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Toxoplasmosis
[Toxoplasma gondii]
Toxoplasma gondii tachyzoites, stained by IFA Negative IFA for antibodies to T. gondii Negative IFA for antibodies to T. gondii, polar stain reaction
A B C

A: Formalin-fixed Toxoplasma gondii tachyzoites, stained by immunofluorescence (IFA).  This is a positive reaction (tachyzoites + human antibodies to Toxoplasma + FITC-labelled antihuman IgG = fluorescence).
B: Negative IFA for antibodies to T. gondii.
C: Negative IFA for antibodies to T. gondii, polar stain reaction.

 

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