Project description:Pathogens that cause respiratory diseases in poultry are very complicated, and co-infections with multiple pathogens are prevalent. The H9N2 strain of avian influenza virus (AIV) and Escherichia coli (E. coli) are common poultry pathogens that limit the development of the poultry industry. This study aimed to clarify the interaction between these two pathogens and their pathogenic mechanism using a mouse model. Co-infection with H9N2 AIV and E. coli significantly increased the mortality rate of mice compared to single viral or bacterial infections. It also led to the development of more severe lung lesions compared to single viral or bacterial infections. Co-infection further causes a storm of cytokines, which aggravates the host’s disease by regulating the STAT/SOCS and ERK1/2 pathways. Moreover, co-infection mutually benefited the virus and the bacteria by increasing their multiplication rates. Importantly, nitric oxide synthase 2 (NOS2) expression was also significantly enhanced by the co-infection. It played a key role in the rapid proliferation of E. coli in the presence of the coinfecting H9N2 virus. Therefore, our study underscores the role of NOS2 as a determinant for bacteria growth and illustrates its importance as an additional mechanism that enhances influenza virus-bacteria synergy. It further provides a scientific basis for investigating the synergistic infection mechanism between viruses and bacteria.
2021-04-08 | GSE164963 | GEO
Project description:Metagenomic detection of viral pathogens in Spanish honeybees
Project description:Salmonella being one of the major infectious diseases in poultry causes considerable economical losses in terms of mortality and morbidity especially in countries which lack effective vaccination programs. Salmonellosis is considered to be most important zoonotic disease which causes considerable foodborne illness that leads to enormous economic loses. To minimize such losses, enhancing disease resistance to different pathogens seems to be a promising strategy. The indigenous chicken, evolved through thousands of years of natural selection, are well adapted to the local climatic conditions with better resistance to diseases. In the present study we investigated liver and spleen transcriptome profile of indigenous (Kashmir faverolla) breed and commercial broiler poultry at day 5 post-inoculation with Salmonella typhimurium using RNA sequencing. The DEGs and pathways identified shall provide potential targets to enhance disease resistance in poultry through successful breeding programmes.
Project description:Salmonella enterica Pullorum(S. Pullorum) is one of the most important pathogens in poultry. A better understanding of the immune response and molecular modulation resulting from infection by S. Pullorum will facilitates the control of this pathogen. In this study, we determined the relationships among identified differential expressed genes (DEGs) and pathways via deeply mining microarray data from Guangxi Huang Chicken challenged with S. Pullorum.