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. Author manuscript; available in PMC: 2012 Aug 28.
Published in final edited form as: Trop Med Int Health. 2010 Jun 23;15(9):1077–1081. doi: 10.1111/j.1365-3156.2010.02579.x

Table 2.

Sensitivity and specificity of Ziehl Neelsen staining and egg morphological to differentiate T. solium and T. saginata eggs.

Criteria Species Sensitivity Specificity Youden’s J
Entirely magenta T. saginata 54% (7/13) 96% (17/18) 0.50
Entirely blue/purple T. solium 50% (4/8) 100% (13/13) 0.50
Ovoid T. saginata 100% (13/13) 83% (15/18) 0.83
Spheric T. solium 83% (15/18) 100% (13/13) 0.83
> 35 μm T. saginata 100% (13/13) 100% (18/18) 1.00
< 35 μm T. solium 100% (18/18) 100% (13/13) 1.00
*

Values for spheric shape or maximal diameter < 35 μm as criteria to define T. solium are inverse to those of ovoid shape or larger eggs for T. saginata, due to direct group comparison