title: Some characteristics of host-parasite relationship for Cryptocaryon irritans isolated from South China.
abstract: A survey on the host range for the parasitic ciliate Cryptocaryon irritans was carried out among the major maricultured fish species in the Huizhou region of Guangdong Province in South China, and some characteristics of its host-parasite relationship were described. The survey showed that all ten investigated species of fish (representing six different families) were infected with C. irritans with similar susceptibility. In chemoattraction assays, sera and mucus collected from investigated fish strongly attracts C. irritans theronts. Sera collected from infected orange-spotted groupers and yellow spotted grunts (Plectorhynchus cinctus) could immobilize C. irritans theronts, and their immobilization titers were 1:40 and 1:6.7, respectively. The surface antigens of C. irritans were demonstrated by indirect immunofluorescence and immunostaining assays using immune orange-spotted grouper serum and a monoclonal antibody against grouper IgM.
authors.affiliation: School of Life Sciences, Sun Yat-sen University, 135 Xingang West Street, Haizhu District, Guangzhou, Guangdong Province 510275, People's Republic of China.
authors.forename: X C
authors.initials: XC
authors.lastname: Luo
authors.forename: M Q
authors.initials: MQ
authors.lastname: Xie
authors.forename: X Q
authors.initials: XQ
authors.lastname: Zhu
authors.forename: A X
authors.initials: AX
authors.lastname: Li
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood / Q000276:immunology; D000953:Antigens, Protozoan / Q000032:analysis; D017756:Aquaculture; D054443:Cell Migration Assays; D002633:Chemotaxis / Q000502:physiology; D002681:China; D016798:Ciliophora / Q000302:isolation & purification* / Q000502:physiology*; D005399:Fishes / Q000469:parasitology*; D019084:Fluorescent Antibody Technique, Indirect; D006790:Host-Parasite Interactions; D007150:Immunohistochemistry; D009093:Mucus / Q000469:parasitology; D044967:Serum / Q000276:immunology / Q000469:parasitology
chemical_list: D000913:Antibodies, Protozoan; D000953:Antigens, Protozoan