Tanzania Food and Nutrition Center

Dar es Salaam, Tanzania

Tanzania Food and Nutrition Center

Dar es Salaam, Tanzania
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Amaza P.S.,University of Jos | Abass A.B.,International Institute Of Tropical Agriculture | Bachwenkiz B.,International Institute Of Tropical Agriculture | Towo E.E.,Tanzania Food and Nutrition Center
Tropicultura | Year: 2016

In this study, the factors influencing the adoption of mechanized technologies for processing cassava into a value-added high quality cassava flour (HQCF) by rural households in Tanzania were examined. A structured questionnaire was used to collect data from 400 households in villages which carry out both mechanized and non-mechanized cassava processing activities. The questionnaire focused on the households' socio-economic characteristics and their adoption parameters. Data were analysed using descriptive statistics and the double-hurdle model. The study revealed a positive correlation between the level of awareness of mechanized cassava processing technologies and their rate of adoption. In addition, the adoption decisions made by the households were significantly influenced by a number of factors, such as the gender of the processors, the distance of the processing sites to the nearest tarmac road, and the cost of capital required to invest in HQCF processing technology. The amount invested by households in the processing of HQCF was influenced by the number of adult females in the household, the education level of the processors, farming experience and the distance from the processing plant to the nearest product market. This suggests that mechanized post-harvest processing of HQCF at the household level was influenced by access to product market. Therefore, the study recommends increased promotion of postharvest processing technologies, access to capital and enhanced infrastructures, especially rural roads to facilitate improved access to markets for HQCF in Tanzania.

Hoffman S.J.,McMaster University | Hoffman S.J.,University of Toronto | Hoffman S.J.,Harvard University | Guindon G.E.,University of Waterloo | And 6 more authors.
Malaria Journal | Year: 2011

Background: Research evidence is not always being disseminated to healthcare providers who need it to inform their clinical practice. This can result in the provision of ineffective services and an inefficient use of resources, the implications of which might be felt particularly acutely in low- and middle-income countries. Malaria prevention is a particularly compelling domain to study evidence/practice gaps given the proven efficacy, cost-effectiveness and disappointing utilization of insecticide-treated nets (ITNs). Methods. This study compares what is known about ITNs to the related knowledge and practices of healthcare providers in four low- and middle-income countries. A new questionnaire was developed, pilot tested, translated and administered to 497 healthcare providers in Ghana (140), Laos (136), Senegal (100) and Tanzania (121). Ten questions tested participants' knowledge and clinical practice related to malaria prevention. Additional questions addressed their individual characteristics, working context and research-related activities. Ordinal logistic regressions with knowledge and practices as the dependent variable were conducted in addition to descriptive statistics. Results: The survey achieved a 75% response rate (372/497) across Ghana (107/140), Laos (136/136), Senegal (51/100) and Tanzania (78/121). Few participating healthcare providers correctly answered all five knowledge questions about ITNs (13%) or self-reported performing all five clinical practices according to established evidence (2%). Statistically significant factors associated with higher knowledge within each country included: 1) training in acquiring systematic reviews through the Cochrane Library (OR 2.48, 95% CI 1.30-4.73); and 2) ability to read and write English well or very well (OR 1.69, 95% CI 1.05-2.70). Statistically significant factors associated with better clinical practices within each country include: 1) reading scientific journals from their own country (OR 1.67, 95% CI 1.10-2.54); 2) working with researchers to improve their clinical practice or quality of working life (OR 1.44, 95% CI 1.04-1.98); 3) training on malaria prevention since their last degree (OR 1.68, 95% CI 1.17-2.39); and 4) easy access to the internet (OR 1.52, 95% CI 1.08-2.14). Conclusions: Improving healthcare providers' knowledge and practices is an untapped opportunity for expanding ITN utilization and preventing malaria. This study points to several strategies that may help bridge the gap between what is known from research evidence and the knowledge and practices of healthcare providers. Training on acquiring systematic reviews and facilitating internet access may be particularly helpful. © 2011 Hoffman et al; licensee BioMed Central Ltd.

Cameron D.,McMaster University | Lavis J.N.,McMaster University | Lavis J.N.,McMaster Health Forum | Guindon G.E.,McMaster University | And 5 more authors.
Health Research Policy and Systems | Year: 2010

Background: A questionnaire could assist researchers, policymakers, and healthcare providers to describe and monitor changes in efforts to bridge the gaps among research, policy and practice. No questionnaire focused on researchers' engagement in bridging activities related to high-priority topics (or the potential correlates of their engagement) has been developed and tested in a range of low- and middle-income countries (LMICs).Methods: Country teams from ten LMICs (China, Ghana, India, Iran, Kazakhstan, Laos, Mexico, Pakistan, Senegal, and Tanzania) participated in the development and testing of a questionnaire. To assess reliability we calculated the internal consistency of items within each of the ten conceptual domains related to bridging activities (specifically Cronbach's alpha). To assess face and content validity we convened several teleconferences and a workshop. To assess construct validity we calculated the correlation between scales and counts (i.e., criterion measures) for the three countries that employed both and we calculated the correlation between different but theoretically related (i.e., convergent) measures for all countries.Results: Internal consistency (Cronbach's alpha) for sets of related items was very high, ranging from 0.89 (0.86-0.91) to 0.96 (0.95-0.97), suggesting some item redundancy. Both face and content validity were determined to be high. Assessments of construct validity using criterion-related measures showed statistically significant associations for related measures (with gammas ranging from 0.36 to 0.73). Assessments using convergent measures also showed significant associations (with gammas ranging from 0.30 to 0.50).Conclusions: While no direct comparison can be made to a comparable questionnaire, our findings do suggest a number of strengths of the questionnaire but also the need to reduce item redundancy and to test its capacity to monitor changes over time. © 2010 Cameron et al; licensee BioMed Central Ltd.

Talley L.,National Center for Environmental Health | Woodruff B.A.,Emory University | Seal A.,University College London | Tripp K.,Centers for Disease Control and Prevention | And 4 more authors.
Public Health Nutrition | Year: 2010

Objective: To evaluate the effectiveness of stainless steel (Fe alloy) cooking pots in reducing Fe-deficiency anaemia in food aid-dependent populations.Design Repeated cross-sectional surveys. Between December 2001 and January 2003, three surveys among children aged 6-59 months and their mothers were conducted in 110 households randomly selected from each camp. The primary outcomes were changes in Hb concentration and Fe status.Setting Two long-term refugee camps in western Tanzania.Subjects Children (6-59 months) and their mothers were surveyed at 0, 6 and 12 months post-intervention. Stainless steel pots were distributed to all households in Nduta camp (intervention); households in Mtendeli camp (control) continued to cook with aluminium or clay pots.Results: Among children, there was no change in Hb concentration at 1 year; however, Fe status was lower in the intervention camp than the control camp (serum transferrin receptor (sTfR) concentration: 6.8 v. 5.9 μg/ml; P < 0.001). There was no change in Hb concentration among non-pregnant mothers at 1 year. Subjects in the intervention camp had lower Fe status than those in the control camp (sTfR concentration: 5.8 v. 4.7 μg/ml; P = 0.003).Conclusions: Distribution of stainless steel pots did not increase Hb concentration or improve Fe status in children or their mothers. The use of stainless steel prevents rusting but may not provide sufficient amounts of Fe and strong educational campaigns may be required to maximize use. The distribution of stainless steel pots in refugee contexts is not recommended as a strategy to control Fe deficiency.

Tripp K.,Centers for Disease Control and Prevention | MacKeith N.,University College London | Woodruff B.A.,Centers for Disease Control and Prevention | Talley L.,Centers for Disease Control and Prevention | And 5 more authors.
Public Health Nutrition | Year: 2010

Objective: To evaluate the acceptability of iron and iron-alloy cooking pots prior to an intervention trial and to investigate factors affecting retention and use.Design Pre-trial research was conducted on five types of iron and iron-alloy pots using focus group discussions and a laboratory evaluation of Fe transfer during cooking was undertaken. Usage and retention during the subsequent intervention trial were investigated using focus group discussions and market monitoring.Setting Three refugee camps in western Tanzania.Subjects Refugee health workers were selected for pre-trial research. Mothers of children aged 6-59 months participated in the investigation of retention and use.Results: Pre-trial research indicated that the stainless steel pot would be the only acceptable type for use in this population due to excessive rusting and/or the high weight of other types. Cooking three typical refugee dishes in stainless steel pots led to an increase in Fe content of 3.2 to 17.1 mg/100 g food (P < 0.001). During the trial, the acceptability of the stainless steel pots was lower than expected owing to difficulties with using, cleaning and their utility for other purposes. Households also continued to use their pre-existing pots, and stainless steel pots were sold to increase household income.Conclusions: Pre-trial research led to the selection of a stainless steel pot that met basic acceptability criteria. The relatively low usage reported during the trial highlights the limitations of using high-value iron-alloy cooking pots as an intervention in populations where poverty and the availability of other pots may lead to selling.

Nyhus Dhillon C.,Helen Keller International Tanzania | Subramaniam H.,Helen Keller International Tanzania | Mulokozi G.,Tanzania Food and Nutrition Center | Rambeloson Z.,A2Z The USAID Micronutrient and Child Blindness Project | Klemm R.,Johns Hopkins University
PLoS ONE | Year: 2013

Background: Tanzania has conducted a national twice-yearly Vitamin A supplementation (VAS) campaign since 2001. Administrative coverage rates based on tally sheets consistently report >90% coverage; however the accuracy of these rates are uncertain due to potential errors in tally sheets and their aggregation, incomplete or inaccurate reporting from distribution sites, and underestimating the target population. Objectives: The post event coverage survey in Mainland Tanzania sought to validate tally-sheet based national coverage estimates of VAS and deworming for the June 2010 mass distribution round, and to characterize children missed by the national campaign. Methods: WHO/EPI randomized cross-sectional cluster sampling methodology was adapted for this study, using 30 clusters by 40 individuals (n = 1200), in addition to key informant interviews. Households with children 6-59 months of age were included in the study (12-59 months for deworming analysis). Chi-squared tests and logistic regression analysis were used to test differences between children reached and not reached by VAS. Data was collected within six weeks of the June 2010 round. Results: A total of 1203 children, 58 health workers, 30 village leaders and 45 community health workers were sampled. Preschool VAS coverage was 65% (95% CI: 62.7-68.1), approximately 30% lower than tally-sheet coverage estimates. Factors associated with not receiving VAS were urban residence [OR = 3.31; p = 0.01], caretakers who did not hear about the campaign [OR = 48.7; p<0.001], and Muslim households [OR<3.25; p<0.01]. There were no significant differences in VAS coverage by child sex or age, or maternal age or education. Conclusion: Coverage estimation for vitamin A supplementation programs is one of most powerful indicators of program success. National VAS coverage based on a tally-sheet system overestimated VAS coverage by ~30%. There is a need for representative population-based coverage surveys to complement and validate tally-sheet estimates. © 2013 Nyhus Dhillon et al.

Mlingi N.L.V.,Tanzania Food and Nutrition Center | Nkya S.,Tanzania Food and Nutrition Center | Tatala S.R.,Tanzania Food and Nutrition Center | Rashid S.,Red Cross | Bradbury J.H.,Australian National University
Food and Chemical Toxicology | Year: 2011

There have been four konzo outbreaks in Tanzania from 1985 to 2002/2003 with a total of 363 cases of konzo. Every outbreak of konzo resulted from large cyanogen intakes from bitter cassava during drought, which caused food shortages and led to people using short-cut methods of cassava processing. Rehabilitation of the 214 konzo subjects from the two most recent outbreaks of konzo in southern Tanzania was carried out by screening konzo subjects and included provision of crutches and wheel chairs. The wetting method was taught to 216 women activists from the konzo-prone villages, in the first large scale community based intervention to reduce cyanogen intake. Using cassava cyanide kits, the average total cyanide content was reduced by the wetting method about 4-fold, in agreement with previous studies. This model to help prevent konzo requires the widespread education of women activists to use the wetting method. © 2010 Elsevier Ltd.

Cordeiro L.S.,University of Massachusetts Amherst | Wilde P.E.,Tufts University | Semu H.,Tanzania Food and Nutrition Center | James Levinson F.,Tufts University
Journal of Nutrition | Year: 2012

Household food insecurity contributes to poor nutritional health, with negative consequences on growth and development during childhood. Although early childhood nutrition needs have received much attention, another important nutritional phase is adolescence. In a sample of 670 adolescents from Kilosa District, Tanzania, this study used 3 approaches to better understand the relationship between food insecurity and undernutrition. First, this study examined the associations between 3 commonly used measures of household food security and undernutrition among 670 adolescents from Kilosa District, Tanzania. The measures of household food security, energy adequacy per adult equivalent, dietary diversity score, and coping strategies index, were strongly correlated with each other and household assets (P < 0.05). Second, this study measured the nutritional status of adolescents in this district, finding a high prevalence of undernutrition (21% with BMI-for-age <5th percentile of the National Center for Health Statistics/WHO reference). Third, this study measured the association between the log odds of undernutrition (as the dependent variable) and each of the 3 measures of household food security. In separate models, household energy adequacy per adult equivalent and household dietary diversity score were inversely associated with undernutrition after adjusting for gender, age, puberty, and the interaction between age and puberty. By contrast, a greater use of coping strategies was not associated with undernutrition. Strategies focused on increasing household energy intake and improving dietary diversity among the most vulnerable households could improve the nutritional health of adolescents. © 2012 American Society for Nutrition.

Samuel Chipungahelo M.,Tanzania Food and Nutrition Center
Library Review | Year: 2015

Purpose-The purpose of this paper is to examine knowledge sharing on traditional vegetables for supporting food security among farmers and other communities in Kilosa district, Tanzania. Design/methodology/approach-A case study design was employed. Semi-structured questionnaires with both open-and closed-ended questions were used to collect quantitative data in three wards of Kilosa District in Tanzania. Interviews were used to collect qualitative data from three heads of farmer groups, and direct observation was used to validate findings obtained from questionnaires. Findings-The results showed that farmers used a socialisation approach to share indigenous knowledge about traditional vegetables on production, consumption and preservation. Research limitations/implications-The study necessitates a need to conduct regular studies on sharing knowledge of traditional vegetables among different communities for supporting food security. Practical implications-The paper provides a framework for agricultural development planners on how to improve the management of indigenous knowledge on traditional vegetables with scientific knowledge in local communities for improving food security in Tanzania. Social implications-The paper has an implication for improving knowledge-sharing strategies on traditional vegetables in supporting food security in Tanzania, and other parts of Africa and developed countries. There is a need for knowledge intermediaries to develop knowledge database on production, consumption and preservation of traditional vegetable to increase the dissemination of this knowledge and, hence, improve nutrition and food security. Originality/value-The paper provides appropriate knowledge-sharing strategies which are needed to improve sharing of indigenous knowledge about traditional vegetables in Tanzania and other developed and developing countries. © Emerald Group Publishing Limited.

PubMed | Muhimbili University of Health and Allied Sciences, Sokoine University of Agriculture, University of New South Wales, Tanzania Food and Nutrition Center and University of Western Sydney
Type: | Journal: BMC pediatrics | Year: 2015

Stunting is one of the main public health problems in Tanzania. It is caused mainly by malnutrition among children aged less than 5 years. Identifying the determinants of stunting and severe stunting among such children would help public health planners to reshape and redesign new interventions to reduce this health hazard. This study aimed to identify factors associated with stunting and severe stunting among children aged less than five years in Tanzania.The sample is made up of 7324 children aged 0-59 months, from the Tanzania Demographic and Health Surveys 2010. Analysis in this study was restricted to children who lived with the respondent (women aged 15-49 years). Stunting and severe stunting were examined against a set of individual-, household- and community-level factors using simple and multiple logistic regression analyses.The prevalence of stunting and severe stunting were 35.5% [95% Confidence interval (CI): 33.3-37.7] and 14.4% (95 % CI: 12.9-16.1) for children aged 0-23 months and 41.6% (95 % CI: 39.8-43.3) and 16.1% (95 % CI: 14.8-17.5) for children aged 0-59 months, respectively. Multivariable analyses showed that the most consistent significant risk factors for stunted and severely-stunted children aged 0-23 and 0-59 months were: mothers with no schooling, male children, babies perceived to be of small or average size at birth by their mothers and unsafe sources of drinking water [adjusted odds ratio (AOR) for stunted children aged 0-23 months=1.37; 95% CI: (1.07, 1.75)]; [AOR for severely stunted children aged 0-23 months=1.50; 95% CI: (1.05, 2.14)], [AOR for stunted children aged 0-59 months=1.42; 95% CI: (1.13, 1.79)] and [AOR for severely stunted children aged 0-59 months=1.26; 95% CI: (1.09, 1.46)].Community-based interventions are needed to reduce the occurrence of stunting and severe stunting in Tanzania. These interventions should target mothers with low levels of education, male children, small- or average-size babies and households with unsafe drinking water.

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