Open-access Prevalence of intestinal parasitic diseases in school children of rural areas of district Lower Dir, Pakistan

Prevalência de doenças parasitárias intestinais em escolares de áreas rurais do distrito de Lower Dir, Paquistão

Abstract

Present study was conducted among school children to recognize the prevalence of IPIs in rural communities of district Dir Lower, Pakistan. A sum of 324 samples of stool were collected (210 boys and 114 girls). Used direct smear method and formol ether sedimentation concentration technique for processing the samples. The result shows that 82% (n=266) were found infected comprised 64.8% male and 35.1% females. Children of the age group 10 to 12 years were found extremely infected 94.2% while 4-6 year age group were having minimum ratio of infection 72%. Current study shows mono parasitism in 50.6% of the students while 22.2% were infected with 2 species and 7.40% were infected with three species of parasites. Seven species of intestinal parasites were reported include Ascaris lumbricoid in male (n=122) 58.0% and in female (n=65) 57.0% followed by Hook worm (n=88) 41.9% and (n=44) 38.5%; Tania saginata (n=44) 20.9% and (n=24) 21.0%; Entrobius vermicularis (n=32) 15.2% and (n=16) 14.0%; Trichuris trichura (n=25) 11.9% and (n=22) 19.2%; Hymenolepis nana (n=24) 11.4% and (n=18) 15.7% and Entameoba histolytica (n=16) 7.61% and (n=14) 12.2% in male and females respectively. The study indicates that most occurring intestinal parasite in the current study were Ascaris lumbricoides 58.0% (n=122) followed by hookworms 41.9% (n=88). Male students were more infected than females in the present study.

Keywords:  intestinal parasite; infection; school children; Dir Lower; Pakistan

Resumo

O presente estudo foi conduzido entre crianças em idade escolar para reconhecer a prevalência de IPIs em comunidades rurais do distrito de Dir Lower, Paquistão. Foram coletadas 324 amostras de fezes (210 meninos e 114 meninas). Método de esfregaço direto usado e técnica de concentração de sedimentação de formol éter para processar as amostras. O resultado mostra que 82% (n = 266) dos infectados eram 64,8% do sexo masculino e 35,1% do feminino. Crianças da faixa etária de 10 a 12 anos foram encontradas extremamente infectadas 94,2%, enquanto a faixa etária de 4 a 6 anos apresentava proporção mínima de infecção de 72%. O estudo atual mostra monoparasitismo em 50,6% dos alunos, enquanto 22,2% estavam infectados com 2 espécies e 7,40% estavam infectados com três espécies de parasitas. Sete espécies de parasitas intestinais foram relatadas incluindo Ascaris lumbricoid em machos (n = 122) 58,0% e em fêmeas (n = 65) 57,0% seguido por anzol (n = 88) 41,9% e (n = 44) 38,5%; Tania saginata (n = 44) 20,9% e (n = 24) 21,0%; Entrobius vermicularis (n = 32) 15,2% e (n = 16) 14,0%; Trichuris trichura (n = 25) 11,9% e (n = 22) 19,2%; Hymenolepis nana (n = 24) 11,4% e (n = 18) 15,7% e Entameoba histolytica (n = 16) 7,61% e (n = 14) 12,2% em homens e mulheres, respectivamente. O estudo indica que os parasitas intestinais que mais ocorreram no presente estudo foram Ascaris lumbricoides 58,0% (n = 122), seguidos por ancilóstomos 41,9% (n = 88). Estudantes do sexo masculino foram mais infectados do que do sexo feminino no presente estudo.

Palavras-chave:  parasita intestinal; infecção; crianças em idade escolar; Dir Lower; Paquistão

1. Introduction

Intestinal parasite in Pakistan is the main cause of morbidity also in India and Bangladesh and other emerging states but also is the common cause of death in developed countries (Liu et al., 2012). Parasites are mostly endemic and are widespread in some parts of the world so disease pattern varies in different geographic places. Helminth parasitic diseases are the topmost neglected tropical diseases (NTDs) comprised 24% population in the world reported to be infected with helminth transmitted from soil.

Intestinal parasitic infection is widely spread in in China, East Asia, sub-Saharan Africa and Americas (WHO, 2018). In the ASEAN nations, it is expected that 300 million individuals are infected with intestinal helminth infections which is caused by soil transmitted helminth; specifically, A. lumbricoides infected 126.7 million people, T. trichiura infected 115.3 million and hookworm infected 77.0 million people (Hotez et al., 2015). Human being carry different kinds of parasites which contains both protozoan and helminth; protozoan include G. lambia, Cryptosporidium and E. histolytica species while helminths contain of roundworm such as flat worms and tape worm. Ascariasis, amoebiasis, trichuriasis, giardiasis and hookworm infection these disease are caused by different type of parasite and these are the main disease worldwide (NTDs) (WHO, 1987).

The common cause intestinal parasitic infections include improper sanitation and no access to safe drinking water. Individuals of all ages may get infection by the parasite with poor water and sanitation conditions but the small children are most vulnerable to the parasitic infection (Anwar et al., 2015). Due to the presence of parasitic infection the children have poor physical, mental and social health problem and poor job performance and loss of employment (Siddiqui et al., 2002). Under developed countries the poor people are susceptible to reoccurrence of under nourishment and constant infections prominent to more than necessary disease that can transfer from generation to generation (Mehraj et al., 2008). Causative agents of intestinal parasites for chronic diseases such as iron deficiency anemia, vitamin deficiencies, protein depletion, physical and mental health problems, stunted growth in children, diarrheal diseases, or even causes surgical problems like intestinal obstruction and increased susceptibility to other infections cognitive impairment and malnutrition (Quihui et al., 2006).

Major cases of IPIs are without symptoms and left long-lasting effects (Khan et al., 2004). The constipation, headache, intestinal discomfort, indigestion, nausea, cramps, diarrhea, reduced hunger and inflammation are the symptoms of IPIs. The sign and symptoms of IPIs are characteristically related with the symptoms of non-communicable diseases, bacteria and viruses (Gordon and Cook, 2009). Anticipation of intestinal parasite comprise to improve environmental cleanness to increase hand washing facilities of the children and also stimulate children shoes wearing routines, promote education of the children at the initial age at the institution and at family, train the students about personal hygiene and providing clean drinking water (Gelaye et al., 2014).

Most of the studies have been conducted on intestinal parasitic infections in Pakistan time by time, however Malakand region the north west of Pakistan is also been screened as Khan et al. (2011, 2012, 2014, 2015, 2016, 2017a, b, 2018, 2019a, b, 2020) and Noor-un-Nisa et al. (2012).

Current study aimed to examine the prevalence of intestinal helminth and protozoans in school children of rural areas of district Dir Lower, Pakistan.

2. Materials and methods

2.1. Area and climatic condition

Dir Lower is limited in the South Malakand division, in the North it is meet with Dir Upper, in the East Swat and it is connected on its West to Bajawar. Afghanistan join the higher mountains of the north-west hilly areas. The altitude of area ranges from 1200m to 2800m asl. The weather of the District mainly depends on elevation. The 11.22°C and 2.39°C extreme and lowest temperature. The winter period is start from mid- November to March. According to census of 2017 the overall population of district Dir lower is 1435917. Out of 1435917 the 710335 population of the male and the total population of the female were 725576 present in the district (Figure 1).

Figure 1
Parts of the region studied.

2.2. Collection of stool sample

School children of the study areas were informed to collect their stool samples. Stool sample were collected from both sexes of different age groups at primary schools of rural areas of district Dir Lower. Among the students dry, clean and appropriately labelled plastic bottle were distributed for the collection of stool sample. The plastic sample bottles accurately recognized by indicting code, tag, class, roll number sexes, age and their name. The plastic bottles were deliver a day earlier for the collection of stools samples. Students were being guide that stool not mix with water, urine or any mud. In the next morning the students who bring the bottle of stool sample we was reported their physical condition, weight and habits, family position joint family or not and their parent profession also noted their name, age, gender, class in the register. The collected stool sample were fixed in 10% formalin or formaldehyde and transfer to the Parasitology Laboratory, Department of Zoology, University of Malakand Dir Lower KPK Pakistan for parasite examination.

2.3. Laboratory screening of stool samples

First the stool sample examine by naked eye for the recognition of adult or any segmental phase of parasite. For the investigation of intestinal parasite, we were used two methods including direct smear method and formol ether sedimentation concentration method. In these cases, to increases the chances of detecting parasitic organisms we were used formol ether sedimentation concentration technique. In direct smear method we were take a 1gm of fecal material and small drop of 10% formalin and mixed 10% formalin and 1gm stool sample with the help of wooden applicator. After maxing the material we were put one drop of liquid on the center of microscopic slide. Cover with a cover slip and slides were observed under microscope first under low power objective 10x and then 40x high power objective. Direct smear technique were used for the recognition of helminths egg.

2.4. Statistical analysis

Graph paid version 5 was used to analyze the data statistically, however we have considered P value significant when less than 0.05.

3. Results

An overall 324 stool sample was collected from both boys and girls students of the rural area of district lower Dir. out of 324 (n=210) stool sample were collected from boys student and (n=114) stool sample were collected from girls. 64.8% (n=210) was the prevalence rate of IPIs in boys and 35.1% (n=114) prevalence rate in females. In current study boys were more infected as compared to girls. Two hundred and sixty six (82.0%) were the total prevalence of infection. Seven species of intestinal parasites including A. lumbricoides (57.7%) led by hook worm (40.7%), T. saginata (20.9%), E. vermicularis (14.8%), T. trichura (14.5), H. nana (12.9%) and E. histolytica (9.25%) were reported. In relation to the age groups 10-12 years children were found extremely infected as 94.2% (n=66) followed by age group of 13 to 15 years as 92.8% (n=26) then the age group 7 to 9 years 84.4% (n=66) while 4 to 6 years age group were having low rate of infection 72% (n=98).

An overall 324 school children were selected for the occurrence of intestinal parasitic infections containing (n=210) 64.8% boys and (n=114) 35.1% was girls and 82.0% was the total prevalence of intestinal parasite in the present study. 162±67.8 were the Mean & SD displayed (Table 1).

Table 1
Demographic features of the studied population.

In the present study out of the total 82.0% were form positive for parasitic infection. This is comprising (n=176) 83.8% in boys and (n=90) 78.9% were girls students. (n=34) 16.1% was found negative for boys and (n=24) 21% in girls students in present study (Table 2). The association of the studied sample, positive and negative number of applicants were non-significant statistically (P > 0.005).

Table 2
Gender wise prevalence of IPIs among school children at district Lower Dir, Pakistan.

Current study shows that a total of seven species of intestinal parasite were identified from both boys and girls children containing A. lumbricoides (n=122m) 58.0% and (n=65f) 57.0%; hook worms (n=88m) 41.9% and (n=44f) 38.5%; T. saginata (n=44m) 20.9% and (n=24f) 21.0%; E. vermicularis (n=32m) 15.2% and (n=16f) 14.0%); T. trichura (n=25m) 11.9% and (n=22f) 19.2%; H. nana (n=24m) 11.4%and (n=18f) 15.7% and E. histolytica (n=16m) 7.61% and (n=14f) 12.2% individually (Table 3). The relationship among boys and girls students for the total parasites identified is non-significant statistically (P > 0.005).

Table 3
Gender wise prevalence of IPIs amongst school children in rural areas of Lower Dir, Pakistan.

In school children age is a strong sign of disease occurrence that why the occurrence of intestinal parasites were studied in school going children of rural area of District lower Dir. In both sexes maximum students were contributed in 4 to 6 years age group then 7- 9 years age group, 10 to 12 year and 13-15 years of age group (Table 4). The relationship between age groups and sexes of the applicants was not significant statistically (P > 0.005).

Table 4
In relation to gender and age the IPIs amongst school children at district Lower Dir, Pakistan.

In the current study school children of 10-12 years age group was found greatly infected (n=66) 94.2% with intestinal parasite infection which is led to the age group of 13 to 15 year (n=26) 92.8% then 7-9 year age group (n=66) 84.4% while the age group 4 to 6 year (n=98) 72% having low rate of infection in school going children of rural area of Dir Lower. 13-15 year age group children were identified to be highly uninfected (n=22) 78.5% which is followed by the age group of 10-12 year (n=16) 22.8%, age group of 7-9 year (n=8) 8.88% while 4-6 year age group having minimum rate of uninfected (n=12) 8.82% in the current study (Table 5). The relationship among infected and non-infected applicants were highly significant (P > 0.001).

Table 5
Prevalence of intestinal parasitic infection in relation to the age groups of school children at rural areas of district Lower Dir, Pakistan.

Out of 266 infected school children, (n=164) 50.6% were found infested with single parasite species. The mono parasitism was recorded in the present study as A. lumbricoides (n=82) 25.3% led by Hook worms (n=40) 12.3%; T. trichura (n=13) 4.01%; H. nana (n=12) 3.70%; T. saginata (n=6) 1.85%; E. vermicularis (n=6) 1.85%and E. histolytica (n=5) 1.54% respectively reported in the present study. The most frequent intestinal parasite in the current study were A. lumbricoid (n=82) 25.3% trailed by Hook worm (n=40) 12.3% and the minimum parasite in the current study were E. histolytica (n=5) 1.54% recorded mono parasitic infection shown in (Table 6).

Table 6
Mono parasitism of intestinal parasite infection in school children of rural area of district Lower Dir, Pakistan.

Out of 266 infected school children, (n=104) 32.0% were found to be infected with poly parasitism infection. The poly parasitism of two species (n=72) 22.2% were noted as hook worm+ A. lumbricoides (n=20) 6.17%, T. trichiura +E. vermicularis (n=15) 4.62, Hook worm+ A. lumbricoides (n=12) 3.70%, E histolytica +A. lumbricoides (n=10) 3.08%, H. nana + Hook worm (n=8) 2.46% and E. vermicularis +E. histolytica (n=7) 2.16% were recorded. Poly parasitism of the three species (n=24) 7.40% were noted as H. nana + Hook worm + A. lumbricoid (n=11) 3.39%, E. histolytica + Hook worm + A. lumbricoid (n=5) 1.54%, T. trichura + H. nana +A. lumbricoides (n=2) 0.61%, E. vermicularis + H. nana +Hook worm (n=4) 1.23% and T. saginata + E. histolytica + E. vermicularis (n=1) 0.30%. The poly parasitism of 4 species (n=8) 2.46% were noted as H. nana + E. histolytica + A. lumbricoides+ Hook worm (n=4) 1.23%, E. vermicularis + H. nana + A. lumbricoides + Hook worm (n=3) 0.92% and T. saginata + H. nana +A. lumbricoides + T. trichura + (n=1) 0.30% was identified in the current study (Table 7).

Table 7
Poly parasitism of intestinal parasite infection in school going children of rural area of District Lower Dir, Pakistan.

4. Discussion

The most important intestinal parasites observed in both boys and girls A. lumbricoides, hookworm, T. trichura, H. nana, E. vermicularis, T. saginata and E. histolytica in our study. (82.0%) (n=324/266) were the total prevalence of the intestinal parasite in present study, our finding result were lower than the study lead by Khan et al. (2017c) which shows the total prevalence of IP were 83.1%. Other study directed from different country which shows different result study from Ethiopia which shows the total occurrence of IPIs was 28.0% (Alemnew et al., 2020). Chelkeba et al. (2020) described that the total occurrence of IPIs were 48% noted from Ethiopia while 12.4% prevalence of intestinal parasitic infection was reported from Karachi Pakistan by Arshad et al. (2019), 62.3% prevalence of IPIs were reported from Malakand region by Khan et al. (2019, 40% incidence of intestinal parasite infection were noted from Nepal by Gurung et al. (2019), 24.8% occurrence of IP were noted from Ombda by Elameen et al. (2019), from Malaysia by Rajeswari et al. (1994) noted 62.9% occurrence of intestinal parasite, 62.4% prevalence of IPIs reported from southeast Ethiopia by Sitotaw and Shiferaw (2020). The differences in results are due to the environmental locality, socio financial position and living habit of the study inhabitants.

A. lumbricoides were the most occurring intestinal parasite in the present study was in both boys and girls students, in boys student 58.09% (n=122) and girls student 57.01% (n=65) which was found to be higher than the study lead by Khan et al. (2017c) from Swat which shows 55.8% prevalence. From Ethiopia Sitotaw and Shiferaw (2020) reported 22.7% occurrence rate, 0.5% prevalence reported by Elameen et al. (2019) from Ombda, 86.3% occurrence of A. lumbricoides reported from Quetta Pakistan by Zahir et al. (2020), Alemnew et al. (2020) described 4.12% from Ethiopia, Arshad et al. (2019) reported 5.5% from Karachi, Khan et al. (2018); 7.76% reported from Swat, Feleke et al. (2019) reported 8.5%prevalence of A. lumbricoides from Ethiopia. The second most prevalent intestinal parasite in the present study was hookworm in both boys and girls students, in boys 41.90% (n=88) and girls student 38.59% (n=44). This finding report is higher than the study conducted by Khan et al. (2017c) in the food handler of Swat which shows 5.99% prevalence. Ullah et al. (2014) reported 54.50% prevalence from Upper Dir Pakistan. Gurung et al. (2019) from Nepal reported 3.85%, 20.6% from Ethiopia reported by Sitotaw and Shiferaw (2020); Arshad et al. (2019) reported 0.4% from Karachi, Khan et al. (2019a); noted 50.4% from Swat. The third most prevalent parasite in the present study was T. saginata which is present in both boys and girls. T. saginata was found 20.9% (n=44) in boys and Girls 21.0% (n=24). This finding is higher than the study conducted by Khan et al. (2017b) which shows 8.98% (n=24) prevalence which is lower than our study. In Pakistan the prevalence of T. saginata was reported in different places in Karachi Pakistan 0.4% reported by (Arshad et al., 2019); Zahir et al. (2020) described 4.5% from Quetta, Kosar et al. (2017) noted 0.7% from Punjab Pakistan, 0.5% reported from ombda by Elameen et al. (2019), Amuta et al. (2017) noted 3.6% from Nigeria. The fourth most prevalent intestinal parasite in both boys and girls student were recorded is E. vermicularis which shows the overall prevalence 14.8% (n=48) in the present study. In male student the prevalence of E. vermicularis was 15.2% (n=32) reported in girls student 14.0% (n=16). A study reported in Dir upper which shows the prevalence E. vermicularis was 1.3% which is much lower than the present study. The other most prevalent parasite in our study was T. trichura which are reported from both boys and girls students. In the boys the prevalence of T. trichura was reported is 11.9% (n=25) in girls students 19.2% (n=22). Different study conducted in Pakistan which shows varies prevalence ratio like Khan et al. (2017b) described 26.5% from Swat, Zahir et al. (2020) noted 9.0% from Quetta, Sitotaw and Shiferaw (2020) 7.6% reported from Ethiopia stated 6.67%, (Kosar et al., 2017) reported 1.3%, (Khan et al., 2018) reported 11.1%. Other parasite include H. nana was also reported in our study in both girls and boys student. The prevalence of H. nana was reported in boys student is 11.4% (n=24) and girls student 15.7% (n=18). The prevalence of H. nana is higher in girls student is compare to boy’s students. Arshad et al. (2019) reported 1.8%, Elameen et al. (2019) reported 6.7%, Sitotaw and Shiferaw (2020) 5.7% noted from Ethiopia (Khan et al., 2018) stated 2.77%.

In both of the gender most of the schoolchildren were contributed in age group 4 to 6 years trailed by 7 to 9 years, 10-12 and 13 to15 years of ages. In the current study 10-12 years age group students were found highly infected which shows (n=66) 94.2% with Intestinal parasite infection which is followed by the age group of 13 to 15 year which were (n=26) 92.8% then 7 to 9 year age group which was 84.4% (n=66) while (n=98) 72% the age group 4 to 6 years were having low level of infection. Age group 13 to 15 year student was found to be extremely uninfected (n=22) 78.5% which is trailed by the age group of 10 to 12 year which was (n=22) 22.8% than 7- 9 year age group which show (n=8) 8.88% while the 4 to 6 year age group were having low ratio of uninfected which show (n=12) 8.82% were noted in the current study.

Our result compare with the study conducted in Dir Upper which show that The age group 13-15 in male children show highest prevalence (93.75%) was reported which is followed by age group 4-6 years which show (83.33%) than show (81.82%) of the age group of 10-12 and age group 7-9 (80%) in female children. The highest infection, were observed in children with the age of 13-15 year which shows 88.89% (n=18), while the age group 10-12 year have low infection of parasite. Another study conducted by Siddig et al. (2017) which show that the age group of 5-7 year show 82.50% was more infected which is followed by 8-11 year which show 70.50% than 12-14 year age show 55.50% prevalence. Dudlova et al. (2016) reported that the maximum occurrence of protozoan infections 3.27% was found in the age group 8-18 year and helminthic infections 5.84% in the lowest rate of infection at the age of 1 month to 7 years. Elameen et al. (2019) reported that the 6-8 years age groups have highest prevalence rate (35%), while the 6-8 years age groups have lowest prevalence rate (10.3%) was reported.

On the basis of sex wise, the prevalence of parasitic infection in the male student 64.8% (n=210) was higher than female students which show 35.1% (n=114). This finding is compare with other study. Study conducted in Muzaffarabad which show 31.6% male and 26.5% female student prevalence (Chaudhry et al., 2004). Another study conducted by Golia et al. (2014) which show that 36.18% prevalence in male student and 13.20% prevalence were reported in female student in Bangalore. Females children were found more infected s compared to males (Khan et al., 2015); 18.9% reported in male and 20.7% in female; 58.5% reported in male and 80.3% prevalence reported in female (Rai et al., 2017); 27.56% in male and 33.90% reported the prevalence in female. The high prevalence in male student in our study due to playing habit in outside the home and works in soil field is compare to female students.

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Publication Dates

  • Publication in this collection
    06 Oct 2021
  • Date of issue
    2022

History

  • Received
    03 Sept 2020
  • Accepted
    16 Nov 2020
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