1-day history of unusual facial erythema. Two days ago, he had a fever of 102 F. The …
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HY USMLE Q #829 – Neuro / Micro
A 51-year-old woman comes to the physician for a 2-day history of worsening fever and photophobia. Her neck is stiff. Analysis of the CSF shows: Glucose …
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HY USMLE Q #827 – HIV
A 25-year-old woman with HIV is brought to the ED by her brother for personality change over the past two weeks. She has had two episodes of Pneumocystis pneumonia during the …
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HY USMLE Q #821 – Micro
A 39-year-old woman comes to the physician for a 4-day history of a painful, tearing right eye. Vitals are within normal limits. Past medical history is unremarkable. A fluorescein instillation …
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Audio Qbank / Family medicine / Hematology / Internal Medicine / Microbiology / Pathology / Pulmonary
HY USMLE Q #810 – Micro / Pulm
A 17-year-old boy comes to the physician because of a 2-day history of fatigue, fever, and non-productive cough. Temperature is 101 F. Physical examination shows pale conjunctivae. X-ray of the …
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HY USMLE Q #796 – Microbiology
A 24-year-old woman is managed in hospital for ruptured appendicitis and sepsis. Blood pressure is stable. Exploratory laparoscopy shows a collection of pus. Gram stain shows neutrophils, gram-positive rods, gram-positive …
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HY USMLE Q #794 – Microbiology
A 39-year-old man comes to the physician for a 2-day history of high fever and chills. Physical examination shows a 2/6 holosystolic murmur at the left mid-clavicular line. There is …
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