Arash Shahmohammadi, Ali Kargarie Rezapour and Afshin Zakeri
The aim of this study was the investigation of effect of vitamin D3 supplementation on antibiotic therapy of mastitis in cattle. The overall 14 head of dairy cow clinically infected with mastitis was divided into two control and treatment groups. In treatment group we used intramuscular vitamin D3 supplementation in addition to antibiotic therapy. Measured indices were: rectal temperature, daily milk yield, somatic cell count, Calfornian mastitis test. Repeated measurements method was used for statistical analysis. The results showed that there was no significant difference between two groups (P>0.05). Although in prior study, intra-mammary infusion of vitamin D3 has therapeutic effect in experimental mastitis, intramuscular injection of this supplement couldn't improve the antibiotic therapy process of naturally occurring mastitis.
