**Katarzyna Sli ˙ ´ zewska 1,\*, Paulina Markowiak-Kope´c 1,\*, Anna Sip 2, Krzysztof Lipi ´nski <sup>3</sup> and Magdalena Mazur-Ku´snirek <sup>3</sup>**


Received: 24 August 2020; Accepted: 7 September 2020; Published: 9 September 2020

**Abstract:** The feed supplementation of probiotic microorganisms is a promising method for detoxification of ochratoxin A (OTA) in poultry. The aim of the study was to investigate the effect of newly elaborated synbiotics on the turkey performance, the intestinal microbiota and its enzymatic activity in turkeys (0–15 weeks) fed OTA contaminated feed (198.6–462.0 μg/kg) compared to control group (OTA-free feed). The studies determined the composition of intestinal microorganisms by the culture method and the activity of fecal enzymes by spectrophotometry. It was found that OTA had an adverse effect on the body weight, the intestinal microbiota and the fecal enzymes activity in turkeys. On the other hand, synbiotics resulted in an increase in the count of beneficial bacteria while reducing the number of potential pathogens in the digestive tract. Moreover, synbiotics caused an increase in the activity of α-glucosidase and α-galactosidase, while decreasing the activity of potentially harmful fecal enzymes (β-glucosidase, β-galactosidase, β-glucuronidase) in the turkey's excreta. Results indicate a beneficial effect of elaborated synbiotics on the health of turkeys and a reduction of the negative impact of OTA contaminated feed. These synbiotics can be successfully used as feed additives for turkeys.

**Keywords:** synbiotics; turkeys; intestinal microbiota; fecal enzymes; ochratoxin A

**Key Contribution:** New elaborated synbiotics have beneficial effects on turkey health and reduce the negative impact of OTA contaminated feed. These synbiotics can be successfully used as feed additives for turkeys.
