What is a parasite?
An organism that lives in another organism (host) and gets its food at the expense of the host
How does the complexity of parasites compare to bacteria?
They are simple organisms but more complex than bacteria
What do parasites cause?
Many diseases with malaria causing the most deaths globally
What are the 3 classes of parasites?
What are examples of protozoa?
How is malaria spread?
What are symptoms of amoebae?
Diarrhoea with blood/pus and cysts formed in stool
What does leishmaniasis cause?
Skin or mucosal ulceration
Leads to fever and weight loss
How does leishmaniasis spread?
Bite by sandflies
How is leishmaniasis diagnoses?
Histology of biopsy material
What are examples of helminths?
What is the scientific name of roundworms?
How are nematodes diagnosed?
Pressing adhesive tape againt perianal region in the morning
Where are nematodes ova seen?
How are nematodes transmitted?
What is a common nematode and what does it do?
Ascaris lumbricoides which is a mass of worms that may obstruct the intestine or bile duct
What are common cestodes?
Taenia saginata (beef)
Taenia solium (pork)
How do cestodes spread?
Larvae cysts ingested in meat
Where are cestodes ova seen?
What is a species of cestodes carried by dogs and transmitted by humans ingesting eggs?
What is the scientific name of flukes?
What is the scientific name of tapeworms?
What are common kinds of trematodes?
Where are high rates of trematodes found?
Near fresh water
What is an important thing in the life cycle of trematodes?
What are examples of arthropods?
What are protozoa?
Microscopic once celled organisms that can be free living or parasitic in nature
How are protozoa transmitted?
Faecal-oral route (live in human intestine)
Arthropod vector (live in blood or tissue)
Where do protozoa that are transmitted by the faecal-oral route live?
Where do protozoa that are trasmitted by a arthropod vector live?
Blood or tissue