Efficacious rat model displays non-toxic effect with Korean beechwood creosote: a possible antibiotic substitute

Abstract

Wood creosote, an herbal anti-diarrheal and a mixture of major volatile compounds, was tested for its non-toxicological effects, using a rat model, with the objective to use the creosote as an antibiotic substitute. A total of 30 Sprague-Dawley rats were studied to form five groups with 6 rats each. Korea beechwood creosote was supplemented into three test groups with 0.03 g/kg, 0.07 g/kg and 0.1 g/kg body weight/day without antibiotic support, along with a positive control of Apramycin sulphate (at 0.5% of the daily feed) and a negative control. Korean beechwood creosote supplementation showed no negative effect on the body weight gain in comparison to the negative and the positive control groups and the feed conversion ratio was also comparable with that of the control groups. The clinical pathology parameters studied were also under the umbrella of normal range, including liver specific enzymes, blood glucose, total protein, blood urea nitrogen (BUN), which indicated no toxic effect of creosote at the given doses. The non-hepatotoxic effect was also confirmed using hepatic damage specific molecular markers like Tim-p1, Tim-p2 and Tgf-β1. The results suggested that Korean beechwood may be used as antibiotic substitute in weanling pigs feed without any toxic effect on the body. Although the antimicrobial properties of creosote were not absolutely similar to those of apramycin sulphate, they were comparable.

Anti‐parasitic function of tree‐rubbing behaviour in brown bears suggested by an in vitro test on a generalist ectoparasite

“…To our knowledge, there is no study on potential anti‐ectoparasitic effect of beech tar itself. However, its derivatives have been used as therapeutic agents of anti‐microbial and anti‐fungal potential since the early 1800 s (Quynh et al., 2014). Indeed, wood tars are highly complex chemicals that contain compounds with anti‐septic properties, such as phenols (i.e., guaiacol; Food and Agriculture Organization, 1983), and are used to treat hoof and skin conditions in animals (Barnes & Greive, 2017).…”