A fast-growing strain of human hepatitis A virus was selected and characterized. The virus has the unusual property of developing a strong cytopathic effect in tissue culture in 7 to 10 days. Sequences of the viral genome were cloned into recombinant plasmids with the double-stranded replicative form as a template for the reverse transcription of cDNA. Restriction analysis and direct sequencing indicate that this strain is different from that described by Ticehurst et al. (Proc. Natl. Acad. Sci. USA 80:5885-5889, 1983) in the region that presumptively codes for the major capsid protein VP1, but both isolates have conserved large areas of homology in the untranslated 5'-terminal sequences of the genome.
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http://dx.doi.org/10.1128/JVI.56.2.579-588.1985 | DOI Listing |
Animals (Basel)
January 2025
Buginyanya Zonal Agricultural Research and Development Institute, National Agricultural Research Organization (NARO), Mbale P.O. Box 1356, Uganda.
() aquaculture continues to significantly contribute to the growth of the aquaculture sector in Uganda. However, its production is beset by erratic and unreliable seed supply. Also, most hatcheries practice inbreeding of broodstock, resulting in inferior seed characterized by low growth rates.
View Article and Find Full Text PDFFEMS Microbiol Ecol
January 2025
Department of Biotechnology and Food Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.
In this study, we investigated the influence of host genetics and environmental microbiomes on the early gut microbiome of Atlantic salmon. We aimed at rearing the fish in either r- or K-selected environments, where the r-selected environment would be expected to be dominated by fast-growing opportunistic bacteria and thus represent more detrimental microbial environment than the K-selected water. Eggs from both wild and aquaculture strains of Atlantic salmon were hatched under germ-free conditions.
View Article and Find Full Text PDFSci Total Environ
February 2025
Biotechnology Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar. Electronic address:
Polyhydroxyalkanoates (PHAs) are biodegradable and biocompatible polymers that can replace conventional plastics in different sectors. However, PHA commercialization is hampered due to their high production cost resulting from the use of high purity substrates, their low conversion into PHAs by using conventional microbial chassis and the high downstream processing cost. Taking these challenges into account, researchers are focusing on the use of waste by-products as alternative low-cost feedstocks for fast-growing and contamination-resistant halophilic microorganisms (Bacteria, Archaea…).
View Article and Find Full Text PDFBioresour Technol
January 2025
This study investigates the production of polyhydroxybutyrate (PHB) using the thermophilic bacterium Caldimonas thermodepolymerans in fed-batch fermentation. This research highlights the potential of thermophilic bacteria in biopolymer production due to their ability to operate at high temperatures, which reduces contamination risks and enhances energy efficiency. Optimal fermentation conditions were identified at a temperature of 50 °C, with the strain achieving a maximum specific growth rate (μ) of 0.
View Article and Find Full Text PDFComp Biochem Physiol Part D Genomics Proteomics
January 2025
National Engineering Research Laboratory of marine biotechnology and Engineering, Ningbo University, Zhejiang, Ningbo 315211, China; Key Laboratory of Marine Biotechnology of Zhejiang Province, Ningbo University, Zhejiang, Ningbo 315211, China; Key Laboratory of Green Mariculture (Co-construction by Ministry and Province), Ministry of Agriculture and Rural, Ningbo University, Zhejiang, Ningbo 315211, China. Electronic address:
Pampus argenteus, a species distributed throughout the Indo-West Pacific, plays a significant role in the yield of aquaculture species. However, cultured P. argenteus has always been characterised by unbalanced growth synchronisation among individuals, slow growth rate, and lack of excellent germplasm resources.
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