After a ban on the use of antibiotics as growth promoters in farm animals in the European Union in 2006, an interest in alternative products with antibacterial or anti-inflammatory properties has increased. In this study, we therefore tested the effects of extracts from Curcuma longa and Scutellaria baicalensis used as feed additives against cecal inflammation induced by heat stress or Salmonella Enteritidis (S. Enteritidis) infection in chickens. Curcuma extract alone was not enough to decrease gut inflammation induced by heat stress. However, a mixture of Curcuma and Scutellaria extracts used as feed additives decreased gut inflammation induced by heat or S. Enteritidis, decreased S. Enteritidis counts in the cecum but was of no negative effect on BW or humoral immune response. Using next-generation sequencing of 16S rRNA we found out that supplementation of feed with the 2 plant extracts had no effect on microbiota diversity. However, if the plant extract supplementation was provided to the chickens infected with S. Enteritidis, Faecalibacterium, and Lactobacillus, both bacterial genera with known positive effects on gut health were positively selected. The supplementation of chicken feed with extracts from Curcuma and Scutelleria thus may be used in poultry production to effectively decrease gut inflammation and increase chicken performance.

• Klíčová slova
• Curcuma, Salmonella, Scutellaria, chicken, feed, flavonoid, inflammation,
• MeSH
• antibakteriální látky aplikace a dávkování   farmakologie   MeSH
• antiflogistika aplikace a dávkování   farmakologie   MeSH
• Curcuma chemie   MeSH
• dieta veterinární   MeSH
• krmivo pro zvířata analýza   MeSH
• kur domácí * MeSH
• mikrobiota účinky léků   MeSH
• nemoci drůbeže farmakoterapie   imunologie   mikrobiologie   MeSH
• potravní doplňky analýza   MeSH
• RNA ribozomální 16S genetika   metabolismus   MeSH
• rostlinné extrakty aplikace a dávkování   farmakologie   MeSH
• Salmonella enteritidis účinky léků   fyziologie   MeSH
• salmonelová infekce u zvířat farmakoterapie   mikrobiologie   MeSH
• šišák chemie   MeSH
• zánět farmakoterapie   veterinární   MeSH
• zvířata MeSH
• Check Tag
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• antibakteriální látky MeSH
• antiflogistika MeSH
• RNA ribozomální 16S MeSH
• rostlinné extrakty MeSH

OBJECTIVES: In this study we examined the in vitro synergistic effect of baicalin, the flavone constituent of Scutellaria spp., in combinations with oxytetracycline and tetracycline on the growth of Staphylococcus aureus. METHODS: The MICs were determined by the broth microdilution method and the effect of combinations was evaluated according to the sum of fractional inhibitory concentration indices (FICIs). RESULTS: Synergistic activity (FICI ≤ 0.5) was observed for combinations of baicalin with oxytetracycline or tetracycline against 4 of 10 strains tested, whereas the baicalin/oxytetracycline combination possessed the strongest synergistic effect (FICI = 0.418). CONCLUSIONS: Baicalin acts synergistically with oxytetracycline and tetracycline, enhancing its antimicrobial activity against S. aureus, including methicillin- and tetracycline-resistant strains.

• MeSH
• antibakteriální látky farmakologie   MeSH
• flavonoidy izolace a purifikace   farmakologie   MeSH
• lidé MeSH
• mikrobiální testy citlivosti MeSH
• oxytetracyklin farmakologie   MeSH
• šišák chemie   MeSH
• Staphylococcus aureus účinky léků   MeSH
• synergismus léků * MeSH
• tetracyklin farmakologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• práce podpořená grantem MeSH
• Názvy látek
• antibakteriální látky MeSH
• baicalin MeSH Prohlížeč
• flavonoidy MeSH
• oxytetracyklin MeSH
• tetracyklin MeSH