Antimicrobial activity of chitosan and a chitosan oligomer against bacterial pathogens of warmwater fish

2017 ◽  
Vol 122 (6) ◽  
pp. 1570-1578 ◽  
Author(s):  
M. Yildirim-Aksoy ◽  
B.H. Beck
Keyword(s):  
Antimicrobial Activity ◽  
Bacterial Pathogens ◽  
Chitosan Oligomer ◽  
Warmwater Fish

The Study of Bacillus Subtils Antimicrobial Activity on Some of the Pathological Isolates

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Hussein A Kadhum ◽  
Thualfakar H Hasan2
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Bacterial Growth ◽  
Broad Spectrum ◽  
Inhibitory Activity ◽  
Bacterial Pathogens ◽  
Inhibitory Ability ◽  
Selection Of

The study involved the selection of two isolates from Bacillus subtilis to investigate their inhibitory activity against some bacterial pathogens. B sub-bacteria were found to have a broad spectrum against test bacteria such as Staphylococcus aureus and Pseudomonas aeruginosa. They were about 23-30 mm and less against Klebsiella sp. The sensitivity of some antibodies was tested on the test samples. The results showed that the inhibitory ability of bacterial growth in the test samples using B. subtilis extract was more effective than the antibiotics used.

scholarly journals Antimicrobial activity of Asteraceae species against bacterial pathogens isolated from postmenopausal women

PLoS ONE ◽  
2020 ◽  
Vol 15 (1) ◽  
pp. e0227023 ◽  
Author(s):  
Marcela Oliveira Chiavari-Frederico ◽  
Lidiane Nunes Barbosa ◽  
Isabela Carvalho dos Santos ◽  
Gustavo Ratti da Silva ◽  
Alanna Fernandes de Castro ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Postmenopausal Women ◽  
Bacterial Pathogens

scholarly journals Intestinal Epithelium-Specific MyD88 Signaling Impacts Host Susceptibility to Infectious Colitis by Promoting Protective Goblet Cell and Antimicrobial Responses

2014 ◽  
Vol 82 (9) ◽  
pp. 3753-3763 ◽  
Author(s):  
Ganive Bhinder ◽  
Martin Stahl ◽  
Ho Pan Sham ◽  
Shauna M. Crowley ◽  
Vijay Morampudi ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Goblet Cell ◽  
Tissue Damage ◽  
Bacterial Pathogens ◽  
Adaptor Protein ◽  
Host Susceptibility ◽  
Infectious Colitis ◽  
Content Type ◽  
Cell Responses ◽  
Myd88 Signaling

ABSTRACTIntestinal epithelial cells (IECs), including secretory goblet cells, form essential physiochemical barriers that separate luminal bacteria from underlying immune cells in the intestinal mucosa. IECs are common targets for enteric bacterial pathogens, with hosts responding to these microbes through innate toll-like receptors that predominantly signal through the MyD88 adaptor protein. In fact, MyD88 signaling confers protection against several enteric bacterial pathogens, includingSalmonella entericaserovar Typhimurium andCitrobacter rodentium. Since IECs are considered innately hyporesponsive, it is unclear whether MyD88 signaling within IECs contributes to this protection. We infected mice lacking MyD88 solely in their IECs (IEC-Myd88−/−) withS.Typhimurium. Compared to wild-type (WT) mice, infectedIEC-Myd88−/−mice suffered accelerated tissue damage, exaggerated barrier disruption, and impaired goblet cell responses (Muc2 and RELMβ). Immunostaining revealedS.Typhimurium penetrated the IECs ofIEC-Myd88−/−mice, unlike in WT mice, where they were sequestered to the lumen. When isolated crypts were assayed for their antimicrobial actions, crypts fromIEC-Myd88−/−mice were severely impaired in their antimicrobial activity againstS.Typhimurium. We also examined whether MyD88 signaling in IECs impacted host defense againstC. rodentium, withIEC-Myd88−/−mice again suffering exaggerated tissue damage, impaired goblet cell responses, and reduced antimicrobial activity againstC. rodentium. These results demonstrate that MyD88 signaling within IECs plays an important protective role at early stages of infection, influencing host susceptibility to infection by controlling the ability of the pathogen to reach and survive at the intestinal mucosal surface.

Antimicrobial Activity of Ficus Leaf Extracts on Some Fungal and Bacterial Pathogens of Dioscorea rotundata from Southwest Nigeria

2011 ◽  
Vol 11 (5) ◽  
pp. 359-366 ◽  
Author(s):  
O.A. Oyelana ◽  
E.U. Durugbo ◽  
O.D. Olukanni ◽  
E.A. Ayodele ◽  
Z.O. Aikulola ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Bacterial Pathogens ◽  
Leaf Extracts ◽  
Dioscorea Rotundata ◽  
Southwest Nigeria

scholarly journals Comparative Antibacterial Efficacy of Vitellaria paradoxa (Shea Butter Tree) Extracts Against Some Clinical Bacterial Isolates

2015 ◽  
Vol 7 (3) ◽  
pp. 264-268 ◽  
Author(s):  
Kamoldeen Abiodun AJIJOLAKEWU ◽  
Fola Jose AWARUN
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Klebsiella Pneumoniae ◽  
Bacterial Pathogens ◽  
Stem Bark ◽  
Antibacterial Activities ◽  
Shea Butter ◽  
Vitellaria Paradoxa ◽  
Ethanolic Extracts

The antibacterial activities of the ethanolic extracts of seed, leaf and stem bark of Vitellaria paradoxa were investigated. The extracts were tested against three clinical bacterial pathogens, Staphylococcus aureus, Escherichia coli and Klebsiella pneumoniae using the agar diffusion and the broth dilution techniques. Ethanolic extracts of the plant parts showed activity against all the bacterial pathogens tested. At the highest extract concentration (200 mg/ml), the leaf extract exhibited the highest antimicrobial activity, while no activity was detected at the lowest concentration (3.13 mg/ml) against the tested isolates. Escherichia coli and Staphylococcus aureus were more susceptible to all extracts of V. paradoxa, while Klebsiella pneumoniae showed the least sensitivity. The efficacy of ethanolic extracts of Vitellaria paradoxa was compared to a commercial antibiotic streptomycin. There were differences in the minimum inhibitory concentration (MIC) of all the Vitellaria paradoxa ethanolic extracts with respect to the type of organism. All extracts exhibited bacteriostatic effects against the tested organisms at the experimented concentrations. Qualitative phytochemical screening of the extracts revealed the presence of saponins, tannins and alkaloids as the active principles of Vitellaria paradoxa's antimicrobial activity. V. paradoxa could be used as a potential source of antibiotic substance for a drug development.

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