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During a study to assess the faecal microbiome of common seals (Phoca vitulina) in a Dutch seal rehabilitation centre, 16S rRNA gene sequences of an unknown Campylobacter taxon were identified. Campylobacter isolates, which differed from the established Campylobacter taxa, were cultured and their taxonomic position was determined by a polyphasic study based on ten isolates. The isolates were characterized by 16S rRNA and atpA gene sequence analyses and by conventional phenotypic testing. Based on the whole genome sequences, the average nucleotide identity and core genome phylogeny were determined. The isolates formed a separate phylogenetic clade, divergent from all other Campylobacter taxa and most closely related to Campylobacter corcagiensis, Campylobacter geochelonis and Campylobacter ureolyticus. The isolates can be distinguished phenotypically from all other Campylobacter taxa based on their lack of motility, growth at 25 °C and growth on MacConkey agar. This study shows that these isolates represent a novel species within the genus Campylobacter, for which the name Campylobacter blaseri sp. nov. is proposed. The type strain for this novel species is 17S00004-5 (=LMG 30333=CCUG 71276).
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http://dx.doi.org/10.1099/ijsem.0.002742 | DOI Listing |
BMC Microbiol
August 2025
Faculty of Resource Science and Technology, Universiti Malaysia Sarawak, Sarawak, Kota Samarahan, 94300, Malaysia.
Rodents are known to act as reservoirs for zoonotic diseases due to their widespread distribution and synanthropic nature. Among these, foodborne pathogens capable of causing gastroenteritis in humans are of particular concern, as rodents can facilitate their transmission through contamination of food sources. Forest-dwelling rodents may harbour bacterial taxa native to their habitat, posing a risk of zoonotic spillover to nearby human settlements.
View Article and Find Full Text PDFAm J Clin Nutr
August 2025
BCNatal (Hospital Clínic and Hospital Sant Joan de Déu), University of Barcelona, Barcelona, Spain; Institut de Recerca Sant Joan de Déu (IRSJD), Barcelona, Spain; Primary care interventions to prevent maternal and child chronic diseases of perinatal and developmental origin RD21/0012/0003, Insti
Background: Despite the importance of gestation period for human health, studies addressing the impact of maternal microbiota on its progression and its modulation by maternal lifestyle are scarce. Although most of the evidence in the field comes from observational studies, we recently described how some lifestyle interventions during pregnancy reduced the small-for-gestational-age (SGA) incidence. We hypothesized the pregnant individual's microbiome modulation as potential mechanism by which lifestyle interventions could impact gestation progression.
View Article and Find Full Text PDFMicrobiome
August 2025
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA-CSIC), Ctra. de La Coruña, Km 7.5, 28040, Madrid, Spain.
Background: Despite advancements in artificial insemination, sheep fertility rates remain suboptimal. Recent studies in other species highlight the critical role of reproductive microbiota in influencing fertility outcomes. This research explores the relationship between ovine vaginal microbiota, associated functional pathways, and fertility using advanced nanopore long-reading metagenomic sequencing on 297 ewes from three Spanish breeds across four herds.
View Article and Find Full Text PDFJ Gen Virol
July 2025
Department of Phage Therapy, Bacteriophage Laboratory, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wrocław, Poland.
This article summarises the activities of the International Committee on Taxonomy of Viruses Bacterial Viruses Subcommittee, detailing developments in the classification of bacterial viruses. We provide here an overview of all new, abolished, moved and renamed taxa proposed in 2024, approved by the Executive Committee, and ratified by membership vote in 2025. Through the collective efforts of 74 international contributors of taxonomy proposals in this round, 43 ratified proposals have led to the creation of one new phylum, one class, four orders, 33 families, 14 subfamilies, 194 genera and 995 species.
View Article and Find Full Text PDFJ Acad Nutr Diet
July 2025
Social and Behavioral Sciences Branch, Division of Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland.
Background: Oligosaccharides in breast milk facilitate colonization of the infant gut microbiota that reduce the risk of metabolic disorders. Although diet influences human milk composition, no study to date has examined the association of breastfeeding parents' dietary intake, exclusively during the postpartum period, with infant gastrointestinal microbiome.
Objective: To examine the relationship of postpartum diet quality of the breastfeeding parent, as measured by Healthy Eating Index 2015 (HEI-2015), with gut microbiota of infants at age 6 months.