Lymphatic filariasis in Papua New Guinea: distribution at district level and impact of mass drug administration, 1980 to 2011 View Full Text


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Article Info

DATE

2013-01-11

AUTHORS

Patricia M Graves, Leo Makita, Melinda Susapu, Molly A Brady, Wayne Melrose, Corinne Capuano, Zaixing Zhang, Luo Dapeng, Masayo Ozaki, David Reeve, Kazuyo Ichimori, Walter M Kazadi, Frederick Michna, Moses J Bockarie, Louise A Kelly-Hope

ABSTRACT

BackgroundLymphatic filariasis (LF) caused by Wuchereria bancrofti is present at high prevalence in some parts of Papua New Guinea. However, there has been no rigorous data-based representative assessment of nationwide prevalence of LF. The LF programme has been daunted by the scope of the problem, and progress on mass drug administration (MDA) has been slow and lacking in resources.MethodsA systematic literature review identified LF surveys in Papua New Guinea between 1980 and 2011. Results were extracted by location, time period and test used (blood slide, immunochromatographic test (ICT) or Og4C3 ELISA) and combined by district. Three criteria schemes based on the Global Programme to Eliminate Lymphatic Filariasis guidelines, with modifications, were developed to classify and prioritize districts by prevalence level. Results of repeated surveys in the same sites were used to investigate the impact of MDA on LF prevalence over the time period.ResultsThere were 312 distinct survey sites identified in 80 of the 89 districts over the 31-year period. The overall LF prevalence in the sites tested was estimated at 18.5 to 27.5% by blood slide for microfilariae (Mf), 10.1% to 12.9% by ICT and 45.4% to 48.8% by Og4C3. Biases in site selection towards areas with LF, and change in type of assay used, affected the prevalence estimates, but overall decline in prevalence over the time period was observed. Depending on the criteria used, 34 to 36 districts (population 2.7 to 2.9 million) were classed as high endemic (≥5% prevalence), 15 to 25 districts (1.7 to 1.9 million) as low endemic (<5%) and 20 to 31 (1.3 to 2.2 million) as non-endemic. Nine districts (0.7 million) had no information. The strong impact of MDA, especially on microfilaria (Mf) prevalence, was noted in sites with repeat surveys.ConclusionsThis analytical review of past surveys of LF in Papua New Guinea enables better estimation of the national burden, identifies gaps in knowledge, quantifies and locates the population at risk, and can be used to predict the likely impact of MDA and/or vector control. Better targeting of districts by level of prevalence will strengthen the control programme, facilitate monitoring of the disease trend and increase the likelihood of reaching the target of LF elimination by 2020. More... »

PAGES

7

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1756-3305-6-7

DOI

http://dx.doi.org/10.1186/1756-3305-6-7

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1028305716

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/23311302


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38 ResultsThere
39 Wuchereria bancrofti
40 administration
41 analytical review
42 area
43 assessment
44 bancrofti
45 better estimation
46 biases
47 blood slides
48 burden
49 changes
50 control
51 control programs
52 criteria
53 criteria scheme
54 decline
55 disease trends
56 distribution
57 district
58 district level
59 elimination
60 estimates
61 estimation
62 facilitate monitoring
63 filariasis
64 gap
65 guidelines
66 high prevalence
67 identifies gaps
68 impact
69 impact of MDA
70 information
71 knowledge
72 level of prevalence
73 levels
74 likelihood
75 likely impact
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77 location
78 lymphatic filariasis
79 mass drug administration
80 microfilaria prevalence
81 microfilariae
82 modification
83 monitoring
84 national burden
85 nationwide prevalence
86 overall decline
87 part
88 past surveys
89 period
90 population
91 prevalence
92 prevalence estimates
93 prevalence levels
94 problem
95 program
96 quantifies
97 repeat survey
98 representative assessment
99 resources
100 results
101 review
102 risk
103 same site
104 scheme
105 scope
106 selection
107 site selection
108 sites
109 slides
110 strong impact
111 survey
112 survey sites
113 systematic literature review
114 target
115 targeting
116 test
117 time period
118 trends
119 types
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