Acceptability of chicken powder in home prepared complementary foods for children in Ghana.
Childhood malnutrition continues to be a burden in developing countries, particularly in sub-Saharan Africa . In sub-Saharan Africa, approximately 42% of preschool children are stunted . Mokhtar et al.  have also reported persistent undernutrition mostly in sub-Saharan African countries including Ghana. de Onis and Blossner  have reported undernutrition among preschool children to be a significant public health problem, while the Food and Agricultural Organization (FAO)  has observed that micronutrient deficiencies, especially iron, zinc, iodine and vitamin A are unusually high within this region of the world. The FAO report suggests that 76.5% of preschool children are anemic, while 10.0% die from micronutrient deficiency and associated illnesses. To combat the problem of under nutrition in Sub-Saharan Africa and other developing countries around the world, humanitarian food aid has typically been distributed to vulnerable groups in these countries who are at greatest risk for malnutrition. In most cases, the affected groups have used this humanitarian food aid as a replacement instead of as a supplement to their inadequate and less nutritious diet. Other programs have also used fortified food-aid commodities as a means of improving the nutritional content and inadequacy of the diet of children in emergency as well as in extreme hunger.
To this end, a number of formulations have either been proposed or tested with the hope of using them to prevent or manage malnutrition among children, especially in developing countries, with little success [3-7]. This is because most of these programs have operated within the confines of an institution or a particular setting without the direct involvement of families/households in the preparation of the therapeutic food as well as the treatment or management of childhood malnutrition. The continued increase in childhood malnutrition in sub-Saharan Africa suggests behavioral, cultural and environmental factors may be driving this public health problem. So far, most intervention and supplementation programs have not been sustainable or routinely incorporated into the child's diet at the household level because of cost, acceptability and availability of the fortificant in the local communities and households. There is, therefore, a need for a fortificant which is cheap, acceptable and easily incorporated into the child's diet at the household level by the primary care-giver without the potential for toxicity. Chicken powder (CP) may be able to be used as a fortificant and provide a source of animal protein to a child's diet. Apart from being cheap, CP is a source of quality animal protein and essential micronutrients. CP also holds the potential of eliminating or reducing malnutrition in low-income communities within developing countries when incorporated into regularly consumed home prepared meals as well as be used in emergency food aid. Chicken powder provides health benefits in addition to quality protein, fatty acids and essential micronutrients (Table 1). The protein content of CP (72-75%) exceeds both that of Corn Soy Blend (CSB; 17%) and Defatted Soy Flour (DSF; 50%) by weight. For example, the poor digestibility of protein, if any, in the diets of children from developing countries is due to the use of cereals and pulses such as beans and lentils as major sources of protein (Report of the Joint FAO/WHO Expert Consultation 1990). This makes CP an important ingredient in the diet of preschool children, who because of their rapid growth and small stomach volume, need quality protein and other essential nutrients to prevent malnutrition, particularly protein-energy malnutrition and stunting. Again, in underserved areas where high quality protein is not available or limited because of cost, CP would serve as an excellent supplement to local diets. Chicken, unlike beans and grains, contains no phytates that interfere with mineral absorption.
The purpose of this study was to assess the acceptability of incorporating CP in the child's diet at the household level. Data from this study could subsequently be used to design an intervention to examine the impact of adding CP in the child's diet on the growth, development and nutritional status of undernourished children.
MATERIALS AND METHODS
Study design and population
This acceptability study was carried out in December 2009 among mothers and children in a farming community (Otinibi) in the Greater Accra Region of Ghana. Measured quantities of CP were added to a breakfast meal (Tom Brown Porridge) and lunch/dinner meal (rice and stew/gravy), which were respectively served to mothers and children on two different days. A convenient sample of 53 mothers aged 18 - 40 years and 58 children aged 2 - 5 years participated in this study. The convenient sample was made up of mother-child pairs, residents of Otinibi who have previously participated in research projects conducted by the research team in the community and were accessible to the researchers. Each meal consisted of four different samples containing different amounts of CP to provide about 20 grams of protein according to the World Health Organization recommendation for pre-school children. Mothers and children were served the four samples of each meal to taste and rate the liking separately. They were also asked to provide comments on each sample. For the younger children, research assistants used a scale consisting of different facial expressions to score the level of acceptance of the sample depending on the child's facial expression after tasting each sample.
The breakfast meal used in this study was a porridge locally called "Tom Brown". This porridge is consumed by the majority of households in the study community as well as in most of Ghanaian households. The porridge is usually made from roasted white maize (corn), mixed/dissolved in water, added salt, boiled till some degree of gelling and served with sugar added. Depending on the household food security or socio-economic status, this may be eaten as is (described) or with milk added, with or without bread. For the study, four different porridges prepared were made up of 1 part maize-chicken blend and 9 parts water. The porridges were made with roasted white maize and chicken powder in the following proportions:
1. 100% roasted maize by weight (no chicken powder)-control
2. 85% roasted maize by weight + 15% chicken powder by weight
3. 80% roasted maize by weight + 20% chicken powder by weight
4. 75% roasted maize by weight + 25% chicken powder by weight
Two teaspoons of ordinary table salt (NaCl) and 200g of sugar were added to each batch of mixture, stirred until boiling and allowed to boil under medium heat for 10 minutes.
For the lunch/supper meal for the study, we used white steamed rice with gravy. Regular steamed white rice was used, with four different gravies containing different amounts of the chicken powder. The gravy was prepared from tomatoes, peppers, onions, salt, vegetable oil and containing no CP (control sample), 15% CP, 20% CP and 25% CP.
Presentation, Tasting and Rating of Samples
Each food item consisted of four samples served into different coded cups (for the porridge) and plates (for the rice and gravy). The porridge was served on the first day of the study while the rice and gravy was served the following day. On the first study day, a field research assistant presented a tray holding the four porridge samples in cups and spoons to mothers and children (both male and female) to be tasted and rated separately. The rice and gravy was presented in a similar manner the following day but coded differently from the porridge. Participants tasted each of the four samples of the day and provided their ratings for likeness. Between tasting of samples, participants were given water to rinse their mouth after tasting in order to avoid carryover of sensory properties like taste and flavor from the previous sample. Each sample was rated on a 5-point scale (dislike very much ; dislike moderately ; neither like nor dislike ; like moderately ; like very much ).
The study was approved by the Institutional Review Board of the University of Georgia, and all mothers provided oral consent on behalf of their children and on their own behalf before participating in the study.
Data was entered and analyzed using SPSS for Windows (version 17.0). Analysis of Variance (ANOVA) and paired sample t-test were used to examine the differences in sensory characteristics between samples within the breakfast meal or lunch/supper meal according to participants rating for likeness. A p-value of <0.05 was set as the criterion for statistical significance.
Ratings of the preference for the breakfast porridge
For the breakfast porridge, no significant difference in preference of test samples among both mothers and children between samples was observed, although the control sample (not containing any chicken powder) had the highest average score. The preference as well as the overall ratings was very similar among mothers and children (Table 2). Besides the control breakfast meal receiving the highest average score for preference, the study participants preferred the test samples in this order: porridge containing 25% CP by weight and 75% roasted corn meal by weight, followed by porridge containing 15% CP by weight and 85% roasted corn meal by weight and finally porridge containing 20% CP by weight and 80% roasted corn meal by weight.
Comparing the preference between the control and test samples, no statistically significant differences in the acceptability among the mothers were observed, although the average preference score for the control sample was highest compared to the 3 test samples. For the children we observed a statistically significant difference in preference between the control sample and the sample containing 20% CP by weight and 80% corn meal by weight (p<0.05), but not any of the other samples or between test samples. Overall, the sample containing 20% CP was rated poorly by both children and mothers. The score indicates that the children liked or preferred the control sample to all the test samples with the same trend observed among the mothers, although that was not statistically significant.
Ratings of the preference for the rice and gravy
Both mothers and children scored the control sample (rice and gravy without added chicken powder) the highest on preference compared to the three test samples as in the case of the breakfast porridge (Table 3). There was statistically significant difference between the mean score for preference for mothers (p=0.01) but not the children. Further examination of the preference score using Tukey's HSD post-hoc test showed that mothers strongly preferred the control sample (gravy) over the tests samples. This was obvious in the homogeneity test conducted. The test for homogeneity of the samples showed that mothers were able to distinguish the samples into 2 unique groups, control sample (containing no chicken powder) versus the 3 test samples (containing different levels of dehydrated chicken powder in the gravy) (p<0.05). Another revealing observation reported by mothers is the difference in consistency between the test samples and the control sample with the test gravies being thicker in consistency than the control gravy. The data shows significant difference (p<0.05) between the mean scores for likeness for samples 0% vs 20%, 0% vs 25%, 15% vs 20%, 15% vs 25% but not 0% vs 15%, and 20% vs 25% as reported by mothers (Table 3). The difference between the control sample versus the test samples containing 20% and 25% CP was attributed to the unusually strong chicken flavor and thicker consistency.
For the children, although the control sample was scored highest on preference compared to the test samples, test for homogeneity did not detect any difference between the control sample and test samples as the case was with the mothers. Again, there were no statistically significant differences between pairs in terms of mean score for preference. This means that even though the children could detect that something had been added to some of the samples, they still liked them unlike their mothers. This is good news for incorporating the chicken powder in their regular diet as a means to improve their intake of quality protein and essential micronutrients.
Overall, both mothers and children liked food containing the chicken powder, although they scored the control samples for the porridge and gravy highest over the respective test samples because that is what they are used to. Consistently, the children scored the preference of each of the test samples higher compared to the scoring by the mothers, irrespective of being a porridge or rice and gravy. Mothers who participated in the study said they will definitely incorporate the chicken powder in food to feed their children and the entire family. Mothers enjoyed both the porridge and gravy containing the chicken powder and even requested to be given the left over samples to be used later. A majority of the mothers reported liking the taste, flavor and aroma of the test samples. The children also liked the sample very much as we could tell from their responses and demeanor and facial expressions during the testing and after.
Findings from the current study are similar to what has previously been reported in studies from other developing countries [8, 9, 10], although different products were used. In the study by Rowe et al.  where the acceptability of corn-soy blend was evaluated in Guatemala, Uganda and Malawi, a majority (74%) of the respondents said they liked the product because of its sensory characteristics. This observation was also confirmed in the present study, but it is important to mention that the nutritional value of chicken-powder incorporated in porridge or gravy by weight is better than the soy-corn blend [9, 11]. The protein content of the chicken powder by weight is far higher (72-75% versus 17%) compared to the corn-soy blend, although the Protein Digestibility Corrected Amino Acid Score (PDCAAS) values are similar. Also, the iron content of the chicken powder is higher than that of soy concentrate and other legumes generally used in the preparation of complementary foods in child feeding . Moreover, chicken powder contains heme iron which is readily absorbed compared to non-heme iron found in legumes, including soy concentrates . Chicken powder also contains higher amounts of selenium compared to other legumes . This, therefore, makes the chicken powder a superior option for use in the treatment and management of childhood malnutrition such as kwashiorkor.
The higher scoring of both control samples compared to test samples by mothers and children in this study is an indication of participants' familiarity with the control samples (not containing chicken powder). This observation is quite interesting in two ways. First, the participants' ability to score the control sample as the best is because it is what they are used to and have eaten over the years. Even though the control samples were scored higher for preference than the test samples, both mothers and children stated they still liked the porridge with various additions of CP. Second, both mothers and children scored the test sample containing 20% CP by weight the lowest compared to the other test samples, which was unexpected. It was expected that participants would score the test sample containing 25% CP by weight the lowest compared to the other test samples. This is because the test sample containing 25% CP by weight had more chicken flavor and was slightly thicker in consistency compared to the other samples. Assuming the corn flour used for the porridge and the other ingredients for the rice and gravy meal contain negligible protein, about 28 grams of chicken powder (almost the 25% CP by weight) provides the WHO recommended intake of protein of 20 grams for young children . Test of homogeneity also showed that both mothers and children could not tell the test samples (Tom Brown porridge) contained something different (in this case the chicken powder) from the control sample to which they are accustomed. For the gravy, the test of homogeneity suggested the children could not differentiate between the control and test samples, but the mothers did. This means mothers were able to tell the test samples contained something which was missing from the control sample. Some of the mothers were able to tell the test samples contained chicken whereas the control sample did not because of differences in flavor.
In summary, the results from the acceptability test as well as individual observations by the research team suggest that chicken powder with its high protein quality and essential micronutrient content could be incorporated in common staple foods to improve their quality in young child feeding. According to the findings, parents are more likely to incorporate the chicken powder in their children's diet if not for the entire family. Findings from this study, although promising in improving diet quality for the management and prevention of childhood malnutrition, should be interpreted with caution because of the convenient sample used limiting its generazability.
The authors are grateful to all mothers and children who participated in the study. We also wish to thank all the research assistants who assisted with the presentation of samples and data collection. We acknowledge the invaluable contribution to the conception of the study by EC Henley of Athens, Georgia, U.S.A.
The study was supported by funding from the International Dehydrated Foods Inc. MO, USA.
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Anderson A.K. (1), Bediako-Amoa B (2) and M Steiner-Asiedu (2)
* Corresponding author's email: firstname.lastname@example.org
(1) Department of Foods and Nutrition, University of Georgia
(2) Department of Nutrition and Food Science, University of Ghana
Table 1: Nutrient Content of Dehydrated Chicken Powder per 100 grams * Nutrient Unit Content Water g 605 Energy kcal 380 Protein g 72-75 PDCAAS 1.0 Total Lipid g 18 Carbohydrate g 0.0 Fiber g N/A Ash g 5 Calcium mg 1.03 Iron mg 12.7 Magnesium mg 0.085 Phosphorus mg 0.92 Potassium mg 0.38 Sodium mg 0.26 Zinc mg 7.8 Copper mg 0.247 Manganese mg 0.225 Selenium mcg 80 * Source of Analysis: Food Ingredients Technology Company, LLC. Springfield, MO PDCAAS:Protein Digestibility Corrected Amino Acid Score Table 2: Scoring for the Breakfast Meal (Tom Brown Porridge) Sample Mothers Children Porridge contains 4.38 [+ or -] 1.10 4.67 [+ or -] 0.51 no DCP (Control) Porridge contains 4.25 [+ or -] 1.18 4.33 [+ or -] 1.19 15% DCP by weight Contains 20% of 4.13 [+ or -] 1.16 4.21 [+ or -] 1.23 DCP by weight Porridge contains 4.32 [+ or -] 1.17 4.38 [+ or -] 1.01 25% of DCP by weight Each product was rated on a 5-point scale (dislike very much ; dislike moderately ; neither like nor dislike ; like moderately ; like very much]) Table 3: Scoring for the Lunch/Supper Meal (Rice and Gravy) Sample Code Mothers Gravy Contains no DCP (Control) 4.73 [+ or -] 0.71 Gravy contains 15% DCP by weight 4.71 [+ or -] 0.71 Gravy contains 20% DCP by weight 4.27 [+ or -] 1.07 Gravy contains 25% DCP by weight 4.25 [+ or -] 1.21 Sample Code Children Gravy Contains no DCP (Control) 4.86 [+ or -] 0.35 Gravy contains 15% DCP by weight 4.78 [+ or -] 0.54 Gravy contains 20% DCP by weight 4.76 [+ or -] 0.65 Gravy contains 25% DCP by weight 4.82 [+ or -] 0.52 Each product was rated on a 5-point scale (dislike very much ; dislike moderately ; neither like nor dislike ; like moderately ; like very much])
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|Author:||Anderson, Alex K.; Bediako-Amoa, B.; Steiner-Asiedu, M.|
|Publication:||African Journal of Food, Agriculture, Nutrition and Development|
|Date:||Apr 1, 2014|
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