Prevotella intermediaandPrevotella nigrescensserotypes, ribotypes and binding characteristics

Prevotella intermedia and Prevotella nigrescens serotypes, ribotypes and binding characteristics.

Type strains and 62 clinical isolates of Prevotella intermedia and Prevotella nigrescens were typed with the use of genomic DNA fingerprints and rRNA gene probes. The strains were further serotyped with monoclonal antibodies and characterized with SDS-PAGE, enzymatic activities, hemolysis and hemagglutination and coaggregation with Streptococcus and Actinomyces spp. P. intermedia and P. nigresc...

Hemoglobin binding activity and hemoglobin-binding protein of Prevotella nigrescens

Prevotella nigrescens, lacking siderophores was found to bind to the hemoproteins. The binding was observed also in the envelope which was prepared by sonication of the cell. The binding occurred in the pH-dependent manner; the binding was observed below neutral pHs of the incubation mixtures but only slightly observed in the neutral and alkaline pHs. Furthermore, hemoglobin bound to the envelo...

Binding and utilization of human transferrin by Prevotella nigrescens.

To survive and multiply within their hosts, pathogens must possess efficient iron-scavenging mechanisms. In the present study, we investigate the capacity of Prevotella nigrescens and Prevotella intermedia to use various sources of iron for growth and characterize the transferrin-binding activity of P. nigrescens. Iron-saturated human transferrin and lactoferrin, but not ferric chloride and the...

Ribotypes Matter, Significance of Clostridium difficile Ribotypes in Cancer Patients with Diarrhea

effect of bataine and sulphate supplement on wool and milk characteristics and lambs performance in naine ewes

تعداد 20 رأس میش نژاد نائینی 6+-24 ماهه، با میانگین وزن 2/3-+40 کیلوگرم، همراه با 20 رأس بره های آنها در قالب طرح کاملا تصادفی اثر بتائین و مکمل سولفات بر خصوصیات شیر و پشم و عملکرد بره ها بررسی شد. میش ها بطور تصادفی در چهار تیمار قرار گرفتند. تیمارها عبارت بودند از: 1-گروه شاهد 2-بتائین (05/0 درصد ماده خشک) 3-سولفات (24/0 سولفور درصد ماده خشک 4-بتائین هرماه با سولفات. جیره غذائی طبق nrc با مح...