TABLE 2.

Serological results for toxoplasmosis, determined by IgG, IgM, and IgA ELISA (Axsym, Abbott) and IgG avidity test (Vidaś, Biomérieux)

Case no.Delaya (days)IgG (IU/ml)bIgM (optical density)cIgA (optical density)cIgG avidity
112304.46.6NDd
792,7752.7NDND
2904,7304.71.2Weak
323504.74.2Weak
4401,25010.82.2Weak
512c5717.8NDND
2178518.1NDND
66e4.24.12.0ND
222,3758.7NDND
7155910.82.6ND
322,54011.62.7ND
8−320eNegativeNegativeNDND
172903.1NDND
262,8503.8NDND
98e3211NDND
202389.3NDND
107NegativeNegativeNDND
8Negative1.9NDND
94.73.7NDND
10137.3NDND
11279.5NDND
117e4711.1NDND
141655.1NDND
1216419.3NDWeak
13171748.4NDND
204578.8NDND
342,3909.4NDND
14217110.3NDND
272448.1NDND
341,1197.7NDND
15143549NDWeak
171,7478.6NDND
262,2809.1NDND
161128312.6NDND
1743111.8NDND
262,5458.6NDND
  • a Delay between the onset of symptoms and collection of blood sample used for serological testing. A negative number indicates that testing was carried out before the onset of symptoms.

  • b Positivity threshold, IgG: 4 IU/ml.

  • c Positivity threshold, > 0.60.

  • d ND, not determined.

  • e Serological tests were carried out on frozen sera.