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Aeromonas hydrophila

Lin Zheng, Lin Feng, Wei-Dan Jiang, Pei Wu, Ling Tang, Sheng-Yao Kuang, Yun-Yun Zeng, Xiao-Qiu Zhou, Yang Liu
This study aimed to investigate the effects of dietary selenium on resistance to skin haemorrhages and lesions and on immune function as well as the underlying mechanisms of those effects in the head kidney, spleen and skin of young grass carp (Ctenopharyngodon idella). A total of 540 healthy grass carp with initial body weight (226.48 ± 0.68 g) were randomly divided into six groups and fed six separate diets with graded dietary levels of selenium (0.025, 0.216, 0.387, 0.579, 0.795 and 1.049 mg/kg diet) for 80 days...
March 17, 2018: Fish & Shellfish Immunology
Shengjian Yuan, Ling Chen, Quan Liu, Yan Zhou, Jingfang Yang, Deng Deng, Hongping Li, Yingfei Ma
In this study, two bacteriophage isolates, AhSzq-1 and AhSzw-1 that specifically infect Aeromonas hydrophila strain KT998822, were isolated from seawater and characterized. One-step growth curves showed that the latent period of AhSzq-1 and AhSzw-1 are 50 min and 60 min, respectively. The sequence similarities between AhSzq-1 and AhSzw-1 were 88% at the DNA and 83% at the protein level, suggesting that these two phages are representatives of two different species. The virion morphology, DNA genome size and terminal repeats of these two phages are similar to those of viruses classified as T5virus phages...
March 19, 2018: Archives of Virology
Ram Naresh Bharagava, Sujata Mani, Sikandar I Mulla, Ganesh Dattatraya Saratale
This study deals the biodegradation of crystal violet dye by a ligninolytic enzyme producing bacterium isolated from textile wastewater that was characterized and identified as Aeromonas hydrophila based on the 16 S rRNA gene sequence analysis. The degradation of crystal violet dye was studied under different environmental and nutritional conditions, and results showed that the isolated bacterium was effective to decolourize 99% crystal violet dye at pH 7 and temperature 35 °C in presence of sucrose and yeast extract as C and N source, respectively...
March 15, 2018: Ecotoxicology and Environmental Safety
Nermeen M Abu-Elala, Huda O AbuBakr, Marwa S Khattab, Samah H Mohamed, Maha A El-Hady, Rehab A Ghandour, Rania E Morsi
Despite the potential antimicrobial and water purification benefits of chitosan-based nanocomposites, there are growing concerns regarding the hazards of leached nanoparticles (NPs) to the in-contact circumference. The antibacterial performance of the nanocomposites of chitosan with silver and copper NPs and carbon nanotubes was assessed with an emphasis on their impact on fish health. The minimal inhibitory concentrations of each preparation and the growth curves of Aeromonas hydrophila exposed to different nanocomposites were measured...
March 12, 2018: International Journal of Biological Macromolecules
Shuang-An Li, Wei-Dan Jiang, Lin Feng, Yang Liu, Pei Wu, Jun Jiang, Sheng-Yao Kuang, Ling Tang, Wu-Neng Tang, Yong-An Zhang, Juan Yang, Xu Tang, He-Qun Shi, Xiao-Qiu Zhou
In this study, we investigated the effects of dietary myo-inositol on the intestinal immune barrier function and related signaling pathway in young grass carp (Ctenopharyngodon idella). A total of 540 young grass carp (221.33 ± 0.84 g) were fed six diets containing graded levels of myo-inositol (27.0, 137.9, 286.8, 438.6, 587.7 and 737.3 mg/kg) for 10 weeks. After the growth trial, fish were challenged with Aeromonas hydrophila. The results indicated that compared with the optimal dietary myo-inositol level, myo-inositol deficiency (27...
March 12, 2018: Fish & Shellfish Immunology
V Jung-Schroers, M Adamek, S Harris, H Syakuri, A Jung, I Irnazarow, D Steinhagen
The effect of dietary β-glucan on the bacterial community in the gut of common carp (Cyprinus carpio) was examined after oral application of Aeromonas hydrophila. Carp received either feed supplemented with 1% MacroGard® , a β-1,3/1,6-glucan, or a β-glucan-free diet. Fourteen days after feeding, half of the carp from each group were intubated with 109 colony-forming units (CFU) of a pathogenic strain of A. hydrophila. Gut samples were taken 12 hr to 7 days after application and analysed using microbiological and molecular biological techniques (NGS, RT-PCR-DGGE)...
March 15, 2018: Journal of Fish Diseases
Peng Zhang, Yu Liu, Min Wang, Miren Dong, Zhaoqun Liu, Zhihao Jia, Weilin Wang, Anguo Zhang, Lingling Wang, Linsheng Song
Iron-sulphur clusters (ISCs), one of the oldest and most versatile cofactors of proteins, are involved in catalysis reactions, electron transport reactions, regulation processes as well as sensing of ambient conditions. Iron-sulphur cluster assembly protein (IscA) is a scaffold protein member of ISC formation system, which plays a significant role in the assembly and maturation process of ISC proteins. In the present study, the cDNA sequence of iron-sulphur cluster assembly protein 2 (designated as EsIscA2) was cloned from Eriocheir sinensis...
March 9, 2018: Developmental and Comparative Immunology
Shuhuan Zhang, Qiaoqing Xu, Elisa Boscari, Hao Du, Zhitao Qi, Youshen Li, Jun Huang, Jun Di, Huamei Yue, Chuangju Li, Leonardo Congiu, Qiwei Wei
Dabry's sturgeon (Acipenser dabryanus) is mainly distributed in the upper Yangtze River. Although extensively farmed, little information is available on its innate immune system. In this study, we conducted de novo transcriptome assembly of the head kidney to create a comprehensive dataset for A. dabryanus. A total of 51,324,686 high quality reads were obtained from head kidney cDNA library by the Illumina sequencing platform and 131,261 unigenes were determined to contain complete ORFs. The complete coding sequences of g- and c-type lysozymes were identified from unigenes, and designated as ADLysG and ADLysC...
March 8, 2018: Fish & Shellfish Immunology
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
Mahalingam Anjugam, Baskaralingam Vaseeharan, Arokiadhas Iswarya, Narayanan Gobi, Mani Divya, Merlin P Thangaraj, Preetham Elumalai
Recently, several immunostimulants such as β-glucan, microbial and plant products have been used as dietary supplements to combat disease outbreaks in aquaculture. The present study investigates the potential of Portunus pelagicus β-1, 3 glucan binding protein based zinc oxide nanoparticles (Ppβ-GBP-ZnO NPs) supplemented diet on growth, immune response and disease resistance in Mozambique tilapia, Oreochromis mossambicus. The immune-related protein β-GBP was purified from the haemolymph of P. pelagicus using Sephadex G-100 affinity column chromatography...
March 5, 2018: Fish & Shellfish Immunology
María F Bergero, Gloria I Lucchesi
Adsorption of cationic surfactants (QACs) Br-tetradecyltrimethylammonium (TTAB), Cl-tetradecylbenzyldimethylammonium (C14 BDMA) and Cl-hexadecylbenzyldimethylammonium (C16 BDMA) to activated sludge from a wastewater treatment plant was tested. Adsorption equilibrium was reached after 2 h, and for initial 200 mg L-1 81%, 90% and 98% of TTAB, C14 BDMA and C16 BDMA were respectively adsorbed. After six successive desorption cycles, 21% of TTAB and 12.7% of C14 BDMA were desorbed from the sludge. In agreement with the percentage of QACs pre-adsorbed, the more hydrophobic the compound, the lesser the extent of desorption...
March 5, 2018: Journal of Biotechnology
Yu Liu, Peng Zhang, Weilin Wang, Miren Dong, Min Wang, Changhao Gong, Zhihao Jia, Zhaoqun Liu, Anguo Zhang, Lingling Wang, Linsheng Song
DM9 is a novel protein domain with unknown function originally discovered in Drosophila melanogaster. Recently, a protein harboring DM9 repeats was identified as mannose-specific lectin (CgCGL1, renamed as CgDM9CP-1) from the Pacific oyster Crassostrea gigas. In the present study, another DM9 containing protein was identified from oyster C. gigas (designated as CgDM9CP-2). The open reading frame of CgDM9CP-2 gene was of 432 bp, encoding a polypeptide of 143 amino acids with two tandem DM9 repeats. The deduced amino acid sequence of CgDM9CP-2 shared 60...
March 5, 2018: Developmental and Comparative Immunology
Hua Ye, Shijun Xiao, Xiaoqing Wang, Zhiyong Wang, Zhengshi Zhang, Chengke Zhu, Bingjie Hu, Changhuan Lv, Shuming Zheng, Hui Luo
Schizothorax prenanti (S. prenanti) is an indigenous fish species and is popularly cultured in southwestern China. In recent years, intensive farming of S. prenanti and water quality deterioration has increased the susceptibility of this fish to various pathogens, including Aeromonas hydrophila (A. hydrophila), which has caused severe damage to S. prenanti production. However, the understanding of molecular immune response of S. prenanti to A. hydrophila infection is still lacking. In order to better comprehend the S...
March 8, 2018: Marine Biotechnology
Chamilani Nikapitiya, S H S Dananjaya, B C J De Silva, Gang-Joon Heo, Chulhong Oh, Mahanama De Zoysa, Jehee Lee
Chitosan nanoparticles (CNPs) were synthesized by ionic gelation method and its immunomodulatory properties were investigated in zebrafish larvae. Average particle size and zeta potential were 181.2 nm and +37.2 mv, respectively. Initially, toxicity profile was tested in zebrafish embryo at 96 h post fertilization (hpf) stage using medium molecular weight chitosan (MMW-C) and CNPs. At 5 μg/mL, the hatching rate was almost similar in both treatments, however, the survival rate was lower in MMW-C compared to CNPs exposure, suggesting that toxicity effect of CNPs in hatched larvae was minimal at 5 μg/mL compared to MMW-C...
March 3, 2018: Fish & Shellfish Immunology
Xiaona Zhang, Junkai Lu, Changkao Mu, Ronghua Li, Weiwei Song, Yangfang Ye, Ce Shi, Lei Liu, Chunlin Wang
C-type lectin plays an important role in the innate immune response of crustaceans including Portunus trituberculatus which is an important marine species. In the present study, we cloned the full length of a C-type lectin (designated as PtCTL4) from P. trituberculatus via 3'RACE. The full length of the nucleic acid sequence had a length of 654 bp including an open reading frame (ORF) of 480 bp. PtCTL4 possesses conserved CTL features, while containing a CRD domain with Ca2+ binding site 2 and six conserved cysteine residues...
March 1, 2018: Fish & Shellfish Immunology
Tuan Son Le, Thi Hien Nguyen, Hong Phuong Vo, Van Cuong Doan, Hong Loc Nguyen, Minh Trung Tran, Trong Tuan Tran, Paul C Southgate, D İpek Kurtböke
To determine the effectivity of bacteriophages in controlling the mass mortality of striped catfish ( Pangasianodon hypophthalmus ) due to infections caused by Aeromonas spp. in Vietnamese fish farms, bacteriophages against pathogenic Aeromonas hydrophila were isolated. A. hydrophila -phage 2 and A. hydrophila -phage 5 were successfully isolated from water samples from the Saigon River of Ho Chi Minh City, Vietnam. These phages, belonging to the Myoviridae family, were found to have broad activity spectra, even against the tested multiple-antibiotic-resistant Aeromonas isolates...
February 25, 2018: Antibiotics
Hichem Bargui, Manel Marzouk, Ahmed Benhadj, Moufida Hadj Ali, Youssef Ben Salem, Jalel Boukadida
OBJECTIVE: To present the clinical and bacteriological characteristics of human Aeromonas infections in the central region of Tunisia from January 2011 to September 2015. METHODS: Retrospective study concerning all Aeromonas spp strains isolated at our laboratory during a period of 5 years (2011-2015). Following data were collected: gender, age, hospital department, co-morbidities, site of infection, date, the Aeromonas species and susceptibility phenotype. Identification was based on conventional criteria and antibiotic susceptibility was performed according to the recommendations of "the Committee of the French Society of Microbiology...
April 2017: La Tunisie Médicale
Liangliang Mu, Xiaoxue Yin, Yanhui Xiao, Xia Bian, Yanjian Yang, Liting Wu, Jianmin Ye
Collectins, a subfamily of the C-type lectins, are able to bind non-self glycoconjugates on the surface of microorganisms and inhibit infection by direct neutralization, agglutination and/or opsonization, which play important roles in innate immunity. In this study, a CL11X1-like collectin (OnCL11X1) was identified from Nile tilapia (Oreochromis niloticus) and characterized at expression and agglutination functional levels. The open reading frame of OnCL11X1 is 840 bp of nucleotide sequence encoding polypeptides of 279 amino acids...
February 24, 2018: Developmental and Comparative Immunology
Yu-Hong Shi, Kai Chen, Wen-Jing Ma, Jiong Chen
The short-chain pentraxins (PTXs), including C-reactive protein (CRP) and serum amyloid P (SAP), are soluble pattern recognition molecules (PRMs) that exhibit calcium-dependent binding to bacterial surface molecules. They opsonize pathogens or other particles by phagocytic clearance. However, the detailed functions of short-chain PTXs in teleosts remained unclear. In this study, we identified a short-chain PTX gene from ayu, Plecoglossus altivelis, and tentatively named as PaCRP/SAP. Sequence analysis revealed that PaCRP/SAP has typical characteristics of fish CRP/SAP and is mostly closely related to rainbow smelt (Osmerus mordax) SAP...
February 23, 2018: Fish & Shellfish Immunology
Zahoor Mushtaq, Rahul Krishnan, Kurcheti Pani Prasad, Megha Kadam Bedekar, Annam Pavan Kumar
Galectin-9 is a b-galactoside-binding tandem repeat galectin that regulates many cellular functions, ranging from cell adhesion to pathogen recognition. In spite of extensive study of mammalian galectin importance in immune system, little is known about that of fish. To study the normal expression and immune response of Labeo rohita to pathogens, a tandem-repeat galectin-9 from Labeo rohita was identified and named LrGal-9. Its full-length cDNA was 1534 bp encoded 291 amino acids (35.12 KDa), shared the highest 81% identity with the galectin-9 of Danio rerio...
February 22, 2018: Fish & Shellfish Immunology
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