protozoa and helminths Flashcards

1
Q

what are protozoa

A

Classified in a sub-kingdom

Single-celled eukaryotic organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

main biological role of protozoa

A

consumers of bacteria, algae, microfungi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

how do protozoa work

A

Important parasitic and symbiotic relationships

All engulf food by phagocytosis and then digest it in intracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

why are protozoa An outdate classification

A

protozoa include both plants and animals and in reality is a group including a variety of clades within eukaryotes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what are the 5 major groups of protozoa

A

Flagellates
Amoebae
Sporozoans
Ciliates
Microsporidia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

describe flagellates

A

Flagellum as main locomotory organelle
Usually reproduce by binary fission
Intestinal flagellates or other body sites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

describe amoebae

A

Move by means of flowing cytoplasm and production of pseudopodia

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

describe sporozoans

A

malaria

No locomotory extensions
All species parasitic
Most intracellular parasites
Reproduce by multiple fission

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

describe ciliates

A

Cilia that beat rhythmically at some stage in lifecycle

2 types of nuclei – macro/micronucleus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

describe microspidia

A

Production of resistant spores
Unique polar filament; coiled inside spore
Little known about human disease

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

describe malaria

A

Protozoan infection caused by Plasmodia sporozoan.

5 species cause human disease: P.falciparum/orale/vivax/malariae/knowlesi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

how is malaria transmitted

A

by bite of female Anopheles mosquitoes:

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

describe malaria infection

A

Infection acquired during feeding from infected human
Infected for life
Life span 3-4 weeks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

descibe malaria lifecycle

A

Liver stage in P.ovale and P.vivax has additional hypnozoite stage

Lie dormant and cause late relapse by reactivating months later

Not eradicated by most conventional anti-malarial treatments

Symptomatic malaria: fever, haemolysis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

clinical features of malaria

A

Very varied

Fever almost invariable
Other common;
Chills and sweats
Headache
Myalgia
Fatigue
Nausea and vomiting
Diarrhoea

These acute symptoms common to all 4 species

How well did you know this?
1
Not at all
2
3
4
5
Perfectly