Detection of Bovine IgG Isotypes in a PPA-ELISA for Johne's Disease Diagnosis in Infected Herds

Table 1

Percentages of positivity of isotypes/PPA-ELISAs.

Groups	IgG/PPA-ELISA	IgG1/PPA-ELISA	IgG2/PPA-ELISA
Hc	0.0% (0/38)	5.3% (2/38)	7.9% (3/38)
E	26.7% (8/30)	3.3% (1/30)	63.3% (19/30)
SC	23.1% (6/26)	11.5% (3/26)	53.8% (14/26)
C	92.9% (13/14)	57.1% (8/14)	85.7% (12/14)

Numbers of positive animals are shown between brackets. Groups: healthy controls (Hc, n = 38), exposed (E, n = 30), subclinically infected (SC, n = 26), and clinically infected (C, n = 14).