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With advances in next generation sequencing and microscopy, a clearer picture is beginning to emerge about the predatory properties of Bdellovibrio and like organisms (BALOs). BALOs are Gram negative microorganisms which are natural predators of other Gram-negative microorganisms, especially those associated with diseases in humans and animals. One of the limitations of BALOs is their inability to prey upon Gram-positive organisms that cause the bulk of human diseases. The global spread of antibiotics resistance to almost every group of antibiotics, and the paucity of newer antibiotics since 1970s is very worrisome. The ability of BALOs to decimate pathogen populations principally those carrying multidrug résistance genes coupled with the increasing rate of antibiotics resistance, has made them an attractive option as biocontrol agents. With the absence of resistance to BALOs, these much anticipated “magic bullets” will certainly find more and more applications in health, agriculture, medicine and environment in the nearest future.
Telfairia occidentalis leaves and Cucumis sativus (cucumber) are vegetables that grow best in Tropical countries like Nigeria and have good nutritional properties but are highly perishable. Both vegetables were evaluated for wine production singly and in composite forms using palm wine and Baker’s yeast strains. In addition to wine production, the vegetables were screened for phytochemicals, anti-nutrients and nutrients (proximate composition, elements and vitamins) using standard methodologies. Proximate composition (g/100g dry matter) revealed that T. occidentalis leaves had moisture content, ash, protein, fat, fibre and carbohydrate contents of 86.60±0.10, 5.72±0.02, 4.30±0.10, 0.97±0.02, 6.30±0.10 and 82.45±0.02, respectively. In contrast, Cucumis sativus had a moisture content, ash, protein, fat, fibre and carbohydrate contents of 96.75±0.01, 5.40±0.02, 13.50±0.02, 10.30±0.10, and 66.12±0.01, respectively. Both plants contained various phytochemicals, including alkaloids, glycosides, saponins, tannins, flavonoids, reducing compounds and polyphenol, but not anthraquinones and phlabotanins. However, on quantification, reducing compounds and polyphenol recorded the highest concentrations. Vitamins A and C were detected in both samples. C. sativus had high amounts of K, P, and Mg and moderate amounts of Ca, Na, Cu, Fe and Mg. T. occidentalis leaves had moderate amounts of Ca, Zn, Fe, Mg, Ca and Na. Anti-nutrients levels were all below allowable regulatory limits for vegetables. Density, pH and alcohol values ranged from 0.20 - 0.99, 0.30- 4.6 and 1.95 - 9.94%, respectively. Sensory evaluation of the wine samples showed that wine produced from 70% fluted pumpkin and 30% cucumber had the best scores in terms of acceptability, taste, aroma and appearance. Given the findings in the study, wine production using tropical vegetables could double as a viable alternative to tropical fruits and also help to curb post-harvest losses commonly experienced in the tropics.
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