An updated atlas of human helminth infections: the example of East Africa
Tóm tắt
Reliable and updated maps of helminth (worm) infection distributions are essential to target control strategies to those populations in greatest need. Although many surveys have been conducted in endemic countries, the data are rarely available in a form that is accessible to policy makers and the managers of public health programmes. This is especially true in sub-Saharan Africa, where empirical data are seldom in the public domain. In an attempt to address the paucity of geographical information on helminth risk, this article describes the development of an updated global atlas of human helminth infection, showing the example of East Africa. Empirical, cross-sectional estimates of infection prevalence conducted since 1980 were identified using electronic and manual search strategies of published and unpublished sources. A number of inclusion criteria were imposed for identified information, which was extracted into a standardized database. Details of survey population, diagnostic methods, sample size and numbers infected with schistosomes and soil-transmitted helminths were recorded. A unique identifier linked each record to an electronic copy of the source document, in portable document format. An attempt was made to identify the geographical location of each record using standardized geolocation procedures and the assembled data were incorporated into a geographical information system. At the time of writing, over 2,748 prevalence surveys were identified through multiple search strategies. Of these, 2,612 were able to be geolocated and mapped. More than half (58%) of included surveys were from grey literature or unpublished sources, underlining the importance of reviewing in-country sources. 66% of all surveys were conducted since 2000. Comprehensive, countrywide data are available for Burundi, Rwanda and Uganda. In contrast, information for Kenya and Tanzania is typically clustered in specific regions of the country, with few records from areas with very low population density and/or environmental conditions which are unfavourable for helminth transmission. Information is presented on the prevalence and geographical distribution for the major helminth species. For all five countries, the information assembled in the current atlas provides the most reliable, up-to-date and comprehensive source of data on the distribution of common helminth infections to guide the rational implementation of control efforts.
Tài liệu tham khảo
Muller R: Worms and human disease. 2002, Wallingford: CABI Publishing, 2
Brooker S, Bundy DAP: Soil-transmitted helminths (geohelminths). Manson's Tropical Diseases. Edited by: Cook GC, Zumla AI. 2008, London: Elsevier, 848-853. 22
Hotez PJ, Bundy DAP, Beegle K, Brooker S, Drake L, de Silva N, Montresor A, Engels D, Jukes M, Chitsulo L, Chow J, Laxminarayan R, Michaud C, Bethony J, Oliveira R, Xiao SH, Fenwick A, Savioli L: Helminth Infections: soil-transmitted helminth infections and schistosomiasis. Disease Control Priorities in Developing Countries. Edited by: Jamison DT, Breman J, Measham AR, Alleyne G, Claeson M, Evans DB, Jha P, Mills A, Musgrove P. 2006, New York: Oxford University Press, 467-497.
Keiser J, Utzinger J: Efficacy of current drugs against soil-transmitted helminth infections: systematic review and meta-analysis. JAMA. 2008, 299: 1937-1948.
Taylor-Robinson DC, Jones AP, Garner P: Deworming drugs for treating soil-transmitted intestinal worms in children: effects on growth and school performance. Cochrane Database Syst Rev. 2007, CD000371-
WHO: Prevention and control of schistosomiasis and soil-transmitted helminthiasis: report of a WHO expert committee. 2002, Geneva: World Health Organization
Doumenge JP, Mott KE, Cheung C, Villenave D, Chapuis O, Perrin MF, Read-Thomas G: Atlas of the global distribution of schistosomiasis. 1987, Geneva: World Health Organization
Highton RB: Schistosomiasis. Health and Disease in Kenya. Edited by: Vogel LC, Muller AS, Odingo RS, Onyango Z, De Geus A. 1974, Nairobi: East African Lterature Bureau, 347-355.
Hall SA, Langlands BW, Eds: Uganda atlas of disease distribution. 1975, Nairobi: East Africa Publishing House
Clements AC, Pfeiffer DU, Martin V, Otte MJ: A Rift Valley fever atlas for Africa. Prev Vet Med. 2007, 82: 72-82.
Clements AC, Pfeiffer DU, Otte MJ, Morteo K, Chen L: A global livestock production and health atlas (GLiPHA) for interactive presentation, integration and analysis of livestock data. Prev Vet Med. 2002, 56: 19-32.
Norstrom M: Geographical Information System (GIS) as a tool in surveillance and monitoring of animal diseases. Acta Vet Scand Suppl. 2001, 94: 79-85.
Randolph SE, Rogers DJ: Tick-borne Disease Systems: Mapping Geographic and Phylogenetic Space. Adv Parasitol. 2006, 62: 263-291.
Cecchi G, Paone M, Franco JR, Fevre EM, Diarra A, Ruiz JA, Mattioli RC, Simarro PP: Towards the Atlas of human African trypanosomiasis. Int J Health Geogr. 2009, 8: 15-
Blanton JD, Manangan A, Manangan J, Hanlon CA, Slate D, Rupprecht CE: Development of a GIS-based, real-time Internet mapping tool for rabies surveillance. Int J Health Geogr. 2006, 5: 47-
Hay SI, Guerra CA, Gething PW, Patil AP, Tatem AJ, Noor AM, Kabaria CW, Manh BH, Elyazar IR, Brooker S, Smith DL, Moyeed RA, Snow RW: A world malaria map: Plasmodium falciparum endemicity in 2007. PLoS Med. 2009, 6: e1000048-
Hay SI, Snow RW: The malaria Atlas Project: developing global maps of malaria risk. PLoS Med. 2006, 3: e473-
Brooker S, Rowlands M, Haller L, Savioli L, Bundy DA: Towards an atlas of human helminth infection in sub-Saharan Africa: the use of geographical information systems (GIS). Parasitol Today. 2000, 16: 303-307.
Schistosomiasis Control Initiative.http://www.sci-ntds.org/
Kabatereine NB, Fleming FM, Nyandindi U, Mwanza JC, Blair L: The control of schistosomiasis and soil-transmitted helminths in East Africa. Trends Parasitol. 2006, 22: 332-339.
The Global Network for Neglected Tropical Diseases.http://www.globalnetwork.org
Deworm the World.http://www.dewormtheworld.org
Brooker S, Kabatereine NB, Fleming F, Devlin N: Cost and cost-effectiveness of nationwide school-based helminth control in Uganda: intra-country variation and effects of scaling-up. Health Policy Plan. 2008, 23: 24-35.
Kabatereine NB, Brooker S, Koukounari A, Kazibwe F, Tukahebwa EM, Fleming FM, Zhang Y, Webster JP, Stothard JR, Fenwick A: Impact of a national helminth control programme on infection and morbidity in Ugandan schoolchildren. Bull World Health Organ. 2007, 85: 91-99.
Guyatt HL, Brooker S, Kihamia CM, Hall A, Bundy DA: Evaluation of efficacy of school-based anthelmintic treatments against anaemia in children in the United Republic of Tanzania. Bull World Health Organ. 2001, 79: 695-703.
Miguel EA, Kremer M: Worms: identifying impacts on education and health in the presence of treatment externalities. Econometrica. 2003, 72: 159-217.
Brooker S, Clements AC, Bundy DA: Global epidemiology, ecology and control of soil-transmitted helminth infections. Adv Parasitol. 2006, 62: 221-261.
Brooker S, Singhasivanon P, Waikagul J, Supavej S, Kojima S, Takeuchi T, Luong TV, Looareesuwan S: Mapping soil-transmitted helminths in Southeast Asia and implications for parasite control. Southeast Asian J Trop Med Public Health. 2003, 34: 24-36.
Anderson RM, May RM: Helminth infections of humans: mathematical models, population dynamics, and control. Adv Parasitol. 1985, 24: 1-101.
Guerra CA, Hay SI, Lucioparedes LS, Gikandi PW, Tatem AJ, Noor AM, Snow RW: Assembling a global database of malaria parasite prevalence for the Malaria Atlas Project. Malar J. 2007, 6: 17-
GeoNet Names Server.http://earth-info.nga.mil/gns/html/index.html
Alexandria Digital Library.http://middleware.alexandria.ucsb.edu/client/gaz/adl/index.jsp
Google Earth.http://earth.google.com
Wikipedia.http://en.wikipedia.org/wiki/Main_Page
Maplandia.http://www.maplandia.com
The Second Administrative Level Boundaries data set project.http://www.unsalb.org
Sturrock RF: Hookworm studies in Uganda: investigations at Teboke in Lango District. East Afr Med J. 1966, 43: 430-438.
Sturrock RF: Hookworm studies in Tanganyika (Tanzania): investigations at Hombolo in the Dodoma region. East Afr Med J. 1966, 43: 315-322.
Chunge RN, Karumba PN, Andala EO: Hookworm species in patients from Kenyatta National Hospital Nairobi. Ann Trop Med Parasitol. 1986, 80: 147-148.
Tatem AJ, Guerra CA, Kabaria CW, Noor AM, Hay SI: Human population, urban settlement patterns and their impact on Plasmodium falciparum malaria endemicity. Malar J. 2008, 7: 218-
Tatem AJ, Noor AM, von Hagen C, Di Gregorio A, Hay SI: High resolution population maps for low income nations: combining land cover and census in East Africa. PLoS ONE. 2007, 2: e1298-
Kabatereine NB, Brooker S, Tukahebwa EM, Kazibwe F, Onapa AW: Epidemiology and geography of Schistosoma mansoni in Uganda: implications for planning control. Trop Med Int Health. 2004, 9: 372-380.
Kabatereine NB, Tukahebwa EM, Kazibwe F, Twa-Twa JM, Barenzi JF, Zaramba S, Stothard JR, Fenwick A, Brooker S: Soil-transmitted helminthiasis in Uganda: epidemiology and cost of control. Trop Med Int Health. 2005, 10: 1187-1189.
de Vlas SJ, Gryseels B: Underestimation of Schistosoma mansoni prevalences. Parasitol Today. 1992, 8: 274-277.
Engels D, Sinzinkayo E, Gryseels B: Day-to-day egg count fluctuation in Schistosoma mansoni infection and its operational implications. Am J Trop Med Hyg. 1996, 54: 319-324.
Booth M, Vounatsou P, N'Goran EK, Tanner M, Utzinger J: The influence of sampling effort and the performance of the Kato-Katz technique in diagnosing Schistosoma mansoni and hookworm co-infections in rural Cote d'Ivoire. Parasitology. 2003, 127: 525-531.
Dacombe RJ, Crampin AC, Floyd S, Randall A, Ndhlovu R, Bickle Q, Fine PE: Time delays between patient and laboratory selectively affect accuracy of helminth diagnosis. Trans R Soc Trop Med Hyg. 2007, 101: 140-145.
Hatz C, Savioli L, Mayombana C, Dhunputh J, Kisumku UM, Tanner M: Measurement of schistosomiasis-related morbidity at community level in areas of different endemicity. Bull World Health Organ. 1990, 68: 777-787.
Brooker S, Kabatereine NB, Gyapong JO, Stothard JR, Utzinger J: Rapid mapping of schistosomiasis and other neglected tropical diseases in the context of integrated control programmes in Africa. Parasitology. 2009,
Brown DS, Jelnes JE, Kinoti GK, Ouma J: Distribution in Kenya of intermediate hosts for Schistosoma. Trop Geogr Med. 1981, 33 (2): 95-103.
Diesfeld HJ, Hecklau HK: Kenya: Regional Studies in Geographical Medicine. 1978, Berlin: Springer-Verlag
McCullough FS: The Distribution of Schistosoma mansoni and S. haematobium in East Africa. Trop Geogr Med. 1972, 24 (3): 199-207.
Nelson GSE: Schistosoma mansoni infection in the West-Nile district of Uganda. Part II. The distribution of S. mansoni with a note on the probable vectors. East Afr Med J. 1958, 35: 335-344.
Sturrock RF: The Influence of temperature on the biology of Biomphalaria pfeifferi (Krauss), an intermediate host of Schistosoma mansoni. Ann Trop Med Parasitol. 1966, 60: 100-105.
Rollinson D, Stothard JR, Southgate VR: Interactions between intermediate snail hosts of the genus Bulinus and schistosomes of the Schistosoma haematobium group. Parasitology. 2001, 123 (Suppl): S245-260.
Bradley DJ, Sturrock RF, Williams PN: The circumstantial epidemiology of Schistosoma haematobium in Lango district, Uganda. East Afr Med J. 1967, 44: 193-204.
Brooker S, Kabatereine NB, Tukahebwa EM, Kazibwe F: Spatial analysis of the distribution of intestinal nematode infections in Uganda. Epidemiol Infect. 2004, 132: 1065-1071.
Kabatereine NB, Kemijumbi J, Kazibwe F, Onapa AW: Human intestinal parasites in primary school children in Kampala, Uganda. East Afr Med J. 1997, 74: 311-314.
Kabaterine NB, Kazibwe F, Kemijumbi J: Epidemiology of schistosomiasis in Kampala, Uganda. East Afr Med J. 1996, 73: 795-800.
Noor AM, Alegana VA, Gething PW, Snow RW: A spatial national health facility database for public health sector planning in Kenya in 2008. Int J Health Geogr. 2009, 8: 13-
Ministry of Education: Inception Report. Consultancy on development of a GIS database of learning institutions (School mapping exercise). 2008, Nairobi: Oakar Services Ltd
Diggle PJ, Tawn JA, Moyeed R: Model-based statistics. J Roy Statistical Soc, C. 1998, 47: 299-326.
Clements AC, Lwambo NJ, Blair L, Nyandindi U, Kaatano G, Kinung'hi S, Webster JP, Fenwick A, Brooker S: Bayesian spatial analysis and disease mapping: tools to enhance planning and implementation of a schistosomiasis control programme in Tanzania. Trop Med Int Health. 2006, 11: 490-503.
Raso G, Matthys B, N'Goran EK, Tanner M, Vounatsou P, Utzinger J: Spatial risk prediction and mapping of Schistosoma mansoni infections among schoolchildren living in western Cote d'Ivoire. Parasitology. 2005, 131: 97-108.
Raso G, Vounatsou P, Gosoniu L, Tanner M, N'Goran EK, Utzinger J: Risk factors and spatial patterns of hookworm infection among schoolchildren in a rural area of western Cote d'Ivoire. Int J Parasitol. 2006, 36: 201-210.
Brooker S, Clements AC: Spatial heterogeneity of parasite co-infection: Determinants and geostatistical prediction at regional scales. Int J Parasitol. 2009, 39: 591-597.
Clements AC, Bosque-Oliva E, Sacko M, Landoure A, Dembele R, Traore M, Coulibaly G, Gabrielli AF, Fenwick A, Brooker S: A comparative study of the spatial distribution of schistosomiasis in mali in 1984–1989 and 2004–2006. PLoS Negl Trop Dis. 2009, 3: e431-
Clements AC, Garba A, Sacko M, Toure S, Dembele R, Landoure A, Bosque-Oliva E, Gabrielli AF, Fenwick A: Mapping the probability of schistosomiasis and associated uncertainty, West Africa. Emerg Infect Dis. 2008, 14: 1629-1632.