Capsular Polysaccharide Production in Bacteria of the Mycoplasma Genus: A Huge Diversity of Pathways and Synthases for So-Called Minimal Bacteria.

Mycoplasmas are wall-less bacteria with many species spread across various animal hosts in which they can be pathogenic. Despite their reduced anabolic capacity, some mycoplasmas are known to secrete hetero- and homopolysaccharides, which play a role in host colonization through biofilm formation or immune evasion, for instance. This study explores how widespread the phenomenon of capsular homopolysaccharide secretion is within mycoplasmas, and investigates the diversity of both the molecules produced and the synthase-type glycosyltransferases responsible for their production.

Genomic polymorphism of Mycoplasma flocculare revealed by a newly developed multilocus sequence typing scheme.

Mycoplasma flocculare is genetically closely related to M. hyopneumoniae, the etiologic agent of porcine enzootic pneumonia, and is frequently isolated with this second species. In this article, we report on the development of the first multilocus sequence typing (MLST) scheme for M.

Pathogenicity study of Mycoplasma hyorhinis and M. flocculare in specific-pathogen-free pigs pre-infected with M. hyopneumoniae.

Mycoplasma (M.) hyopneumoniae is the initiator agent of the porcine respiratory disease complex (PRDC) and the etiological agent of enzootic pneumonia. M.

Novel Streptococcus suis Sequence Type 834 among Humans, Madagascar.

Two cases of meningitis caused by Streptococcus suis occurred in Madagascar, 1 in 2015 and 1 in 2016. We report the characterization of the novel sequence type, 834, which carried the mrp+/sly+/epf+ virulence marker and a mutation G→T at position 174, leading to a substitution mutS1 to mutS284.

Multilocus sequence typing of Mycoplasma hyorhinis strains identified by a real-time TaqMan PCR assay.

A real-time TaqMan PCR assay based on the gene encoding the protein p37 was developed to detect Mycoplasma hyorhinis. Its specificity was validated with 29 epidemiologically unrelated M. hyorhinis strains (28 field strains and one reference strain) and other mycoplasma species or with other microorganisms commonly found in pigs.