Parasites

Question 1

Protozoa

Answer 1

• unicellular eukaryotes
• lack cell wall
• lives in moist habitats
• mainly reproduce by binary fission

Question 2

Sarcodines

Answer 2

ACANTHAMOEBA KERATITIS
- contact lenses provide ideal attachment surfaces, enabling corneal adherence
- ACANTHAMOEBA are often infected by other pathogens
- many are resistant against anti-protozoal drugs and disinfection

ENTAMOEBA HISTOLYTICA
- anaerobic
- waterborne pathogen
- leads to cramps and diarrhoea
- further growth invading intestinal wall
- if left untreated, abscesses may form and can be fatal

Question 3

Flagellates

Answer 3

GIARDIA INTESTINALS/LAMBLIA
- lives in intestines of beavers and muskrats
- transmitted to humans via faecal contamination of water sources
- can lead to diarrhoea, intestinal cramps nausea and wright loss

LEISHMANIA
- flagellated and anaerobic
- cutaneous
- visceral
- treatment includes antimonial drugs

Question 4

Ciliates

Answer 4

BALANTIDIUM COLI
- human and swine pathogen
- only cysts are infective

Question 5

Symptoms of malaria

Answer 5

• chill fever
• vomiting
• severe headache
• anaemia
• fatigue