Prevalence and Factors Associated with Schistosomiasis in Ng'ombe Township of Lusaka Urban District.

Ng'andwe Kalungwana; David Mwakazanga; James Mwansa; Mable Mwale Mutengo; Seter Siziya

doi:10.53974/unza.jabs.1.1.329

Ng'andwe Kalungwana University of Zambia, School of Medicine, Department of Public Health, P.O. Box 50110, Lusaka, Zambia
David Mwakazanga Tropical Diseases Research Centre, P.O. Box 71769, Ndola, Zambia
James Mwansa University Teaching Hospital/ Bilharzia Control Programme, Private Bag R.W. 1X, Lusaka, Zambia
Mable Mwale Mutengo University Teaching Hospital/ Bilharzia Control Programme, Private Bag R.W. 1X, Lusaka, Zambia
Seter Siziya University of Zambia, School of Medicine, Department of Public Health, P.O. Box 50110, Lusaka, Zambia

DOI: https://doi.org/10.53974/unza.jabs.1.1.329

Keywords: Schistosomiasis, Schools, Ng'ombe, Lusaka, Zambia

Abstract

Background:The transmission cycle of schistosomiasis requires contamination of surface water by excreta, specific freshwater snails as intermediate hosts, and human water contact. The disease is a rural problem, but urban foci can be found in many endemic areas. The Zambian Ministry of Health (MOH) reports that schistosomiasis is highly prevalent in rural districts especially those close to the Lakes and rivers. Anecdotal evidence suggests that Ng'ombe Township is the hardest hit by schistosomiasis in Lusaka province of Zambia. Though a number of studies including national surveys have been done on schistosomiasis, no study on the factors associated with the disease in Ng'ombe Township has been documented. Materials and Methods: A Cross Sectional Exploratory survey was conducted to determine the prevalence and factors associated with schistosomiasis in five schools of Ng'ombe Township in Lusaka district where a total of 260 school-going children aged 8-14 years, attending grade three (3) to grade five (5) participated in the study. Results: No cases of S. mansoni were recorded in the five schools of Ng'ombe Township.However, the overall prevalence of S. haematobium infection was 13.1% (34/260). Age was significantly associated with infection. Compared with participants of age less than 10 years, participants aged 10-11 years and those aged 12 years or older were 5.17 (95% CI [1.62, 16.49]) and 14.96 (95% CI [2.52, 88.65]) times more likely to get infected, respectively. Children in grade five were 65% (AOR=0.35, 95% CI [0.02, 0.40]) less likely to have Schistosomiasis than those in grade three. Pupils whose source of water at school was a public water tap were 73% (AOR=0.27, 95% CI [0.09, 0.90]) less likely to have schistosomiasis than those that were using a communal hand pump at school. Conclusions:The study clearly documents the persistent schistosoma infestation in a peri-urban school age population.

References

1. Steinmann P, Keiser J, Bos R, Tanner M, Utzinger J. Schistosomiasis and water resources development:Systematic review, meta-analysis and estimates of people at risk.Lancet 2006; 6(7): 411-425.
2. Gryseels B, Polman K, Clerinx J, Kestens L. Human Schistosomiasis.Lancet 2006; 368(9541): 1106-1118.
3. Mwanakasale V, Siziya S, Mwansa J, Koukounari A, FenwickA.Impactofironsupplementationonschistosomiasis control in Zambian school children in ahighly endemic area.Malawi Medical Journal 2009; 21: 12-18.
4. World Health Organisation. Action Against Worms-Praziquantel dosepole.AvailablefromURL: , 2004.
5. ZambiaBilharziaControlProgramme2005-2007.Prevalence baseline status for Schistosomiasis and other soil transmitted helminthes in Zambia.Ministry Of Health, 2008.
6. Siziya S, Mushanga M, Sichilima W, Sukwa TY, Lengeler C, Sala-diakanda DM. The distribution of Schistosoma Haematobium in the Isoka district, Zambia; and a possible strategy for its control.Cenral African Journal of Medicine 1993; 39(2): 32-37.
7. Agnew-Blais J, Gropper A, Shilika E, Bail R, Ngoma M. Schistosomiasis haematobium prevalence and risk factors in a school-age population of peri-urban Lusaka, Zambia.Journal of Tropical Pediatrics 2010; 56: 247-253.
8. Simoonga C, Kazembe LN, Kristensen TK, Olsen A, Appleton CC, Mubita P, Mubila L. The epidemiology and small-scalespatialheterogeneityofUrinarySchistosomiasis in Lusaka province, Zambia.Geospatial Health 2008; 3(1): 57-67.
9. Central Statistics Office. Census of population and housing country report. CSO, Lusaka,2000.
10. Kapito-Tembo AP, Mwapasa V, Meshnick SR, Samanyika Y, Banda D, Bowie C, Radke S. Prevalence distribution and risk factors for Schistosoma haematobium infection among school children in Blantyre, Malawi.PLoS Neglected Tropical Diseases 2009; 3(1): e361.
11. Siziya S, Mushanga M. Importance of Schistosomiasis in the Isoka district of Zambia: Apre-requisite for its control usingcommunityparticipation.SocialScienceofMedicine 1996; 42(3): 431-435.
12. Samie A, Nchachi DJ, Obi CL, Igumbor EO. Prevalence and temporal distribution of schistosoma haematobium infections in the vhembe district, Limpopo province, South Africa.African Journal of Biotechnology 2010; 9(42): 7157-7164.
13. Katz N, Chaves A, Pellegrino JP. Asimple device for quantitativestoolthick-smeartechniqueinschistosomiasis mansoni. .Revista do Instituto de Medicina Tropical de São Paulo 1972; 14: 397-400.
14. Satayathum SA, Muchiri EM, Ouma JH, Whalem CC, King CH. Factors affecting infection or re-infection with Schistosoma haematobium in coastal Kenya: Survival analysis during a nine-year school-based treatment program.American Journal of Tropical Medicine and Hygiene 2006; 75(1): 83-92.
15. Firmo JOA, Lima e Costa MF, Guerra HL, Rocha RS. Urban Schistosomiasis: Morbidity, Sociodemographic characteristics and water contact patterns predictive of infection.International Journal of Epidemiology 1996; 25(6): 1292-1300.
16. Boatin BA, Dukes P, Wurapa FK. Parasitic infection in the Kasyasya cluster of villages in north-eastern Zambia.Medical Journal of Zambia 1984; 18: 2-7.
17. Opara KN, Udoidung NI, Ukpong IG. Genitourinary Schistosomiasis among pre-primary school children in a rural community within the cross river basin, Nigeria.Journal of Helminthology 2007; 81(4): 393-397.
18. OgbeideO,OkojieO,WagbatsomaV,IsahE.Schistosoma haematobium in rural school children in Nigeria.West African Journal of Medicine 1994; 13(1): 31-33.
19. Ndyomugyeni R, Minjas JN. Urinary Schistosomiasis in schoolchildren in Dar-es-Salaam, Tanzania, and factors influencing its transmission.Annals of Tropical Medicine and Parasitology 2001; 95: 697-706.JABS 2012; 1(1): 7-11.
20. King CH. Epidemiology of schistosomiasis: determinants of transmission of infection.In Mahmoud AAF, ed. Schistosomiasis. London: Imperial College Press, 2001: 115-132.
21. Edunga LD. Water utilization and its health implication in llorin, Kwara state Nigeria.Acta Tropica 1980; 37: 79-81.
22. Cairncross S, Blumenthal U, Kolsky P, Maores L, Tayeh A. The public and domestic domains in the transmission of the disease.Tropical Medicine and International Health 1996; 1: 27-34.
23. Watts S, Khallaayoune K, Bensefia R, Laamrani H, GryseelsB.Thestudyofhumanbehaviourandschistosomiasis transmission in an irrigated area in Morocco.Social Science and Medicine 1998; 46: 755-765.
24. Doehring E, Feldmeier H, Daffalla AA. Day-to-day variation and circadian rhythm of egg excretion in urinary schistosomiasis in the Sudan.Annals of Tropical Medicine and Parasitology 1983; 77: 587-594.
25. Warren KS, Siongok TK, Houser HB, Ouma JH, Peters PA.Quantificationofinfectionwithschistosomahaematobium in relation to epidemiology and selective population chemotherapy. I. minimal number of daily egg counts in urine necessary to establish intensity of infection. Journal of Infectious Diseases 1978; 138: 849-855.