Midterm I - Miscellaneous Photos & Info Flashcards
Trypanosoma sp.: Trypomastigotes
Blood smear
Trypanosoma equiperdum: Trypomastigotes
Trypomastigote in the blood
Trypanosoma sp.: Trypomastigote
Fish blood
Leishmania sp.: Promastigotes
- Leishmania sp.*: Promastigotes
- Extracellular forms*
Leishmania sp.: Amastigotes
Divided & intracellular - Only in macrophages
Giardia sp.: Trophozoite
Containing 2 nuclei
Giardia sp.: Trophozoites
AfricanTrypanosoma sp.: life cycle
Trypanosoma sp.: Form type in the vertebrate host tissue
Amastigotes
Trypanosoma sp.: Form type(s) in insects
- Promastigote
- Epimastigote
Trypanosoma sp.: Form type in the vertebrate host’s blood
Trypomastigote
“Metacyclic form”
Trypanosoma sp.: Symptoms
- Genital & abdominal oedema
- Cachexia
African Trypanosoma sp. “Salivaria”: Vector
Tsetse fly
Males & females
Trypanosoma equiperdum: Life cycle
Trypanosoma cruzi: Life cycle
Leishmania sp.: Life cycle
Passed on by the saliva (not faeces)
Leishmania sp.: Form type In vertebrates
Amastigotes
Leishmania sp.: Form type In insects
Promastigotes
Leishmania sp.: Vector
Female sand fly
Leishmania tropica: Pathological form
Cutaneous form (skin)
Leishmania braziliensis: Pathological form
Mucocutaneous form (oral & nasal cavity)
Leishmania donovani: Pathological form
Visceral form (liver, spleen etc.)
Leishmania infantum: Pathological form
Visceral & cutaneous form
Leishmania chagasi: Pathological form
Visceral & cutaneous form
Giardia sp.: Life cycle
Spreading by cysts
Giardia sp.: Cysts
Giemsa stain not good - Cysts appear empty
Giardia sp.: Cysts
Faecal smear, Poor staining - Nuclei of cysts cannot be seen
Giardia sp.: Cysts
Faecal smear, poor staining - Nuclei of cysts cannot be seen
Giardia sp.: Cysts
Floatation method - not good, empty cysts
Trichomonadida sp.: Life cycle
Trichomonas species are grouped by…
The number of anterior flagella they have
- Trichomonas foetus*
- In cattle*
- Trichomonas gallinae*
- In poultry*
Trichomonas sp.: Trophozoites
Trichomonas sp.: Trophozoites
Trichomonas sp.: Trophozoite
Trichomonas sp.: Trophozoites
Broth culture
Trichomonas gallinae: Necropsy specimen
Trichomonas gallinae: Liver necrosis
Histomonas sp.: Life cycle
Histomonas sp.: Susceptible species
- Turkey
- Partridge
- Quail
- Guinea fowl
- (Chicken)
Histomonas sp.: Forms
Histomonas sp.: Necropsy findings
- Histomonas meleagridis*: Trophozoite
- Liver, PAS Stain*
Histomonas sp.: Trophozoite
Histomonas meleagirdis: Black head disease
Caused by cyanosis, only becomes black post mortem
Generalised histomosis
Histomonas meleagirdis: Infection of the caeca of a turkey
Eimeria sp.: Life cycle
Eimeria sp.: Summarise the zoites
Sporozoites & merozoites
- Unicellular forms
- Asexual form in all apicomplexan parasites
- Lunar shaped
Apicomplexan sporozoites & merozoites
Giemsa stain
Apicomplexan parasite: Sporozoites & merozoites
Apicomplexan parasite: Sporozoites & merozoites
Apicomplexan parasite: Sporozoites & merozoites
Apicomplexan parasite: Sporozoites & merozoites
Eimeria sp.: Trophozoite
Schizonts
Filled with trophozoites or merozoites
Intracellular schizont
Schizonts: Filled with trophozoites or merozoites
Schizonts: Full of trophozoites or merozoites
Schizonts filled with trophozoites or merozoites
Notice the nucleus pressed to the side
Schizont with other staining
Zoites aren’t visible due to staining
Eimeria sp. infection
- Eimeria sp.*: Schizont
- Zoites can’t be seen inside*
Eimeria sp.: Merozoites
Eimeria sp.: Microgamonts (male)
Eimeria sp.: Macrogamonts (female)
Schizogony
Gametogony
Gametogony
Schizogony
Eimeria sp.: Gamonts
Amongst chicken RBCs
Eimeria sp.: Macrogamonts (female)
Purple appearance
Eimeria sp. infection: Normal chicken RBC
Eimeria sp.: Empty oocysts
Eimeria sp.: Empty oocyst
Eimeria sp.: Macrogamonts
Eimeria sp.: Ripened oocyst
Gamonts
Nuclei of nurse cells
Eimeria sp.: Oocysts shedding into the lumen
Eimeria sp.: Oocysts enter the gut lumen
What is significant about the staining of unsporolated oocysts?
They cannot be stained with standard histological stains
Eimeria sp.: Unsporolated oocysts
Contains a zygote
Eimeria sp.: Unsporolated oocysts
Contains a zygote
Eimeria sp.: Unsporulated oocysts