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Balantidium coli
Note cytostome (cell mouth)
kidney-shaped macronucleus
Cilia

Balantidium coli trophozoite
Note cytostome (cell mouth)
kidney-shaped macronucleus
Cilia

Balantidium coli cyst

Cyst stage → responsible for transmission (infectious stage)
Trophozoites
Excystation occurs in the small intestine
Undergo encystation in large intestine prior to passing feces
What are the 4 Main Coccidia?
Cystoisospora
Microsporidia
Cryptosporidium
Cyclospora

Modified Acid-Fast Stain
Cystoisospora belli oocyst
Contains only one sporoblast

Wet Mount
Cystoisospora belli oocyst
Note 2 sporoblasts

UV
Cystoisospora belli oocyst
2 sporoblasts


UV
Cystoisospora belli immature oocyst

Modified Acid Fast Stain
Associated with rasberries and basil
Cyclospora cayetanensis oocyst

Modified Acid Fast Stain
Associated with Rasberries and basil
Cycospora cayetanensis oocyst

Modified Acid Fast Stain
Cryptosporidium parvum/hominis

Cryptosporidium oocysts

Labeled with Immunofluorescent antibodies
Cryptosporidium spp. (yellow arrow)
Red is Giardia duodenalis

Trichrome Stain of Corneal Section
Microsporidia spores

Calcofluor White Stain
Microsporidia spp.