| streptococcus ictaluri sp. nov., isolated from channel catfish ictalurus punctatus broodstock. | a streptococcal-like organism was associated with diseased channel catfish ictalurus punctatus broodstock on four commercial aquaculture operations in the mississippi delta. conventional biochemical testing, 16s rrna gene sequence analysis and dna-dna hybridization distinguished the isolates from these fish from previously published streptococcus species. comparative 16s rrna gene sequencing studies revealed that the isolates were phylogenetically most similar to streptococcus iniae, streptococc ... | 2007 | 17625202 |
| streptococcus ictaluri arthritis, osteolysis, myositis, and spinal meningitis in channel catfish broodstock. | this report details findings of an investigation into complaints by commercial fingerling producers of low-grade mortalities, poor reproductive success, emaciation, skin lesions, and severely arched backs among broodstock of channel catfish ictalurus punctatus. gross lesions involved the jaw, fin bases, and vertebral column. jaw and fin lesions consisted of small hemorrhagic ulcers and exudate-filled tracts that communicated with underlying joints and destroyed their articular surfaces. spinal c ... | 2008 | 18536503 |
| pathogenicity of streptococcus ictaluri to channel catfish. | the pathogenicity of a streptococcus ictaluri isolate in channel catfish ictalurus punctatus at the fry (0.5 g), fingerling (15 g), and juvenile (55 g) stages was determined by experimental bath immersion and injection experiments. channel catfish were exposed in 1-l immersion baths containing 10(8), 10(9), 10(10), 10(11) or 10(12) colony-forming units (cfu) of s. ictaluri. fish were also injected intraperitoneally with 0.1 ml of bacterial solution for final doses of 10(4), 10(5), 10(6), 10(7), ... | 2009 | 20043405 |
| specific serum antibody responses in channel catfish (ictalurus punctatus) provide limited protection against streptococcus ictaluri challenge. | passive immunization studies were conducted to determine the role of specific antibodies in immunity to streptococcus ictaluri. adult channel catfish (ictalurus punctatus) were injected i.p. with tryptic soy broth as control or with 1.5 × 10(7)colony-forming units (cfu) s. ictaluri/fish at 0, 30, and 60 d, and serum was collected 90 d after the original challenge. fish were passively immunized by i.p. injection with serum from the tryptic soy broth (tsb) control group, anti-s. ictaluri serum fro ... | 2011 | 21962634 |