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Virulence properties of Staphylococcus delphini strains isolated from domestic pigeons

100%

Sudagidan M., Aydin A.

Medycyna Weterynaryjna

2012

tom 68

nr 04

Virulence properties (biofilm formation, antibiotic susceptibility, inducible clindamycin resistance, extracellular protease-lipase productions and presence of virulence genes) and genetic-relatedness of 18 Staphylococcus delphini strains (8 group A and 10 group B), isolated from domestic pigeons, were investigated. All strains were susceptible to vancomycin, oxacillin, cefoxitin, novobiocin, sulphamethoxazole/trimethoprim, gentamicin, teicoplanin, amoxycillin/clavulanic acid, rifampicin, cephazolin, linezolid, imipenem, chloramphenicol and tobramycin. However, 15, 13, 12 and 6 strains were found to be resistant to erythromycin, tetracycline, clindamycin and penicillin G, respectively. Although 12 strains showed constitutive resistance, inducible clindamycin resistance was detected in 3 strains by D-test. In addition, ermABC genes related to inducible or constitutive resistance were detected in 9 strains (ermA), in 5 strains (ermC) and in one strain (ermB). Biofilm formation results demonstrated that 9/18 strains showed high adherence to microplate surfaces in tryptic soy broth (TSB) supplemented with 1% sucrose. None of the strains harbored virulence genes, including enterotoxins, toxic-shock syndrome toxin, exfoliative toxins, heamolysins, methicillin-resistance, set1, lukE-lukD leukocidin and Panton-Valentine Leukocidine (PVL). Pulsed-field gel electrophoresis (PFGE) analysis revealed that there were two main clusters with 75% homology and only 3 strains showed 100% homology. In addition, 5 strains have strong proteolytic activity and 8 strains showed lipase activity. To our knowledge, this is the first study to investigate the virulence properties and genetic-relatedness of S. delphini strains isolated from pigeons in Turkey.

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Levels of hormones and cytokines associated with growth in Honamlı and native hair goats

80%

Devrim A. K., Elmaz O., Mamak N., Sudagidan M.

Polish Journal of Veterinary Sciences

2015

tom 18

nr 2

This study was designed to assess alterations of hormone and cytokine levels associated with growth period during puberty in Honamli goats which were identified as a new goat breed and had one of the highest meat production potential among the other goat breeds in Turkey. Honamli goats are originated from native hair goats, so parallel studies of sampling and analyzing were conducted also in native hair goats which have moderate meat production. Blood serum samples of Honamli (n=90) and native hair goats (n=90) were obtained from the pure herds in Korkuteli and Ka districts of Anatolia. Concentrations of growth hormone (GH), myostatin (MSTN), insulin-like growth factor (IGF), growth hormone releasing hormone (GHRH), growth hormone releasing peptide (GHRP), leptin, transforming growth factor-betal (TGF-ß1) and vascular endothelial cell growth factor (VEGF) levels were measured by ELISA in each breed in the age groups of 4, 8 and 12 months. The present results indicate interesting correlations among the age groups and all the examined hormone and cytokine parameters exhibited significant (P<0.05 and P<0.001) differences. The parameters investigated were usually begun to increase after 4 months of age in the both breeds and sexes. Therefore, this paper supported the view that the beginning of hormonal alterations of goats could occur at 4th month of age. The results reported here emphasize the primary role played by GH, MSTN, IGF-1, leptin, GHRH, GHRP, TGF-ßi and VEGF in the first year growth period of goats.

Ograniczanie wyników

1 Medycyna Weterynaryjna

1 Polish Journal of Veterinary Sciences

2 Sudagidan M.

1 Aydin A.

1 Devrim A. K.

1 Elmaz O.

1 Mamak N.

1 2015

1 2012

Wyniki wyszukiwania

Virulence properties of Staphylococcus delphini strains isolated from domestic pigeons

Levels of hormones and cytokines associated with growth in Honamlı and native hair goats