Immunofluorescence test (IFT) was used to detect the expression
and location of SeCKI in this cestode.
The tissue section
of S. erinacei plerocercoids and adult worms was firstly retrieved
by 0.01 M citric acid buffer (pH 6.0) microwave
20 min, blocked with 5 % normal goat serum in PBS, and
then incubated at 37 °C for 1 h, with a 1:10 dilution of antirSeCKI
serum, serum of mice infected with plerocercoids,
normal mouse serum, or PBS, respectively. After being
washed three times in PBS, the sections were incubated with
a 1:50 dilution of FITC-labeled anti-mouse IgG (Santa Cruz,
USA), and the nuclei were stained with propidium iodide (PI)
at 37 °C for 15 min. After being washed five times in PBS, the
sections were examined under a fluorescent microscope
(Olympus, Japan) (Liu et al. 2015a).