| 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 |
| 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 |
| 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 |
| a regional food-frequency questionnaire for the us mississippi delta. | to describe food sources of nutrient intake for white and african american adults in the lower mississippi delta (lmd), and their use in the development of a regional food-frequency questionnaire (ffq) based on an earlier version of the national cancer institute's health habits and history questionnaire. | 2005 | 15705249 |
| assessment of polybrominated diphenyl ether exposures and health risks associated with consumption of southern mississippi catfish. | despite the growing public interest in polybrominated diphenyl ethers (pbdes), there are relatively few studies in the published literature which characterize and quantify human intake of these compounds. in this study, pbde concentrations were measured in southern mississippi catfish to determine background levels, daily intake, and risk associated with the consumption of these chemicals from a primary food source for residents in this region of the united states. a total of 33 wild catfish sam ... | 2008 | 18800560 |
| the influence of geographical location, host maturity and sex on intestinal helminth communities of the double-crested cormorant phalacrocorax auritus from the eastern united states. | here the intestinal helminth infracommunities of 218 double-crested cormorants (phalacrocorax auritus) from 11 locations in alabama, minnesota, mississippi and vermont are documented. trematode infections were present in 98% of hosts; 65% of cormorants carried cestode infections, 4% were infected with acanthocephalans and 66% had nematode intestinal parasites. parasite infracommunities of hosts collected on wintering grounds had higher richness and diversity than did birds collected on breeding ... | 2016 | 27677375 |
| pesticide and mercury residues in commercially grown catfish. | in 1970, 54 commercial catfish farms in arkansas and mississippi were sampled for pesticide and mercury residues. pesticide residues above fda action levels were detected in 15 percent of the fish samples. data on residues in sediment, fish feed, and source water suggest that fish were not being contaminated from these sources. average fish residue per county was, however, strongly correlated with the percent of total acres planted in cotton and soybeans. results strongly suggest that cotton pro ... | 1975 | 1161448 |
| 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 |
| henneguya laseeae n. sp. from flathead catfish (pylodictis olivaris) in the upper mississippi river. | a novel species of henneguya was isolated from flathead catfish (pylodictis olivaris) captured in the upper mississippi river near lansing (allamakee county), ia, and la crosse (la crosse county), wi. designated henneguya laseeae n. sp., this novel species is described using critical morphological features, histology, and 18s ribosomal rna gene sequence. ovoid cysts, ranging from 1200 to 1800 μm in width, tended to be at filament tips or in the distal third, often directly on the filament midlin ... | 2017 | 27704217 |
| 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 |
| risk factors associated with enteric septicemia of catfish on mississippi commercial catfish farms. | a gram-negative bacterium, edwardsiella ictaluri, is the cause of enteric septicemia of catfish (esc), which is one of the most prevalent bacterial diseases in farm-raised catfish. the objective of this study was to identify risk factors associated with esc mortalities and are reported by farm personnel. to identify risk factors a catfish management database was developed. the odds ratios (or) of the final multivariable logistic regression model were: (1) volume of the pond (or, 0.56), (2) inter ... | 2014 | 24895861 |
| 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 |
| clinostomum album n. sp. and clinostomum marginatum (rudolphi, 1819), parasites of the great egret ardea alba l. from mississippi, usa. | members of the genus clinostomum leidy, 1856, colloquially known as yellow grubs, are cosmopolitan parasites of piscivorous birds, freshwater snails, fish and amphibians. in the southeastern united states, piscivorous birds present a continuous challenge for producers of farm-raised catfish. ciconiiform birds are common hosts of clinostomum spp. in north america and are endemic on most commercial catfish operations. the great egret ardea alba l. is an avian predator often found foraging on comme ... | 2017 | 28062984 |
| 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 |
| 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 |
| 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 |
| mercury in sediment and fish from north mississippi lakes. | sediments and/or fish were collected from sardis, enid and grenada lakes, which are located in three different watersheds in north mississippi, in order to assess mercury contamination. the mean total mercury concentration in sediments from enid lake in 1997 was 0.154 mg hg/kg, while 1998 sediment concentrations in sardis, enid and grenada lakes were 0.112, 0.088 and 0.133 mg hg/kg, respectively. sediment mercury concentrations in 1999 were similar in all three lakes but, generally lower than 19 ... | 2001 | 11272915 |
| elevated tcdd in chicken eggs and farm-raised catfish fed a diet with ball clay from a southern united states mine. | the u.s. food and drug administration (fda) terminated the use of ball clay from a mine in mississippi as an additive in animal feed after discovering nanogram per gram concentrations of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-tcdd). the fda collected chicken eggs and farm-raised catfish in affected areas and throughout the remaining continental united states to assess levels of 2,3,7,8-tcdd. a new method using quadrupole ion storage tandem-in-time mass spectrometry (qistms) measured the 2, ... | 1999 | 10585021 |
| ligictaluridus michaelalicea n. sp. (monogenea: dactylogyridae) from flathead catfish (pylodictis olivaris) in the upper mississippi river, including remarks on taxonomy influencing monogenean treatment regulation in the united states. | ligictaluridus michaelalicea n. sp. (monogenea: dactylogyridae, ancyrocephalinae) is described from the gills of pylodictis olivaris (siluriformes: ictaluridae) from wisconsin and iowa portions of the upper mississippi river. diagnostic features include a relatively large, strongly curved tubular cirrus with minor terminal flare; an accessory piece with a prominent basal lobe and a simple, thick terminal limb featuring a thin lateral flange and blunt distal tip devoid of recurved hooks. the sini ... | 2018 | 29362870 |
| 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 |
| risk analysis of tractor overturns on catfish farms. | fatal and nonfatal injuries occur on catfish farms as a result of tractor overturns, but these injuries can be greatly mitigated when a tractor is equipped with a rollover protective structure (rops) and seatbelt. this study analyzed the proportion of tractors on catfish farms in mississippi not equipped with rops and the cost of retrofitting those tractors with a rops and seatbelt as compared to the expected benefits gained from adding the protection. to determine if farmers have the financial ... | 2010 | 20954036 |
| levels of polychlorinated dibenzo-p-dioxins, dibenzofurans, and biphenyls in southern mississippi catfish and estimation of potential health risks. | fish consumption has been classified as one of the primary pathways of exposure to polychlorinated dibenzo-p-dioxins, dibenzofurans (pcdd/fs) and biphenyls (pcbs). in this study, we evaluated tissue levels of the 17 laterally substituted pcdd/fs, 12 dioxin-like pcbs, and 97 non-dioxin-like pcbs in a number of wild-caught and farm-raised catfish collected throughout southern mississippi. total lipid-adjusted teq and non-dioxin-like pcb concentrations in wild-caught catfish fillets were significan ... | 2009 | 19108868 |
| 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 |
| geographic variation within a tandemly repeated mitochondrial dna d-loop region of a north american freshwater fish, pylodictis olivaris. | the present study reports the distribution of a 35-bp mitochondrial dna (mtdna) d-loop tandemly repeated sequence in the populations of a north american freshwater catfish, pylodictis olivaris, and the important role of a past geological event in the phylogeographic pattern of this species. a total of 330 individuals of flathead catfish, representing 34 drainages throughout the species' native range in the united states, were collected. while more than 70% of individuals sampled from the southea ... | 2014 | 24440244 |
| 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 |
| 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 |
| photodegradation of ormetoprim in aquaculture and stream-derived dissolved organic matter. | ormetoprim (omp) is an antibiotic approved for use in the united states to prevent the spread of disease in freshwater aquaculture. it has been shown in the previous literature to be photochemically stable to direct photolysis, but the role of photosensitization processes in the presence of dissolved organic matter (dom) on the rate of degradation is not well understood. the present results show that water and dom (specifically the fulvic acid fraction) isolated from a eutrophic aquaculture catf ... | 2012 | 22950359 |
| catfish stings in mississippi. | we reviewed a series of 83 catfish sting cases from inland hospitals (belzoni and indianola) and a coastal hospital (pascagoula) to identify the type and severity of injury, as well as the type of treatment and its effectiveness. oral cephalosporin was adequate in treating early infections. | 1995 | 7631204 |
| polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (pcdd/pcdf) in food samples collected in southern mississippi, usa. | in 1994, we analyzed 43 foodstuff samples from local supermarkets in southern mississippi, usa, for pcdd/pcdf. 2,3,7,8-cl4dd could be quantified in 31 of these samples. on a lipid basis, levels in meat (0.53-1.10 pg i-teq/g) and dairy products (0.42-1.10 pg i-teq/g) were slightly lower than those reported from other industrialized countries. while levels in dairy samples from the united states and europe are comparable, there is a difference in the contribution of individual congeners to the i-t ... | 2018 | 9134675 |
| 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 |
| pcdd, pcdf, and pcb in farm-raised catfish from southeast united states--concentrations, sources, and cyp1a induction. | nine catfish fillets, three catfish nuggets, two feed samples, and one pond sediment were analyzed for pcdd, pcdf, and pcb. farm-raised catfish from mississippi, alabama, and arkansas contained significant levels of 2,3,7,8-substituted pcdd and pcdf. in addition, a large number of non-2,3,7,8-substituted congeners were present in all samples. the catfish fillets and catfish nuggets also contained high concentrations of dioxin-like pcb, as well as a number of non-dioxin-like pcb. the teq based on ... | 2018 | 9828294 |
| 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 |
| 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 |
| association of pesticide exposure and risk of breast cancer mortality in mississippi. | breast cancer is the most common form of cancer among women in the united states. established risk factors include advancing age, early menarche, late menopause, positive first relative, late age of first birth and socioeconomic status. mississippi has a combination of risk factors making it suitable for studying the pathways of breast cancer etiology. the purpose of this study was to analyze pesticide exposure and the risk of breast cancer mortality. data for this study consisted of secondary a ... | 2003 | 12724926 |
| 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 |