Diagnostic parasitology Flashcards
What are the defining features of T. cruzi?
Large kinetoplast,
Monomorphic
C-shaped trypomastigotes
In which plasmodium species are you likely to see accole forms?
P. falciparum
On a thin blood slide you see numerous small, delicate ring forms and crescent shaped gametocytes. What plasmodium species is it?
P. falciparum
What colours are the nucleus and cytoplasm in plasmodium species?
Nucleus stained red
Cytoplasm stained blue
What are the defining features of T. Brucei?
Small kinetoplast
Pleomorphic
Dividing forms seen in blood
In what plasmodium species do you find double chromatin dots and multiple invasions of RBC?
P. falciparum
In a thin blood slide you see amoeboid trophozoites and schizont so with 16-24 merozoites. What plasmodium species is it likely to be?
P. vivax
What species of plasmodium do you see schuffners dots and enlarged RBCs?
P. vivax and P. ovale
In a thin blood film you see enlarged, fimbriated RBCs and schizonts with 8-12 merozoites. What plasmodium species is it likely to be?
P. ovale
In a thin blood film you see infected microcytic RBCs and band form trophozoites. What plasmodium species is it likely to be?
P. malariae
What are the defining features of Wucheria bancrofti?
Sheath
Nuclei throughout body
Gently curved body
Tail tapered, no nuclei at end
What are the defining features no features of Brugia malayi?
Sheath
Nuclei through body
2 sub-terminal nuclei
Usually kinked
What are the defining features of loa loa?
Curled round tail
Sheath
Nuclei extend to tip of tail
In a faecal sample you see a round cyst with 1-4 nuclei and 10-15 micrometers long. What is it likely to be?
Entamoeba histolytica/ dispar
In a faecal sample, you see a flask-shaped yellowish egg measuring 25-30 micrometers with an operculum. What is it?
Opisthorchis spp.
In a faecal sample you see a round, brown egg with thick, striated membrane and 3 pairs of hooklets. What egg is it and what’s its size range?
Taenia spp.
35-45 micrometers
In a faecal sample you see a round, translucent egg with 3 pairs of hooklets. What is it and what’s its size range?
Hymenolepis nana.
35-40 micrometers
In a faecal sample you see a barrel shaped egg with translucent bipolar plugs. What is it and what is its size range?
Trichuris trichiura
50-55 micrometers
In a faecal sample you see an oval, translucent egg with a thin wall and dividing cells within the egg. What is it and what size range is it?
Hookworm
60-70 micrometers.
In a faecal sample you see an oval egg with a brown, bumpy outer coat. What is it and what is its size range?
Fertile Ascaris lumbricoides
55-65 micrometers
In a faecal sample you see a brown, triangular shaped egg. What is it and what size range is it?
Infertile Ascaris lumbricoides
85-90 micrometers
In a faecal sample you see an oval, pale yellow egg with an operculum measuring 65-70 micrometers. What is it?
Diphyllobothrium latum
In a faecal sample you see an oval, brownish egg with an operculum measuring 70-110 micrometers. What is it?
Paragonimus spp.
In a faecal sample you see an oval, yellow/brown egg with an operculum measuring 120-140 micrometers. What is it?
Fasciola/fasciolopsis
In a faecal sample you see a round translucent egg with very small apical spin. What is it and what is its size range?
Schistosoma japonicum
80-90 micrometers
In a faecal sample you see a large, translucent oval egg with terminal spine. What is this it and what is its size range?
Schistosoma haematobium
110-170 micrometers
In a faecal sample you see a large, translucent, oval egg with a lateral spine. What is it and what is its size range?
Schistosoma mansoni
110-170 micrometers
