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A rapid and simple procedure was established to obtain clonal axenic cultures of Tetratrichomonas gallinarum and Trichomonas gallinae and to optimize their in vitro growth conditions. Medium 199 was used for axenization of two genetically different clones of T. gallinarum and T. gallinae. Six different media were used to optimize the growth behaviour of axenically grown parasites: Medium 199, TYM, TYI-S-33, Hollander fluid (HF), Trichomonas vaginalis (TV) and modified TV media. The highest cell yields for both axenic clones of T. gallinarum were obtained in modified TV medium without antibiotics. The maximum numbers of trophozoites of T. gallinae were obtained in an optimized HF medium. This study demonstrated that axenic cultures for T. gallinarum and T. gallinae could be obtained avoiding the migration technique through a V-tube. Following axenization and optimization, both clones of T. gallinarum and T. gallinae could be propagated both aerobically and anaerobically.
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http://dx.doi.org/10.1016/j.exppara.2009.09.014 | DOI Listing |
Vaccines (Basel)
July 2025
College of Veterinary Medicine, Jeonbuk National University, Specialized Campus, Iksan 54596, Republic of Korea.
Fowl typhoid (FT), a septicemic infection caused by Gallinarum (SG), and H9N2 avian influenza are two economically important diseases that significantly affect the global poultry industry. We exploited the live attenuated Gallinarum (SG) mutant JOL3062 (SG: ∆ ∆ ∆) as a delivery system for H9N2 antigens to induce an immunoprotective response against both H9N2 and FT. To enhance immune protection against H9N2, a prokaryotic and eukaryotic dual expression plasmid, pJHL270, was employed.
View Article and Find Full Text PDFPoult Sci
July 2024
College of Veterinary Medicine, Jeonbuk National University, Iksan 54596, Republic of Korea. Electronic address:
An effective vaccine strategy is indispensable against infectious bronchitis virus (IBV) and fowl typhoid (FT), both of which threaten the poultry industry. This study demonstrates a vector system, pJHL270, designed to express antigens in prokaryotic and eukaryotic cells. The vector system stimulates immune responses via synchronized antigen presentation to MHC class-I and -II molecules to produce balanced Th1/Th2 responses.
View Article and Find Full Text PDFDev Comp Immunol
December 2023
College of Veterinary Medicine, Jeonbuk National University, Iksan Campus, 54596, Republic of Korea. Electronic address:
The H9N2 avian influenza virus significantly affects the health of poultry and humans. We identified a prokaryotic and eukaryotic dual-expression vector system, pJHL270, that can provide simultaneous MHC class I and II stimulation of the host immune system, and we designed vaccine antigens by selecting the consensus HA1 sequence and M2e antigens from H9N2 virus circulating in South Korea from 2000 to 2021. The genes were cloned into the pJHL270 vector, and the cloned plasmid was delivered by a live-attenuated Salmonella Gallinarum (SG) strain.
View Article and Find Full Text PDFInt J Mol Sci
July 2023
School of Pharmaceutical Sciences, Nanjing Tech University, 30 Puzhunan Road, Nanjing 211816, China.
2'-fucosyllactose (2'FL) is an important nutrient in human milk that stimulates beneficial microbiota and prevents infection. α-L-fucosidase is a promising component for 2'FL synthesis. In this study, a soil-oriented α-L-fucosidase-producing strain from ZS1 was isolated.
View Article and Find Full Text PDFGut Microbes
August 2022
Department of Veterinary Medicine, Institute of Microbiology and Epizootics, Centre for Infection Medicine, Free University of Berlin, Berlin, Germany.
The probiotic bacterial strain SF68 has been shown to alleviate symptoms of intestinal inflammation in human clinical trials and animal feed supplementation studies. To identify factors involved in immunomodulatory effects on host cells, SF68 and other commensal and clinical isolates were screened using intestinal epithelial cell lines harboring reporter fusions for NF-κB and JNK(AP-1) activation to determine the responses of host cell innate immune signaling pathways when challenged with bacterial protein and cell components. Cell-free, whole-cell lysates of SF68 showed a reversible, inhibitory effect on both NF-κB and JNK(AP-1) signaling pathway activation in intestinal epithelial cells and abrogated the response to bacterial and other Toll-like receptor (TLR) ligands.
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