scholarly journals Vitamin A status of neonatal foals assessed by serum retinol concentration and a relative dose response test

1996 ◽  
Vol 12 (3) ◽  
pp. 181-183 ◽  
Author(s):  
K M Greiwe-Crandell ◽  
D S Kronfeld ◽  
L S Gay ◽  
D Sklan ◽  
P A Harris
Keyword(s):  
Vitamin A ◽  
Dose Response ◽  
Serum Retinol ◽  
Response Test ◽  
Vitamin A Status ◽  
Serum Retinol Concentration ◽  
Retinol Concentration

scholarly journals Proxy Markers of Serum Retinol Concentration, Used Alone and in Combination, to Assess Population Vitamin A Status in Kenyan Children

2015 ◽  
Vol 5 (5) ◽  
pp. 615-616
Author(s):  
Elise Talsma ◽  
Hans Verhoef ◽  
Inge Brouwer ◽  
Anne Mburu-deWagt ◽  
Paul Hulshof ◽  
...  
Keyword(s):  
Vitamin A ◽  
Serum Retinol ◽  
Vitamin A Status ◽  
Serum Retinol Concentration ◽  
Retinol Concentration

Vitamin a megadoses during early infancy on serum retinol concentration and acute side effects and residual effects on 6 month follow-up

1997 ◽  
Vol 17 (4) ◽  
pp. 649-659 ◽  
Author(s):  
Dilip Mahalanabis ◽  
Mohammed M. Rahman ◽  
Mohammed A. Wahed ◽  
Mohammed A. Islam ◽  
Demissie Habte
Keyword(s):  
Side Effects ◽  
Vitamin A ◽  
Early Infancy ◽  
Residual Effects ◽  
Serum Retinol ◽  
Acute Side Effects ◽  
Serum Retinol Concentration ◽  
Retinol Concentration

scholarly journals Vitamin A absorption in children with ascariasis

1993 ◽  
Vol 69 (3) ◽  
pp. 817-825 ◽  
Author(s):  
F. Ahmed ◽  
M. Mohiduzzaman ◽  
A. A. Jackson
Keyword(s):  
Vitamin A ◽  
Oral Dose ◽  
Ascaris Lumbricoides ◽  
Social Background ◽  
Dhaka City ◽  
Slum Area ◽  
Serum Retinol ◽  
Serum Retinol Concentration ◽  
Average Serum ◽  
Retinol Concentration

The effect of Ascaris lumbricoides infection on retinol absorption was investigated in young children from a slum area of Dhaka City, Bangladesh. Twenty-four children aged 4–10 years were screened and in every case eggs of either Ascaris, Trichuris or hookworm were isolated from the stool. The average serum retinol was 0.91 (sd 0.35) μmol/l and sixteen children had levels below 1.05 μmol/l. This compared with a serum retinol concentration of 1.70 (sd 0.52) μmol/l in five reference children from a more privileged social background. An oral dose of retinol (41.8 μmol) was given, to ten children in whom the concentration of Ascaris eggs in the stool varied. Less than 1% of the supplement could be recovered in the stools collected over the following 48 h. Ascaris worms were isolated from the stool and assayed for retinol content. In no case was retinol detected in the worms. These findings do not support the contention that infection with Ascaris predisposes to malabsorption of vitamin A.

Serum Vitamin A and E Concentrations in Acute Falciparum Malaria: Modulators or Markers of Severity?

1994 ◽  
Vol 87 (5) ◽  
pp. 505-511 ◽  
Author(s):  
Timothy M. E. Davis ◽  
Tran Quang Binh ◽  
Phan Thi Danh ◽  
John R. Dyer ◽  
Andrew St John ◽  
...  
Keyword(s):  
Vitamin E ◽  
Vitamin A ◽  
Serum Creatinine ◽  
Serum Vitamin ◽  
Serum Creatinine Concentration ◽  
Serum Retinol ◽  
Creatinine Concentration ◽  
Control Subjects ◽  
Serum Retinol Concentration ◽  
Retinol Concentration

1. To assess the association between vitamin A, vitamin E and the clinical course of severe malaria, serial morning blood samples were taken from 24 Vietnamese patients, aged 18–62 years, receiving intensive treatment for complicated Plasmodium falciparum infections. A single fasting blood sample was also taken from 10 control subjects aged 22–45 years. Serum retinol, carotene and vitamin E concentrations were measured by h.p.l.c. 2. Admission serum retinol concentration was depressed relative to that of the control subjects (0.69 ± 0.35 versus 1.86 ± 0.41μmol/l mean ± SD, P < 0.001) and correlated inversely with indices of hepatic function, but positively with the simultaneous serum creatinine concentration (P < 0.05). During the first week of treatment, serum retinol concentration increased in parallel with improving liver function, whereas serum creatinine concentration remained elevated in the majority of patients. Serum α- and β-carotene concentrations remained depressed throughout. 3. Serum vitamin E concentration, corrected for total serum cholesterol concentration in the form of a ratio, was also depressed at presentation (3.1 ± 1.8×103 versus 4.2 ± 0.8×103 in control subjects; P < 0.05), but tended to be higher than the control value at the time of discharge (0.1 > P > 0.05); there was a significant correlation between admission ratio and parasite clearance time (P = 0.04). 4. On the basis of this and previous studies, vitamin A replacement could be considered in selected severely ill patients without renal impairment. As found previously in animal models, depressed vitamin E levels may have a beneficial effect on the course of malarial infection.

scholarly journals Impact of promotion of mango and liver as sources of vitamin A for young children: a pilot study in Burkina Faso

2006 ◽  
Vol 9 (6) ◽  
pp. 808-813 ◽  
Author(s):  
CP Nana ◽  
ID Brouwer ◽  
NM Zagré ◽  
FJ Kok ◽  
AS Traoré
Keyword(s):  
Pilot Study ◽  
Vitamin A ◽  
Burkina Faso ◽  
Financial Support ◽  
Control Area ◽  
Serum Retinol ◽  
Treatment Groups ◽  
Parallel Design ◽  
Serum Retinol Concentration ◽  
Retinol Concentration

AbstractObjectiveTo assess the effectiveness of a behaviour change approach, with or without financial support, in improving vitamin A (VA) intake and serum retinol concentration through mango and liver consumption by children.DesignA parallel design (no control area) was used to assess changes in VA intake and serum retinol over a 15-week period.Setting and subjectsA pilot study was implemented in the Department of Kokologho, a rural area in central west Burkina Faso. One hundred and fifty children aged 2–3 years were randomly selected and assigned to two treatment groups: PA$$ (promotional activities and financial support) and PA (promotional activities).ResultsThe intervention significantly increased (P<0.001) total VA intake by 56% in PA$$ and by 50% in PA. VA intake from liver increased significantly (P<0.001) from 12.7±23.5 to 155.3±56.3 μg retinol activity equivalents (RAE) in PA$$ and from 21.6±29.7 to 135.3±44.9 μg RAE in PA. Changes in VA intake from liver were significantly higher (P=0.004) in PA$$ compared with PA. Mean serum retinol concentration increased significantly by 26% (P<0.001) in PA$$ and 30% (P<0.001) in PA. Changes in serum retinol concentration (0.13 μmol l−1 in PA$$ vs. 0.17 μmol l−1 and in PA) did not differ significantly (P=0.455) between groups over the intervention.ConclusionPromotional activities on mango and liver intake effectively increased VA intake and serum retinol concentrations. Although an additional beneficial effect of financial support on liver intake was observed, this did not translate into a further increase in serum retinol concentration.

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