2.3.1 Helminths (Nematodes: Tissue and Blood) Flashcards by Miguel Acosta | Brainscape

Q

Nematodes: Tissue and blood

Infective stage to intermediate host:

A

Microfilaria

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Q

Nematodes: Tissue and blood

Infective stage to Definitive Host:

A

Filariform larva (L3)

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Q

Nematodes: Tissue and blood

Diagnostic stage:

A

Microfilaria

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Q

Nematodes: Tissue and blood

Adult worms spp. that are found in Lymphatics?

A

Wuchereria and Brugia (Both mosquito)

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Q

Nematodes: Tissue and blood

Adult worms spp. that are found in Subcutaneous tissues?

A

Loa loa and Onchocerca

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Q

Intermediate host for Wuchereria and Brugia

A

Anopheles

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Q

Other IH for nematodes in tissue and Blood:

Aedes, Culex
Mansonia
Chrysops
Tabanid
Mango fly
Simulian black fly
Cyclops (Crustaceans)

A

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Q

Life cycle of Microfilaria

Microfilaria develops into ______ in arthropods which then enters to the skin from a bite then L3 becomes adult in _____

A

L3 (Filariform larva)

Man

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Q

Pathology:

Elephantiasis of LOWER extremities

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

a

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Q

Pathology:

Calabar swelling/fugitive syndrome, expatriate syndrome, can be seen in EYES

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

c

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Q

Pathology:

River blindness

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

d

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Q

Pathology:

Elephantiasis of UPPER extremities

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

b

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Q

Vector:

Mansonia Anopheles

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

b

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Q

Vector:

Simulian black fly

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

d

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Q

Vector:

Chrysops/tabnid/mango fly

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

c

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Q

Vector:

Aedes anopheles Culex

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

a

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Q

Specimen:

Skin nips, jerky movement microfilaria

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

d

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Q

Specimen:

blood

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

a,b,c

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Q

Microfilaria:

Sheathed, nuclei continues up to the tip

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

c

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Q

Microfilaria:

Unsheathed, no nucleus in tail

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

d

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Q

Microfilaria:

Sheathed, 2 separate nuclei in tail

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

b

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Q

Microfilaria:

Sheathed, Absent nuclei in tail

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

a

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Q

Periodicity:

Non-periodic

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

d

Q

Periodicity:

Nocturnal (10pm -1 am)

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

a

Q

Periodicity:

Diurnal (10 am to 12 pm)

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

c

Q

Periodicity:

Subperiodic nocturnal

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Onchocerca volvulus

A

b

Q

Also known as Guinea Worm, fiery serpent of Israelites or serpentine worm

A

Dracunculus medinensis

Q

Infective stage of Dracunculus medinensis?

A

Larva

Q

MOT of Dracunculus medinensis?

A

Ingestion of CRUSTACEANs with larva

Q

Final host for Dracunculus medinensis

A

Dogs, pigs, rats, man

Q

Intermediate host for Dracunculus?

A

Copepods (Cyclops)

Q

Pathology for D. medinensis is “People with _____________ disease (GWD)

A

Guinea worm

Q

Complication of D. medinensis includes:

Cellulitis
abscesses
Sepsis
Septic arthritis
Contractures

T or F

A

T

Q

D. medinensis causes LOCK JAW / _________

A

Tetanus

Q

Treatment for D. medinensis?

A

None (Manual removal)

Q

Also known as Canton China

A

Angiostrongylus cantonensis

Q

What is the common name for Angiostrongylus cantonensis

A

Rat lung worm

Q

What is the infective stage for Angiostrongylus cantonensis?

A

L3 (filariform

Q

MOT of Angiostrongylus cantonensis?

A

Ingestion of Filariform

Q

Final host for Angiostrongylus cantonensis

A

Rat

Q

Intermediate host for Angiostrngylus cantonensis

a. Copepods
b. Achatina Fulica
c. Achatina canis
d. Achatina brasiliensis

A

b

Q

Humans are considered wha type of host for Angiostrongylus contanensis

A

Accidental

Q

Habitat of A. cantonensis in the body

A

CSF

Q

Diagnostic stage for A. cantonensis?

A

Larva in CSF

Q

Angiostrongylus cantonensis Morphology:

Male adult: ______ - shaped copulatoru bursa

Female adult Milky white uterine tubules (___________ appearance)

A

Kidney

Barber’s pole appearance

Q

Angiostrongylus cantonensis Pathology:

Mental retardation, Eosiniphilic meningoencephalitis

T or F

A

T

Q

Known as the “The Great Imitator” or Trchinal worm

A

Trichinella spiralis

Q

Infective stage for Trichinella spiralis?

A

Encysted larvae

Q

MOT for Trichinela spiralis?

A

Ingestion of encysted larva from raw meet

Q

Final host and intermediate host for Trichinella spiralis?

A

Dogs, Pigs, Rats, Man

Q

Habitat for Trichinella spiralis:

Larva:
Adult:

A

Larva: Striated muscle

Adult: Intestine

Q

Dx stage for Trichinella spiralis Encysted larve in __________

A

Striated muscle

Q

Trichinella spiralis pathology includes:
- Muscle paralysis
- Muscle dystrophy
- Muscle calcification

T or F

A

T

Q

Eggs or Larva are not routinely recovered in stool and not routinely used to diagnose infection for Trichinalis spiralis

T or F

A

T

Q

Also known as Dog heart worm

A

Dirofilaria immitis

Q

Dirofilaria immitis infects:

(Organ)
Dogs:
Human:

A

Dogs: Heart
Human: Lungs

Q

Human infection for Dirofilaria immitis in the lungs is called?

A

Coin lesion