Fish which survive a sublethal ichthyophthiriasis acquire protective immunity against @entity26994 Fouquet (Ich). This study evaluated the protective effect of cutaneous antibody secreted by @entity4576 , @entity4576 (Rafinesque), immune to Ich on cohabited non-immune catfish. Non-immune and immune fish controls were separately maintained and infected with theronts. The @entity281 was assessed by scoring 0, < 50, 50-100, and > 100 trophonts fish(-1) at 5 days post- @entity281 . The results of @entity281 showed that cohabited fish at the ratio of 15 non-immune to two immune fish had < 50 trophonts fish(-1). Eighty per cent of the cohabited fish at the ratio of 10 non-immune to two immune fish showed 0 or < 50 trophonts fish(-1). The 76% of control non-immune fish had more than 100 trophonts fish(-1). The control immune fish had 0 trophonts fish(-1). Anti-Ich antibody was detected using enzyme-linked immunosorbent assay in water samples taken from tanks containing immune fish after the water samples were concentrated 40-fold. The study suggests that immune fish cohabited with non-immune fish may protect non-immune fish against @entity281 .

Protective effect of cutaneous antibody produced by @entity4576 , XXXX (Rafinesque), immune to @entity26994 Fouquet on cohabited non-immune catfish.

@entity281 :: ('MESH:D007239', 'Disease') :: ['Ich infection', 'infection'] @entity26994 :: ('5932', 'Species') :: ['Ichthyophthirius multifiliis'] @entity4576 :: ('7998', 'Species') :: ['Ictalurus punctatus', 'channel catfish']
@entity4576 :: (7998,Species) :: ['Ictalurus punctatus']
