Micro p.142-146 Flashcards

1
Q

Ixodes ticks live on which animals?

A

deer and mice

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2
Q

which bacterial infection is frequently mistaken for Kaposi sarcoma?

A

bacillary angiomatosis by Bartonella spp

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3
Q

Other infection that Bartonella spp cause?

A

Cat scratch disease

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4
Q

Relapsing fever is caused by?

A

Borrelia recurrentis, (recurrent due to variable surface

antigens)

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5
Q

Unpasteurized dairy can be the source of what bacterial infection?

A

Brucellosis/undulant fever

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6
Q

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

A

Campylobacter

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7
Q

Which bug may cause bloody Diarrhea, vomiting,

fever, abdominal cramps by eating poultry?

A

Salmonella

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8
Q

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

A

Coxiella burnetii

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9
Q

Leptospirosis can be transmitted thru what?

A

animal urine

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10
Q

Pasteurella multocida can cause what 2 pathologies?

A

Cellulitis, osteomyelitis

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11
Q

Amine whiff test is used to dx which bac infection?

A

Gardnerella vaginalis

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12
Q

Tx for Gardnerella vaginalis?

A

metronidazole or clindamycin

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13
Q

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

A

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

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14
Q

Tx for all Rickettsial diseases?

A

Doxycycline

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15
Q

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

A

Rocky Mountain spotted fever by Rickettsia rickettsii

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16
Q

Which Rickettsia causes an epidemic of human body louse?

A

R. prowazekii.

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17
Q

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

A

Ehrlichiosis

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18
Q

Which bug has granulocytes with morulae in cytoplasm?

A

Anaplasmosis

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19
Q

Whats the most common cause of culture ⊝ endocarditis?

A

Coxiella burnetii

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20
Q

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

A

F. Its vice versa

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21
Q

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

A

The chlamydial cell wall lacks classic

peptidoglycan (due to reduced muramic acid),

22
Q

What stain is used to dx Chlamydia?

A

Giemsa or fluorescent antibody–stained smear

23
Q

Name 4 paths of Chlamydia trachomatis:

A

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

24
Q

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

A

Types A, B, and C

25
Q

What is Lymphogranuloma venereum and what causes it?

A

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

26
Q

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

A

Mycoplasma pneumoniae

27
Q

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

A

Mycoplasma pneumoniae

28
Q

Tx for local mycosis infection

A

fluconazole or itraconazole for local infection

29
Q

Tx for systemic mycosis infection?

A

amphotericin B

30
Q

Systemic mycoses can mimic what other granulomatous infection?

A

TB

31
Q

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

A

Paracoccidio

32
Q

Name the fungus that causes inflammatory lung disease

and can forms granulomatous nodules.

A

Blastomycosis

33
Q

Which states are Blastomycosis found?

A

States east of Mississippi River and Central

America.

34
Q

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

A

Broad-base budding, same size as RBC

35
Q

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

A

Coccidioides

36
Q

2 Fungi that can disseminates to skin and bone?

A

Blastomyces, Coccidioides

37
Q
Order the size of the following fungi compared to RBC: 
Histoplasma 
Blastomycosis
Coccidiomycosis
Paracoccidioidomycosis
A

Histoplasma > RBC

Paracoccidioidomycosis&raquo_space; RBC

38
Q

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

A

in Southwestern, California

after earthquakes spores in dust thrown into air areŽ inhaled –> spherules in lung

39
Q

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

A

Histoplasmosis

40
Q

Histoplasmosis is found where in the cell?

A

inside macrophage

41
Q

Bird or bat droppings might contain what fungus?

A

Histoplasmosis

42
Q

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

A

Tinea

dermatophytes

43
Q

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

A

Tinea capitis

44
Q

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

A

Tinea corporis

45
Q

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

A

Tinea cruris

46
Q

Which type of Tinea pedis is the MC type?

A

Interdigital

47
Q

which Tinea causes Onychomycosis on nails?

A

Tinea unguium

48
Q

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

A

Malassezia spp (Tinea versicolor)

49
Q

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

A

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

50
Q

Tx for Tinea versicolor?

A

topical and/or oral antifungal medications, selenium sulfide.