Fig. 21

An immunohistochemical staining of anti-PCNA shows (A-C) Immunostaining of anti-PCNA marker observed as nuclear staining of cells lining the crypt of the intestine of control fish. (D-F) Immunostaining of anti-PCNA in the intestine of infected fish in epithelium (Ep), lamina propria (LP), and muscular layer (ML) (arrowheads)