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Satoshi Kawato, Reiko Nozaki, Hidehiro Kondo, Ikuo Hirono
Vibrio penaeicida is a bacterial pathogen of cultured shrimp. The draft genome sequence of V. penaeicida strain TUMSAT-NU1 consists of 100 scaffolds with a total of 6.41 Mbp. We identified possible virulence factors, and we found that V. penaeicida and Vibrio nigripulchritudo are closely related.
March 15, 2018: Genome Announcements
Ashok Kumar Jangam, T Bhuvaneswari, A Navaneeth Krishnan, Vinaya Kumar Katneni, Satheesha Avunje, Monendra Grover, Sujeet Kumar, S V Alavandi, K K Vijayan
Here, we report the draft genome sequence of an isolate of Vibrio parahaemolyticus , VP14, recovered from the gut of Penaeus vannamei shrimp farmed in southern India. The genome of VP14 comprised 5,224,046 bp with a GC content of 45.3% and contained 5,326 genes, including 4,972 coding sequences.
March 15, 2018: Genome Announcements
Jing-Rong Kong, Wei Wei, Xue-Li Qiao, Huan Kang, Di Huang, Yuan Liu, Wei-Na Wang
It is well known that PI3K regulates various processes in mammalian cells by generating a secondary messenger that later activates AKT. However, its innate immune function in crustaceans remains unclear. We report the characterization of Litopenaeus vannamei PI3K (LvPI3K) for investigating how PI3K participates in the innate immunity of crustaceans. Full-length LvPI3K cDNA was 3357 bp long, with a 3222 bp open reading frame (ORF) that encodes a putative protein of 1292 amino acids. The PI3K catalytic domain (PI3Kc) of LvPI3K was found to be rather conserved when the PI3Ks from other species were analyzed...
March 12, 2018: Fish & Shellfish Immunology
Sarah L Bornbusch, Jonathan S Lefcheck, J Emmett Duffy
Eusociality, one of the most complex forms of social organization, is thought to have evolved in several animal clades in response to competition for resources and reproductive opportunities. Several species of snapping shrimp in the genus Synalpheus, the only marine organisms known to exhibit eusociality, form colonies characterized by high reproductive skew, and aggressive territoriality coupled with cooperative defense. In eusocial Synalpheus colonies, individual reproduction is limited to female 'queens', whose fecundity dictates colony growth...
2018: PloS One
Guo Yan-Li, Zou Yong-Gen, Xie Yi-Qing, Chen Hong, He Ming-Zhen, Lü Lai-Fu, Huang Li-Zhong, Jin Xiao-Lin
OBJECTIVE: To investigate the prevalence of major parasitic diseases and related knowledge, attitude and practice among rural residents in Liyang City, so as to provide the evidence for formulating appropriate preventive strategies and measures. METHODS: Three villages were selected from three towns as survey sites, and the residents who were above three years old and had been in the village for over six months were investigated. The Kato-Katz technique was applied to detect intestinal parasite eggs in residents' feces, and the cellophane anal swab was used to detect Enterobius vermicularis eggs among children aged 3-6 years...
September 27, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Jeffrey K Wickliffe, Bridget Simon-Friedt, Jessi L Howard, Ericka Frahm, Buffy Meyer, Mark J Wilson, Deepa Pangeni, Edward B Overton
Following oil spills such as the Deepwater Horizon accident (DWH), contamination of seafood resources and possible increased health risks attributable to consumption of seafood in spill areas are major concerns. In this study, locally harvested finfish and shrimp were collected from research participants in southeast Louisiana and analyzed for polycyclic aromatic hydrocarbons (PAHs). PAHs are some of the most important chemicals of concern regarding oil-spill-contaminated seafood resources during and following oil spills...
March 13, 2018: Risk Analysis: An Official Publication of the Society for Risk Analysis
Maria Soledad Morales-Covarrubias, María Del Carmen Bolan-Mejía, Ana Isabel Vela Alonso, Jose F Fernandez-Garayzabal, Bruno Gomez-Gil
Strain CAIM 1838T , isolated from the hepatopancreas of a cultured diseased Pacific white shrimp (Penaeusvannamei), was subjected to characterization by a polyphasic taxonomic approach. On the basis of 16S rRNA gene sequence analysis, strain CAIM 1838T was most closely related to Streptococcus bovimastitidis 99.3 % and to other species of the Pyogenes clade of Streptococcus with lower similarity values. Average nucleotide identity values and the genome-to-genome distance of strain CAIM 1838T , as compared with the type strains, confirmed the separate species status with closely related species of the genus Streptococcus and were all below the thresholds to delimit a species, 93...
March 13, 2018: International Journal of Systematic and Evolutionary Microbiology
N Mejrhit, O Azdad, L Aarab
Objectives. The aim of this work was to study the effect of industrial processing on the allergenicity of three commonly consumed Moroccan fish species in Fez region (sardine, common pandora, and shrimp). Methods. This work was conducted by a sera-bank obtained from 1248 patients recruited from Fez Hospitals. Their sera were analyzed for specific IgE binding to raw fish extracts. Among them, 60 patients with higher specific IgE levels were selected, and used to estimate the binding variation of IgE to these products under several processing (frying, cooking, canning, marinade, and fermentation) using ELISA analysis...
March 2, 2018: European Annals of Allergy and Clinical Immunology
Pattana Jaroenlak, Dominic Wiredu Boakye, Rapeepun Vanichviriyakit, Bryony A P Williams, Kallaya Sritunyalucksana, Ornchuma Itsathitphaisarn
BACKGROUND: The microsporidian Enterocytozoon hepatopenaei (EHP) is a spore-forming, intracellular parasite that causes an economically debilitating disease (hepatopancreatic microsporidiosis or HPM) in cultured shrimp. HPM is characterized by growth retardation and wide size variation that can result in economic loss for shrimp farmers. Currently, the infection mechanism of EHP in shrimp is poorly understood, especially at the level of host-parasite interaction. In other microsporidia, spore wall proteins have been reported to be involved in host cell recognition...
March 12, 2018: Parasites & Vectors
Gabriella Di Lena, Irene Casini, Roberto Caproni, Elena Orban
This study investigated mercury contamination levels in eight commercially valuable Crustacean species caught off the Central Adriatic and Tyrrhenian coasts of Italy. Total mercury levels were measured by Thermal Decomposition-Amalgamation-Atomic Absorption Spectrophotometry. Results showed a high variability among species with values ranging between 0.070 and 1.24 (mg kg-1 wet weight). The lowest mercury levels were detected in caramote prawn (Penaeus kerathurus), warty crab (Eriphia verrucosa) and European spider crab (Maja squinado), decapods living in shallow waters...
March 12, 2018: Food Additives & Contaminants. Part B, Surveillance
Regina Elizondo-González, Eduardo Quiroz-Guzmán, Cristina Escobedo-Fregoso, Paola Magallón-Servín, Alberto Peña-Rodríguez
Two experimental feeding trials were conducted during four weeks to evaluate the use of Ulva lactuca in shrimp culture: (1) for wastewater bioremediation, and (2) using different inclusion levels of U. lactuca meal in shrimp feed. In feeding trial 1, shrimp reared under seaweed U. lactuca water exchange in a re-circulation system (SWE) resulted in similar growth and feed utilization as shrimp reared with clean water exchange (CWE). Shrimp under no water exchange (NWE) resulted in significant lower growth and higher feed conversion rate (FCR) compared to the other treatments ( p  < 0...
2018: PeerJ
'Ale'alani Dudoit, Matthew Iacchei, Richard R Coleman, Michelle R Gaither, William E Browne, Brian W Bowen, Robert J Toonen
The banded coral shrimp, Stenopus hispidus (Crustacea: Decapoda: Stenopodidea) is a popular marine ornamental species with a circumtropical distribution. The planktonic larval stage lasts ∼120-253 days, indicating considerable dispersal potential, but few studies have investigated genetic connectivity on a global scale in marine invertebrates. To resolve patterns of divergence and phylogeography of S. hispidus , we surveyed 525 bp of mitochondrial cytochrome c oxidase subunit I (COI) from 198 individuals sampled at 10 locations across ∼27,000 km of the species range...
2018: PeerJ
Andrew E Christie, Micah G Pascual, Andy Yu
Peptides are the largest/most diverse class of molecules used by animals for chemical communication, and with their cognate receptors, are key players in modulating physiological/behavioral control systems, including those involved in adaptation to environmental change. Crustaceans have long served as models for investigating peptidergic control of physiology/behavior, and members of Notostraca, an ancient branchiopod order, have recently been proposed as models for investigating the genetic/physiological underpinnings of ecoresponsiveness; nothing is currently known about the genes/proteins underlying peptidergic signaling in any member of this crustacean taxon...
March 8, 2018: Marine Genomics
Yafei Duan, Yun Wang, Jiasong Zhang, Qingsong Liu, Xian Ding
The shrimp intestine barrier serves as the first line of the host defense against pathogen infection. Lipopolysaccharide (LPS) is the cell wall component of gram-negative bacteria, which known as endotoxin and induce the intestine inflammation. In this study, the acute toxicity effects of LPS injection on the morphology, digestive enzymes and immunological responses of intestine from Litopenaeus vannamei was investigated. HE stain showed that LPS injection damaged the intestine connective and epithelium tissue...
March 8, 2018: Journal of Invertebrate Pathology
Renée Katrin Bechmann, Emily Lyng, Stig Westerlund, Shaw Bamber, Mark Berry, Maj Arnberg, Alfhild Kringstad, Piero Calosi, Paul J Seear
Increasing use of fish feed containing the chitin synthesis inhibiting anti-parasitic drug diflubenzuron (DFB) in salmon aquaculture has raised concerns over its impact on coastal ecosystems. Larvae of Northern shrimp (Pandalus borealis) were exposed to DFB medicated feed under Control conditions (7.0 °C, pH 8.0) and under Ocean Acidification and Warming conditions (OAW, 9.5 °C and pH 7.6). Two weeks' exposure to DFB medicated feed caused significantly increased mortality. The effect of OAW and DFB on mortality of shrimp larvae was additive; 10% mortality in Control, 35% in OAW, 66% in DFB and 92% in OAW + DFB...
February 28, 2018: Aquatic Toxicology
Thi Thu Hang Pham, Pierre Rossi, Hoang Dang Khoa Dinh, Ngoc Tu Anh Pham, Phuong Anh Tran, To Thi Khai Mui Ho, Quoc Tuc Dinh, Luiz Felippe De Alencastro
In Vietnam, intensive shrimp farms heavily rely on a wide variety of antibiotics (ABs) to treat animals or prevent disease outbreak. Potential for the emergence of multi-resistant bacteria is high, with the concomitant contamination of adjacent natural aquatic habitats used for irrigation and drinking water, impairing in turn human health system. In the present study, quantification of AB multi-resistant bacteria was carried out in water and sediment samples from effluent channels connecting a shrimp farming area to the Vam Co River (Long An Province, Vietnam)...
March 7, 2018: Journal of Environmental Management
Olfa Ben Braïek, Paola Cremonesi, Stefano Morandi, Slim Smaoui, Khaled Hani, Taoufik Ghrairi
This study aims to characterise a potential bacteriocinogenic lactic acid bacterial strain isolated from a raw pink shrimp (Palaemon serratus) and evaluate its safety aspect. The strain designated as 4CP3 was noted to display antibacterial activities (P < 0.05) against Gram-positive and Gram-negative foodborne pathogens (Listeria monocytogenes and Pseudomonas aeruginosa) and some filamentous fungi (e.g. Aspergillus niger A79). Phenotypic and molecular techniques as well as phylogenetic analysis identified the isolate 4CP3 as Enterococcus lactis...
March 7, 2018: Microbial Pathogenesis
Chien Thang Doan, Thi Ngoc Tran, Van Bon Nguyen, Anh Dzung Nguyen, San-Lang Wang
Chitosanases and proteases have received much attention due to their wide range of applications. Four kinds of chitinous materials, squid pens, shrimp heads, demineralized shrimp shells and demineralized crab shells, were used as the sole carbon and nitrogen (C/N) source to produce chitosanases, proteases and α-glucosidase inhibitors (αGI) by four different strains of Paenibacillus . Chitosanase productivity was highest in the culture supernatants using squid pens as the sole C/N source. The maximum chitosanase activity of fermented squid pens (0...
March 8, 2018: Marine Drugs
Thi Thu Tra Vu, Thomas Alter, Stephan Huehn
This study was conducted to determine the prevalence of Vibrio spp. in retail seafood in Berlin, Germany. A total of 160 raw seafood samples from supermarkets and seafood shops, consisting of shrimp ( n = 80) and bivalves ( n = 80), were investigated for the presence of Vibrio spp. using the International Organization for Standardization ISO/TS 21872 method and a multiplex PCR. The overall prevalence of Vibrio spp. in retail seafood was 55% (95% CI: 47.2 to 62.8%). The prevalence of Vibrio spp. in shrimp was slightly higher than in bivalves (57...
March 8, 2018: Journal of Food Protection
Wenfang Dai, Weina Yu, Lixia Xuan, Zhen Tao, Jinbo Xiong
It is now recognized that some gut diseases attribute to polymicrobial pathogens infections. Thus, traditional isolation of single pathogen from disease subjects could bias the identification of causal agents. To fill this gap, using Illumina sequencing of the bacterial 16S rRNA gene, we explored the dynamics of gut bacterial communities over a shrimp disease progression. The results showed significant differences in the gut bacterial communities between healthy and diseased shrimp. Potential pathogens were inferred by a local pathogens database, of which two OTUs (affiliated with Vibrio tubiashii and Vibrio harveyi) exhibited significantly higher abundances in diseased shrimp as compared to healthy subjects...
March 7, 2018: Applied Microbiology and Biotechnology
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