| fish mortality in the mississippi catfish farming industry in 1988: causes and treatments. | the 1988 fish mortality summary for the catfish (ictalurus punctatus) industry in mississippi is presented. in 1988, 2,456 cases were submitted to mississippi cooperative extension service fish disease laboratories at belzoni and stoneville. bacterial infection caused by edwardsiella ictaluri was the leading cause of catfish mortality. descriptions and treatments are presented for bacterial, parasitic, viral and other diseases affecting mississippi farm-raised catfish in 1988. | 1991 | 2023314 |
| bolbophorus damnificus n. sp. (digenea: bolbophoridae) from the channel catfish ictalurus punctatus and american white pelican pelecanus erythrorhynchos in the usa based on life-cycle and molecular data. | the common pathogenic prodiplostomulum metacercaria in the flesh, mostly near the skin, of pond-produced channel catfish ictalurus punctatus has been demonstrated to be bolbophorus damnificus overstreet & curran n. sp. the catfish acquires the infection from the snail planorbella trivolvis, the only known first intermediate host, and the species is perpetuated through the american white pelican pelecanus erythrorhynchos, as confirmed by experimental infections with nestling and dewormed adult pe ... | 2002 | 12075128 |
| an asian origin of virulent aeromonas hydrophila responsible for disease epidemics in united states-farmed catfish. | since 2009, catfish farming in the southeastern united states has been severely impacted by a highly virulent and clonal population of aeromonas hydrophila causing motile aeromonas septicemia (mas) in catfish. the possible origin of this newly emerged highly virulent a. hydrophila strain is unknown. in this study, we show using whole-genome sequencing and comparative genomics that a. hydrophila isolates from diseased grass carp in china and catfish in the united states have highly similar genome ... | 2014 | 24895303 |
| rapid quantitative detection of aeromonas hydrophila strains associated with disease outbreaks in catfish aquaculture. | a new strain of aeromonas hydrophila has been implicated in significant losses in farm-raised catfish. outbreaks attributable to this new strain began in alabama in the summer of 2009 and have spread to arkansas and mississippi in subsequent years. these outbreaks mostly afflicted market-sized fish and resulted in considerable losses in short periods of time. the present research was designed to develop an expeditious diagnostic procedure to detect the new strains of a. hydrophila due to the rap ... | 2013 | 23847227 |
| lesions caused by virulent aeromonas hydrophila in farmed catfish ( ictalurus punctatus and i. punctatus × i. furcatus) in mississippi. | in 2009, a virulent strain of aeromonas hydrophila caused severe disease and high mortalities (motile aeromonad septicemia variant [masv]) in farmed channel catfish ( ictalurus punctatus) and hybrid catfish ( i. punctatus × i. furcatus) in eastern mississippi and alabama. as is common in mas, there is severe hemorrhagic dermatitis with ulceration, as well as abdominal hyperemia, petechiation, and mild ascites. additional findings in masv cases include panophthalmitis and orbital cellulitis, lead ... | 2017 | 28482758 |
| 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 |
| cyanobacteria and earthy/musty compounds found in commercial catfish (ictalurus punctatus) ponds in the mississippi delta and mississippi--alabama blackland prairie. | the compounds responsible for earthy and musty "off-flavors" in farm-raised channel catfish (ictalurus punctatus) in the southeastern united states of america are geosmin and 2-methylisoborneol (mib), respectively. these compounds are produced by certain species of cyanobacteria (blue-green algae) that grow in the aquaculture ponds. previous research has focused on the species of cyanobacteria found in catfish ponds in west mississippi (the leading region of catfish production in the usa), while ... | 2005 | 15993924 |
| defeating diplostomoid dangers in usa catfish aquaculture. | diplostomoid digenean metacercariae have caused widescale mortalities of channel catfish, ictalurus punctatus (rafinesque), at aquaculture farms in louisiana, mississippi and arkansas, usa. originally, based on a tentative diagnosis, the industry considered the primary harmful agent to be an introduced species from europe, bolbophorus confusus (krause, 1914), frequently reported from the american white pelican, pelecanus erythrorhynchos gmelin. our group has now shown, using its 1-2 plus three m ... | 2004 | 15357393 |
| fish tissue quality in the lower mississippi river and health risks from fish consumption. | between 1990 and 1994, samples of three shellfish species (i.e. blue crab, callinectes sapidus;crayfish, procambarus acutis; and river shrimp, macrobrachium ohionii) and 16 fish species and were collected at six sites along the lower mississippi river by the louisiana department of environmental quality, office of water resources in coordination with the us environmental protection agency. the fish species included: bigmouth buffalo (ictiobus cyanellus); blue catfish (ictalurus furcatus); carp ( ... | 2003 | 12526903 |
| development and use of modified live edwardsiella ictaluri vaccine against enteric septicemia of catfish. | the present study showed that e. ictaluri re-33 vaccine does not cause esc but does stimulate protective immunity. the re-33 vaccinates were protected against esc for at least 4 months following a single bath immersion in a low number of e. ictaluri re-33 without booster vaccination. antibody responses are weak after re-33 vaccination. edwardsiella ictaluri re-33 vaccine presents no risk or hazard to catfish. re-33 vaccine will prevent esc caused by most isolates of e. ictaluri in catfish. we re ... | 1999 | 9890040 |
| seasonal values of selected blood parameters of farm-raised channel catfish (ictalurus punctatus) in the mississippi delta. | hematocrit, sodium, chloride, potassium, calcium, glucose, and ph were measured in whole blood of 1,522 channel catfish collected from 3 commercial food-fish ponds in the mississippi delta. samples were collected from march 1995 to march 1996 to monitor seasonal fluctuations. a total of 10-20 fish were arbitrarily collected with snag lines from each pond on each sample day. the mean monthly hematocrits fluctuated seasonally from a low of 14.5% in midwinter to a high of 25.7% in midsummer (annual ... | 1998 | 9786522 |
| gastrointestinal torsion in a channel catfish (ictalurus punctatus). | a case of gastrointestinal torsion with dilatation in a farm-raised channel catfish (ictalurus punctatus) was examined at the thad cochran national warmwater aquaculture center (stoneville, mississippi, usa). the affected fish was a gravid female broodfish, which displayed pale gills and a markedly distended abdomen. internal examination revealed that the gastrointestinal tract and ovaries were rotated around each other four times in a counterclockwise direction as viewed in right lateral recumb ... | 2003 | 12685091 |
| microsomal estrogen metabolism in channel catfish. | our goal was to study the involvement of cytochrome p450 genes in estrogen metabolism and the extent to which the potentially carcinogenic 4-hydroxyestradiol metabolite is formed by channel catfish (ictalurus punctatus; cc). estradiol metabolism and ethoxyresorufin-o-deethylase (erod) activity were assessed in several tissues from fish collected from three variably contaminated sites in the mississippi river delta, from laboratory control fish, and from fish exposed to 20 mg/kg benzo(a)pyrene (b ... | 2013 | 15178071 |
| morphological, histological, and molecular description of unicauda fimbrethilae n. sp. (cnidaria: myxosporea: myxobolidae) from the intestinal tract of channel catfish ictalurus punctatus. | the channel catfish ictalurus punctatus is a known host for 10 species of henneguya, but few other myxozoan genera are described from this species. unicauda is a genus of myxozoan parasites within the family myxobolidae that consists of 10 valid species from freshwater fish. herein, we describe a novel species of unicauda from the intestinal tract of farm-raised channel catfish in mississippi. myxospores were consistent with the genus unicauda but exhibited a unique branching at the terminal end ... | 2016 | 26377372 |
| characterization of the life cycle of a fish eye fluke, austrodiplostomum ostrowskiae (digenea: diplostomidae), with notes on two other diplostomids infecting biomphalaria havanensis (mollusca: planorbidae) from catfish aquaculture ponds in mississippi, usa. | ocular diplostomiasis is caused by trematode species in the family diplostomidae, specifically those in the genera austrodiplostomum, diplostomum, and tylodelphys. diplostomid trematodes are globally distributed parasites of fish. heavy infections of diplostomids that parasitize the eyes of fish can result in acute mortality while chronic infections are often characterized by impaired vision or blindness. in the southeastern united states, commercial catfish production is threatened by piscivoro ... | 2016 | 26741049 |
| pond-level risk factors associated with columnaris disease on mississippi commercial catfish farms. | a large commercial catfish enterprise encompassing over 500 food fish ponds from five farms covering multiple counties in the mississippi delta was included in this analysis of columnaris risk factors. a gram-negative bacterium, flavobacterium columnare, is the cause of columnaris disease and is considered the second-most prevalent bacterial disease in farm-raised catfish. the objective of this study was to determine if pond-level risk factors reported by farm personnel were associated with colu ... | 2012 | 22897761 |
| a real-time polymerase chain reaction assay for quantification of edwardsiella ictaluri in catfish pond water and genetic homogeneity of diagnostic case isolates from mississippi. | a quantitative polymerase chain reaction (qpcr) assay was developed for the detection and quantification of edwardsiella ictaluri in channel catfish ictalurus punctatus pond water using modifications to a published e. ictaluri-specific qpcr assay and previously established protocols for the molecular detection of myxozoan parasites in catfish ponds. genomic dna equivalents indicative of the number of bacteria in a sample were determined and standard curves correlating to bacterial numbers were e ... | 2011 | 22372245 |
| comparison of edwardsiella ictaluri isolates from different hosts and geographic origins. | the intraspecific variability of e. ictaluri isolates from different origins was investigated. isolates were recovered from farm-raised catfish (ictalurus punctatus) in mississippi, usa, tilapia (oreochromis niloticus) cultured in the western hemisphere and zebrafish (danio rerio) propagated in florida, usa. these isolates were phenotypically homologous and antimicrobial profiles were largely similar. genetically, isolates possessed differences that could be exploited by repetitive-sequence-medi ... | 2016 | 26661707 |
| disease spread models to estimate highly uncertain emerging diseases losses for animal agriculture insurance policies: an application to the u.s. farm-raised catfish industry. | emerging diseases (ed) can have devastating effects on agriculture. consequently, agricultural insurance for ed can develop if basic insurability criteria are met, including the capability to estimate the severity of ed outbreaks with associated uncertainty. the u.s. farm-raised channel catfish (ictalurus punctatus) industry was used to evaluate the feasibility of using a disease spread simulation modeling framework to estimate the potential losses from new ed for agricultural insurance purposes ... | 2013 | 23560798 |
| histological and computed tomographic evaluation of a parasitic conjoined twin in hybrid catfish (ictalurus punctatus [rafinesque] x ictalurus furcatus [lesueur]). | there is growing use of hybrid catfish (ictalurus punctatus ♀ x ictalurus furcatus ♂) in commercial aquaculture to utilize hybrid vigour to improve production a conjoined twin specimen found during the course of production studies by the united states department of agriculture catfish genetic research unit (usda-cgru) was submitted to the aquatic research and diagnostic laboratory (ardl). after preliminary inspection, it was transported to mississippi state university, college of veterinary medi ... | 2014 | 23991936 |
| snp discovery in wild and domesticated populations of blue catfish, ictalurus furcatus, using genotyping-by-sequencing and subsequent snp validation. | blue catfish, ictalurus furcatus, are valued in the united states as a trophy fishery for their capacity to reach large sizes, sometimes exceeding 45 kg. additionally, blue catfish × channel catfish (i. punctatus) hybrid food fish production has recently increased the demand for blue catfish broodstock. however, there has been little study of the genetic impacts and interaction of farmed, introduced and stocked populations of blue catfish. we utilized genotyping-by-sequencing (gbs) to capture an ... | 2014 | 24797164 |
| molecular and morphological characterization of myxozoan actinospore types from a commercial catfish pond in the mississippi delta. | the actinospore diversity of infected dero digitata was surveyed (may 2011) from a channel catfish (ictalurus punctatus) production pond in the mississippi delta region for the elucidation of unknown myxozoan life cycles. at present, only 2 myxozoan life cycles have been molecularly confirmed in channel catfish, linking the actinospore stage from an aquatic oligochaete (d. digitata ) and the myxospore stage from the catfish. in this study d. digitata (n = 2,592) were isolated from oligochaetes c ... | 2014 | 25003942 |
| the effects of a sublethal dose of botulinum serotype e on the swimming performance of channel catfish fingerlings. | abstract visceral toxicosis of catfish (vtc) is a disease of cultured channel catfish ictalurus punctatus in the mississippi delta region and surrounding states. the etiology of vtc is associated with botulinum serotype e (bont/e), which causes blockage of acetylcholine release at the neuromuscular junction, leading to weakness and paralysis of skeletal muscles (including those involved in swimming). this study attempted to determine if sublethal exposure to purified bont/e caused reductions in ... | 2014 | 25229485 |
| mercury concentrations in fish from three major lakes in north mississippi: spatial and temporal differences and human health risk assessment. | the goal of this study was to compare total mercury (hg) concentrations in fish muscle tissue and assess consumption health risks of fish collected from three north mississippi lakes (sardis, enid, and grenada) that are extensively used for fishing and recreation. largemouth bass (lmb; n = 64), channel catfish (cc; n = 72), and white crappie (wc; n = 100), which represent a range of trophic levels, were collected during spring 2013 and 2014. creel data estimated that anglers harvested approximat ... | 2016 | 27644342 |