Assessment Of Dietary Pattern And Nutritional Status Of People Living With HIV/AIDS Attending Some Voluntary And Counselling Test (VCT) Units
This study assessed the dietary pattern and nutritional status of People Living with HIV/AIDS (PLWHA) attending some voluntary and counseling test units in Kaduna metropolis.The studied subjects consisted of 74 adult patients infected with HIV between the ages of 18 and 60 years and 74 age-and-sexed-matched apparently healthy volunteers who were HIV negative as control group.A semi-structured questionnaire was used to collect information on the socio-economic and demographic characteristics of the subjects. Dietary diversity of the subjects and control were assessed using food frequency questionnaire. Blood serum total protein, total cholesterol, HDL and LDL cholesterol were determined spectrophotometrically while serum zinc and iron were measured using Atomic Absorption Spectrophotometer. Result obtained shows that majority of patients (39.19%) were between 26 and 33years. A sizeable percentages of patients (33.78%) and control (52.7%) were overweight (BMI ≥ 25.00kg/m2), while some patients (25.68%) and control (37.93%) were under weight (BMI < 18.49kg/m2).
Acquired Immune Deficiency Syndrome, popularly known as AIDS, is caused by the virus,Human Immunodeficiency Virus (HIV). This is a tiny germ that is invisible to the eye that attacks the immune system of the body. AIDS is a condition in which the virus damages the body immune system and renders it helpless against any infection, (Hawkes et al.,2002). According to the World Health Organization (2005), AIDS is the most dreaded,most feared and the most talked about disease in the world today.It is a deadly disease that has no cure. According to Ojedokun (2004), there are two main sub types: HIV I and HIVII. HIV I is the most common type all over the world while HIV II is only common in West-Africa. The intensity and the pattern with which HIV/AIDS affects nutritional status are very much different from that in other infections and in ordinary case of inadequate nutrients intake (Piwoz and Preble, 2000). Due to lack of cure for HIV/AIDS, the immune system of infected patients is under constant exposure to infections which adversely affect the nutritional status and immune competence of the subjects in question (Piwoz and Preble, 2000).Malnutrition is a serious danger for people living with HIV/AIDS. Even at the early stages of HIV infection when no symptoms are apparent, HIV makes demands on the body‘s nutritional status (Walsh et al., 2003),the risk of malnutrition increases significantly during the course of the infection. Good nutrition cannot cure AIDS or prevent HIV infection, but it can help to maintain and improve the nutritional status of a person with HIV/AIDS and delay the progression from HIV to AIDS-related diseases (Piwoz and Preble, 2000). It can therefore improve the quality of life of people living with HIV/AIDS. Nutritional care and support are important from the early stages of the infection to prevent the development of nutritional deficiencies. A healthy and balanced diet will help to maintain body weight and fitness. Eating well helps to maintain and improve the performance of the immune system the body‘s protection against infection – and therefore helps a person to stay healthy(Bartlett, 2003). Many of the conditions associated with HIV/AIDS affect food intake,digestion and absorption, while others influence the functions of the body (Bartlett, 2003).Many of the symptoms of these conditions (e.g. diarrhoea, weight loss, mouth and throat sores, nausea or vomiting) are manageable with appropriate nutrition. Good-nutrition will complement and reinforce the effect of any medication taken.In Kaduna state, there are few data on the micro nutrient status,lipid profile, prevalence of under weight and overweight among PLWHA. Hence, there is a need to study their nutritional status.
1.2 Statement of Problems
Although weight loss and wasting remain common in HIV infection, nutrition related problems such as obesity, diabetes, hyperlipideamia and hypertension also increasingly affect people living with HIV (Piwoz and Preble, 2000). A shift in causes of death from acute opportunistic infections to other causes such as cardiovascular diseases, diabetes and obesity indicates the need for a more comprehensive approach to healthy nutrition for persons infected with HIV (Walsh et al., 2003). Research has also revealed that micronutrients can modify the course of viral infection and restore the functionality of the immune system (Jariwalla et al., 2011).Studies conducted with both single and multiple nutritional supplements have shown that micronutrients act to control HIV/AIDS by; suppression of virus multiplication and spread, restoration of cell-mediated immune responses and, slowing the rate of progression and reducing the severity of AIDS (Jariwalla et al., 2011).
There are many publications on the epidemiology of the HIV/AIDS and the factors fueling the epidemic in Nigeria, but there is paucity of data on the nutritional status of people diagnosed with HIV/AIDS. Assessment of nutrition and medical status is crucial to quality nutrition care for every person living with HIV; therefore, there is a need to carry out a comprehensive study on the dietary pattern, biochemical parameters, anthropometric characteristics and micronutrient status for quality nutrition care for persons living with HIV in Kaduna metropolis.
1.4 Aim and Objectives
To investigate the dietary pattern and nutritional status of People Living with HIV/AIDS(PLWHA) attending voluntary and counseling test (VCT) units of some Hospitals in Kaduna metropolis.
1.4.2 Specific objectives
The specific objectives of the study are:
- To assess the socio economic and demographic characteristics of People Living with HIV/AIDS attending voluntary and counseling test units in Kaduna metropolis.
- To determine the anthropometric characteristics of People Living with HIV/AIDS attending voluntary and counseling test units in Kaduna metropolis.
- To assess some biochemical parameters of People Living with HIV/AIDS attending voluntary and counseling test units in Kaduna metropolis.
- To correlate the micronutrient status with some biochemical parameters of People Living with HIV/AIDS attending voluntary and counseling test units in Kaduna metropolis.
- To determine the dietary pattern of People Living with HIV/AIDS attending voluntary and counseling test units in Kaduna metropolis.
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Discussion, Summary, Conclusion and Recommendations
This present study assessed the dietary pattern and nutritional status of People Living with HIV/AIDS (PLWHA) as well as some relevant trace elements. The result of this study showed that there was a significantly (p<0.05) lower BMI and weight of patients compared to the control group. The mean BMI of people living with HIV(PLWHIV) was 22.87kg/m2and 22.87kg/m2for the control group which indicates normal body mass. The result is in accordance with reports from Opara et al., (2007). The result of this study showed that 33.78% and 25.68% of the patients were overweight and underweight respectively. This agrees with Silva et al., (2001) and Kroll et al., (2012) who found the prevalence of overweight and underweight among PLWHA. Changes in body weight of PLWHA has been extensively studied and reported. Piwoz, (2004) reported that wasting (<18.50 kg/m2) was a major and disturbing sign of HIV/AIDS which was also a predictive mortality sign. Wasting can be caused by an extremely low energy intake, nutrients losses due to infection or combination of low intake and high nutrients losses. HIV/AIDS is associated with wasting UNICEF, (2012). Ojofeitimi and Fakande, (1998), achieved weight gain in PLWHA using nutritional counseling, food demonstration and soya bean milk.This study also examined the lipid profile and the atherogenic index of PLWHA. The results of this study showed no significant difference in the total cholesterol and HDL-C levels of patients compared to control group which indicates low risk of coronary heart diseases (CHD). The HDL-C is considered to have anti-atherogenic properties, since there is negative correlation between HDL-C and risk of cardiovascular disease. It is referred to as the good‘ cholesterol because, HDL-C is involved in transport of cholesterol from peripheral tissues to liver and thereby reducing the amount stored in the tissue and the possibility of developing atherosclerotic plaques. (Toyinet al., 2008). A significantly lower LDL-C levels was observed in the patients indicating low risk of atherosclerosis. Elevated levels of all lipoprotein except the HDL are associated with increased risk of atherosclerosis. High level of triglycerides and LDL are associated with coronary artery disease (Yakubu and Afolayan, 2009). Low density lipoprotein (LDL) transport cholesterol around to where it is needed. If cholesterol level is high, it may be deposited into the arteries. The result of this study further indicated that36.49% of patients showed low levels of HDL-C (<1.0 mmol/L) and 2.7% showed elevated levels of LDL-C (>3.3 mmol/L) which implies that these proportion of the patients are at risk of developing coronary heart diseases. The LDL-C which is popularly known as the ―bad cholesterol‖ is highly atherogenic (Chia, 1991), because they are primary carriers of plasma cholesterol and builds up slowly in the walls of arteries feeding the heart and brain. As a result of this, it forms plaque that clots the arteries hereby causing atherosclerosis and increasing the risk of high blood pressure which may eventually lead to stroke (Toyin et al., 2008). As coronary arteries narrow, it limits blood flow to the heart. If an area of plaque breaks open, it can result in a blood clot, which can block blood flow altogether. This has a great risk of heart attack which could lead to permanent heart damage or death if blood flow is not restored fast. Also when plaque builds up in the arteries that carry blood to the brain, the brain is deprived of oxygen and result to brain cell damage and death of cells (stroke). A stroke can cause brain damage, disability or death (Deaton et al., 2011).Also, no significant difference was observed in the atherogenic index of the patients compared to the control group with a mean value of atherogenic index of 1.52 indicating low risk (≤ 3.0) of atherosclerosis. The atherogenic index is a ratio, which can be calculated as TC/HDL, Non HDL- Cholesterol/ HDL, LDL/HDL, TG/HDL. Non HDL- Cholesterol is calculated as (TC/HDL). (Nandeesha et al., 2008). A total cholesterol /HDL ratio of ≤ 3 connotes a low risk, a ratio of around 4.5 an average risk and ratio of ≥ 8 a high risk of developing coronary artery disease (Chia, 1991).Mean serum protein levels in this study showed significantly higher levels in patients than in control, which may reflect presence of diseases such as chronic hepatitis, tuberculosis, or 58malnutrition and mal-absorption. Elevated protein level may be due to chronic infection such as tuberculosis or early stage of HIV (asymptomatic stage), while low levels may be due to malnutrition and malabsorption, liver diseases, diarrhea, severe burns, or proteinuria. Proteins are the most abundant compounds in the serum. Amino acids are the building block of proteins.In turn, proteins are the building blocks of all cells and body tissues, antibodies and clotting agents. Protein acts as transport substance for hormones, vitamins, minerals, lipids and other materials. The total serum protein represents the sum of albumin and globulins. Optimal ranges are 7.2 – 8.1 g/100ml (Kotler, 2000).The results further showed that no significant difference was observed in the albumin levels of the patients compared to control group and where patients (50%) showed low levels (<40g/l) of albumin which may suggest dehydration, liver dysfunction, or malnutrition. Low albumin levels of albumin are associated with malnutrition, liver dysfunction, and hypothyroidism(Kotler, 2000). Elevated albumin levels may be due to poor protein utilization, congenital, etc (Kotler, 2000). Albumin is synthesized by the liver using dietary protein. It‘s presence in the plasma creates an osmotic force that maintains fluid volume within the vascular space. Albumin is a very strong predictor of health. Optimal ranges are between 40 – 55g/l, (Kotler, 2000).Furthermore, the study showed significantly lower levels of the mean CD4 counts of the patients compared to control groups with patients having a mean CD4 count of 598 cell/µl indicating normal CD4 count. The CD4 counts estimates the number of functioning CD4 cells in the blood. The higher the CD4 cells the stronger the immunity (or immune function). A normal CD4 count is typically around 500 to 1500 cells per cubic Millimeter of blood(ml)(WHO, 2008). The CD4 lymphocyte is the primary target of HIV infection because of the affinity of the virus to the CD4 surface marker. Infection with HIV leads to a progressive impairments of cellular functions characterized by a gradual decline in the peripheral bloodCD4 lymphocyte levels which result in an increasing susceptibility to a wide variety of opportunistic infection, viral, bacterial, protozoa and fungal infections (WHO, 2008).Traditionally CD4+counts have been used as a means to determine when to start antiretroviral therapy and/or prophylactic drugs meant to prevent HIV-associated opportunistic infections. But in recent years, that role has been played down as global authorities now aim to initiate treatment or diagnosis once infected rather than waiting until the CD4 counts drops to below500cells/ml (previous initiation threshold) (DHHS, 2013). CD4count is still central in the classification of the stages of the disease with counts below 200cells/ml officially classified as AIDS. The CD4 count is also used to monitor an individual‘s response to therapy (NIH, 2015).The study showed significantly (P<0.05) lower levels of zinc in the patients compared to control groups where patients (16.22%) showed higher zinc levels above normal (>22.9µg/dl)with no incidence of zinc deficiency which may be responsible for the normal BMI (18.50 –24.99 kg/m2) observed in the patients studied contrary to frequent weight loss experienced by HIV infected patients with incidence of diarrhea. Optimal zinc level is associated with decreased incidence, severity and duration of diarrhea as the importance of zinc supplementation for treatment of diarrhea, particularly among children is relatively well established (Fischer et al., 2009). Also a trial in South Africa, HIV infected children were randomized to receive either oral zinc supplementation or placebo daily for six months. There were no differences in the viral load, CD4 T-cell counts, and hemoglobin concentration between the two groups; however, zinc supplementation reduced incidence of watery diarrhea (Bobat et al., 2005). Zinc deficiency has been observed in acquired conditions, including malabsorption syndrome (McClain 1985), malnutrition (Keen, 1990), and chronic and acute infectious diseases such as HIV (Ripa and Ripa, 1994). Low zinc levels, either acquired or congenital are associated with immune abnormalities, impaired healing process and increased susceptibility to infections. (Schlesinger et al., 1993). Zinc depletion occurs either because it is not absorbed from the diet (excess copper or iron interference with absorption) or it is lost after absorption (Odeh, 1992). The amount of protein in the diet is a factor contributing to the efficiency of zinc absorption as zinc binds to protein. Small changes in protein digestion may produce significant changes in zinc absorption (Keen, 1990). Zinc is an essential element which is a component of various enzymes that help maintain structural integrity of proteins and regulate gene expression (King et al., 1999). It is a critical co-factor of carbonic anhydrase, alkaline phosphatase, and many other physiologically important proteins. The peptidases, kinases, and phosphorylases are most sensitive to zinc depletion. The biological function of zinc can be catalytic, structural or regulatory (King et al., 1999). Patients with AIDS exhibit clinical symptoms similar to those associated with zinc deficiency, including immune deficiencies, impaired taste and appetite, decreased food intake, gastrointestinal malfunction with diarrhea, alopecia, epithelial lesions and hypogonadism (King et al., 1999; Odeh, 1992).Tang et al., (1993, 1996) reported an association between excessive intakes of zinc and faster disease progression and death in HIV-1 infected men. It is well established that an excessive intake of zinc above recommended dietary allowance results in significant immune impairment of healthy adult men (Chandra, 1985). In addition, excessive intake of zinc may interfere with copper and iron utilization and affect HDL-cholesterol concentrations and monocyte function all which may contribute to HIV-1 disease progression (Fosmire, 1990, Sehlesinger et al.,1993).Zinc is associated with suppression of cell-mediated immunity which may explain the protective effect on immunological failure. For example, Zinc deficiency has been shown to lead to decreased levels of serum thymulin, a zinc-dependent thymic hormone known to induce T cell differentiation (Prasad et al., 1988). Zinc deficiency was found to be associated with decreased T4/T8 ratio, interleukin 2 levels, and natural killer cell lytic activity (Prasad et al.,1988). Zinc is also required for the regeneration of new CD4 T-cell and for maintenance of T-cytolytic cells (Beck et al., 1997). Baum et al., (2010), in their report after a study with randomized controlled trial of zinc supplementation and it efficacy among HIV infected adults in USA, stated that after 18 months of zinc supplementation reduced 4-fold the risk of immunological failures. Furthermore, biochemical evidence of Zinc and Iron differences onCD4 cells has been reported in PLWHA, (Bilbiset al., 2010), who reported a progressive decline of serum Zinc and Iron levels in HIV subjects compared with the control. Such evidence has been provided by the present study which showed a positive correlation between zinc and iron and the CD4 counts of the patients. HIV infection has been reported to be associated with increased pro-inflammatory cytokines which was reported to lower the plasma levels of zinc and iron, (Kritonet al., 2001). Zinc is required for the regeneration new CD4+cells and maintenance of T cytolytic cells, (Beck et al., 1997).The study showed significantly (P<0.05) lower levels of iron in the patients compared to control groups where patients (41.89%) showed low iron levels (< 60µg/dl) which may suggest inadequate consumption of iron-rich foods. Also experimental evidence had shown that serumiron may be increased or decreased depending on the stage of the disease although iron stores may decline in early asymptomatic HIV infection probably because of impaired absorption (Frii, 2001), they may however increase with progression of the disease as iron accumulates in the macrophages and other cells (Drakesmith and Prentice, 2008). The potential for the body concentration to be raised in HIV infection due to their accumulation in tissues such as liver, heart, pancreas and cells like macrophages is enormous and may result in free radical generation and accelerated catabolism of ascorbic acid (Delangheet al., 1998). Furthermore, potential availability of free iron due to abnormal physiology that may accompany iron overload can cause DNA double strand break and oncogene activation. (Reizenstein, 1991).Another dimension of consequences of iron increased levels is the fact that iron-rich environment not only renders the patients more susceptible to microbial infections like mycobacterium tuberculosis, candida albicans, salmonella and hepatitis viruses B and C, but promotes their proliferation with a significant contribution to the morbidity and mortality that accompanies HIV-1 infection. (Hulganet al., 2003). Iron is also an essential trace element present in biological systems in either ferrous (Fe2+) or Ferric (Fe3+) state. Transferrin, a β1glycoprotein synthesized in the liver binds iron in ferric form and transports it from the storage site for utilization through a receptor mediated pathway (Boelartet al., 1996).
The result of this study showed that all food groups were consumed across the time intervals.Patients (28.38%) consumed bread, cereals and starch foods more on the basis of 2 – 4 times per week and least (6.76%) <1times per month which indicates adequate energy intake and may account for the normal BMI observed in the patients. The benefits of providing adequate amount of energy, protein and micro nutrient for PLWHA are clear (Crum et al., 2006);however the exact amount of each type of nutrient needed is less clear. To prevent loss of weight and lean body mass, PLWHA should be encouraged to maintain adequate energy intake (Grinspoon and Mulligan, 2003). Adequate intake of macro- and micro nutrients are essential to the restoration and maintenance of body cell mass and normal function including immunity(Knox et al., 2003). Few data are available on energy needs in HIV, and although no standard level of energy intake has been established for individuals with HIV infection, the Harris Benedict equation for basal energy expenditure (BEE) with an additional stress factor of 1.3 for asymptomatic patients has been used in many studies (Shevtzet al., 1999). Each patient energy need varies based on many factors, including altered metabolism, nutrient malabsorption, nutrient depletion, severity of the disease, and opportunistic infections (Shevtzet al., 1999).Proportion of patients (28.38%) in this study consumed Meat, fish and poultry food groups more on the basis of 2 – 4times per month and Milk and dairy products were consumed by patients (34.85%) on the basis of 2 – 4times per month indicating adequate consumption of the food group which may be positively associated with normal lean body mass observed in the PLWHIV. Protein is especially critical for the maintenance of body cell mass and normal function, including immunity (MaCallanet al., 1995). The dietary reference intake recommends approximately 0.8 grams of protein per kilogram body weight each day for healthy adults (Trumbo et al., 2002). For asymptomatic HIV-positive individuals, this is likely to be adequate;however, for individuals infected with HIV who have wasted lean body mass, increased protein intake (up to 1.2 – 2.0g of protein per kilogram of body weight per day) may be beneficial (MaCallan et al., 1995). There is currently no evidence to support protein intake in excess of these levels for HIV-positive individuals (MaCallan et al., 1995). In a study conducted in 467weight-stable men with HIV infection, protein intake was associated with lower lean body mass(Grinspoon and Mulligan, 2003). This suggests that protein intake may be positively associated with lean body mass in PLWHIV. Hence increased caloric and protein intake are necessary to fight the infection (Romeyn Many, 1998).The result of this study also showed that patients (51.35%) consumed fats and oils more on the basis of ≥5times per week indicating adequate intake which may account for the normal levels (1.0 – 1.5mmol/l) of total cholesterol and HDL observed in the patients. Fat was mainly provided by red palm and vegetable oil used in frying, cooking and making of soup/sauces.There is currently no evidence that the fat requirements of PLWHIV are different from those of the general population. Although researchers are studying the potential benefits of n-3 fats in immune function, the recommendation for n-3 fats intake are currently no different than for the general population (Trumbo et al., 2002).Food rich in micro nutrients are likely to help HIV infected patients more effectively fight infection and improve overall health. Vegetables and fruits food group consumption by patients from this study showed that patients (26.39%) consumed more on the basis of 1 – 3 times per month and had least (11.11%) consumption of ≥5 times per week indicating adequate intake which may be responsible for the normal CD4 counts (≥500 cells/µl) showed by good proportion of the patients (62.14%). Some studies suggest that deficiencies and /or high intake of certain micro nutrients may affect the course of HIV disease (Jariwalla et al., 2010). Research has suggested that selenium deficiency may increase HIV-related mortality, excessive intake of zinc may be linked to poorer survival, increased intake of vitamin B1 (thiamin) and B2 (riboflavin) may enhance survival for those living with HIV, and other micro nutrient deficiencies may exacerbate the oxidative stress that is associated with HIV infection (Jariwallaet al., 2011). Although the comprehensive role of micro nutrients in the management of HIV is not yet well understood, the patient is likely to benefit from consuming a varied diet that is adequate in micro nutrients.
The major findings of this work can be summarized as follows:
- Age groups between 26–33years, (39.19%) were more in the studied population with more male patients (60.81%) and more students in male and female patients(24.32%).
- Nutritional status of patients based on BMI indicated that 33.78% were overweight(BMI ≥25.00) with more males (35.56%) than female (31.04%) being overweight while 25.68% was underweight with more occurrences in females (37.93%).
- The serum total protein levels were significantly higher (p<0.05) in patients while no significant (p>0.05) difference was observed in their albumin levels.
- The LDL cholesterol levels were significantly (p<0.05) lower in patients with more occurrence in females (65.32%) than in males (57.78%). Low levels of HDL cholesterol (<1.0mmol/l) were also recorded in some males (33.33%) and females (41.38%) patients v. Atherogenic index of patients showed no significant (p > 0.05) difference to control group.
- The CD4 counts were significantly lower (p < 0.05) in patients and based on gender was also significantly lower (p<0.05) in males while no significant (p > 0.05) difference was observed in females.
- The zinc and iron levels of the patients were significantly lower (p<0.05) and a significant (p<0.01) positive correlation was obtained when zinc and iron were correlated with their CD4 counts. Higher correlation was recorded for iron in females than in males while higher correlation for zinc in males than in females was recorded.
- More female patients have their CD4 at normal level (≥500 cell/µl) than male patients.
- Frequency of food consumption indicated that all food groups were consumed across the time intervals. Most patients consumed bread, cereal and starch, meat, fish and poultry, Milk and dairy products on frequency consumption of 2 –4 times/week while fat and oils, and vegetables and fruits were consumed on frequency consumption of ≥5 per week and 1 – 3times/month respectively.
The nutritional status of the HIV patients studied shows minimum incidence of underweight and overweight. Lower LDL levels were also recorded in few proportions while significantly lower levels of CD4 counts were observed in HIV patients. Normal total cholesterol and HDL level which implies low risk of atherosclerosis.Good dietary diversity was achieved in HIV patients as their dietary pattern showed regular intake of energy and other food groups which may account for why a lot had good BMI contrary to the usually incidence of weight loss and wasting common among PLWHIV. Normal zinc and iron levels was recorded in HIV patients which may be responsible for the normal weight observed contrary to what is observed in HIV patients with frequent diarrhea as zinc is effective in the reduction of the incidence, severity and duration of diarrhea.
- The PLWHIV should be encouraged to maintain good dietary diversification with minimum consumption of four or all the food groups.
- Attention should be given to other causes of death in PLWHA such as cardiovascular diseases and overweight.
- Nutrition education and practices should be encouraged in the management of HIV/AIDS.
- Due to the cross sectional nature of the study, it is suggested that a longitudinal assessment be carried out in the study area in order to ascertain nutrients intake of HIV infected patient over a longer period of time.