Nematodes - Filarial, Zoonotic Flashcards

1
Q

What are the two groups of Filarial nematodes?

A
  • Found in Blood

- NOT found in blood

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2
Q

What microfilaria are found in blood? (4)

A
  • Wuchereria bancrofti
  • Brugia malayi
  • Loa loa
  • Mansonella perstans
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3
Q

What microfilaria are NOT found in blood? (2)

A
  • Onchocerca volvulus

- Dirofilaria immitis (Dog Heartworm)

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4
Q

Which Microfilaria found in blood does not have a sheath?

A

Mansonella perstans

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5
Q

Which Microfilaria found in blood infect the lymphatics and cause elephantiasis?

A
  • W. bancrofti

- B. malayi

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6
Q

Wucherieria bancrofti:

-Tail nuclei

A

NONE

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7
Q

Brugia malayi:

-Tail nuclei

A

2 discontinuous

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8
Q

Loa Loa:

-Tail nuclei

A

Continuous row

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9
Q

Mansonella perstans:

-Tail nuclei

A

Continuous row

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10
Q

Wuchereria bancrofti and Brugia malayi:

-Transmission

A

Mosquitos

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11
Q

Wuchereria bancrofti and Brugia malayi:
-When do they shed into blood?

*when is the highest likelihood of detection

A

Primarily at night (Nocturnal periodicity)

*10 pm - 2 am

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12
Q

Loa loa:

-Transmission

A

Mango fly (Chrysops)

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13
Q

Loa loa:

  • Infection Sxs (2)
  • Periodicity
A

Migrate through SubQ and Conjunctiva
-Transient Migratory edema (calabar swellings)

Diurnal periodicity

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14
Q

Mansonella perstans:

  • Transmission
  • Habitat
A
Biting Midge (Culicoides)
-Inhabits Body Cavities
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15
Q

Onchocerca volvulus:

-Transmission

A

Simulium Black Fly

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16
Q

Onchocerca volvulus:

-Life cycle in humans (3)

A
  • Adults ball up in a subcutaneous nodule (Onchocercoma)
  • Release microfilariae into surrounding skin
  • Microfilariae migrate through the skin and eye
17
Q

Onchocerca volvulus:

-Leading cause of what?

A

Blindness (river blindness)

-Leading cause in Central Africa and Central America

18
Q

Onchocerca volvulus:

-Diagnosis

A

Larvae in skin snips

19
Q

Dirofilaria immitis:

  • AKA
  • Transmission
A

Dog Heartworm

-Mosquito

20
Q

Dirofilaria immitis:

-Presentation

A

Subcutaneous or Pulmonary Granulomas

-Surrounding a degenerating worm

21
Q

What organisms make up the Zoonotic nematodes? (4)

A
  • Trichinella spiralis
  • Toxocara canis
  • Toxocara cati
  • Anisakis
22
Q

Trichinella spiralis:

-Transmission

A

Undercooked meat

  • Pork
  • Wild game
23
Q

Trichinella spiralis:

-Infection

A

Skeletal muscle - Encysted larvae

  • Myositis
  • Weakness
24
Q

Trichinella spiralis:

-Diagnosis (2)

A
  • Serology

- Skeletal muscle bx

25
Toxocara canis/cati: | -Causes what (2)
- Visceral Larva Migrans (VLM) - Ocular Larva Migrans (OLM) *Organism wanders throughout various organs
26
Toxocara canis/cati: | -Triad
- Hypereosinophilia - Hepatosplenomegaly - Pneumonitis
27
Anisakis: | -Transmission
Fish (Raw/Undercooked)
28
Anisakis: | -Biopsy finding
Eosinophil rich granuloma containing Nematode