Emended description of Streptococcus ferus isolated from pigs and rats

Baele, Margo; Devriese, Luc; Vancanneyt, Marc; Vaneechoutte, Mario; Snauwaert, Cindy; Swings, Jean; Haesebrouck, Freddy

doi:10.1099/ijs.0.02246-0

Cited by 18 publications

(11 citation statements)

References 14 publications

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“…z Originally described as S. mutans, serotype h. aa According to the results of multilocus enzyme electrophoresis Gilmour et al (1987) included S. ferus in the mitis group. Whatmore and Whiley (2002) found by DNA-DNA hybridization, 16S rRNA sequencing and sodA gene analysis no relation to any of the groups, and Baele et al (2003) determined S. mutans and S. macacae as the closest relatives. ab Facklam (2002) included S. hyovaginalis in the mutans group because of similar phenotypic characteristics.…”

Section: Article In Pressmentioning

confidence: 98%

The present state of species within the genera Streptococcus and Enterococcus

Köhler

2007

International Journal of Medical Microbiology

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Section: Article In Pressmentioning

confidence: 98%

The present state of species within the genera Streptococcus and Enterococcus

Köhler

2007

International Journal of Medical Microbiology

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“…1,22,23 The identity of 28 randomly chosen S. suis isolates was confirmed by sequencing the 16s rRNA gene as described before. 6 S. suis isolates were stored at -80°C until antimicrobial susceptibility testing.…”

Section: Bacterial Isolationmentioning

confidence: 99%

Clinical Resistance and Decreased Susceptibility inStreptococcus suisIsolates from Clinically Healthy Fattening Pigs

Callens

Haesebrouck

Maes

et al. 2013

Microbial Drug Resistance

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Streptococcus suis (S. suis) has often been reported as an important swine pathogen and is considered as a new emerging zoonotic agent. Consequently, it is important to be informed on its susceptibility to antimicrobial agents. In the current study, the Minimum Inhibitory Concentration (MIC) population distribution of nine antimicrobial agents has been determined for nasal S. suis strains, isolated from healthy pigs at the end of the fattening period from 50 closed or semiclosed pig herds. The aim of the study was to report resistance based on both clinical breakpoints (clinical resistance percentage) and epidemiological cutoff values (non-wild-type percentage). Non-wild-type percentages were high for tetracycline (98%), lincomycin (92%), tilmicosin (72%), erythromycin (70%), tylosin (66%), and low for florfenicol (0%) and enrofloxacin (0.3%). Clinical resistance percentages were high for tetracycline (95%), erythromycin (66%), tylosin (66%), and low for florfenicol (0.3%) and enrofloxacin (0.3%). For tiamulin, for which no clinical breakpoint is available, 57% of the isolates did not belong to the wild-type population. Clinical resistance and non-wild-type percentages differed substantially for penicillin. Only 1% of the tested S. suis strains was considered as clinically resistant, whereas 47% of the strains showed acquired resistance when epidemiological cutoff values were used. In conclusion, MIC values for penicillin are gradually increasing, compared to previous reports, although pigs infected with strains showing higher MICs may still respond to treatment with penicillin. The high rate of acquired resistance against tiamulin has not been reported before. Results from this study clearly demonstrate that the use of different interpretive criteria contributes to the extent of differences in reported antimicrobial resistance results. The early detection of small changes in the MIC population distribution of isolates, while clinical failure may not yet be observed, provides the opportunity to implement appropriate risk management steps. Introduction Streptococcus suis (S. suis) is an important swine pathogen affecting pigs of different ages, although susceptibility to the disease decreases with age after weaning. 4,36 It is known to cause meningitis, arthritis, septicemia, endocarditis, polyserositis, bronchopneumonia, and abortion, 4,23,36 but can also be found in the upper respiratory, alimentary, and urogenital tract of healthy pigs.4,22 S. suis has also been implicated in disease in humans, especially among people in close contact with swine and pork. 20,27 Moreover, S. suis has recently been reported as an emerging zoonotic pathogen evidenced by a few large-scale outbreaks of severe S. suis epidemics in Asia. 28,41,42 The most frequently applied treatment for pigs with clinical signs of S. suis infection is feed medication with antimicrobials, particularly, broad-spectrum penicillins. 9,19,37 Currently, no effective commercial vaccine is available. Prevention is based on the optimization of management, au...

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“…(1986) [ 3 ] proposed the creation of the family Aeromonadaceae including Aeromonas as its type and unique genus. In the current edition of Bergey’s Manual of Systematic Bacteriology , three genera ( Aeromonas , Oceanimonas and Tolumonas ) are listed in this family, although two more genera have been described recently, Oceanisphaera [ 4 ] and Zobellella [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Molecular and Chemical Analysis of the Lipopolysaccharide from Aeromonas hydrophila Strain AH-1 (Serotype O11)

et al. 2015

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A group of virulent Aeromonas hydrophila, A. sobria, and A. veronii biovar sobria strains isolated from humans and fish have been described; these strains classified to serotype O11 are serologically related by their lipopolysaccharide (LPS) O-antigen (O-polysaccharide), and the presence of an S-layer consisting of multiple copies of a crystalline surface array protein with a molecular weight of 52 kDa in the form of a crystalline surface array which lies peripheral to the cell wall. A. hydrophila strain AH-1 is one of them. We isolated the LPS from this strain and determined the structure of the O-polysaccharide, which was similar to that previously described for another strain of serotype O11. The genetics of the O11-antigen showed the genes (wbO11 cluster) in two sections separated by genes involved in biosynthesis and assembly of the S-layer. The O11-antigen LPS is an example of an ABC-2-transporter-dependent pathway for O-antigen heteropolysaccharide (disaccharide) assembly. The genes involved in the biosynthesis of the LPS core (waaO11 cluster) were also identified in three different chromosome regions being nearly identical to the ones described for A. hydrophila AH-3 (serotype O34). The genetic data and preliminary chemical analysis indicated that the LPS core for strain AH-1 is identical to the one for strain AH-3.

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Emended description of Streptococcus ferus isolated from pigs and rats

Cited by 18 publications

References 14 publications

The present state of species within the genera Streptococcus and Enterococcus

The present state of species within the genera Streptococcus and Enterococcus

Clinical Resistance and Decreased Susceptibility inStreptococcus suisIsolates from Clinically Healthy Fattening Pigs

Molecular and Chemical Analysis of the Lipopolysaccharide from Aeromonas hydrophila Strain AH-1 (Serotype O11)

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