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    Whole genome sequencing and comparative genomic analysis of Chlamydia gallinacea field strains isolated from poultry in Poland

    Pathogens

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    pathogens-12-00891-v2.pdf (2.169MB)
    Data
    2023
    Autor
    Zaręba-Marchewka, Kinga
    Bomba, Arkadiusz
    Scharf, Sabine
    Niemczuk, Krzysztof
    Schnee, Christiane
    Szymańska-Czerwińska, Monika
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    Streszczenie
    Chlamydia gallinacea is an intracellular bacterium belonging to the Chlamydiaceae family. Poultry is considered to be the major reservoir of this agent, which has worldwide distribution and a particularly consistent worldwide occurrence in chicken flocks. The bacterium has been linked to respiratory disease in humans but without definitive confirmation; nevertheless, while it has not been proved to be the cause of human respiratory disease, a recent report from Italy verified its bird-to-human transmission. This aspect being significant for public health, more research is needed to gain insight into the infection biology of C. gallinacea. In this study, the genomes of eleven novel C. gallinacea field strains from different regions of Poland were analyzed comparatively. It was confirmed that C. gallinacea strains are closely related, with at least 99.46% sequence identity. They possess a conservative genome structure involving the plasticity zone with a complete cytotoxin, the type three secretion system, inclusion membrane proteins, polymorphic membrane proteins, hctA and hctB histone-like proteins, and the chlamydial protease-like activating factor exoenzyme, as well as plasmids. Genetic diversity seems to be restricted. However, some genetic loci, such as ompA and multi-locus sequence typing target genes, are diverse enough to enable high-resolution genotyping and epidemiological tracing.
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    https://www.mdpi.com/2076-0817/12/7/891
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