Lab Final Flashcards
Protozoan characteristics
Heterotrophs
Aerobic
Lack cell walls
Pellicle (thick elastic membrane)
Motile
Contractile vacuole
Etiological
Disease causing
Plasmodium causes
Malaria
Plasmodium life cycle
- Carried by female anopheles mosquito vector
- Sporozoite stage transmission of disease
- Trophozoite motile form feeding and multiplying
- Schizogony: schizont produced
- Gametocyte taken up by mosquito
- Ookinetes penetrates mosquito to form an oocyst
- Oocyst wall protects it to be transmitted
Balantidium coli
Largest protozoan parasites of humans
Phylum: Ciliophora have many cilia extending from cell
Enatomoeba Histolytica
Causes dysentery
Phylum: amoebozoa
Moves by projecting protoplasmic extensions called pseudopodia
Giardia lamblia
Most common flagellate in digestive tract
(Looks like ghost)
Trypanosoma brucei
African sleeping sickness
Vector: tsetse fly
Trypanosoma cruzi
Chagas’ disease
Vector: reduviid bug
Swollen eyelids and itching
Genus euglena
Photosynthetic
Stigma: light sensitive eyespot
Helminths
Multicellular eukaryotic worms
Primary- humans, vertebrates
Intermediate- invertebrates
Vectors- fleas, ticks, lice, mosquitos
Parasite
Organism living in another organism
Cestodes
Flat, segmented, lack a digestive system
Taenia pisiforms
Scolex- head with suckers and hook hairs
Infected feeces eaten by animals, raw animal meat eaten causes infection
T Solium- pork tapeworm
T Saginata- beef tapeworm
Fish tapeworm
Diphyllobothrium latum
