Publications

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retention of salmonella typhimurium by certain species of fish and shrimp.marine fish (mugil cephalus, fundulus heteroclitus, trachinotus carolinus), lake shrimp (penaeus setiferus), and channel catfish (ictalurus lacustris punctatus) were exposed to salmonella typhimurium and cultured after 2 hours and at daily intervals for 30 days. salmonella typhimurium was recovered from all exposed animals after 2 hours and for 30 days in all animals except p setifurus. the organisms could not be recovered from those shrimp after the initial sampling period. apparent salmonellos ...19751100577
metabolic profiles of penaied shrimp: dietary lipids and ovarian maturation.the major impediment to the culture of penaeid shrimp in captivity in the united states has been an inability to obtain ovarian maturation and spawning. lipid profiles of tissues (gonads, hepatopancreas, and tail muscle) of penaeus setiferus caught at sea have shown that cholesterol is the dominant sterol and that polyunsaturated fatty acids known to be essential in man comprise a significant portion of the fatty acid fraction. a prioprietary marine ration contains cholesterol, but is devoid of ...19807410512
susceptibility to taura syndrome virus of some penaeid shrimp species native to the gulf of mexico and the southeastern united statesexperimental studies demonstrated that penaeus setiferus, but not penaeus aztecus or penaeus duorarum, could be killed by taura syndrome virus (tsv). however, specimens of p. setiferus that survived infection and both p. aztecus and p. duorarum at least 79 days postexposure that did not demonstrate gross signs of infection were shown to harbor virus by bioassay using penaeus vannamei, a highly susceptible target host. consequently, all three of those penaeids native to the southeast united state ...19979056467
broad antiviral activity in tissues of crustaceans.innate antiviral substances occur in vertebrates and may function as host defenses. virus infections are common among invertebrates, but little is known about the ability of invertebrates to control viral infections. pre-existing antiviral substances may be particularly important, since invertebrates lack the antiviral defense conferred by specific immunity. in our study, we found that tissue extracts of blue crab (callinectes sapidus), shrimp (penaeus setiferus), and crayfish (procambarus clark ...200011080539
putrescine, cadaverine, and indole production by bacteria isolated from wild and aquacultured penaeid shrimp stored at 0, 12, 24, and 36 degrees c.putrescine, cadaverine, and indole production capabilities of bacteria isolated from wild domestic and aquacultured ni-caraguan penaeid shrimp in progressive decomposition states were evaluated. the numbers and types of microorganisms responsible for the production of putrescine, cadaverine, and indole in wild and aquacultured shrimp increased with increasing decomposition temperature and time. throughout the storage experiments, mean aerobic plate counts (log/g) ranged from 4.5 to 9.7 and 4.5 t ...200414717362
a new class (penaeidin class 4) of antimicrobial peptides from the atlantic white shrimp (litopenaeus setiferus) exhibits target specificity and an independent proline-rich-domain function.a highly pure, chemically defined representative of a new class of antimicrobial peptide from the atlantic white shrimp (litopenaeus setiferus), penaeidin class 4 [pen4-1 (penaeidin class 4 isoform 1)], was produced synthetically. chemical synthesis was achieved by native ligation from two separate domains yielding a bioactive peptide that reflected the characteristics of native penaeidin. synthetic pen4-1 proved to be an effective antimicrobial peptide, particularly against the broad-spectrum p ...200415084144
ecological risk assessment of neem-based pesticides.a tiered process was used to evaluate the risks of pure azadirachtin (aza) and two neem-based insecticides (neemix and bioneem) on six aquatic animals [crayfish (procambarus clarkii), white shrimp (penaeus setiferus), grass shrimp (palaemonetes pugio), blue crabs (callinectes sapidus), water fleas (daphnia pulex), and mosquito larvae (culex quinquefasciatus)] through short term acute toxicity tests. the risk was calculated using the level of concern endpoints (q values) and relative hazard index ...200415132337
sampling and evaluation of white spot syndrome virus in commercially important atlantic penaeid shrimp stocks.in 1997, white spot syndrome virus (wssv) was discovered in shrimp culture facilities in south carolina, usa. this disease was known to cause devastating mortalities in cultured populations in southeast asia and prompted concern for the health of wild populations in the usa. our study surveyed wild shrimp populations for the presence of wssv by utilizing molecular diagnostics and bioassay techniques. a total of 1150 individuals (586 litopenaeus setiferus, 477 farfantepenaeus aztecus and 87 f. do ...200415264713
preliminary studies of biochemical changes (ethoxycoumarin o-deethylase activities and vitellogenin induction) in two species of shrimp (farfantepenaeus duorarum and litopenaeus setiferus) from the gulf of mexico.several investigations have demonstrated that the increase in chemicals in the environment may have caused effects on aquatic life and wildlife. the impact from oil production activities on the benthic community structure and shrimp (farfantepenaeus duorarum and litopenaeus setiferus) biochemical markers were studied in the gulf of mexico, which is heavily contaminated by polycyclic aromatic hydrocarbons and heavy metals. shrimp were collected from a control area and from an area close to oil pr ...200515814315
purification and characterization of a lectin from the white shrimp litopenaeus setiferus (crustacea decapoda) hemolymph.a 291-kda lectin (lsl) was purified from the hemolymph of the white shrimp litopenaeus setiferus by affinity chromatography on glutaraldehyde-fixed stroma from rabbit erythrocytes. lsl is a heterotetramer of two 80-kda and two 52-kda subunits, with no covalently-liked carbohydrate, and mainly composed by aspartic and glutamic acids, glycine and alanine, with relatively lower methionine and cysteine contents. edman degradation indicated that the nh2-terminal of the 80-kda subunit is composed dasn ...200515919156
field investigation on the toxicity of alaska north slope crude oil (ansc) and dispersed ansc crude to gulf killifish, eastern oyster and white shrimp.a field investigation was conducted on a louisiana spartina alterniflora shoreline to evaluate the toxic effects of crude oil (alaska north slope crude oil, ansc) and dispersed oil (ansc + dispersant corexit 9,500) on three aquatic species indigenous to the gulf of mexico: fundulus grandis (gulf killifish), crassostrea virginica (eastern oyster), and litopenaeus setiferus (white shrimp). results indicated that total hydrocarbons concentration value in oiled treatments decreased rapidly in 3h and ...200616098561
white-spot syndrome virus (wssv) introduction into the gulf of mexico and texas freshwater systems through imported, frozen bait-shrimp.we analysed 20 boxes of, frozen imported bait-shrimp (china: parapenaeopsis sp. and metapenaeopsis sp.) and 8 boxes of native, frozen bait-shrimp (gulf of mexico: litopenaeus setiferus and farfantepenaeus duorarum) by rt-pcr or pcr for taura syndrome virus (tsv), yellowhead virus/gill-associated virus (yhv/gav), white-spot syndrome virus (wssv) and infectious hypodermal and hematopoietic necrosis virus (ihhnv). all 28 boxes of shrimp were negative for tsv, yhv/gav and ihhnv; 2 boxes of imported ...200616956056
discovery of synthetic penaeidin activity against antibiotic-resistant fungi.penaeidins are antimicrobial peptides from shrimp that are constituted by divergent classes of peptide isoforms in an individual organism. penaeidin sequence variation suggests functional diversity in the host and promises differential activities if applied to treat infections in humans. we have synthesized isoform 4 of penaeidin class 3 from the atlantic shrimp, litopenaeus setiferus, by native ligation using three peptide segments. our synthesis approach led to the discovery of an irreversible ...200616999777
the use of monoclonal antibodies anti-lectin from freshwater prawn macrobrachium rosenbergii (deman, 1879) in the recognition of protein with lectin activity in decapod's hemolymph.we determined the cross-reactivity of a monoclonal antibody against the macrobrachium rosenbergii lectin with proteins in the hemolymph from procambarus clarkii (pc), procambarus americanus (pa), litopenaeus setiferus (ls), and pseudothelphusa americana (psa). crustaceans' hemolymph agglutinated erythrocytes from rat, mouse, guinea pig, and rabbit. decapods' hemolymph hemagglutinating activity was inhibited by n-acetylated carbohydrates as well as by antibodies. western blot assays indicated tha ...200919431046
pulsed ultraviolet light reduces immunoglobulin e binding to atlantic white shrimp (litopenaeus setiferus) extract.pulsed ultraviolet light (puv), a novel food processing and preservation technology, has been shown to reduce allergen levels in peanut and soybean samples. in this study, the efficacy of using puv to reduce the reactivity of the major shrimp allergen, tropomyosin (36-kda), and to attenuate immunoglobulin e (ige) binding to shrimp extract was examined. atlantic white shrimp (litopenaeus setiferus) extract was treated with puv (3 pulses/s, 10 cm from light source) for 4 min. tropomyosin was compa ...201121845146
Expression of a novel antimicrobial peptide Penaeidin4-1 in creeping bentgrass (Agrostis stolonifera L.) enhances plant fungal disease resistance.Turfgrass species are agriculturally and economically important perennial crops. Turfgrass species are highly susceptible to a wide range of fungal pathogens. Dollar spot and brown patch, two important diseases caused by fungal pathogens Sclerotinia homoecarpa and Rhizoctonia solani, respectively, are among the most severe turfgrass diseases. Currently, turf fungal disease control mainly relies on fungicide treatments, which raises many concerns for human health and the environment. Antimicrobia ...201121931807
survey of protozoan, helminth and viral infections in shrimp litopenaeus setiferus and prawn macrobrachium acanthurus native to the jamapa river region, mexico.we surveyed protozoan and metazoan parasites as well as white spot syndrome virus (wssv) and infectious hypodermal hematopoietic necrosis virus (ihhnv) in white shrimp litopenaeus setiferus and the palaemonid prawn macrobrachium acanthurus native to the lower jamapa river region of veracruz, mexico. the presence of parasites and the infection parameters were evaluated in 113 palaemonid prawns collected during the northwind (n = 45), rainy (n = 38) and dry seasons (n = 30) between october 2007 an ...201122013749
cdna cloning, characterization and expression analysis of a novel antimicrobial peptide gene penaeidin-3 (fi-pen3) from the haemocytes of indian white shrimp fenneropenaeus indicus.a new member of antimicrobial peptide genes of the penaeidin family, penaeidin 3, was cloned from the haemocytes of indian white shrimp fenneropeneaus indicus (f. indicus), by reverse transcription pcr (rt-pcr) and rapid amplification of cdna end (race-pcr) methods. the complete nucleotide sequence of cdna clone of indian white shrimp f. indicus penaeidin 3 (fi-pen3) was 243bp long and has an open reading frame which encodes 80 amino acid peptide. the homology analysis of fi-pen3 sequence with o ...201121885268
analysis of the effect of three different allosteric ligands on oxygen binding by hemocyanin of the shrimp, penaeus setiferus. 200027208
diversity in penaeidin antimicrobial peptide form and function.penaeidins are a diverse family of two-domain antimicrobial peptides expressed in shrimp. variation in penaeidin sequence results in functional diversity, which was discovered using synthetic reproductions of native penaeidins. an isoform of penaeidin class 3 from litopenaeus setiferus (litset pen3-4) was synthesized using native ligation and compared directly with the synthetic penaeidin class 4 known to be expressed in the same organism. new antimicrobial activity data are included in this rev ...200717716729
blue crabs callinectes sapidus as potential biological reservoirs for white spot syndrome virus (wssv).white spot syndrome virus (wssv) is a virulent pathogen of cultured shrimp and was first detected in farms in south carolina (usa) in 1997 and subsequently in wild shrimp in 1999. we screened groups of 1808 wild atlantic white shrimp litopenaeus setiferus and 300 blue crabs callinectes sapidus collected from south carolina, georgia, and florida for the presence of wssv using the shrimple® immunoassay-strip test, with all positives and random subsets of negatives tested by taqman real-time pcr an ...201525751859
crustins, homologues of an 11.5-kda antibacterial peptide, from two species of penaeid shrimp, litopenaeus vannamei and litopenaeus setiferus.the response of crustaceans to pathogens is believed to depend solely on innate, nonadaptive immune mechanisms, including phagocytosis, encapsulation, clotting, and a variety of soluble antimicrobial activities. arthropod antimicrobial peptides, while characterized primarily from insects, also have been isolated from crustaceans. expressed sequence tag analysis of hemocyte complementary dna libraries from 2 species of shrimp, litopenaeus vannamei and litopenaeus setiferus, revealed transcripts w ...200214961261
wood preservative leachates from docks in an estuarine environment.environmental concentrations and biological effects of certain metals and organic compounds found in wood preservatives were examined. the study focused on leachates from private residential docks in south carolina tidal creeks. copper, chromium, arsenic, and polynuclear aromatic hydrocarbons (pahs) were measured in composite samples of surficial sediments and naturally occurring oyster populations (crassostrea virginica) from creeks with high densities of docks, and from nearby reference creeks ...19968687987
variations in the microbial log reduction curves of irradiated cod fillets, shrimp, and their respective homogenates.when cod (gadus morhua morhua) and headless white shrimp (penaeus setiferus) were gamma irradiated with a series of low-ionizing radiation doses, a "shoulder(s)" was observed in the graph (log microbial counts versus dose) in the approximate range of 25 to 75 krads. when the microbiological survivors were differentiated into total counts, proteolytic and pseudomonad-type bacteria, it was observed that the pseudomonad-type bacteria were rapidly destroyed by 25 krads and that proteolytic bacteria ...1977848955
detection of a new microsporidium perezia sp. in shrimps penaeus monodon and p. indicus by histopathology, in situ hybridization and pcr.samples of microsporidia-infected shrimps exhibiting clinical signs of cotton shrimp disease were collected from madagascar, mozambique, and the kingdom of saudi arabia from 2005 to 2014. the tails of the infected shrimps appeared opaque and whitish; subsequent histological examination revealed the presence of cytoplasmic inclusions and mature spores in tissues of the muscle, hepatopancreas, gills, heart, and lymphoid organ. pcr analysis targeting the small subunit rdna (ssu rdna) from infected ...201627409240
position of larval tapeworms, polypocephalus sp., in the ganglia of shrimp, litopenaeus setiferus.parasites that invade the nervous system of their hosts have perhaps the best potential to manipulate their host's behavior, but how they manipulate the host, if they do at all, could depend on their position within the host's nervous system. we hypothesize that parasites that live in the nervous system of their host will be randomly distributed if they exert their influence through non-specific effects (i.e., general pathology), but that their position in the nervous system will be non-random i ...201424820854
polypocephalus sp. infects the nervous system and increases activity of commercially harvested white shrimp (litopenaeus setiferus).larval tapeworms (polypocephalus sp.) reside within the central nervous system of decapod crustaceans. living within the nervous system would seem to create an excellent opportunity for the parasites to manipulate the behavior of their hosts, so we tested the hypothesis that behavior of white shrimp ( litopenaeus setiferus ) would be correlated with the level of parasitic infection. we videorecorded the behavior of l. setiferus for 8 hr, then examined the nervous system and digestive glands for ...201121506800
do decapod crustaceans have nociceptors for extreme ph?nociception is the physiological detection of noxious stimuli. because of its obvious importance, nociception is expected to be widespread across animal taxa and to trigger robust behaviours reliably. nociception in invertebrates, such as crustaceans, is poorly studied.201020422026
heliconema brooksi n. sp. (nematoda: physalopteridae) from the ophichthid eel ophichthus gomesi in the gulf of mexico.heliconema brooksi n. sp. is described from the shrimp eel, ophichthus gomesi, in mississippi sound. this species is distinguished from other members of the genus by possessing in the male 40 or more tessellated longitudinal ridges, a spicule ratio averaging 1:10.6, 4 precloacal papillae, and 6 postcloacal papillae. females have a protruding vulvular flap. both sexes have a prominent sclerotized cardium. heliconema brooksi is morphologically most closely related to heliconema heliconema. a juven ...19911992094
a ten-month diseases survey on wild litopenaeus setiferus (decapoda: penaeidae) from southern gulf of mexico.the development of shrimp aquaculture in mexican coasts of the gulf of mexico began to be explored using the pacific white shrimp litopenaeus vannamei in the mid 90's. many concerns over the risk of disease transmission to the economically important native penaeids, have been the main deterrent for the aquaculture of l. vannamei in the region. concurrently, more than 10 years of research experience on the aquaculture suitability of the native litopenaeus setiferus from the terminos lagoon, in th ...201324027916
filtering out parasites: sand crabs (lepidopa benedicti) are infected by more parasites than sympatric mole crabs (emerita benedicti).two digging decapod crustaceans, the sand crab species lepidopa benedicti and the mole crab species emerita benedicti, both live in the swash zone of fine sand beaches. they were examined for two parasites that infect decapod crustaceans in the region, an unidentified nematode previously shown to infect l. benedicti, and cestode tapeworm larvae, polypocephalus sp., previously shown to infect shrimp (litopenaeus setiferus). lepidopa benedicti were almost always infected with both parasite species ...201728951818
population genetic analysis of white shrimp, litopenaeus setiferus, using microsatellite genetic markers.the white shrimp (litopenaeus setiferus) is a commercially and recreationally valuable species, yet little is known of its population structure or genetic diversity. white shrimp are distributed along the atlantic coast of the united states and from the west coast of florida to the bay of campeche, mexico. in this study, shrimp were collected from north carolina, south carolina (four separate collections were taken from 1995 to 1999), georgia, the atlantic and gulf coasts of florida, louisiana, ...200312919471
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