Assessment of the anti-pathogenic effects of condensed tannin extracts using scanning electron microscopy

Autor:	Mohammed Munis, Dakheel, Amanpreet, Kaur, Afnan A, Al-Mnaser, Irene, Mueller-Harvey, Martin J, Woodward, Caroline, Rymer
Rok vydání:	2020
Předmět:	Plant Extracts Escherichia coli Microscopy Electron Scanning Staphylococcus epidermidis Robinia Proanthocyanidins Tilia Microbial Sensitivity Tests Anti-Bacterial Agents
Zdroj:	Archives of microbiology. 203(4)
ISSN:	1432-072X
Popis:	Two different types of condensed tannins (CTs), which were extracted and purified from tilia (Tilia L.) and black locust (Robinia pseudoacacia), were studied and tested against two kinds of bacteria, including Gram-negative and Gram-positive, avian pathogenic E. coli (APEC) and Staphylococcus epidermidis (S. epidermidis) respectively, by minimal bactericidal concentrations (MBCs) and scanning electron microscopy (SEM). Both CT extracts were significantly effective (p ≤ 0.05) at MBCs of 5-10 mg CT/ml against APEC (Gram-negative), and at 1.25-5 mg CT/ml on S. epidermidis (Gram-positive). This indicated that the CTs were more potent against the Gram-positive than the Gram-negative bacteria. Further, SEM revealed that CTs caused mainly morphological deformations of the bacterial cells and some conjoined cell growth.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=pmid________::6d4d993f983bddb0b6a44632e9d7418f https://pubmed.ncbi.nlm.nih.gov/33399894 Zobrazit plný text záznamu Full text from SpringerLink