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Relatedness of Gardnerella prophages and their endolysins

bioRxiv [Preprint]. 2026 Sep 29:2026.09.28.754664. doi: 10.64898/2026.09.28.754664. ABSTRACT The Gardnerella genus includes a complex sub-taxonomy of bacterial species and subgroups which have been implicated in bacterial vaginosis. We analyzed G. leopoldii, G. swidsinski, G. piotii , and G. vaginalis genomes available in public databases and predicted proviral sequences using Cenote-Taker3. We clustered 266 prophage sequences … Read more

ICTV Virus Taxonomy Profile: Bacilladnaviridae 2026

J Gen Virol. 2026 Sep;107(9). doi: 10.1099/jgv.0.002321. ABSTRACT Bacilladnaviridae is a family of viruses with single-stranded, circular DNA genomes that range from 3.4 to 6 kb and contain a short double-stranded region of 0.5-1 kb. The genome is replicated by the rolling-circle mechanism. Bacilladnavirids encode a jelly-roll capsid protein which forms non-enveloped icosahedral capsids with … Read more

New Parvovirus and Other Swab-Associated Viruses Identified in the Eurasian Goshawk (Astur gentilis)

Pathogens. 2026 Sep 5;15(9):942. doi: 10.3390/pathogens15090942. ABSTRACT Cloacal swabs were collected from 12 Eurasian goshawk chicks during routine veterinary inspections to evaluate the gut-associated virome of goshawks used for falconry. The material was used for metagenomic screening with high-throughput sequencing. Sequences belonging to several viral families (Poxviridae, Circoviridae, Anelloviridae, Retroviridae, Parvoviridae and Astroviridae) were detected … Read more

Identification of aviadenovirus and dependoparvovirus in an Adélie penguin fecal sample from Cape Royds (Ross Island, Antarctica)

Arch Virol. 2026 Sep 4;171(10):268. doi: 10.1007/s00705-026-06726-x. ABSTRACT Adenoviruses (Adenoviridae) and their associated replication-deficient dependoparvoviruses (Parvoviridae) are recognized as significant components of the avian virome. While well-studied in domestic birds, these viruses remain underexplored in wild Antarctic birds. Information is limited on viruses circulating in penguins, particularly outside of the Antarctic Peninsula Region. Here we … Read more

Genomes of cressdnaviricots and phixviricots in a freshwater lake sample from Arizona, USA

Microbiol Resour Announc. 2026 Aug 28:e0092026. doi: 10.1128/mra.00920-26. Online ahead of print. ABSTRACT A viral metagenomic analysis of a 40 ml water sample from a small freshwater lake near Flagstaff, Arizona, USA, resulted in the identification of 295 circular viral genome sequences. Of these, 126 are members of Cressdnaviricota and 169 of Phixviricota phyla. PMID:42663468 … Read more

Effects of Nutrient Limitation on Antarctic Microbial Community Diversity, Composition, and Interactions: A Cryoconite Microcosm Study

Microorganisms. 2026 Aug 16;14(8):1807. doi: 10.3390/microorganisms14081807. ABSTRACT Dry, harsh, nutrient-limited environments such as the McMurdo Dry Valleys, Antarctica, may be particularly susceptible to changes in nutrient availability, demonstrating strong deterministic community assembly processes shaping communities within an ecosystem largely dominated by stochastic processes. Utilizing previously characterized cryoconite hole sediments from Canada Glacier in Taylor Valley, … Read more

Atypical myxomatosis in European rabbits is caused by the recombinant myxoma virus involved in species jumping into hares

bioRxiv [Preprint]. 2026 Jul 27:2026.07.25.740729. doi: 10.64898/2026.07.25.740729. ABSTRACT Myxoma virus (MYXV), a member of the Leporipoxvirus genus (species Leporipoxvirus myxoma; family Poxviridae ), causes a highly lethal disease known as myxomatosis in European rabbits. In late 2018, a new natural MYXV isolate, MYXV-Tol (a.k.a. hare MYXV; ha-MYXV), emerged and caused myxomatosis-like disease with high mortality … Read more

Virus community views on the possible extension of virus taxonomic assignments to a below-species rank

J Gen Virol. 2026 Aug;107(8). doi: 10.1099/jgv.0.002313. ABSTRACT The International Committee on Taxonomy of Viruses (ICTV) is considering a proposal submitted in July 2025 to create an optional additional taxonomic rank below the level of species. This was designed to increase the precision of taxonomic assignment where clinical or other regulatory distinctions need to be … Read more

Skuas as sentinels of high pathogenicity avian influenza H5N1 on the Antarctic Peninsula in the 2024/2025 austral summer

Microb Genom. 2026 Aug;12(8). doi: 10.1099/mgen.0.001724. ABSTRACT Despite Antarctica’s geographic isolation, the first incursion of high pathogenicity avian influenza (HPAI) H5N1 was detected in the 2023/2024 austral summer. Surveillance for HPAI H5N1 in Antarctica remains patchy due to logistical, financial and infrastructure challenges, with many suspected cases remaining unconfirmed and few viral genome sequences available … Read more

Efunaviria, Floreoviria, Pleomoviria, and Volvereviria: four realms of viruses with small DNA genomes to replace realm Monodnaviria

J Virol. 2026 Aug 12:e0101926. doi: 10.1128/jvi.01019-26. Online ahead of print. ABSTRACT Realm Monodnaviria was established for unification of viruses with small DNA genomes that encode homologous endonucleases initiating rolling circle replication or their inactivated derivatives. However, comprehensive analysis of the expanded virus sequence and structure databases revealed that neither replication nor structural modules within … Read more