ABSTRACT
Cows experience many physiological, nutritional and social changes during transition period. This study aims to evaluate the differences in nutrients total-tract digestibility (nTTD) between primiparous (PP) and multiparous (MP) cows through the transition period. From -23, -5, 0, 7, 14, and 30 days from calving a sample of feed and feces samples were collected from 25 Holstein cows (11 PP and 14 MP) as well as daily rumination time through accelerometers. The results show that average nTTD were different (p ≤ 0.02) for amylase-treated neutral detergent fiber organic matter (aNDFom) and potentially digestible neutral detergent fiber (pdNDF240; 52.5 vs. 54.0 and 78.8 vs. 81.3, respectively in PP vs. MP), while no differences were found regarding pdNDF24 and starch (88.5 vs. 88.6 and 95.1 vs. 96.1, respectively in PP vs. MP). Total-tract starch digestibility (TTstarchD) was different among timepoints (p < 0.01), going from an average of 91.40 up to 97.39% of starch, on times -23 and 14, respectively. Differences in total-tract digestibility of aNDFom among timepoints (p < 0.01) was expected because of differences in diet composition among lactating and non-lactating cows. No differences in daily rumination time (p = 0.92), TTstarchD and total-tract potentially digestible NDF digestibility at 24 h (TTpdNDF24D) were recorded. Our findings show that fiber digestibility during the transition period is higher in MP probably for a different ruminal retention time. These differences should be considered when formulating rations for groups with different parity number.
ABSTRACT
PURPOSE: To investigate demographics, causes, features, and visual outcomes of pediatric uveitis. METHODS: Retrospective cohort study including 257 patients younger than 16 years. RESULTS: Mean age at onset of uveitis was 8.54 +/- 3.98 years; 54.5% of the patients were girls. Anterior uveitis occurred in 47.8%, intermediate in 19.4%, posterior in 24.9%, panuveitis in 7.8%. Ocular involvement was bilateral in 67.8%. Infectious uveitis represented 31% of all cases. Causes of severe visual loss were cataract, macular scars, macular edema/maculopathy, and secondary glaucoma. At follow-up 79.3% of eyes maintained a visual acuity between 20/32 and 20/20. CONCLUSIONS: Uveitis is rarer in children than in adults. Patients with anterior uveitis comprised the largest group. Posterior uveitis in the pediatric population has a lower incidence than some decades ago. Visual prognosis of pediatric uveitis is improving, owing to an earlier diagnosis and a correct treatment.
