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Table 1 Summary of the characteristics of serological tests relative to two references of experimental chickens, (A) T. gondii inoculated vs non-inoculated chickens, (B) MC-qPCR (magnetic capture quantitative PCR) positive vs non-inoculated chickens, stratified for the tests. For the analysis, all experimentally inoculated chickens were excluded, if their infection had not been confirmed by MC-qPCR

From: Fluorescent bead-based serological detection of Toxoplasma gondii infection in chickens

Reference

Serological test

% diagnostic sensitivity [95% CI] (positive/reference positivea)

% diagnostic specificity [95% CI] (negative/reference negativeb)

Youden’s index

(A) Inoculated vs non-inoculated

 

TgSAG1bio-BBMA

98.5 [90.7–99.9] (65/66)

100 [82.2–100] (23/23)

0.99

 

TgSAG1-ELISAcSH

91.1 [80.6–96.3] (60/66)

100 [82.2–100] (23/23)

0.91

 

TgSAG1-ELISAcSL

92.4 [82.5–97.2] (61/66)

100 [82.2–100] (23/23)

0.92

 

IFATc

97.0 [88.5–99.5] (64/66)

100 [82.2–100] (23/23)

0.97

 

MATc

92.4 [82.5–97.2] (61/66)

100 [82.2–100] (23/23)

0.87

(B) MC-qPCR positive vs non-inoculated

 

TgSAG1bio-BBMA

100 [90.4–100] (45/45)

100 [82.2–100] (23/23)

1.00

 

TgSAG1-ELISAcSH

100 [90.4–100] (45/45)

100 [82.2–100] (23/23)

1.00

 

TgSAG1-ELISAcSL

100 [90.4–100] (45/45)

100 [82.2–100] (23/23)

1.00

 

IFATc

100 [90.4–100] (45/45)

100 [82.2–100] (23/23)

1.00

 

MATc

100 [90.4–100] (45/45)

100 [82.2–100] (23/23)

1.00

  1. aA chicken was regarded as reference-positive if at least one of the tissues from this animal tested positive by MC-qPCR
  2. bAll non-inoculated control chickens were regarded as reference-negative
  3. cResults published previously [22] but shown for comparison
  4. Abbreviation: CI, confidence interval