To investigate a possible Clostridioides difficile reservoir in the Czech Republic, we performed a study in 297 calves from 29 large-scale dairy farms. After enrichment, faecal samples were inoculated onto selective agar for C. difficile. From the 297 samples, 44 C. difficile isolates were cultured (prevalence of 14.8%, 10 farms). The Holstein breed and use of digestate were associated with C. difficile colonisation (p ˂ 0.05). C. difficile isolates belonged to the ribotype/sequence type: RT033/ST11 (n = 37), RT126/ST11 (n = 6) and RT046/ST35 (n = 1). A multiple-locus variable-number tandem-repeat analysis revealed four clonal complexes of RT033 isolates and one clonal complex of RT126 isolates. All isolates were sensitive to amoxicillin, metronidazole and vancomycin. Forty isolates were resistant to ciprofloxacin, twenty-one to clindamycin, seven to erythromycin, seven to tetracycline and six to moxifloxacin. Moxifloxacin resistant isolates revealed an amino-acid substitution Thr82Ile in the GyrA. In conclusion, the calves of Holstein breed from farms using digestate as a product of bio-gas plants are more likely to be colonised by clonally-related C. difficile of ST 11 represented by ribotypes 033 and 126. The identified resistance to moxifloxacin with a Thr82Ile substitution in the GyrA highlights the need for further monitoring by the “One health approach”.

The purpose of the study was to obtain values of acid-base balance and basic biochemical parameters in neonatal kids of the White Shorthaired goat depending on colostrum intake. The research was focused on changes in acid-base balance parameters and basic biochemical parameters in neonatal kids before and two hours after colostrum intake. Total of 66 blood samples were taken from 33 neonatal kids. Blood pH, partial pressure of carbon dioxide (pCO 2 ), partial pressure of oxygen (pO 2 ), bicarbonate concentration (cHCO 3 -), base excess (BE), oxygen saturation (cSO 2 ), total carbon dioxide (TCO 2 ), sodium (Na + ), potassium (K + ), calcium (Ca 2+ ), chloride (Cl -), glucose (Glu), lactate (Lac), creatinine (Crea), hematocrit (Hct) and haemoglobin (Hgb) were measured. There were no statistically significant differences in acid-base balance parameters such as pO 2 , pCO 2 , TCO 2 , cSO 2 and biochemical parameters such as Na + , K + , Ca 2+ , lactate between the two groups -before colostrum intake (group BF) and after colostrum intake (group AF). There were statistically significant differences in acid-base balance parameters such as pH, BE, cHCO 3 between these groups. Differences in acid-base values of pH, BE and cHCO 3 were statistically significant (p˂0.05). Differences in biochemical values of creatinine and glucose were statistically significant (p˂0.05). Differences in values of hematocrit and haemoglobin were statistically significant (p˂0.05). The present results are important for veterinary practice and can improve the neonatal care especially for impaired kids.