Short communication: Iodine concentrations in serum, milk, and tears after feeding Ascophyllum nodosum to dairy cows-A pilot study.

摘要: Kelp (Ascophyllum nodosum) is rich in iodine and often fed by organic dairy producers as a mineral supplement to support animal health. A commonly held belief that kelp supplementation decreases susceptibility infectious bovine keratoconjunctivitis due increased concentrations tears. Whereas serum milk are positively correlated modulated oral supplementation, nothing known about the concentration of Therefore, 3 objectives this pilot study were determine (1) content tears, milk, cows after being for 30d; (2) trace thyroid status before (d 0) (3) vitro growth rate bacteria tears (Moraxella bovis) or (Staphylococcus aureus, Escherichia coli, Streptococcus uberis) collected from no 30). Cows (n=3/treatment) individually 56g per day not (n=3/no treatment) 30 d. Daily feed intake TMR was recorded weekly TMR, kelp, blood tear samples analyzed iodine. The pooled further other minerals. On d 0 30, liver biopsies hormone concentrations, respectively. An inhibition test used tear-soaked plates kelp-fed 30) well 1 7.5% positive distilled water negative control. As expected, with concentrations. significantly during 30-d study, only numerically these compared control group. Liver profiles comparable between groups generally did change over course study. Thyroid hormones remained overall within reference range throughout trial. Neither nor inhibited any plated bacteria. In summary, feeding levels Bacterial cattle vitro, prevention would be based solely on