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1-Scientific & lab basis of microbiology > Visuals in the lab: Recognizing infectious organisms > Flashcards

Visuals in the lab: Recognizing infectious organisms Flashcards

1
Q

What organism is this?

A

Taenid egg.

(e.g. Taenia spp., Echinococcus spp.)

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2
Q

What organism is this?

A

Ascaris lumbricoides egg.

Left: fertilized

Right: unfertilized

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3
Q

What organism is this?

A

Hymenolepis nana egg.

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4
Q

What organism is this?

A

Enterobius vermicularis egg.

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5
Q

What organism is this?

A

Dibothriocephalus latus egg.

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6
Q

What organism is this?

A

Hookworm egg.

(Ancylostoma spp., Necator spp.)

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7
Q

What organism is this?

A

Trichostrongylus egg.

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8
Q

What organism is this?

A

Paragonimus egg.

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9
Q

What organism is this?

A

Capillaria egg.

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10
Q

What organism is this?

A

Dipylidium caninum egg.

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11
Q

What organisms are these?

A

Fasciolopsis & Fasciola eggs.

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12
Q

What organisms are these, from left to right?

A

Schistosoma eggs.

  • S.japonicum*
  • S.mekongi*
  • S.haematobium*
  • S.intercalatum*
  • S.mansoni*
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13
Q

What organism is this?

A

Trichuris trichiuris egg.

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14
Q

What organisms are these?

A

Opisthorchis & Clonorchis eggs.

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15
Q

What organisms are these?

Which stage of the life cycle is shown?

A

Strongyloides stercoralis & hookworm larvae.

Left set: rhabditiform larvae.

Right set: filariform larvae.

Left-to-right: Strongy, hookworm, hookworm, Strongy

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16
Q

What organism is this?

A

Dibothrocephalus latus proglottid & scolex.

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17
Q

What organism is this?

A

Dipylidium caninum proglottid & scolex.

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18
Q

What organism is this?

A

Hymenolepis nana proglottid & scolex.

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19
Q

What organism is this?

A

Taenia saginata proglottid & scolex.

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20
Q

What organism is this?

A

Taenia solium proglottid & scolex.

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21
Q

What organism is this?

A

Curvularia

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22
Q

What organism is this?

A

Alternaria

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23
Q

What organism is this?

A

Blastomyces dermatitidis

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24
Q

What organism is this?

A

Coccidioides (C.immitis or C.posadasii)

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25
Q

What organism is this?

A

Blastomyces dermatitidis

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26
Q

What organism is this?

A

Histoplasma capsulatum

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27
Q

What organism is this?

A

Histoplasma capsulatum

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28
Q

What organism is this?

A

Coccidioides

29
Q

What organism is this?

A

Paracoccidioides brasiliensis

30
Q

What organism is this?

A

Blastomyces dermatitidis

31
Q

What organism is this?

A

Aspergillus fumigatus

32
Q

What organisms are these?

A

Epidermophyton, Microsporum, Trichophyton

(left to right)

33
Q

What organism is this?

A

Trichophyton mentagrophytes

  • Spiral hyphae
  • Penci-shaped macroconidia (rarely seen)
34
Q

What organism is this?

A

Trichophyton rubrum

  • Birds-on-a-wire hyphae
  • Cigar-shaped macroconidia
  • (Colony back usually reddish)
35
Q

What organism is this?

A

Microsporum canis

  • Snout on macroconidia
36
Q

What organism is this?

A

Malbranchea

37
Q

What organism is this?

A

Sepedonium & Chrysosporium tuberculatum

(Histoplasma lookalikes)

38
Q

What organism is this?

39
Q

What organism is this?

A

Chrysosporium keratinophilum

(Blastomyces lookalike)

40
Q

What organism is this?

41
Q

What organism is this?

42
Q

What organism is this?

A

Scedosporium

43
Q

What organism is this?

A

Lomentospora prolificans

44
Q

What organism is this?

A

Cokeromyces

45
Q

What organism is this?

A

Aspergillus versicolor

46
Q

When a colony appears grey on a BAP, what organism does this suggest?

47
Q

When a colony appears dry & pink on a MAC plate, what organism does this suggest?

A

E. coli (but non-specific)

48
Q

When a colony appears as a fine green colony on a BAP, what organism does this suggest?

49
Q

When a colony appears as a white opaque colony on a BAP, what organism does this suggest?

50
Q

When a colony appears as a small grey colony on a BAP, what organism does this suggest?

A

Enterococcus faecalis

Most strains are non-hemolytic or α-hemolytic

5% of enterococci can be ß-hemolytic

51
Q

When a colony appears as a pink mucoid colony on a MAC plate, what organism does this suggest?

A

Klebsiella pneumoniae (non-specific)

52
Q

When a colony appears as a small translucent colony on a BAP, what organism does this suggest?

A

Diptheroids (Corynebacterium).

Can also appear as white opaque colonies.

53
Q

What organism is this?

A

Talaromyces marneffei

(Note the transverse septum)

54
Q

What organism is this?

A

Paracoccidioides

55
Q

What organism is this?

A

A Mucorales fungus

56
Q

What organism is this?

A

A Mucorales fungus

57
Q

Shown is a mucicarmine-stained tissue.

(inset: Fontana-Masson)

What organism is this?

A

Cryptococcus

58
Q

What organism is this?

A

A Candida spp. producing pseudohyphae

59
Q

What organism is this?

A

Aspergillus

(Could be any hyaline mould)

60
Q

What organism is this?

A

Fusarium

(Could be any hyaline mould)

61
Q

What organism is this?

A

Pneumocystis

62
Q

What organism is this?

A

This could be any dematiaceous mould

(Note the pigment-producing hyphae)

63
Q

What organism is this?

(GMS stain)

A

Actinomyces

64
Q

What organism is this?

(Gram stain)

A

Actinomyces

65
Q

What organism is this?

(Gram stain)

66
Q

What organism is this?

(Gram stain)

67
Q

What organism is this?

(Gram stain)

A

Clostridium tetani

68
Q

What organism is this?

(Gram stain)

69
Q

What organism might this be?

How can you tell?

A

Malassezia furfur

Gives the “spaghetti and hollow meatballs” look:

  • BROKEN mycelia
  • Large spherical budding yeast with a ring around them

1-Scientific & lab basis of microbiology (9 decks)

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