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Associations of peak shifts in age-prevalence for human malarias with bednet coverage
Effects of bednet coverage (C) on prevalence of malaria were analysed using data from 1990–1992 from 9 Papua New Guinean villages. Effects of coverage varied by age, resulting in a shift in age of peak prevalence from 4 · 7 (C = 0%) to 11 · 6 (C = 100%) years for Plasmodium falciparum, from 3 · 4 to...
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| Published in: | Transactions of the Royal Society of Tropical Medicine and Hygiene 2001, Vol.95 (1), p.1-6 |
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| creator | Smith, T. Hii, J.L.K. Genton, B. Müller, I. Booth, M. Gibson, N. Narara, A. Alpers, M.P. |
| description | Effects of bednet coverage (C) on prevalence of malaria were analysed using data from 1990–1992 from 9 Papua New Guinean villages. Effects of coverage varied by age, resulting in a shift in age of peak prevalence from 4 · 7 (C = 0%) to 11 · 6 (C = 100%) years for
Plasmodium falciparum, from 3 · 4 to 4 · 9 years for
P. vivax and from 11 · 0 to 16 · 8 years for
P. malariae. In small areas with no bednets the age distribution of
P. falciparum parasitaemia was like that of a holoendemic area. Where coverage was complete the pattern corresponded to mesoendemicity. Thus, protracted use of bednets can result in profound changes in the endemicity of malaria even when coverage is incomplete and without insecticide treatment. Average entomological inoculation rates (EIRs) estimated from indoor landing rates on individuals without bednets were 35, 12 and 10 infectious bites per person per annum for
P. Falciparum,
P. vivax and
P. malariae, respectively. Logistic regression analyses indicated that the EIR estimate for
P. falciparum was related to prevalence of this species independently of effects of bednet coverage. However, the recent EIR still accounted for much less variation than did the bednets. A similar pattern was seen for
P. malariae, while there were no significant relationships between the recent EIR and the parasite positivity for
P. vivax. It is concluded that short-term variations in inoculation rate are not important determinants of parasite prevalence in this population. |
| doi_str_mv | 10.1016/S0035-9203(01)90314-1 |
| format | article |
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Plasmodium falciparum, from 3 · 4 to 4 · 9 years for
P. vivax and from 11 · 0 to 16 · 8 years for
P. malariae. In small areas with no bednets the age distribution of
P. falciparum parasitaemia was like that of a holoendemic area. Where coverage was complete the pattern corresponded to mesoendemicity. Thus, protracted use of bednets can result in profound changes in the endemicity of malaria even when coverage is incomplete and without insecticide treatment. Average entomological inoculation rates (EIRs) estimated from indoor landing rates on individuals without bednets were 35, 12 and 10 infectious bites per person per annum for
P. Falciparum,
P. vivax and
P. malariae, respectively. Logistic regression analyses indicated that the EIR estimate for
P. falciparum was related to prevalence of this species independently of effects of bednet coverage. However, the recent EIR still accounted for much less variation than did the bednets. A similar pattern was seen for
P. malariae, while there were no significant relationships between the recent EIR and the parasite positivity for
P. vivax. It is concluded that short-term variations in inoculation rate are not important determinants of parasite prevalence in this population.</description><identifier>ISSN: 0035-9203</identifier><identifier>EISSN: 1878-3503</identifier><identifier>DOI: 10.1016/S0035-9203(01)90314-1</identifier><identifier>PMID: 11280051</identifier><identifier>CODEN: TRSTAZ</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Adolescent ; age ; Age Distribution ; Animals ; Bedding and Linens ; bednets ; Biological and medical sciences ; Child ; Child, Preschool ; endemicity ; entomological inoculation rates ; Enzyme-Linked Immunosorbent Assay ; Human protozoal diseases ; Humans ; Infectious diseases ; Logistic Models ; Malaria ; Malaria - epidemiology ; Malaria - prevention & control ; Malaria, Falciparum - epidemiology ; Malaria, Falciparum - prevention & control ; Malaria, Vivax - epidemiology ; Malaria, Vivax - prevention & control ; Medical sciences ; Mosquito Control - methods ; Papua New Guinea ; Papua New Guinea - epidemiology ; Parasitic diseases ; Plasmodium falciparum ; Plasmodium malariae ; Plasmodium vivax ; Prevalence ; Protozoal diseases ; Tropical medicine</subject><ispartof>Transactions of the Royal Society of Tropical Medicine and Hygiene, 2001, Vol.95 (1), p.1-6</ispartof><rights>2001</rights><rights>2001 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c474t-cd5a4f3e095ef6f725720909519c83b70a39b6637a97e6dc4d5679a8598e5ef03</citedby><cites>FETCH-LOGICAL-c474t-cd5a4f3e095ef6f725720909519c83b70a39b6637a97e6dc4d5679a8598e5ef03</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4023,27922,27923,27924</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=977179$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11280051$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Smith, T.</creatorcontrib><creatorcontrib>Hii, J.L.K.</creatorcontrib><creatorcontrib>Genton, B.</creatorcontrib><creatorcontrib>Müller, I.</creatorcontrib><creatorcontrib>Booth, M.</creatorcontrib><creatorcontrib>Gibson, N.</creatorcontrib><creatorcontrib>Narara, A.</creatorcontrib><creatorcontrib>Alpers, M.P.</creatorcontrib><title>Associations of peak shifts in age-prevalence for human malarias with bednet coverage</title><title>Transactions of the Royal Society of Tropical Medicine and Hygiene</title><addtitle>Trans R Soc Trop Med Hyg</addtitle><description>Effects of bednet coverage (C) on prevalence of malaria were analysed using data from 1990–1992 from 9 Papua New Guinean villages. Effects of coverage varied by age, resulting in a shift in age of peak prevalence from 4 · 7 (C = 0%) to 11 · 6 (C = 100%) years for
Plasmodium falciparum, from 3 · 4 to 4 · 9 years for
P. vivax and from 11 · 0 to 16 · 8 years for
P. malariae. In small areas with no bednets the age distribution of
P. falciparum parasitaemia was like that of a holoendemic area. Where coverage was complete the pattern corresponded to mesoendemicity. Thus, protracted use of bednets can result in profound changes in the endemicity of malaria even when coverage is incomplete and without insecticide treatment. Average entomological inoculation rates (EIRs) estimated from indoor landing rates on individuals without bednets were 35, 12 and 10 infectious bites per person per annum for
P. Falciparum,
P. vivax and
P. malariae, respectively. Logistic regression analyses indicated that the EIR estimate for
P. falciparum was related to prevalence of this species independently of effects of bednet coverage. However, the recent EIR still accounted for much less variation than did the bednets. A similar pattern was seen for
P. malariae, while there were no significant relationships between the recent EIR and the parasite positivity for
P. vivax. It is concluded that short-term variations in inoculation rate are not important determinants of parasite prevalence in this population.</description><subject>Adolescent</subject><subject>age</subject><subject>Age Distribution</subject><subject>Animals</subject><subject>Bedding and Linens</subject><subject>bednets</subject><subject>Biological and medical sciences</subject><subject>Child</subject><subject>Child, Preschool</subject><subject>endemicity</subject><subject>entomological inoculation rates</subject><subject>Enzyme-Linked Immunosorbent Assay</subject><subject>Human protozoal diseases</subject><subject>Humans</subject><subject>Infectious diseases</subject><subject>Logistic Models</subject><subject>Malaria</subject><subject>Malaria - epidemiology</subject><subject>Malaria - prevention & control</subject><subject>Malaria, Falciparum - epidemiology</subject><subject>Malaria, Falciparum - prevention & control</subject><subject>Malaria, Vivax - epidemiology</subject><subject>Malaria, Vivax - prevention & control</subject><subject>Medical sciences</subject><subject>Mosquito Control - methods</subject><subject>Papua New Guinea</subject><subject>Papua New Guinea - epidemiology</subject><subject>Parasitic diseases</subject><subject>Plasmodium falciparum</subject><subject>Plasmodium malariae</subject><subject>Plasmodium vivax</subject><subject>Prevalence</subject><subject>Protozoal diseases</subject><subject>Tropical medicine</subject><issn>0035-9203</issn><issn>1878-3503</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNqFkU1vEzEQhi1ERUPhJ4AsISE4bJlZr9frE6oiSkCROEAlxMWaeGeJ6X4Ee5PCv2fTROHYkzXy886MnhHiBcIlApbvvgIondkc1BvAtxYUFhk-EjOsTJUpDeqxmJ2Qc_E0pV8AuUZtn4hzxLwC0DgTN1cpDT7QGIY-yaGRG6ZbmdahGZMMvaSfnG0i76jl3rNshijX24562VFLMVCSd2FcyxXXPY_SDzuOU-SZOGuoTfz8-F6Im-sP3-aLbPnl46f51TLzhSnGzNeaikYxWM1N2ZhcmxzsVKH1lVoZIGVXZakMWcNl7Ytal8ZSpW3FUwLUhXh96LuJw-8tp9F1IXluW-p52CZnDGCBCidQH0Afh5QiN24TQ0fxr0Nwe5_u3qfby3KA7t6n2-deHgdsVx3X_1NHgRPw6ghQ8tQ2kXof0omzxqCxE5UdqJBG_nP6pXjrSqOMdovvP9z1HJafFzk6M_HvDzxP8naBo0s-7A9Qh8h-dPUQHlj8H33-n7o</recordid><startdate>2001</startdate><enddate>2001</enddate><creator>Smith, T.</creator><creator>Hii, J.L.K.</creator><creator>Genton, B.</creator><creator>Müller, I.</creator><creator>Booth, M.</creator><creator>Gibson, N.</creator><creator>Narara, A.</creator><creator>Alpers, M.P.</creator><general>Elsevier Ltd</general><general>Royal Society of Tropical Medicine and Hygiene</general><general>Elsevier</general><scope>BSCLL</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>2001</creationdate><title>Associations of peak shifts in age-prevalence for human malarias with bednet coverage</title><author>Smith, T. ; Hii, J.L.K. ; Genton, B. ; Müller, I. ; Booth, M. ; Gibson, N. ; Narara, A. ; Alpers, M.P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c474t-cd5a4f3e095ef6f725720909519c83b70a39b6637a97e6dc4d5679a8598e5ef03</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><topic>Adolescent</topic><topic>age</topic><topic>Age Distribution</topic><topic>Animals</topic><topic>Bedding and Linens</topic><topic>bednets</topic><topic>Biological and medical sciences</topic><topic>Child</topic><topic>Child, Preschool</topic><topic>endemicity</topic><topic>entomological inoculation rates</topic><topic>Enzyme-Linked Immunosorbent Assay</topic><topic>Human protozoal diseases</topic><topic>Humans</topic><topic>Infectious diseases</topic><topic>Logistic Models</topic><topic>Malaria</topic><topic>Malaria - epidemiology</topic><topic>Malaria - prevention & control</topic><topic>Malaria, Falciparum - epidemiology</topic><topic>Malaria, Falciparum - prevention & control</topic><topic>Malaria, Vivax - epidemiology</topic><topic>Malaria, Vivax - prevention & control</topic><topic>Medical sciences</topic><topic>Mosquito Control - methods</topic><topic>Papua New Guinea</topic><topic>Papua New Guinea - epidemiology</topic><topic>Parasitic diseases</topic><topic>Plasmodium falciparum</topic><topic>Plasmodium malariae</topic><topic>Plasmodium vivax</topic><topic>Prevalence</topic><topic>Protozoal diseases</topic><topic>Tropical medicine</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Smith, T.</creatorcontrib><creatorcontrib>Hii, J.L.K.</creatorcontrib><creatorcontrib>Genton, B.</creatorcontrib><creatorcontrib>Müller, I.</creatorcontrib><creatorcontrib>Booth, M.</creatorcontrib><creatorcontrib>Gibson, N.</creatorcontrib><creatorcontrib>Narara, A.</creatorcontrib><creatorcontrib>Alpers, M.P.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Transactions of the Royal Society of Tropical Medicine and Hygiene</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Smith, T.</au><au>Hii, J.L.K.</au><au>Genton, B.</au><au>Müller, I.</au><au>Booth, M.</au><au>Gibson, N.</au><au>Narara, A.</au><au>Alpers, M.P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Associations of peak shifts in age-prevalence for human malarias with bednet coverage</atitle><jtitle>Transactions of the Royal Society of Tropical Medicine and Hygiene</jtitle><addtitle>Trans R Soc Trop Med Hyg</addtitle><date>2001</date><risdate>2001</risdate><volume>95</volume><issue>1</issue><spage>1</spage><epage>6</epage><pages>1-6</pages><issn>0035-9203</issn><eissn>1878-3503</eissn><coden>TRSTAZ</coden><abstract>Effects of bednet coverage (C) on prevalence of malaria were analysed using data from 1990–1992 from 9 Papua New Guinean villages. Effects of coverage varied by age, resulting in a shift in age of peak prevalence from 4 · 7 (C = 0%) to 11 · 6 (C = 100%) years for
Plasmodium falciparum, from 3 · 4 to 4 · 9 years for
P. vivax and from 11 · 0 to 16 · 8 years for
P. malariae. In small areas with no bednets the age distribution of
P. falciparum parasitaemia was like that of a holoendemic area. Where coverage was complete the pattern corresponded to mesoendemicity. Thus, protracted use of bednets can result in profound changes in the endemicity of malaria even when coverage is incomplete and without insecticide treatment. Average entomological inoculation rates (EIRs) estimated from indoor landing rates on individuals without bednets were 35, 12 and 10 infectious bites per person per annum for
P. Falciparum,
P. vivax and
P. malariae, respectively. Logistic regression analyses indicated that the EIR estimate for
P. falciparum was related to prevalence of this species independently of effects of bednet coverage. However, the recent EIR still accounted for much less variation than did the bednets. A similar pattern was seen for
P. malariae, while there were no significant relationships between the recent EIR and the parasite positivity for
P. vivax. It is concluded that short-term variations in inoculation rate are not important determinants of parasite prevalence in this population.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>11280051</pmid><doi>10.1016/S0035-9203(01)90314-1</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| source | Oxford Journals Online |
| subjects | Adolescent age Age Distribution Animals Bedding and Linens bednets Biological and medical sciences Child Child, Preschool endemicity entomological inoculation rates Enzyme-Linked Immunosorbent Assay Human protozoal diseases Humans Infectious diseases Logistic Models Malaria Malaria - epidemiology Malaria - prevention & control Malaria, Falciparum - epidemiology Malaria, Falciparum - prevention & control Malaria, Vivax - epidemiology Malaria, Vivax - prevention & control Medical sciences Mosquito Control - methods Papua New Guinea Papua New Guinea - epidemiology Parasitic diseases Plasmodium falciparum Plasmodium malariae Plasmodium vivax Prevalence Protozoal diseases Tropical medicine |
| title | Associations of peak shifts in age-prevalence for human malarias with bednet coverage |
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