Effects of feeding 25-hydroxyvitamin D3 with an acidogenic diet during the prepartum period in dairy cows: Mineral metabolism, energy balance, and lactation performance of Holstein dairy cows

Our objective was to determine the effects of feeding 25-hydroxyvitamin D₃ [25(OH)D₃], or vitamin D₃ (cholecalciferol) on plasma, mineral, and metabolite concentrations, mineral balance, mineral excretion, rumination, energy balance, and milk production of dairy cows. We hypothesized that supplementing 3 mg/d of 25(OH)D₃ during the prepartum period would be more effective than supplementing vitamin D₃ at the National Research Council (2001) levels to minimize calcium imbalance during the transition period and improve milk production of dairy cows. Forty multiparous, pregnant nonlactating-Holstein cows were enrolled in this study. Body weight, body condition score, parity, and milk yield in the previous lactation (mean ± standard deviation) were 661 ± 59.2, 3.46 ± 0.35, 1.79 ± 0.87, and 33.2 ± 6.43 kg/d, respectively. Cows were enrolled into the blocks (n = 20 for each treatment) at 30 d of the expected day of calving to receive an acidogenic diet (373 g/kg of neutral detergent fiber and 136 g/kg of crude protein, dry matter basis; -110 mEq/kg) associated with the treatments: (1) control (CTRL), vitamin D₃ at 0.625 mg/d (equivalent to 25,000 IU of vitamin D₃/d) or (2) 25(OH)D₃ at 3 mg/d (equivalent to 120,000 IU of vitamin D₃/d). All cows were fed with the base ration for 49 d after calving. Blood samples were taken on d 7, 0, 1, 2, 21, and 42, relative to calving. No effect of treatment was observed for prepartum dry matter intake or body condition score. A trend for increase of ionized Ca was observed for the cows fed 25(OH)D₃, compared with the CTRL, but no effect of treatment was detected for total Ca or total P. Feeding 25(OH)D₃ increased colostrum yield. The plasmatic concentration of 25-hydroxyvitamin D₃ was increased with 25(OH)D₃ supplementation. 25-Hydroxyvitamin D₃ supplementation increased plasma glucose concentration at parturition. The postpartum dry matter intake was not influenced by treatments. Feeding 25(OH)D₃ increases milk yield, 3.5% fat-corrected milk, and energy-corrected milk and improves milk yield components in early lactation. Overall, these findings suggest that 25(OH)D₃ at 3 mg/d can improve the energy metabolism and lactation performance, compared with the current-feeding practice of supplementing vitamin D₃ at 0.625 mg/d.

Nutritional and clinical status of children admitted to the malnutrition ward, Maputo central hospital: a comparison of data from 2001 and 1983

Malnutrition is the fourth commonest reason for hospital admission to the paediatric department of the Central Hospital, Maputo and has the second highest death rate (20 per cent). A study from 1995 into mortality at this paediatric department, suggested an increase in severe malnutrition. Recent studies have shown that the global burden of undernutrition in the world is declining; however, data for Eastern Africa shows a deterioration. The current study was aimed at describing and comparing the patients on the malnutrition ward, in 2001 and 1983. The study gathered indices of nutritional status and secondary diagnoses from the notes of all children (aged between 6 months and 5 years) discharged from the malnutrition ward for a period of l year (January-December 2001), and from data (collected in January-December 1983) for the malnutrition ward. Data was entered and analysed using Epi-Info 6 and SPSS statistics package. The ethics committee of the hospital approved the study. Data was collected for 558 children in 2001 and 833 in 1983. There was no gender difference, average age was 21.7 months in 2001 and 23.8 months in 1983 and the average hospital stay was 13.1 and 14.3 days, respectively. In 2001, 33 per cent had kwashiorkor, 26 per cent marasmus, and 28 per cent marasmic kwashiorkor. Three hundred and twenty children (82 per cent) were <2 Z-scores below the median weight-for-age and 252 children (65 per cent) were <3 Z-scores. Forty per cent had malaria, 65 per cent anaemia, 53 per cent bronchopneumonia, 14 per cent TB, 36 per cent diarrhoea, and 12 per cent HIV/AIDS. In 1983, 49 per cent had kwashiorkor, 17 per cent marasmus, and 11 per cent had marasmic kwashiorkor. A total of 494 children (81 per cent) were <2 Z-scores below the median weight-for-age and 335 children (55 per cent) were <3 Z-scores. Eighteen per cent had malaria, 37 per cent anaemia, 28 per cent bronchopneumonia, 6 per cent TB, 8 per cent diarrhoea, and 4.4 per cent measles/post-measles. A comparison between the clinical status of 1983 with that of 2001 shows little difference in age, gender or length of stay. There were fewer admissions in 2001, although a higher percentage of severely underweight children and the 2001 group had more secondary infections, especially malaria, bronchopneumonia and anaemia. Clinical malnutrition at a referral hospital level, in spite of the remarkable Mozambican economic growth, shows signs of following the depressing pattern for much of Eastern Africa. A prospective study including HIV tests and anthropometric data for this and the city's other hospitals is warranted. Discussion needs to be prompted on a local level about malnutrition and the use of guidelines.

The impact of living on the streets on latency children's friendships

OBJECTIVE

This is a study to evaluate friendships in latency street boys of Porto Alegre, RGS, Brazil.

METHODS

A sample of 30 latency street boys was compared with a sample of 51 latency boys living with their low income families, using the Cornell Interview of Peers and Friends (CIPF).

RESULTS

The two groups had a significantly different CIPF global scores, and the boys of the street group had the highest mean score. Also, boys of the street had significantly lower developmental appropriateness, self-esteem and social skills scores than boys living with a family.

CONCLUSIONS

The urgent need for intervention street children, especially on boys of the street, is emphasized.