03 - Amoebae, Trichomonads, Histomonads Flashcards
1
Q
(Pathogenic Free-Living Amoebae)
- name two species
- normally inhabit what?
- anaerobic, aerobic, or facultative?
A
- naegleria spp. & acanthamoeba spp.
- soil, stagnant water, sewage
- facultative (parasites of humans and animals)
2
Q
(Pathogenic Free-Living Amoebae)
(Acanthamoeba spp.)
- most common amoeba of freshwater and soil
- can enter what if immunocompromised?
- most commonly enters via what?
A
- CNS
- broken skin
(contact lenses and corneal abrasians –> keratitis)
3
Q
(Pathogenic Free-Living Amoebae)
(Naegleria fowleri)
- where do they live?
- when does it proliferate?
- found in what?
A
- stagnant bodies of water, thermal pools (resistant to heat), unhygenic swimming pools
- hot, dry, conditions
- humans, dogs, sheep
4
Q
- What causes primary amoebic meningoencephalitis?
A
- naegleria fowleri
(then read)
5
Q
(The flagellates)
- Sub-kingdom?
- phylum?
- sub-phylum?
A
- protozoa
- sarcomastigophora
- mastigophora
6
Q
(The flagellates)
1-2 What are the two major divisions?
A
- mucosoflagellates (trichomonads, histomonads, giardia)
- hemoflagellates (trypanosomes, leishmanias)
7
Q
(Clicker)
- amoebae are important parasites in humans as well as dogs - true or false?
A
- true
8
Q
(Clicker)
- Naegleria typically infect humans via what?
A
- the nose
9
Q
A
D
10
Q
(The flagellates)
(Trichomonoads)
(say which animal affected)
- tritrichomonas foetus -
- trichomonas gallinae -
- trichomonas vaginalis -
- tetratrichomonas gallinarum -
A
- cattle, cats
- pigeons
- humans
- galliform bird
11
Q
(flagellates)
(tritrichomonas foetus)
- host?
- where in female?
- in male?
A
- cattle
- uterus
- preputial cavity (sheath)
12
Q
(flagellates)
(tritrichomonas foetus)
A
13
Q
(flagellates)
(tritrichomonas foetus)
- How many anterior flagella?
A
- 3
(then just read)
14
Q
(flagellates)
(tritrichomonas foetus)
(life cycle)
- multiply how?
- have cysts?
- how transmitted?
- temporary in bulls?
- Cows infected via vagina and maintain infection in uterus.. what are three possible results?
A
- binary fission
- no
- coitus, AI
- bulls stay persistently infected
- some self cure in 3 months, some develop sterile immunity, some become permanent carriers
15
Q
(flagellates)
(tritrichomonas foetus)
(pathogenesis)
(bulls)
- infection maintained where?
- symptoms?
- does it affect fertility or breeding efficiency?
(cows)
- usually produces what?
- can it cause abortion?
- infection may lead to retained placenta
- if severe endometritis can cause what?
A
- preputial cavity
- usually symptomatic
- no
- low grade endometritis
- yes (early term)
- sterility