Complementary feeding is essential if children are to grow and develop properly. Adequate complementary feeding entails feeding children aged between 6 and 23 months with foods from four or more food groups at least twice a day
(WHO, 2014; WHO, 2007). It is the process starting when breast milk alone is no longer sufficient to meet the nutritional requirements of infants. Complementary foods play vital role for children growth and development and complements for both nutritional and developmental needs of the infant when breast milk alone is no longer sufficient
(Temesgen, 2013).
The early year period also reflects a time of high vulnerability of the child to various adverse health outcomes such as diarrhoea
(Chan et al., 2017). Complementary foods prepared under unhygienic conditions are frequently heavily contaminated with pathogens and may thus be a major factor in causing diarrhoea diseases and associated malnutrition
(Oluwafemi and Ibeh, 2011).
Global perspective on burden of diarrhea
Diarrhoeal disease (DD) is considered a public health problem with high morbidity and mortality worldwide
(Wardlaw et al., 2010). It is one of the leading causes of morbidity and mortality, especially among children under the age of five years. Globally, there are nearly 1.7 billion cases of childhood diarrhoeal disease and estimated 525000 deaths occur each year among children under five years of age
(WHO, 2018). According to statistics by
World Health Organization (2013), children under three years of age in developing countries experience on average about three episodes of diarrhea every year. As a result diarrhea is a major cause of malnutrition and the most severe threat posed by diarrhea is dehydration. Death can follow severe dehydration if the lost body fluids and electrolytes are not replenished. Fig 1 shows the regional burden of diarrhea among children aged 0-4 Years.
These diseases are a major cause of hospitalization and child’s death globally. Together they account for approximately one in six deaths among children younger than five year’s
(WHO, 2009).
Indian perspective on burden of diarrhea
In India, like other developing countries, diarrhoeal diseases are important child health problem. National Family Health Survey 2015-16 (NFHS-4) conducted using a two week recall period revealed that a diarrhea prevalence among under five children 9.6% in rural and 8.2% in urban areas, with a average rate of 9.2%.
(IIPS, 2015-16). Diarrhoea is the passage of loose or watery stools occurring three or more times in a 24-hour period which means an increased frequency or decreased consistency of bowel movements and it affects people of all ages
(Mohamed Ali, 2016). It is usually a symptom of an infection in the intestinal tract, which can be caused by a variety of bacterial, viral and parasitic organisms
(Dawit et al., 2016).
Among children aged 1-4 years, acute watery diarrhoea accounted for 31-69% of diarrhoeal deaths, acute bloody diarrhoea for 12-28% and persistent diarrhoea for 12-56%
(Rahman, 2014). Major risk for diarrhoea includes environment contamination and increased exposure to enter pathogens. Additional risk include young age, malnutrition, lower socioeconomic status and lack of exclusive or predominant feeding
(Monica et al., 2012; Yilgwan and Okolo, 2012; Archna et al., 2012; Sachdev, 1991).
Contamination of complementary foods
Epidemiological data demonstrate that food is an important factor in transmitting pathogens that cause diarrheal illness
(Motarjemi et al., 2012). More than 120 important viral, bacterial and parasitic agents transmitted by food have been identified
(Motarjemi et al., 2014). While some pathogens can survive in the environment, the main reservoirs for these agents are domestic animals, household pests such as rats and mice and humans. When animals and their products are used as food, these agents may be present in or on the food. Pathogens are usually present on the surface of food due to direct or indirect contamination from the animal, pest, or human reservoir. In the case of many parasites and certain bacteria, such as Salmonella Enteriditis in eggs, the agent is present within the food. Many pathogens known to cause diarrhea are spread by the fecal-oral route.
Moreover, most of the child diarrhoeal cases could be due to foods and water that children consume in their homes as most foodborne transmission in developing countries takes place within the home
(Toure et al., 2011). While a wide range of pathogens can cause foodborne diseases, viruses, bacteria and parasites pose the greatest share of preventable foodborne threats
(Lee et al., 2014; Fischer-Walker et al., 2013). Food serves as a vehicle for virus and parasite transmission to a new host; however, for many bacteria, food offers an opportunity to grow exponentially to infectious levels. Some bacteria, such as
Staphylococcus aureus and
Bacillus cereus, will produce toxins while growing in food, resulting in foodborne intoxications or food poisoning. More than 120 important viral, bacterial and parasitic agents transmitted by food have been identified. Thirty-two of these are significant public health problems and more than half cause diarrhea, either alone or in combination with other adverse symptoms
(Motarjemi et al., 2013).
In rural and urban Bangladesh, 18 per cent of tested complementary food samples for children were contaminated with high levels of fecal coliforms (³100 CFU/g of food) and 29 per cent were positive for
E.
coli. A number of pathogenic
E.
coli strains, including enterotoxigenic, enteropathogenic and Shiga-toxin
E.
coli, also were detected in complementary food samples in Bangladesh
(Islam et al., 2012). The report also indicated that elevated aerobic plate counts were associated with the presence of
E.
coli in CF as well as with the frequency of feeding the same food for multiple meals over time
(Wolf et al., 2014).
Diarrhea can be caused by numerous pathogens and transmitted through multiple vehicles. Some of the most common pathogenic causes of severe and fatal diarrhea in young children globally are rotavirus and shigella. Rotavirus takes the lives of over 3,600 children under five years and accounts for approximately 40% of all deaths caused by diarrhea
(CIDRZ, 2013). Contaminated hands and cooking utensils contribute greatly to the contamination of weaning foods, especially among mothers who do not observe proper hygienic conditions
(Michaelsen et al., 2003).
Risk factors for the development of diarrhoea
Morbidity and illness in young children is particularly problematic because early childhood is a critical period in terms of development
(MacIntyre, 2014). Factors that are involved in the occurrence of diarrhoea in children are complex and the relative contribution of each factor varies as a function of interaction between socio-economic, environmental and behavioural variables
(Mengistie et al., 2013). The documented risk factors for diarrhoea include younger age, malnutrition, early weaning, seasonal patterns, low maternal education, lack of piped water supply, poor water-storage practices, lack of vigilant hand washing, poor sanitation and not treating water in the home
(George et al., 2014; Arvelo et al., 2010). The challenges during complementary feeding are context specific, but many are common across settings. They are often characterized by poor feeding practices and poor dietary quality of homemade complementary foods
(Krebs, 2011; Plessis et al., 2013).
The safe food handling practices was not followed appropriately during food preparation which resulted in higher levels of microbial contamination in their food produce
(Krishnasree et al., 2018). Diarrheal diseases are major causes of malnutrition, delayed physical development and early childhood mortality in developing countries and poor communities and the major cause of death in children with diarrhea is loss of water and essential minerals
(Dodicho, 2016).
Preventive strategies for diarrhoeal diseases
Contamination of food is a major cause of diarrhoeal diseases in both the developed and developing world. Foods which are nutritious should also be wholesome and safe to prevent infection. Food should therefore be prepared hygienically and safely
(Onyangore et al., 2015).
HACCP approach
Food contamination can be reduced using a Hazard Analysis and Critical Control Point (HACCP) methodology at the household level. This is a management system in which food safety is addressed through the analysis and control of biological, chemical and physical hazards from raw material production, procurement and handling, to manufacturing, distribution and consumption of the finished product
(Islam et al., 2013). Food should therefore be prepared hygienically and safely
(Onyangore et al., 2015).
In Bangladesh, 30 mothers were assigned to an intervention group and 30 to a control group. After identification of critical control points, three field workers trained mothers/caregivers in the intervention group for 4 weeks in key behaviors to prevent bacterial contamination of complementary food. Complementary food and water were tested for contamination with pathogenic microorganisms at baseline, after the 4-week training and 3 months after the intervention. The baseline results demonstrated substantial contamination of complementary food in the study population. The intervention, which involved mothers and caregivers applying the critical actions identified through the HACCP approach, significantly reduced fecal bacterial contamination in complementary food and water
(Islam et al., 2013). Toure et al., (2011, 2013) in Mali also determined the effectiveness of implementation of defined critical actions to reduce pathogenic contamination in complementary food. In 2011 researchers worked with 15 randomly selected mothers from a health center nutrition education group in a peri-urban area of Bamako to identify key problems and critical control points in the preparation of two common complementary foods. Trained field staff worked with the mothers over several days to adopt the critical actions to reduce pathogenic contamination. The results showed that the critical actions, when followed diligently, were successful in eliminating pathogens from the complementary food. In 2013 field workers worked with 30 mothers over a longer period of time, 9 months, to practice adopting the actions. Results demonstrated a statistically significant reduction in fecal coliform contamination of complementary food between the baseline study and immediately after the training and between baseline and 3 months after the training among mothers in the intervention group (p<0.008), while mothers in the control group had no reduction in fecal coliform contamination of complementary food during the same time period. These intervention studies that identify critical control points and key actions and test actions with potential users are important to ensure that identified actions, when practiced as intended, do eliminate or minimize bacterial contamination. If they do not, more observations may be necessary to see whether critical actions are implemented as intended or whether other critical actions need to be added to the recommended behaviors.
Water, sanitation and hygiene interventions
Acute diarrhea is one of the main problems affecting children under- five in the world, reducing their wellbeing and this leads to a considerable demand for health care services. There is a strong relationship between diarrhea, poverty and unhygienic environmental conditions
(Mohammed, 2013).
According to
WHO (2014) risk of diarrheal disease can be reduced by 28 per cent through improved sanitation, including sewer connections; reduced by 45 per cent through effective water treatment at the household level (such as boiling water or treating water with chlorine or other appropriate agents) and safe water storage and reduced by about 23 per cent through handwashing with soap. Household filters generally outperformed household chlorination and in each case, safe storage provided significant additional protection (on the order of an additional 12 to 15 per cent risk reduction)
(Wolf et al., 2014).
Keeping food free of fecal contamination is one of the key ways to prevent the fecal-oral transmission of disease
(Curtis et al., 2011). A Significant proportion of diarrhea can be prevented through safe drinking water, good sanitation and hygiene
(WHO, 2013). A central element of safe food preparation is handwashing, but this is not the only component requiring improvement for weaning food hygiene
(Islam et al., 2013; Toure et al., 2013). Handwashing before food preparation and/or child feeding is a frequently missed opportunity for habituating hygienic behaviors
(Halder et al., 2010; Nizame et al., 2013) and reducing childhood diarrhea. Handwashing with water before food preparation was associated with reduced risk of diarrhea among Bangladeshi children
(Luby et al., 2006). Handwashing with soap can reduce diarrhea around 23 per cent
(WHO, 2014).
Water, Sanitation and Hygiene (WASH) are three basic dimensions of Public Health and any compromise in them has adverse consequences on health. WASH could potentially affect childhood nutrition
via at least three pathways: intestinal worms, EED and repeated bouts of diarrhoea
(Dangour et al., 2013). All three of these pathways are mediated by enteric pathogen exposure that can be prevented with WASH (Fig 2).
§ Keep clean.
§ Separate raw and cooked.
§ Cook thoroughly.
§ Keep food at safe temperatures.
§ Use safe water and raw materials.