Micro p.142-146

Question 1

Ixodes ticks live on which animals?

Answer 1

deer and mice

Question 2

which bacterial infection is frequently mistaken for Kaposi sarcoma?

Answer 2

bacillary angiomatosis by Bartonella spp

Question 3

Other infection that Bartonella spp cause?

Answer 3

Cat scratch disease

Question 4

Relapsing fever is caused by?

Answer 4

Borrelia recurrentis, (recurrent due to variable surface

antigens)

Question 5

Unpasteurized dairy can be the source of what bacterial infection?

Answer 5

Brucellosis/undulant fever

Question 6

Which bug can cause bloody diarrhea that is transmitted from puppies, livestock (fecal-oral, ingestion of
undercooked meat)?

Answer 6

Campylobacter

Question 7

Which bug may cause bloody Diarrhea, vomiting,

fever, abdominal cramps by eating poultry?

Answer 7

Salmonella

Question 8

The spores of this bug can be inhaled as aerosols from cattle/sheep amniotic fluid:

Answer 8

Coxiella burnetii

Question 9

Leptospirosis can be transmitted thru what?

Answer 9

animal urine

Question 10

Pasteurella multocida can cause what 2 pathologies?

Answer 10

Cellulitis, osteomyelitis

Question 11

Amine whiff test is used to dx which bac infection?

Answer 11

Gardnerella vaginalis

Question 12

Tx for Gardnerella vaginalis?

Answer 12

metronidazole or clindamycin

Question 13

T or F? Gardnerella vaginalis is not associated with sexual activity, and is not sexually transmitted.

Answer 13

F, Gardnerella vaginalis is associated with sexual activity but is not an STD!

Question 14

Tx for all Rickettsial diseases?

Answer 14

Doxycycline

Question 15

Which bac infection causes rash that typically starts at wrists and ankles and then spreads to trunk, palms, and soles?

Answer 15

Rocky Mountain spotted fever by Rickettsia rickettsii

Question 16

Which Rickettsia causes an epidemic of human body louse?

Answer 16

R. prowazekii.

Question 17

which bug has a morulae in cytoplasm of monocyte? (berry-like inclusions)

Answer 17

Ehrlichiosis

Question 18

Which bug has granulocytes with morulae in cytoplasm?

Answer 18

Anaplasmosis

Question 19

Whats the most common cause of culture ⊝ endocarditis?

Answer 19

Coxiella burnetii

Question 20

T or F? Elementary body replicates in cell by fission; while Reticulate bodies are Enfectious and enters cell via
endocytosis.

Answer 20

F. Its vice versa

Question 21

Why are β-lactam antibiotics less effective with Chlamydia infections?

Answer 21

The chlamydial cell wall lacks classic

peptidoglycan (due to reduced muramic acid),

Question 22

What stain is used to dx Chlamydia?

Answer 22

Giemsa or fluorescent antibody–stained smear

Question 23

Name 4 paths of Chlamydia trachomatis:

Answer 23

reactive arthritis (Reiter syndrome)
follicular conjunctivitis
non-gonococcal urethritis
PID

Question 24

Which Chlamydial trachomatis serotypes cause chronic infection, blindness due to follicular conjunctivitis in Africa?

Answer 24

Types A, B, and C

Question 25

What is Lymphogranuloma venereum and what causes it?

Answer 25

small, painless ulcers on genitals--> swollen, painful inguinal lymph nodes that ulcerate (buboes). Caused by Chlamydia trachomatis Types L1, L2, and L3

Question 26

Bug that causes nonproductive cough, patchy or diffuse interstitial infiltrate), X-ray looks worse than patient?

Answer 26

Mycoplasma pneumoniae

Question 27

Which bug cold agglutinates or lyse RBCs and is grown on Eaton agar?

Answer 27

Mycoplasma pneumoniae

Question 28

Tx for local mycosis infection

Answer 28

fluconazole or itraconazole for local infection

Question 29

Tx for systemic mycosis infection?

Answer 29

amphotericin B

Question 30

Systemic mycoses can mimic what other granulomatous infection?

Answer 30

TB

Question 31

Name the budding yeast in Latin America which is much larger than RBC?

Answer 31

Paracoccidio

Question 32

Name the fungus that causes inflammatory lung disease | and can forms granulomatous nodules.

Answer 32

Blastomycosis

Question 33

Which states are Blastomycosis found?

Answer 33

States east of Mississippi River and Central | America.

Question 34

How does Blastomycosis reproduce and whats their size compared to RBC?

Answer 34

Broad-base budding, same size as RBC

Question 35

Fungus that can cause erythema nodosum, arthralgias, pneumonia and meningitis?

Answer 35

Coccidioides

Question 36

2 Fungi that can disseminates to skin and bone?

Answer 36

Blastomyces, Coccidioides

Question 37

``` Order the size of the following fungi compared to RBC: Histoplasma Blastomycosis Coccidiomycosis Paracoccidioidomycosis ```

Answer 37

Histoplasma > RBC | Paracoccidioidomycosis >> RBC

Question 38

Coccidioidomycosis is found where in United States, and how does it transmit?

Answer 38

in Southwestern, California | after earthquakes spores in dust thrown into air areŽ inhaled --> spherules in lung

Question 39

Which fungal infection is seen in Mississippi and Ohio River valleys?

Answer 39

Histoplasmosis

Question 40

Histoplasmosis is found where in the cell?

Answer 40

inside macrophage

Question 41

Bird or bat droppings might contain what fungus?

Answer 41

Histoplasmosis

Question 42

Name the branching septate hyphae visible on KOH preparation with blue fungal stain?

Answer 42

Tinea | dermatophytes

Question 43

Which Tinea occurs on head, scalp and is associated with lymphadenopathy, alopecia, scaling?

Answer 43

Tinea capitis

Question 44

Which Tina is characterized by erythematous scaling rings (“ringworm”) and central clearing that can be acquired from contact with an infected cat or dog?

Answer 44

Tinea corporis

Question 45

Which Tinea occurs in inguinal area and often does not show the central clearing seen in tinea corporis?

Answer 45

Tinea cruris

Question 46

Which type of Tinea pedis is the MC type?

Answer 46

Interdigital

Question 47

which Tinea causes Onychomycosis on nails?

Answer 47

Tinea unguium

Question 48

Name the yeast-like fungus that degradates lipids producing acids which damage melanocytes and cause hypopigmented and/or pink patches?

Answer 48

Malassezia spp (Tinea versicolor)

Question 49

In which season do Malassezia infections commonly occur? How do they appearance on microscopy?

Answer 49

in summer (hot, humid weather). looks like “Spaghetti and meatballs” under microscope.

Question 50

Tx for Tinea versicolor?

Answer 50

topical and/or oral antifungal medications, selenium sulfide.