Clinical trial of home available, mixed diets versus a lactose-free, soy-protein formula for the dietary management of acute childhood diarrhea

Functional Foods for Management of Diarrhea and Malnutrition in Rats Emphasizing on Nucleotides Role

BACKGROUND

Diarrhea and malnutrition are major health problems in developing countries. Inflammation, high oxidative stress, poor nutritional status, and fatty liver were encountered during such diseases. Patents for diarrhea and malnutrition management (WO2007/130882A2, WO00/37106A1, WO2014/152420, and CA2987364A1) were published.

OBJECTIVE

The objective was to introduce anti-diarrhea functional foods with a preventive effect on malnutrition.

METHODS

Two processing techniques were applied for preparing functional foods (formula 1 ingredients were made into cookies followed by grinding; formula 2 ingredients were pre-cooked, dried, and mixed in powder form) that were evaluated in a rat model of diarrhea with malnutrition (DM). Formula 2 was also assessed when mixed with nucleotides. The ingredients were edible plants that possess an anti-diarrheal effect with high protein sources (legumes and casein).

RESULTS

Induction of diarrhea with malnutrition, high oxidative stress, inflammation, accumulation of liver fat, and histopathological changes were demonstrated in DM control compared to normal control. The functional foods produced variable improvement in growth curves, food efficiency ratio, hemoglobin, hematocrit and plasma zinc, protein, albumin, globulin, lipase activity, and MDA. Formula 1 was superior in improving intestinal histopathology while formula 2 was more efficient in elevating plasma iron. Formula 2 with nucleotides was the best in improving growth curves, alkaline phosphatase, and reducing liver fat. Intestinal mucosa reduced glutathione and nitrite showed an efficient significant reduction on treatment with formula 2 with or without nucleotides. The formulas showed an anti-diarrheal effect by improving feces weight and moisture content.

CONCLUSION

Studied functional foods showed an anti-diarrheal effect and malnutrition improvement with different degrees.

Soy-Based Therapeutic Baby Formulas: Testable Hypotheses Regarding the Pros and Cons

Soy-based infant formulas have been consumed in the United States since 1909, and currently constitute a significant portion of the infant formula market. There are efforts underway to generate genetically modified soybeans that produce therapeutic agents of interest with the intent to deliver those agents in a soy-based infant formula platform. The threefold purpose of this review article is to first discuss the pros and cons of soy-based infant formulas, then present testable hypotheses to discern the suitability of a soy platform for drug delivery in babies, and finally start a discussion to inform public policy on this important area of infant nutrition.

Lactose avoidance for young children with acute diarrhoea

BACKGROUND

Young children with acute diarrhoea, typically due to infectious gastroenteritis, may temporarily stop producing lactase, the intestinal enzyme that digests lactose. This means they may not digest lactose, the main sugar in milk, and this may worsen or prolong the diarrhoeal illness. However, there is uncertainty whether avoiding lactose-containing milk or milk products helps young children recover from acute diarrhoea more quickly.

OBJECTIVES

To assess if avoiding or reducing intake of lactose-containing milk or milk products shortens the duration and severity of illness in young children with acute diarrhoea. We also sought other indicators of morbidity and overall mortality.

SEARCH METHODS

We searched the Cochrane Infectious Diseases Group Specialized Register (14 May 2013), Cochrane Central Register of Controlled Trials (CENTRAL) published in The Cochrane Library (Issue 4, 2013), MEDLINE (1996 to 14 May 2013), EMBASE (1974 to 14 May 2013), and LILACS (1982 to 14 May 2013), and the reference lists of potentially relevant trials, key conference proceedings, and wrote to individuals and organizations in the field.

SELECTION CRITERIA

Randomized or quasi-randomized controlled trials that assessed the effects of avoiding or reducing exposure to lactose in young children under five years with acute diarrhoea.

DATA COLLECTION AND ANALYSIS

We extracted data using the standard methods of the Cochrane Infectious Diseases Group, and two review authors independently evaluated trial quality and data extraction. Continuous outcomes were compared using mean difference (MD), and dichotomous outcomes using the risk ratio (RR). We presented all results with 95% confidence intervals (CI) and assessed the quality of evidence using the GRADE approach.

MAIN RESULTS

We included 33 trials enrolling 2973 children with acute diarrhoea. Twenty-nine trials were exclusively conducted on inpatients, all from high- or middle-income countries. Fifteen trials included children aged below 12 months, and 22 excluded children who were being breast-fed.Compared to lactose-containing milk, milk products, or foodstuffs, lactose-free products may reduce the duration of diarrhoea by an average of about 18 hours (MD -17.77, 95% CI -25.32 to -10.21, 16 trials, 1467 participants, low quality evidence). Lactose-free products probably also reduce treatment failure (defined variously as continued or worsening diarrhoea or vomiting, the need for additional rehydration therapy, or continuing weight loss) by around a half (RR 0.52, 95% CI 0.39 to 0.68, 18 trials, 1470 participants, moderate quality evidence).Diluted lactose-containing milk has not been shown to reduce the duration of diarrhoea compared to undiluted milk or milk products (five trials, 417 participants, low quality evidence), but may reduce the risk of treatment failure (RR 0.65, 95% CI 0.45 to 0.94, nine trials, 687 participants, low quality evidence).

AUTHORS' CONCLUSIONS

In young children with acute diarrhoea who are not predominantly breast-fed, change to a lactose-free diet may result in earlier resolution of acute diarrhoea and reduce treatment failure. Diluting lactose-containing formulas may also have some benefits but further trials are required to have confidence in this finding. There are no trials from low-income countries, where mortality for diarrhoea is high, and malnutrition is more common.

Dietary management of childhood diarrhea in low- and middle-income countries: a systematic review

Background

Current WHO guidelines on the management and treatment of diarrhea in children strongly recommend continued feeding alongside the administration of oral rehydration solution and zinc therapy, but there remains some debate regarding the optimal diet or dietary ingredients for feeding children with diarrhea.

Methods

We conducted a systematic search for all published randomized controlled trials evaluating food-based interventions among children under five years old with diarrhea in low- and middle-income countries. We classified 29 eligible studies into one or more comparisons: reduced versus regular lactose liquid feeds, lactose-free versus lactose-containing liquid feeds, lactose-free liquid feeds versus lactose-containing mixed diets, and commercial/specialized ingredients versus home-available ingredients. We used all available outcome data to conduct random-effects meta-analyses to estimate the average effect of each intervention on diarrhea duration, stool output, weight gain and treatment failure risk for studies on acute and persistent diarrhea separately.

Results

Evidence of low-to-moderate quality suggests that among children with acute diarrhea, diluting or fermenting lactose-containing liquid feeds does not affect any outcome when compared with an ordinary lactose-containing liquid feeds. In contrast, moderate quality evidence suggests that lactose-free liquid feeds reduce duration and the risk of treatment failure compared to lactose-containing liquid feeds in acute diarrhea. Only limited evidence of low quality was available to assess either of these two approaches in persistent diarrhea, or to assess lactose-free liquid feeds compared to lactose-containing mixed diets in either acute or persistent diarrhea. For commercially prepared or specialized ingredients compared to home-available ingredients, we found low-to-moderate quality evidence of no effect on any outcome in either acute or persistent diarrhea, though when we restricted these analyses to studies where both intervention and control diets were lactose-free, weight gain in children with acute diarrhea was shown to be greater among those fed with a home-available diet.

Conclusions

Among children in low- and middle-income countries, where the dual burden of diarrhea and malnutrition is greatest and where access to proprietary formulas and specialized ingredients is limited, the use of locally available age-appropriate foods should be promoted for the majority of acute diarrhea cases. Lactose intolerance is an important complication in some cases, but even among those children for whom lactose avoidance may be necessary, nutritionally complete diets comprised of locally available ingredients can be used at least as effectively as commercial preparations or specialized ingredients. These same conclusions may also apply to the dietary management of children with persistent diarrhea, but the evidence remains limited.

Lack of effect of nucleotide-supplemented infant formula on the management of acute diarrhea in infants

Nucleotides have been identified as conditionally essential nutrients. As prevention studies, conducted with nucleotide-supplemented formula, have shown statistically significant decrease in the risk of diarrhea, we tested the hypothesis that the consumption of nucleotide-supplemented formula during an acute diarrhea episode is associated with therapeutic effects in the treatment of infants with acute diarrhea and dehydration. A randomized, double-blind, controlled clinical trial was conducted in which patients were randomly assigned to 1 of 2 treatment groups. The "test" group consumed a nucleotide-supplemented infant formula and the "control" group consumed a nonsupplemented formula. Infants were accommodated in a metabolic unit where body weight, and all intakes and outputs were recorded at 24-hour intervals during hospitalization. Laboratory parameters including blood gases and electrolytes were monitored during hospitalization. Eighty-one male infants ranging in age from older than 1 month and younger than 1 year, with acute non-cholera diarrhea and dehydration were studied. Primary outcomes were stool output and duration of diarrhea and did not differ significantly between the groups, with a stool output of 304.2 (SD 254.0) vs 350.3 (SD 269.1) g/kg and a duration of diarrhea of 83.3 (SD 44.5) vs 88.8 (SD 46.6) for the test and control groups, respectively. Anemia was highly prevalent and breast-feeding practice was not frequent in both groups. The average energy intake and weight gain were similar in the 2 groups. This study demonstrated that nucleotide supplementation of infant formula during episodes of acute diarrhea has no therapeutic advantage compared to conventional infant formula.

Testing strategies to reduce diarrhea in persons with HIV using traditional Chinese medicine: acupuncture and moxibustion

Diarrhea affects more than 60% of persons living with HIV/AIDS. Diarrhea can be caused by pathogens, neoplastic diseases, side effects of medications, malabsorption, and/or enteropathy. Activities of daily living and quality of life are often affected by HIV/AIDS-related diarrhea. Traditional Chinese medical interventions such as acupuncture and moxibustion show promise in the area of gastrointestinal symptom management. The purposes of this study were to (a) determine the influence of acupuncture and moxibustion in reducing the frequency of diarrhea and increasing stool consistency in HIV-infected men with chronic diarrhea (defined as three or more episodes of watery, liquid, or loose stools in a 24-hour period for 3 weeks or more), (b) ascertain the feasibility of the methodology for a future prospective randomized controlled trial, and (c) determine sample size estimate for a prospective randomized controlled trial. Using a time-series design, 15 HIV-positive men with chronic diarrhea received the same acupuncture/moxibustion treatment for six sessions over a 3-week period. Each participant maintained a daily stool frequency/consistency and medication diary. All treatments were administered by a licensed acupuncturist trained in traditional Chinese medicine. Based on the intent to treat analysis comparing the change in stool frequency from baseline (Week 1) to Week 3 and Week 4, stool frequency reduced approximately one episode per day (Week 3: p < .001; Week 4: p < .005). Stool consistency also improved, from baseline to Week 3 and Week 4, by more than 1 point on Hansen's stool consistency scale. Acupuncture and moxibustion are promising modalities for the symptom management of chronic diarrhea in HIV/AIDS. The results of this pilot study also establish the feasibility of a larger study and provide the empirical basis to serve as preliminary data from which to estimate statistical power and sample size for a larger efficacy study, inclusive of women as well as men.

Milk formulas in acute gastroenteritis and malnutrition: a randomized trial

OBJECTIVE

To compare three low-lactose milk formulas differing in osmolality and degree of protein hydrolysis in the treatment of diarrhoea and malnutrition in subjects with high rates of lactose intolerance, osmotic diarrhoea and a tropical/environmental enteropathy.

METHODS

A randomized double-blind trial of 180 Aboriginal children under 3 years of age admitted with acute diarrhoea and/or malnutrition was carried out. The intervention milk formulas were: (i) De-Lact, a low-osmolality lactose-free formula; (ii) O-Lac, a lactose-free formula; and (iii) Alfaré, a partially hydrolysed formula. Outcome measures were diarrhoeal severity, weight gain, formula palatability and changes in intestinal permeability (L/R ratios).

RESULTS

The duration of diarrhoea in days (mean; 95% confidence interval) was significantly longer on Alfaré (8.5; 7.0-10.0) compared to De-Lact (6.1; 5.0-7.2) and O-Lac (6.9; 5.6-8.1; P = 0.04). There were no differences in mean intake between formulas, but palatability of Alfaré was significantly worse (P < 0.01) than the other formulas. Over the trial 5 days, improvement in L/R ratios was significantly greater (P = 0.05) for De-Lact (18.6; 10.6-26.6) than for Alfaré (8.5; 2.1-14.9). Weight gain was not significantly different between the three formulas, except in a malnourished subgroup who had better weight gain on De-Lact (P = 0.05).

CONCLUSIONS

In these Aboriginal children with diarrhoea and growth failure, a low osmolality milk was associated with better outcomes and a partially hydrolysed formula with less improvement in mucosal recovery, suggesting that cow's milk protein intolerance is not contributing to greater diarrhoeal severity or enteropathy in Aboriginal children.

Implementing an evidence-based acute gastroenteritis guideline at a children's hospital

BACKGROUND

Guidelines for preventing and treating acute gastroenteritis (AGE) have generally not been incorporated into medical practice. An evidence-based clinical practice guideline was adapted from national guidelines to meet the practice styles characterizing care in southwestern Ohio and implemented at the Children's Hospital Medical Center (Cincinnati). Its efficacy was assessed in terms of emergency department (ED) encounters and admissions, mean and total hospital costs, and mean length of hospitalization.

METHODS

Comparisons were made between patients seen during peak gastroenteritis months (December-May) before (fiscal year [FYs] 1994-1997) and after (FYs 1998 and 1999) guideline implementation. Data were extracted from hospital charts, clinical databases, and billing records.

RESULTS

Following implementation, mean yearly ED encounters for AGE decreased 22% and mean yearly admissions decreased 33%. The percentage of admitted children with minor illness decreased (p = 0.002). Mean length of stay decreased 21% for children with minor illness (p = 0.0001) and 5% for others. Hydration status was noted in only 15% of ED charts examined but increased to 63% in FY 1998 and 86% in FY 1999 (p < 0.001). The proportion of admitted patients who advanced to a regular diet by discharge increased from 4.9% (FY 1997) to 23% (FY 1998) and 76% (FY 1999; p < 0.0001). Total inpatient days/year decreased by 43%. Mean hospital costs did not change significantly.

DISCUSSION

Following implementation, fewer patients with AGE were seen in the ED and fewer were admitted to the hospital for care. Hospital stays were shorter, and children were more likely to resume their diets before discharge.

Randomised trial of different rates of feeding in acute diarrhoea

OBJECTIVE

To compare the effect of different feeding frequencies on the speed of recovery from diarrhoea.

METHODS

A randomised, non-blinded trial provided 0.452 MJ/kg/day as either 6 or 12 feeds of cows' milk each day to 262 hospitalised male infants aged 3-12 months with acute diarrhoea. Stool frequency, stool weight, body weight, and diarrhoea complications were monitored until recovery or for 14 days.

RESULTS

A proportional hazards regression model controlling for age, diarrhoea aetiology, and severity of dehydration on admission revealed that the frequently fed group had a significantly shorter duration of diarrhoea (hazards ratio, 1.29; 95% confidence interval, 1.002 to 1.653). Frequently fed infants had a significantly greater weight gain and significantly lower faecal frequency and faecal weight.

CONCLUSIONS

Breast feeding remains the preferred method of feeding infants with acute diarrhoea, but feeding cows' milk to adequately nourished infants with acute diarrhoea is safe and is more rapidly effective if provided in frequent feeds with low energy loads.

Nutritional effects and management of diarrhoea in infancy

The interactions between diarrhoeal disease and nutritional status are complex and synergistic. These are serious issues globally because they affect hundreds of millions of young children and annually cause > 3 million deaths in children aged under 5 y. Despite intensive field-based and laboratory studies over three decades, many questions remain unanswered about the causes, pathophysiology and best approaches to management and prevention of this "diarrhoea-malnutrition" syndrome. Oral rehydration therapy (ORT) has been a major advance and has saved many lives from acute diarrhoea. However, persistent diarrhoea is now a major problem and is very significant because of its strong negative impacts on nutritional status and because persistent diarrhoea and dysentery are now major causes of infant and young child deaths. ORT provides clear and practical methods for replacement of fluid and electrolyte losses during diarrhoea. Rehydration salts can be made available as (i) a simple, easy-to-use package, complete with user instructions; (ii) cereal-based formulae based on widely available ingredients that can be prepared domestically or commercially; and (iii) home-made mixtures of sugar and salt which should be simple to prepare but are risky because of inadequate understanding about their preparation at home and the chance of mixing the ingredients inaccurately and giving them wrongly. Continuation and encouragement of breastfeeding is an important strategy to prevent and control diarrhoea and as part of its management. Early refeeding during diarrhoea is another important principle to help to reduce its duration, severity and its nutritional impacts. Supplementation with specific dietary ingredients, such as vitamin A, zinc and folate, is rather contentious and drug therapy is of little value unless specifically indicated. Some patients may require enteral nutrition or parenteral nutrition but these require specialized equipment and skills that are usually beyond the reach of developing countries and infants and children who live in remote areas.

Acute gastroenteritis

Acute gastroenteritis represents a frequent cause of morbidity and mortality among children in the developing world as well as morbidity in the developed world. Despite the large number of potential etiologic agents, management of gastroenteritis is uniform and aimed to prevent the two major complications, dehydration and malnutrition. Current guidelines emphasize the use of oral rehydration and the early reintroduction of age-appropriate foods. These guidelines are reviewed here, the underlying principles discussed, and practical points provided.

Dietary management of acute diarrhea with local foods in a Guatemalan rural community

A community-based, randomized trial was conducted to evaluate a locally available diet for the management of acute diarrhea (n = 99 episodes) in 90 Guatemalan children, 4-42 months of age. The Test Diet (TD), a combination of a semi-solid pap (maize flour, black beans, oil) and a liquid gruel, Incaparina (maize flour, cotton seed flour, sugar), in addition to breast-milk and other home foods (group TD, n = 45 episodes) was offered for 14 d and compared to usual home feeding (group HF, n = 54 episodes). Diarrhea episodes after admission were significantly shorter for group TD (median 2.0 d) than group HF (median 4.4 d, p = 0.003) after adjusting for potential confounders. Weight gains did not differ significantly between groups. We conclude that community-based dietary management of acute childhood diarrhea using energy-dense, locally available foods is feasible and may shorten diarrhea duration. This may encourage mothers to follow recommendations for continued feeding during diarrhea in developing country environments.

Use of soy fiber in acute diarrhea in infants and toddlers

Soy fiber has been shown to reduce the duration of watery stools during acute diarrhea caused by bacterial and viral pathogens in underdeveloped countries. A randomized blinded clinical trial was conducted with middle-class American children to assess the efficacy of soy fiber-supplemented infant formula. Stool characteristics, intake, and weight were recorded. Infants > 6 months of age (n = 44) fed soy fiber-supplemented formula (Isomil DF) had a significantly shorter estimated median duration of diarrhea (9.7 hours vs. 23.1 hours) than those fed soy formula (Isomil). The use of fiber-supplemented soy formula may reduce the duration of diarrheal symptoms in U.S. infants more than 6 months of age with acute diarrhea.

Amylase-Treated Rice Flour Oral Rehydration Solution with Enhanced Energy Density. Ii. in Vivo Studies of Tolerance, Energy Intake, and Rehydration Efficacy in the Initial Treatment of Dehydrated Diarrhoeic Children

In a companion paper we described the feasibility of liquefying high concentrations of rice flour with amylase to produce enhanced oral rehydration solutions (ORS) with suitably lower viscosities to remain drinkable. This offers a means of orally rehydrating patients, while eliminating much or all of the caloric deficit imposed by conventional, dilute, glucose-based ORS. To explore whether humans would tolerate these solutions, 63 dehydrated diarrhoeic children were randomly assigned to one of three four-hour oral treatments: ORS with 5% rice flour, 10% rice flour incubated with -amylase, or 15% rice flour incubated with -amylase. The sodium and potassium concentrations of the solution as well as the osmolality and viscosity were within the desired ranges. On average, the children consumed 70 ± 26%, 90 ± 28%, and 80 ± 45% of the respective ORS, equivalent to intakes of 8 ± 4, 23 ± 9, and 33 ± 18 kcal/kg/4 hours, respectively. The mean increases in weight in four hours were 1.1%, 2.7%, and 1.6%, respectively. The concept of enhanced energy content of ORS based on amylasetreated rice flour appears to be ready for exploration in clinical field trials.

Evaluation of a maize-cowpea-palm oil diet for the dietary management of Nigerian children with acute, watery diarrhea

A randomized clinical trial was carried out to compare a locally available maize-cowpea-palm oil diet (group MCP) with a commercially produced lactose-free, soy protein isolate formula (group SF) for the dietary management of 69 Nigerian boys, 6-24 months of age, hospitalized for acute, watery diarrhea. Although the treatment groups were generally similar initially, the children in group SF had slightly lower mean weight-for-age z scores (p = 0.08), lower serum bicarbonate levels (p = 0.04) and greater stool outputs during the period of rehydration before the diets were initiated (p = 0.01). Rates of treatment failure in group MCP (5.7%) and group SF (8.8%) were similar (p = 0.67). There were no significant differences in the adjusted mean stool outputs by study group on days 1-5, but the children in group SF had slightly lower fecal weights on day 6 (p = 0.05). Children in group MCP had a substantially reduced duration of liquid stool excretion (estimated median duration 42 h versus 140 h; p < 0.001). On the other hand, children in group SF consumed considerably more of their diet, had greater net absorption of macronutrients and greater rates of weight gain than those in group MCP. We conclude that children can safely consume the MCP diet during acute, watery diarrhea without increasing their risk of treatment failure or augmenting stool output. However, the diet may not be adequate as a sole source of nutrients beyond the period of acute illness.

Rehydration and nutritional management

Diarrhoea remains a leading worldwide cause of morbidity and mortality. In developing countries alone, 1.5 billion episodes of diarrhoea occur per year in children under 5 years of age and approximately 4,000,000 of these result in death. Early, appropriate therapy decreases the risk of complications and death due to diarrhoea. Regardless of the causative agent, oral rehydration and nutritional management are the mainstays of good management of infants, children and adults with diarrhoea. Diarrhoeal disease control programmes throughout the developing world have adopted the WHO case management plan as a standard. In this chapter, we review the history, successes and shortcomings of various oral rehydration therapies and recommend a case management approach that is similar to the WHO plan. Although ORT is safe, effective, convenient and economical, this therapy has not been universally implemented in health care settings. The challenge for clinical and public health practitioners in developing and developed countries is to identify and overcome the barriers that exist so that all patients with diarrhoea will have the opportunity to receive optimal care.

Feeding during acute diarrhea as a risk factor for persistent diarrhea

Dietary intake during diarrhea in children less than three years of age was estimated from information recorded on illustrated dietary forms used by children's caretakers during the first week of illness in a prospective community-based study of diarrheal diseases in Lima, Peru. The frequency of consumption and the amount consumed of food groups and selected commonly consumed foods were analyzed by the final duration of the diarrheal episode. Cereals were less frequently consumed during the acute phase of diarrheal episodes that ultimately became persistent (> 14 days' duration), apparently shortening the duration of the episode by one day (median duration of four days in children not consuming vs three days in children consuming cereals during diarrhea, p < 0.02 Kaplan-Meier log-rank test). Only roots and tubers (mainly potatoes) were consumed in greater quantity during episodes that became persistent. There was no evidence that consumption of breast milk or non-maternal milk was associated with an alteration in diarrheal duration. This study provides further evidence of the beneficial effects of continuing feeding during diarrhea using foods available at the home level, especially cereals, which are commonly used in the diet of young children.