Microbiology 2

Question 1

Babesiosis (Babesia microti) vector:

Answer 1

Ixodes scapularis tick

Same for Lyme disease and HGA Human Granulocytic Anaplasmosis

Question 2

Geographic distribution of Ixodes tick

Answer 2

Northeastern United States (Massachusetts)

Question 3

Diagnosis of patient from Massachussetts with flu-like symptoms, fevers, fatigue, myalgias, headache, Anemia, thrombocytopenia, >LFTs and pleomorphic intraerytrhocytic ring forms (or maltese crosses) in giemsa stain

Answer 3

Babesiosis (Babesia microti) - Ixodes scapularis

Question 4

Chancroid causative organism

Answer 4

Haemophilus ducreyi

Question 5

Penile initial painful lesion with:

• Multiple and deep ulcers
• Base with grey to yellow exudate
• Organisms in long parallel strands “school of fish”

Answer 5

Chancroid

Haemophilus ducreyi

Question 6

Are the initial ulcers of sexual herpes painful?

Answer 6

YES

Question 7

Granuloma inguinale (donovanosis) causative agent

Answer 7

Klebsiella granulomatis

Question 8

Deeply staining gram-negative intracytoplasmic cysts and a non painful initial lesion in sexual infection:

Answer 8

Donovanosis (Granuloma inguinale)

Question 9

Thin, delicate corkscrew-shaped organisms on dark-field microscopy + no initial pain in an indurated sexual ulcer:

Answer 9

Syphilis (Treponema pallidum)

Question 10

Lymphogranuloma venereum STI caused by

Answer 10

Chlamydia trachomatis

Question 11

You “do cry” with…

Answer 11

H. ducreyi!

Chancroid

Question 12

Child with erythematous pharynx with grey-white exudates + splots or blotches that blanch with pressure + sunburn with goose pimples + circumoral pallor

Answer 12

Scarlet fever (Group A streptococcus)

Question 13

As with any streptococcal upper respiratory infection, Scarlet fever can predispose to:

Answer 13

Rheumatic fever and PSGN

Question 14

Treatment with ______ ___ can prevent the development of rheumatic fever but NOT PSGN

Answer 14

Penicillin V

Question 15

Main cause of osteomyelitis in childhood age

Answer 15

Staphylococcus aureus

Hematogenous seeding after bacteremia

Question 16

Main cause of osteomyelitis in Sickle cell disease

Answer 16

Salmonella, Staph aureus

hematogenous seeding to infracted bone

Question 17

Vertebral osteomyelitis secondary to hematogenous seeding from the lungs

Answer 17

Potts disease (Mycobacterium tuberculosis)

Question 18

COPD disease exacerbation main viral triggers

Answer 18

Rhinovirus, influenzae, parainfluenzae

Question 19

COPD disease exacerbation main bacterial triggers

Answer 19

H. influenzae
Moraxella catarrhalis
Streptococcus pneumoniae

Question 20

COPD exacerbation presentation

Answer 20

Worsening productive cough
dyspnea on exertion
mild hypoxemia
wheezing

Question 21

Serum heterophile antibodies that agglutinate with erythrocytes from related species (horse in Monospot or sheep in Paul-bunnell) diagnosis:

Answer 21

Infectious Mononucleosis (IM) from EBV

Question 22

Heterophile antibody NEGATIVE mononucleosis-like syndrome

Answer 22

Cytomegalovirus infection (CMV)