Fig. 1. Humoral immune response against Trichinella zimbabwensis in
Nile crocodile (Crocodylus niloticus) by ELISA. Panel A, 19 T. zimbabwensis
experimentally infected Nile crocodiles; panel B, four uninfected
crocodiles. Data are expressed as the ratio between the mean OD values
of the serum duplicates at each week p.i. (Mean OD450Rti) and the mean
OD values at 450 nm of the serum duplicates at day 0 (Mean OD450Rt0).