Microbiology (Questions)

Question 1

89 yr Old man with 15 yr History of Diabetes, Outer Ear swollen and drainage from ear canal. Surrounding skin edematous and erythmatous.
Organism produces exotoxin that inhibits protein synthesis? Describe causative agent.

Answer 1

Pseudomonas Aeruginosa (External Otitis/Swimmer’s Ear)
Exotoxin A
O+, Pigment producing, G- Rod

Question 2

Fever, Malaise, Dry Cough. Accompanying headache and Muscle aches
Lab: Elevated IgM isohemagglutinins

Answer 2

Mycoplasma Pneumoniae
(interstitial Pneumonia and elevated cold agglutinins)

Question 3

Pneumonia in HIV+ and CD<200

Answer 3

Pneumocystis Jirovecii

Question 4

Pneumonia associated with smokers/COPD and bronchopneumonia in children

Answer 4

Haemophilus Influenza

Question 5

26 y/o AA male complainging of increased fatigu/malaise for past 3 months. Recent episode of dark colored urine. NO IV Drug but marijuana 1-2/weekly. Several unprotected seuxal intercourse during past year. ABD: RUQ tenderness/Hepatomegaly
Which Lab finding most likely present in patient

Answer 5

HBsAG (Hepatitis)

Unprotected intercourse: Viral Hepatitis (HepB)

Question 6

2 y/o girl with rash. Midly febrile for last 2 days. Rash appeared yesterday afternoon. PE: Vesicular rash on buttocks, legs, arms, palms, back of hands and in mouth. Structure of Causative agent?

Answer 6

Naked, Positive sense, ssRNA (Picornavirus)

Question 7

26 y/o F, unilateral redness of left eye, mucopurulent discharge. PE: follicular conjunctivitis and enlarged tender preauricular lymph node. Giemsa staining: Basophilic intracytoplasmice epithelial inclusion bodies.
Treatment?

Answer 7

Azithromycin
(Chlamydia Trachomatis A-C)
Conjunctivitis in Adults (unilateral red eye+Mucopurulent discharge)
Azithromycin, Tetracycline, Erythromycin for 3-4 weeks