Blood and tissue nematodes Flashcards Preview

Mycology > Blood and tissue nematodes > Flashcards

Flashcards in Blood and tissue nematodes Deck (52):
1

General Characteristic of Blood and tissue nematodes.

Not common in U.S.
Often from eating undercooked beef, fish, pork
Man often an accidental or intermediate host

2

Common name for Trichinella spp.

Trichinosis

3

Usually caused by ingestion of raw/undercooked Pork, bear and other meat.

Trichinella spp.

4

Life cycle of Trichinella spp.

Larvae released in intestines --> encapsulate in striated muscle (active muscles, eye, diaphragm)

5

Clinical Manifestations of Trichinella spp.

Few symptoms while intestinal phase (diarrhea, abdominal discomfort)
Triad of symptoms:
-Periorbital edema, muscle pain & tenderness, eospinophilia.

6

Trichinella spp. : Diagnosis

Muscle biopsy (encysted larvae)
-squash prep (spiral form)
-Cross-sectioned mounts

7

Is stool specimen choice of the blood and tissue nematodes?

NOOOOO

8

Common name for Dracunculus medinensis.

Guiney worm

9

Largest adult Nematode

Dracunculus medinensis

10

Life cycle of Dracunculus medinensis.

Humans ingest copepod (cyclops spp)--> female migrates to surface of arm/leg to release larvae into water--> larvae ingested by copepod

11

Drancunculus medinensis: Diagnosis

Blister like papula on arm/leg
very painful/debilitating-while female discharge larvae
NO STOOL

12

Treatment of Drancunculus medinensis

Winding worm around stick
secondary infection is common if breakage of worm occurs

13

Prevention of Drancunculus medinensis

Filtration of water to remove copepods and covering water source from copepods and infected people

14

This is normally found in raccoons and common in the United States.

Baylisascaris procyonis

15

Treatment and diagnosis of Baylisascaris procyonis

No known treatment and diagnosis usually on autopsy

16

This is very serious zoonotic in humans, esp children and very resistance so have to spray with acetone and xylene.

Baylisascaris procyonis

17

Diagnosis of Baylisascaris procyonis infection

Epidemiology (exposure to raccoons??) and larvae in tissue sections . Potential biological warfare agent!!!!

18

Adults living in various lymphatic or other tissues.

Filariae

19

Microfilariae (larvae) released in _____.

Blood

20

Common name is Bancroftian filariasis or elephantiasis.

Wuchereria bancrofti

21

What is the vector of Wuchereria bancrofti & Brugia malayii?

Mosquito

22

Clinical manifestations of Wuchereria bancrofti.

Swelling of genitalia and/or lower extremities (lymphatics)
chronic infections lead to elephantiasis

23

Life cycle of Wuchereria bancrofti & Brugia malayii.

Adults live in lymphatics-> obstruction of lymphatics (esp. lower extremities)
Female worms release microfilariae into blood that ingested by mosquito where the parasite completes it's life cycle.

24

Diagnosis of Wuchereria bancrofti.

Microfilariae are sheathed, no nuclei at tip of tail, cephalic space

25

Common name is Brugian filariasis or elephantiasis

Brugia malayi

26

Clinical manifestation of Brugia malayii.

distal extremity involvement (below elbow and knee)

27

Diagnosis of Brugia malayii.

Microfilariae are sheathed, space between last two nuclei at tip of tail, cephalic space

28

Common name for Loa loa

African eyeworm

29

What is the vector of Loa loa?

Fly

30

Clinical manifestations of Loa loa.

Calabar swellings

31

Life cycle of Loa loa.

adults migrate through subcutaneous tissue (calabar swellings and migration across eye)

32

Diagnosis of Loa loa.

Microfilariae are sheathed, nuclei continuous to tip of tail.

33

Common name of Onchocerca vulvulus

Onchocercosis or River blindness

34

This is most common cause of blindness in Africa

Onchocereca vulvulus

35

How is Onchocereca vulvulus transmitted?

By black or buffalo fly

36

Clinical manifestation of Onchocereca vulvulus.

Tumors in subcutaneous tissues, leopard skin, nodules, blindness

37

Diagnosis of Onchocereca vulvulus

Skin snip; microfilariae are non-sheathed, no nuclei in tip of tail

38

This is transmitted by midges or blackfly and cause some rash, slight fever, non serious infections.

Mansonella species

39

This has no microfilariae sheath but have to differentiate from Onchocerca by position of nuclei.

Mansonella species

40

Common name of Dirofilaria immitis.

Dog heartworm

41

Most common in Indiana and vector is mosquito.

Dirofilaria immitis

42

____ live in chambers of dog's heart (infraction). ____ in blood.

Adults; microfilariae

43

Flattened dorsoventrally

Lice

44

Flattened laterally, Large hind legs for jumping, 3 pair of clawed legs, and transmit bacterial infections

Fleas

45

Three types of louse.

Body, head, pubic louse

46

This is Pediculus humanus, nits deposited clothing, transmitted host to host

Body louse

47

This is Pediculus capitus, Nits found on hair, and use wood lamp to fluoresce

head louse

48

This is Phthiris pubis, and microscopically carbs.

Pubic louse

49

This has chitenous shield, mouth parts attached to fused body, 4 pair legs in adults (3 in larvae) and usually transmits diseases (RMSF, Lyme, Babesiosis)

Ticks

50

No chitenous shielf, have short legs, burrows in skin and lays eggs.

Mites

51

Causes scabies due to host to host crowded coniditons and poor hygienes

Mites

52

Types of Arachnida.

Ticks, mites, spiders, and scorpions