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Do the feeding practices and nutrition status among HIV-exposed infants less than 6 months of age follow the recommended guidelines in Bomet County, Kenya?

BMC Nutrition volume 2, Article number: 43 (2016) | Download Citation

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Abstract

Background

Globally, about 1.5 million pregnancies are among women living with the Human Immuno-deficiency Virus (HIV). In 2013, an estimated overall HIV prevalence of 0.34 % was reported in antenatal women in Kenya, with 13,000 new HIV infections among children. Appropriate feeding practices and good nutrition status are important for the survival, growth, development and health of HIV-exposed infants, as well as the wellbeing of their mothers. The purpose of this study was to determine the feeding practices and nutrition status of HIV-exposed infants 0–5 months of age, attending the paediatric clinic in a mission hospital in Bomet County, Kenya.

Methods

This was a cross-sectional study with quantitative and qualitative techniques in data collection and analysis. A comprehensive sample of 118 mothers/caregivers with HIV-exposed infants 0–5 months of age participated in the study. The data was analysed using SPSS software. Statistical significance was set at p values less than 0.05.

Results

Exclusive breastfeeding was practiced by the majority of the participants (73.7 %), 14.4 % practiced exclusive replacement feeding and 11.9 % mixed fed their infants. More than half the infants had normal length for age (57.7 %), weight for age (60.2 %) and weight for length (76.3 %). About a third (38.1 %) of the infants were stunted, 39 % were underweight and 19.5 % were wasted. Infants on mixed feeding were more likely to be stunted (OR = 2.401; 95 % CI: 0.906–5.806; p = 0.001) or underweight (OR = 2.001; 95 % CI: 0.328–6.124; p = 0.001) compared to those on exclusive breastfeeding. There was however, no significant difference in the likelihood for wasting among infants on exclusive breastfeeding, compared to those on exclusive replacement feeding (OR = 0.186; 95 % CI: 0.011–3.130; p = 0.996) or mixed feeding (OR = 1.528; 95 % CI: 0.294–7.954; p = 0.614). No significant differences were observed in the likelihood for malnutrition among infants on exclusive breastfeeding, compared to those on exclusive replacement feeding.

Conclusion

Most mothers/caregivers fed their infants as recommended. The 11.9 % who did not observe the recommendations were however, at risk for contracting HIV. We recommend that the Ministry of Health and National AIDS and STI Control Programme develop a policy to support infants who qualify for exclusive replacement feeding but whose mothers/caregivers face constraints in compliance.

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Background

Globally, about 35.3 million people are now living with the Human Immunodeficiency Virus (HIV), with women comprising more than half of this population [1]. Further, 1.5 million pregnancies are among women living with HIV, globally. In Kenya, the latest statistics indicate that there are approximately 1.6 million people living with HIV, 191,840 of them being children. The total number of deliveries by HIV positive mothers in Kenya was about 79,000, while 13,000 new HIV infections were recorded among children [2].

The World Health Organization (WHO) recommends that for HIV-exposed infants, the national health authorities should promote a single infant feeding practice as the standard of care for the prevention of mother-to-child transmission of HIV, and information about other practices be made available to mothers [3]. Kenya has adopted exclusive breast-feeding (giving infant only breast milk and no other liquids or solids except drops or syrups consisting of vitamins, minerals, or medicines) for the first 6 months after birth, introduction of appropriate complementary foods thereafter, and continued breastfeeding for the first 12 months after birth [3]. Breastfeeding should then only stop once a nutritionally adequate and safe diet can be provided without breast milk.

In circumstances where breastfeeding is not possible, exclusive replacement feeding (giving infant a suitable breast milk substitutes in the form of commercial infant formula, with no breast milk) is recommended. This exclusive replacement feeding (ERF) should be acceptable, feasible, affordable, sustainable and safe [3]. Exclusive breastfeeding (EBF) rates among all infants 0–5 months of age in Kenya has increased from 35 % in 2010 to the current 61 %, while the rates for Bomet County are not documented [4]. There is limited literature on the EBF rates among HIV-exposed infants in particular. Scientific evidence shows that sub-optimal infant and young child feeding practices among HIV-exposed children result in malnutrition presenting as growth faltering [5–8]. As a result, growth failure as seen in stunting and underweight is considered an early marker of HIV infection [7]. The practice of EBF and ERF reduce the likelihood of mother to child transmission of HIV.

Studies have shown that in resource-limited settings, there is early occurrence of under- nutrition before the age 3 months in both HIV-infected and HIV-exposed uninfected children, with high mortality rates as well [9–12]. In Kenya, the prevalence of stunting among the general population of children less than 5 years of age is 26 %, underweight is at 4.3 % and wasting is at 3.7 %, while in Bomet County, the prevalence of stunting is 35.5 %, underweight is 12 % and wasting is 1.8 % [4]. These high rates in the general population indicate that the prevalence could be higher among HIV-exposed infants. There is however, limited literature on the nutrition status of HIV-exposed infants 0–5 months of age. This study highlights the gaps in feeding practices and nutrition status of HIV-exposed infants 0–5 months of age and can therefore inform policy makers and implementers of areas to focus on when designing interventions for this category of children.

Methods

The purpose of the study was to determine the infant feeding practices and nutrition status of HIV-exposed infants 0–5 months of age attending the paediatric clinic in a mission hospital in Bomet County.

Study design, setting and period

The study adopted a cross-sectional design with mixed methods (quantitative and qualitative approaches) in data collection and analysis. The study was conducted at a referral mission hospital in Bomet County. The hospital has several clinics, including one for Maternal and Child Health, where the Paediatric clinic is based. Services offered at the paediatric clinic include: growth monitoring, immunization and treatment of various childhood illnesses, as well as HIV- related care for women and children [13]. Bomet is a rural County located in the former Rift Valley Province of Kenya with a population of 730,129 as per 2009 national census [14]. The main economic activities in the county include farming for subsistence and cash, tourism and sports [14].

Data was collected for 3 months between November 2015 and January 2016.

Study participants

The target population was pairs of mothers/caregivers and infants between 0–5 months of age born by mothers living with HIV (HIV-exposed) who were attending the paediatric clinic in the mission hospital. The mission hospital had registered 127 HIV-exposed infants 0–5 months of age during the study period. Infants born with very low birth weight (less than 1500 g) as recorded in the Maternal and Child Health booklet as well as mothers/caregivers who declined to participate were excluded from the study.

Sample size and sampling techniques

The calculated sample size was 112, based on the exclusive breastfeeding rates of 35 % and a sampling frame of 127 HIV-exposed infants 0–5 months of age in the county, at the time of the study. A further 10 % was added to cater for non-response. Comprehensive sampling was then adopted in which all eligible mother/ caregiver-infant pairs were recruited (121). This is because the calculated sample size and the sampling frame were almost equal in number.

Every consecutive mother/caregiver with a HIV-exposed infant 0–5 months of age who consented to participate in the study was recruited once to avoid duplication of data collected. One hundred and twenty seven mothers/caregivers were eligible for the study, 121 consented while 6 declined, and therefore, 121 mothers/caregivers were recruited to participate in the study. Out of the 121 questionnaires, 118 were analysed as 3 infants had very low birth weight and thus their questionnaires were not included in the analysis. The response rate was therefore, 97.5 %.

Additionally, 11 key informants were interviewed. Key informants were purposively selected; all nutritionist, nurses, clinicians and adherence counsellors who provided services to the mothers living with HIV at the mission hospital’s paediatric clinic. They were purposively selected because they were knowledgeable of the context specific information for mothers living with HIV registered at the health facility. For the FGDs, participants were selected using simple random sampling based on their reported mode of feeding. Two groups of 10 and 9 mothers/caregivers each were selected from those who had exclusively breastfed, 8 were selected among those who had practiced exclusive replacement feeding and 8 among those who had mixed fed.

Data collection instruments and procedures

A validated and pre-tested researcher-administered questionnaire, a Focus Group Discussion guide and a Key Informant Interviews guide were used for data collection. The questionnaire had three sections. Section A was used for recording the anthropometric data of the infant, while Section B elicited information on socio-economic characteristics of the mothers/caregivers (education, occupation and income), demographic characteristics of the mothers/caregivers (age, marital status, religion, ethnicity, parity), infant characteristics (age and sex) and infant illness in the previous 2 weeks. Questions in the Kenya Demographic Health Survey questionnaire were adopted for this section. Section C comprised of the generic Infant and Young Child Feeding questionnaire by CARE USA (2010) [15] which applies the WHO indicators for Infant and Young Child Feeding. It elicited information on the feeding practices of the infants in the previous 24 h which enabled classification into exclusive breastfeeding, exclusive replacement feeding and mixed feeding. Three questions were further adopted from the World Health Organisation’s indicators for assessing Infant and Young Child Feeding Practices questionnaire and added to elicit information on: time of breastfeeding initiation after birth and baby’s first feed after birth (breast milk or pre-lacteal) [16]. The questionnaire was translated to Kipsigis, the native language in Bomet County, to cater for mothers/caregivers who did not understand English.

The questionnaires were researcher-administered during face to face interviews conducted with mothers/ caregivers. A total of four focus group discussions were also conducted with mothers/caregivers and the number of participants per group was 8, 8, 9 and 10 respectively. The areas that were covered in the discussions included the mothers/caregivers infant feeding experiences, health services they received and challenges they faced in their choice of infant feeding. The key informant interviews were conducted with 3 nutritionists, 4 nurses, 2 clinical officers and 2 adherence counsellors who provide services to HIV-exposed infants 0–5 months of age at the paediatric clinic. The discussions and interviews were audio tape recorded. To determine the nutrition status, anthropometric rmeasurements of weight and length were taken using the WHO recommended instruments and procedures [17].

Data analysis

Statistical analysis was conducted using Statistical Package for Social Sciences (SPSS) version 22. Infant’s nutrition status was analysed using ENA for Smart software version 2011 and then exported to SPSS. Nutrition status was assessed based on the WHO 2006 growth standards Z-score cut offs for length-for-age, weight-for-age, and weight-for-length z-scores [17]. Infant feeding practices were analysed based on the WHO and Ministry of Health recommendations for HIV-exposed infants 0–5 months of age, and were classified as exclusive breastfeeding, exclusive replacement feeding and mixed feeding. The analysis on infant feeding was categorised into mode of feeding in the previous 24 h and mode of feeding since birth. The modes of feeding were defined as: Exclusive breastfeeding when infant received only breast milk and no other liquids or solids except drops or syrups consisting of vitamins, minerals, or medicines; Exclusive replacement feeding when infant received nothing else except a suitable breast milk substitutes in the form of commercial infant formula; and Mixed feeding when infant received breast milk and any other food or liquid including water, non-human milk and formula. For the mode of feeding since birth, infants who had received pre-lacteals and/ or post-lacteals were classified as mixed feeding regardless of the feeding mode in the previous 24 h. Statistical significance was set at p < 0.05.

For qualitative data, content analysis was conducted for the Focus Group Discussions and Key Informant Interviews. The discussions and the interviews were transcribed verbatim and translated into English by the researchers. They were then read through several times by the researchers and the information from the FGDs categorized into sub-themes: experiences the mothers/caregivers had on feeding practice chosen; challenges faced; and suggestions for feeding practices of HIV-exposed infants. The information categories obtained in the focus group discussion analysis were used to organize the information in each key informant interview according to the informant category: nutritionist, nurses, adherence counsellors and clinical officers. Illustrative quotations were also selected from the discussions and interviews.

Logistical and ethical considerations

Ethical clearance was sought from Kenyatta University Ethical Review Committee PKU/381/E33 and Tenwek Institution Research Committee. A research permit was obtained from the National Commission for Science, Technology and Innovation. Informed voluntary consent was sought from the mothers/caregivers and healthcare workers in form of signatures or thumb-print. Participants’ privacy and confidentiality has been ensured by the use of codes rather than names.

Results

Demographic characteristics of infants and their mothers/caregivers

There were more female infants (54.2 %), than males (45.8 %). The majority (45.8 %) were 2–3 months of age, while those of 0–1 month of age comprised 10.2 % of the total study population (Table 1). The mothers/caregivers’ ages in complete years ranged from 16–36 years with a mean age of 25.2 ± 3.6 years. Most mothers/caregivers (69.4 %) were married, 22 % were never married and 7.7 % were either divorced or separated. More than half of the participants (58.5 %) had only 1 child, 35.6 % had 2 to 3 children while 5.9 % had more than 3 children. Most of the participants were the infants’ mothers (96.6 %) while 3.4 % were caregivers.

Table 1 Socio-economic and demographic characteristics of the mothers/caregivers
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Socio-economic characteristics of the mothers/caregivers

More than half of the mothers/caregivers had completed primary education (55.9 %), with 9.3 % having no formal education. More than a third of the participants (39 %) were housewives (Table 1). Most mothers/caregivers (69.5 %) were earning a monthly income of between 0 and 5000 Kenyan Shillings (0–50 United States Dollar); 100 Kenyan shillings = 1 United States Dollar.

Feeding practices among the infants

From the findings, most mothers/caregivers (95.3 %) who breastfed their infants met the WHO recommendation of initiating breastfeeding within the first 1 h of birth (Table 2). Another positive finding was that most mothers/caregivers (92.5 %) did not give pre-lacteals upon delivery as only 7.5 % reported having given pre-lacteals. Further, majority of the mothers (90.7 %) had ever breast fed their infants since birth, with 89.7 % having breastfed their infants in the last 24 h. The findings show that most mothers/caregivers followed the WHO recommendations of infant feeding, as 73.7 % of them exclusively breast fed their infants, while 14.4 % practiced exclusive replacement feeding. Only 11.9 % mixed fed their infants. All infants reported to have been breastfed were by their biological mothers as no wet nursing or use of donated breast milk was reported.

Table 2 Breastfeeding practices since delivery
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The findings from the focus group discussions and key informant interviews, were in agreement with the quantitative findings as most participants felt that all mothers should breastfeed their infants and that breastfeeding should start immediately after birth. The majority of the participants in the focus groups did not support giving other foods to the baby before initiating breastfeeding. A few felt that they needed to give a little water, ‘I normally give water as it makes the throat wet and because the milk may not have started coming out yet,’ (M1FGD1, 2015).

Exclusive breastfeeding (EBF) was practiced by most of the mothers and most of them had a positive attitude towards it. Those on EBF and exclusive replacement feeding (ERF) reported to have gotten information from the healthcare practitioners during their antenatal clinic visits. Those who breastfed said they chose to breastfeed because of its availability, requires no preparation and is nutritionally balanced. Those who chose to practice ERF however, had mixed opinions. Some chose to practice ERF because they feared transmitting the virus to the child, one of the caregivers reported choosing ERF because the mother of the infant died after delivery while another chose ERF because she was advised by a healthcare worker. Most mothers/caregivers agreed that mixed feeding was an inappropriate choice of feeding. One of the mothers/caregivers (M2FGD4, 2015) said, “We are advised in the ANC clinic not to give our children any food other than breast milk before 6 months.” From the key informant interviews EBF and ERF were part of the health education given at the Maternal and Child Health clinic.

Nutrition status of the infants

More than half of the infants were well nourished (normal), based on their length for age (57.7 %), weight for age (60.2 %) and weight for length (76.3 %) z-scores (Table 3). The mean length for age, weight for age and weight for length were -0.47 ± 1.5, -0.50 ± -0.01 and -0.08 ± 1.04 respectively (Table 3).

Table 3 Nutrition status of infants
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Prevalence of morbidity in the previous 2 weeks and its association with nutrition status

Majority of the infants (90.7 %) had not had any illness in the previous 2 weeks. Only 9.3 % had fallen ill with most of them having diarrhoea (Table 4).

Table 4 Prevalence of morbidity in the past 2 weeks
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The likelihood of illness was analysed by nutrition indices. There was no significant association between recent illness and stunting as well as underweight (Table 5). There was however, a significantly higher likelihood of wasting among infants who had been ill in the previous 2 weeks. Infants who were ill were 20.57 times more likely to be wasted than those who were not ill.

Table 5 Likelihood of recent illness and nutrition status
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Association between nutrition status and infant feeding practices

There was no significant difference in the likelihood of stunting and underweight among infants on exclusive breastfeeding with those on exclusive replacement feeding (OR = 0.885; p = 0.110; 95 % CI 0.061–2.327) and (OR = 0.861; p = 0.243; 95 % CI 0.152–4.682) respectively (Table 6). In contrast, infants on mixed feeding were 2.401 and 2.001 times more likely to be stunted and underweight than those on exclusive breastfeeding (OR = 2.401; p = 0.001; 95 % CI 0.906–5.806) and (OR = 2.001; p = 0.001; 95 % CI 0.328–6.124) respectively. There was however no significant difference in the likelihood of wasting among infants on exclusive breastfeeding with those on exclusive replacement feeding (OR = 0.186; p = 0.996; 95 % CI 0.011–3.130) and on mixed feeding (OR = 1.528; p = 0.614; 95 % CI 0.294–7.954).

Table 6 Association between nutrition status and infant feeding practices
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Comparison of mean z-scores by mode of infant feeding

The mean z-scores for weight for length, weight for age and length for age were also compared by modes of feeding. The mean weight for length z-scores for infants on exclusive breastfeeding, exclusive replacement feeding and mixed feeding were not significantly different (ANOVA; p = 0.151) (Table 7). The mean weight for age for those on mixed feeding was significantly different from those on EBF (ANOVA; p < 0.001) and ERF (ANOVA; p < 0.001). Those on EBF and ERF however, had no significant difference in their mean weight for age. Similar findings were observed for mean length for age z-scores.

Table 7 Comparison of mean z-scores by mode of infant feeding
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Discussion

The findings of this study in which more infants were on exclusive breastfeeding, compared to those on exclusive replacement feeding and mixed feeding show the same trends as the Kenyan Demographic and Health Survey (KDHS) in which most infants are on EBF [4]. The KDHS however, covers data of the general population with no clear statistics on HIV specific rates of exclusive breastfeeding. Other studies with similar findings among HIV-exposed infants include a study conducted in Kisumu, Kenya, and another one in northwest Ethiopia where majority of the mothers practiced exclusive breastfeeding [18, 19]. The findings of this study were however, higher than the findings in studies conducted in India (37.2 %) and Yobe State and Ibadan in Nigeria (21.1 and 6.2 % respectively) [20–22]. HIV-exposed infants who are on mixed feeds are at increased risk of contacting the HIV through breastfeeding since mixed feeding carries a greater risk of transmission because the other liquids and foods given to the baby alongside the breast milk can damage the already delicate and permeable gut wall of the infant and allow the virus to be transmitted more easily. Mixed feeding also poses the risks of contamination and diarrhea [10, 23, 24].

The findings from this study on nutrition status are in agreement with KDHS where the level of stunting in Bomet County is 35.5 %, underweight (12 %) and low wasting (1.8 %) [4]. Some of the possible reasons for these high levels of malnutrition could be low socio-economic status as most of the mothers/caregivers in this study were of low socio-economic status. Similar findings were found in studies conducted in Nairobi, Kenya, where there was a drop in length for age, weight for age and weight for length z-scores by the age of 3 weeks among HIV-exposed infants [10, 25]. In the wider African context, studies conducted in Tanzania, South Africa and in Zambia also yielded similar results [26–28]. In contrast, the rates of stunting, underweight and wasting among HIV-exposed infants 0–6 months of age were low in studies conducted in Tanzania and Europe [29–31]. They however, found significantly lower nutrition status as age increased. In the study conducted in Tanzania, stunting, underweight and wasting were prevalent among HIV-exposed infants at 8.7, 7.0 and 7.2 months respectively [30].

As expected, the nutrition status was better among infants who were on exclusive breast feeding and exclusive replacement feeding as recommended by WHO. The finding where most infants on exclusive breastfeeding and exclusive replacement feeding had normal nutrition status was not unique to this study. Katepa-Bwayla [32] also found that nutrition status was significantly associated with infant feeding practices in Zambia, where those on EBF were likely to have good nutrition status. Findings from studies conducted in Nairobi, and Bangladesh were also similar to the current study where infants who were not on EBF for 6 months were more likely to be underweight than those who were on EBF [33, 34].

In contrast, in Nigeria no significant association was found between type of feeding and HIV exposure at 6 weeks, while in Malawi, EBF was not associated with length for age, weight for age or weight for length z-scores among infants 0–6 months [10, 35]. Another study in Europe found neither length nor weight to be associated with HIV-exposure at birth [31]. Differences between infected and uninfected children however increased with age in this study. A randomized control trial conducted in Nairobi also found no significant difference in the nutrition status of infants on EBF and those on ERF. Stunting was however prevalent among these children at the age of 2 years [26].

The positive influence that exclusive breastfeeding and exclusive replacement feeding had on the nutrition status of infants in this study can be explained by the fact that breast milk is the best source of nourishment as it has complete nutrients and confers immunological benefits to the baby. Further, in exclusive breastfeeding, there is less exposure to unsafe water as is common in resource-limited settings, which could result in illnesses such as diarrhoea and vomiting, as well as poor nutrition status. Most women in this study were of low socio-economic status, and thus exclusive replacement feeding may not be acceptable, feasible, affordable, sustainable or safe in this setting. This study adds to the existing evidence that exclusive breastfeeding promotes good nutrition status among HIV-exposed infants. It therefore, supports the recommendations by WHO and Kenya’s Ministry of Health.

Limitation of the study

The study did not reveal the influence that time or different seasons in the year may have on infant feeding practices, as well as the changes in feeding practices that may occur with infant age, as this information was only collected at one point in time. The sample size was also limited due to the small sampling frame and the target population which was HIV-exposed infants 0–5 months of age. The study therefore adopted a comprehensive sample in which all those who met the inclusion criteria participated in the study.

Conclusion

Most participants followed the recommended feeding practice (exclusive breastfeeding or exclusive replacement feeding). Mixed feeding was recorded for 11.9 %, implying that this population is at a higher risk for mother to child transmission of HIV as well as malnutrition and other childhood illness such as diarrhoea and upper respiratory tract infections. More than a third of the infants were chronically malnourished, with a fifth acutely malnourished. Mixed feeding increased the likelihood for malnutrition. We recommend that the Kenya Ministry of Health and National AIDS and STI Control Programme develop a policy to support infants who qualify for exclusive replacement feeding but whose mothers/ caregivers face constraints in complying.

Abbreviations

EBF, exclusive breast feeding; ERF, exclusive replacement feeding; HIV, Human Immunodeficiency Virus; IYCF, infant and young child feeding; LAZ, length-for-age Z-scores; WAZ, weight-for-age Z-scores; WHO, World Health Organization; WLZ, weight-for-length Z-scores

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Acknowledgment

We would like to acknowledge the assistance of Mr. Joseph Waitara who assisted in the data analysis.

Funding

The study was funded by the authors.

Availability of data and materials

The authors will not share the data because the health facility has not granted permission for use in repositories.

Authors’ contributions

PCL: initiation of the study, design, implementation and writing. IAO: design, implementation, analysis and writing. AS: implementation and co- writing. GO: critique and writing. MM: critique and writing. All authors read and approved the final manuscript.

Competing interests

The authors declare no competing interests.

Consent for publication

Not applicable.

Ethics approval and consent to participate

Ethical clearance for the study was sought from Kenyatta University Ethical Review Committee number PKU/381/E33 and Tenwek Institution Research Committee. A research permit was obtained from the Kenyan National Commission for Science, Technology and Innovation.

Voluntary informed consent was sought from all mothers/caregivers and healthcare workers in form of signatures or thumb-prints. Those who declined to participate were excluded from the study. Participants’ privacy and confidentiality has been ensured by the use of codes rather than names.

Author information

Affiliations

  1. School of Applied Human Sciences, Department of Food, Nutrition and Dietetics, Kenyatta University, P.O BOX 43844-00100, Nairobi, Kenya

    • Purity Chepkorir Lang’at
    •  & Irene Awuor Ogada

  2. School of Nursing and Department of Community Health and Epidemiology, Dalhousie University, 3869 University Avenue, Nova scotia, Canada

    • Audrey Steenbeek

  3. School of Tourism, Hospitality and Events Management, Department of Tourism Management, Moi University, P.O.BOX. 3900-0301, Eldoret, Kenya

    • Godfrey Odinga

  4. General Surgery Department, Tenwek Hospital, P.O Box 39-20400, Bomet, Kenya

    • Michael M. Mwachiro

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Corresponding author

Correspondence to Purity Chepkorir Lang’at.

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Keywords

  • HIV-exposed
  • Infant feeding
  • Exclusive breastfeeding
  • Exclusive replacement feeding
  • Mixed feeding
  • Nutrition status
  • Stunting
  • Wasting
  • Underweight

BMC Nutrition

ISSN: 2055-0928

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