Abstract
ABSTRACT The objective was to evaluate the effects of cranberry on blood and urinary parameters of dogs (experiment I), digestibility of nutrients (experiment II), palatability of diet (experiment III) and the influence of cranberry on E. coli UPEC-MRHA fimbriae in vitro (experiment IV). For experiment I and II, ten dogs were fed with diets containing 0% or 0.4% cranberry for 30 days. Experiment III compared the diets containing 0% and 0.4% cranberry using 16 adult dogs. There were no statistical differences (P>0.05) in the blood parameters evaluated. Dogs consuming cranberry presented lighter color and appearance of urine, compared to the control group (P<0.05). The diet containing cranberry showed higher digestibility of dry matter, organic matter, ether extract, higher metabolizable energy (P<0.05) and reduced fecal sialic acid concentration (P<0.05) compared to the control diet. There was no influence of cranberry on the formation of fimbriae of E. coli UPEC-MRHA. There was a lower intake ratio of the diet containing cranberry (P<0.05). The inclusion of 0.4% cranberry increases the digestibility of nutrients and influences the color and appearance of urine of dogs. However, it reduces diet palatability and does not alter the adhesion of E. coli UPEC-MRHA in vitro.
Highlights
The cranberry (Vacciniummacrocarpon aiton) is a native plant from northern hemisphere and is recognized for its therapeutic and prophylactic effects (Catão et al, 2015)
The objective was to evaluate the effects of cranberry on blood and urinary parameters of dogs, digestibility of nutrients, palatability of diet and the influence of cranberry on E. coli UPEC-MRHA fimbriae in vitro
There was no influence of cranberry on the formation of fimbriae of E. coli UPEC-MRHA
Summary
The cranberry (Vacciniummacrocarpon aiton) is a native plant from northern hemisphere and is recognized for its therapeutic and prophylactic effects (Catão et al, 2015). Due to scientific evidence on the efficacy of this fruit in preventing and assisting the treatment of lower urinary tract diseases (LUTD) in humans (Olby et al, 2017), research on the effects of the dietary supplementation of cranberry to animals has increased (Mazutti et al, 2012). Proanthocyanidins type A, catechins, and organic acids (citric, malic, quinic, benzoic and glucuronic acid) (Raz et al, 2004). Proanthocyanidins type A are capable of inhibiting bacterial adhesion to the urinary tract, reducing the risk of infection, as demonstrated in humans (Olby et al, 2017). Proanthocyanidins, cathechins and organic acids have been shown to improve the gutmucus layermorphology, reduce gut inflammation and oxidative stress, and to potentially reshape the gut microbiota ecology, aiding in eubiose in mice (Anhê et al, 2014)
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