biostudies-literatureUnknown24(3)Tarlachkov SVBacteria of the genus "<i>Candidatus</i> Cardinium" and related organisms composing the <i>Cardinium</i> clade are intracellular endosymbionts frequently occurring in several arthropod groups, freshwater mussels and plant-parasitic nematodes. Phylogenetic analyses based on two gene sequences (16S rRNA and <i>gyrB</i>) showed that the <i>Cardinium</i> clade comprised at least five groups: A, B, C, D and E. In this study, a screening of 142 samples of plant-parasitic nematodes belonging to 93 species from 12 families and two orders using PCR with specific primers and sequencing, revealed bacteria of <i>Cardinium</i> clade in 14 nematode samples belonging to 12 species of cyst nematodes of the family Heteroderidae. Furthermore, in this study, the genome of the <i>Cardinium</i> cHhum from the International journal of molecular sciences2905https://www.ebi.ac.uk/biostudies/studies/S-EPMC9918034biostudies-literatureDistribution of Bacterial Endosymbionts of the <i>Cardinium</i> Clade in Plant-Parasitic Nematodes.PMC9918034Tarlachkov SVCastillo PEvtushenko LIEfeykin BDSubbotin SAfalseDistribution of Bacterial Endosymbionts of the <i>Cardinium</i> Clade in Plant-Parasitic Nematodes.Bacteria of the genus "<i>Candidatus</i> Cardinium" and related organisms composing the <i>Cardinium</i> clade are intracellular endosymbionts frequently occurring in several arthropod groups, freshwater mussels and plant-parasitic nematodes. Phylogenetic analyses based on two gene sequences (16S rRNA and <i>gyrB</i>) showed that the <i>Cardinium</i> clade comprised at least five groups: A, B, C, D and E. In this study, a screening of 142 samples of plant-parasitic nematodes belonging to 93 species from 12 families and two orders using PCR with specific primers and sequencing, revealed bacteria of <i>Cardinium</i> clade in 14 nematode samples belonging to 12 species of cyst nematodes of the family Heteroderidae. Furthermore, in this study, the genome of the <i>Cardinium</i> cHhum from the 2023-01-01T00:00:00Z2023 Feb2026-04-08T14:14:40.242Z2025-02-19T02:23:42.907ZS-EPMC99180343676923110.3390/ijms24032905