Project description:C. jejuni HPC5 is a Campylobacter strain isolated from chickens. Following bacteriophage CP34 treatment on chickens colonised by C. jejuni HPC5, a series of CP34 insensitive strains like C. jejuni HPC5 R14 and C. jejuni HPC5 R20 were obtained which compromised their ability to colonise chickens. Reintroduction of C. jejuni HPC5 R14 and R20 in to chickens led to reversion of these strains and the MRPs of the revertant strains fell in to different classes termed C. jejuni HPC5 R14A, R14B, R20A, R20B and R20C and these strained were tested positive for colonisation proficient and bacteriophage sensitive.
Project description:Campylobacter jejuni is a major zoonotic pathogen transmitted to humans via the food chain. C. jejuni is prevalent in chickens, a natural reservoir for this pathogenic organism. Due to the importance of macrolide antibiotics in clinical therapy of human campylobacteriosis, development of macrolide resistance in Campylobacter has become a concern for public health.To facilitate understanding the molecular basis associated with the fitness difference between Erys and Eryr Campylobacter, we compared the transcriptomes between ATCC 700819 and its isogenic Eryr transformant T.L.101 using DNA microarray.
Project description:The gut of chicken is mostly colonised with Campylobacter jejuni and with 100 fold less C. coli. The competitive ability of C. coli OR12 over C. jejuni OR1 has been examined in experimental broiler chickens following the observation that C. coli replaced an established C. jejuni intestinal colonisation within commercial chicken flocks reared outdoors (El-Shibiny, A., Connerton, P.L., Connerton, I.F., 2005. Enumeration and diversity of campylobacters and bacteriophages isolated during the rearing cycles of free-range and organic chickens. Applied Environmental Microbiology. 71, 1259-1266).
2015-09-15 | GSE17805 | GEO
Project description:Genomic epidemiology of Campylobacter spp. isolated from chickens in Brazil
Project description:C. jejuni HPC5 is a Campylobacter strain isolated from chickens. Following bacteriophage CP34 treatment on chickens colonised by C. jejuni HPC5, a series of CP34 insensitive strains like C. jejuni HPC5 R14 and C. jejuni HPC5 R20 were obtained which compromised their ability to colonise chickens. Reintroduction of C. jejuni HPC5 R14 and R20 in to chickens led to reversion of these strains and the MRPs of the revertant strains fell in to different classes termed C. jejuni HPC5 R14A, R14B, R20A, R20B and R20C and these strained were tested positive for colonisation proficient and bacteriophage sensitive. There are three biological replicates for each experiment. Seven independent cDNA preps of C. jejuni HPC5 were prepared and they were labelled independently using AF555. The labelled cDNAs were mixed together and this acted as the control. Each daughter strains were considered as sample and they were labelled with AF645. Hybridisations were done between C. jejuni HPC5 and C. jejuni HPC5 as one of the sample and each of the daughter strains in triplicates. The supplementary files (linked at the foot of this record) contain the summary of the replicate data of the corresponding strain (3 replicates/strain) which have been averaged.
Project description:Cobras (Naja spp.) account for a significant number of snakebite incidents in Thailand. The monocled cobra (Naja kaouthia) has historically been considered the only non-spitting species, but recent evidence indicates population-level diversification in central and southern regions. Additionally, a newly described non-spitting species, the mountain cobra (Naja fuxi), has been identified in mountainous areas. This study investigates venom variation among Thai Naja species and populations and evaluates the efficacy of monovalent and polyvalent Thai antivenoms. Proteomic analyses revealed that three-finger toxins dominate Naja venoms, whereas N. fuxi exhibits a distinct profile enriched in snake venom metalloproteinases and cysteine-rich secretory proteins, suggesting evolutionary divergence. Electrophoretic and enzymatic assays demonstrated species- and population-specific differences in phospholipase A₂, acetylcholinesterase, hyaluronidase, L-amino acid oxidase, phosphodiesterase, and protease activities. Cytotoxicity assays on human fibroblasts and mouse myoblasts showed that N. kaouthia (southern) and N. fuxi venoms caused the most potent and time-dependent cell damage, whereas central N. kaouthia and king cobra (Ophiophagus hannah) venoms were less cytotoxic. Immunoreactivity and neutralisation assays indicated that the species-specific monovalent antivenom effectively binds and neutralises cobra venoms, while neuro-polyvalent antivenom provides moderate cross-protection, and haemato-polyvalent antivenom is highly specific to viperid venom. These findings reveal substantial inter- and intraspecific venom variation in Thai cobras, emphasising the importance of population-level considerations in antivenom design and snakebite management. Continuous evaluation of venom composition and antivenom efficacy is essential to optimise clinical outcomes across Thailand’s diverse landscapes.
2026-04-21 | PXD073641 | Pride
Project description:Antimicrobial Resistance and Genomic Characteristics of Campylobacter spp. from Australian Meat Chickens
Project description:To investigate the transcriptomes in colorectal cancer patients, who were diagnosed and treated at Siriraj Hospital, Thailand, we performed gene expression profiling analysis using data obtained from RNA-seq and Nanostring platforms.
Project description:To investigate the transcriptomes in colorectal cancer patients, who were diagnosed and treated at Siriraj Hospital, Thailand, we performed gene expression profiling analysis using data obtained from RNA-seq and Nanostring platforms.