Last data update: May 06, 2024. (Total: 46732 publications since 2009)
Records 1-4 (of 4 Records) |
Query Trace: Cotte AH[original query] |
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School-based sero-surveys to assess the validity of using routine health facility data to target malaria interventions in the Central Highlands of Madagascar
Steinhardt L , Ravaoarisoa E , Wiegand R , Harimanana A , Hedje J , Cotte AH , Zigirumugabe S , Kesteman T , Rasoloharimanana TL , Rakotomalala E , Randriamoramanana AM , Rakotondramanga JM , Razanatsiorimalala S , Mercereau-Puijalon O , Perraut R , Ratsimbasoa A , Butts J , Rogier C , Piola P , Randrianarivelojosia M , Vigan-Womas I . J Infect Dis 2020 223 (6) 995-1004 BACKGROUND: In low-malaria-transmission areas of Madagascar, annual parasite incidence (API) from routine data has been used to target indoor residual spraying at sub-district commune levels. To assess validity of this approach, we conducted school-based serological surveys and health facility (HF) data quality assessments in seven districts to compare API to "gold-standard" commune-level serological measures. METHODS: At two primary schools in each of 93 communes, 60 students were randomly selected along with parents and teachers. Capillary blood was drawn for rapid diagnostic tests (RDTs) and serology. Multiplex bead-based immunoassays to detect antibodies to five Plasmodium falciparum antigens were conducted, and finite mixture models used to characterize seronegative and seropositive populations. Reversible catalytic models generated commune-level annual seroconversion rates (SCRs). HF register data were abstracted to assess completeness and accuracy. RESULTS: RDT positivity from 12,770 samples was 0.5%. Seroprevalence to tested antigens ranged from 17.9% (MSP-1) to 59.7% (PF13). Median commune-level SCR was 0.0108 (range: 0.001, 0.075). Compared to SCRs, API identified 71% (95% CI: 51%, 87%) of the 30% highest-transmission communes; sensitivity declined at lower levels. Routine data accuracy did not substantially affect API performance. CONCLUSIONS: API performs reasonably well at identifying higher-transmission communes, but sensitivity declined at lower transmission levels. |
Free mass distribution of long lasting insecticidal nets lead to high levels of LLIN access and use in Madagascar, 2010: A cross-sectional observational study
Finlay AM , Butts J , Ranaivoharimina H , Cotte AH , Ramarosandratana B , Rabarijaona H , Tuseo L , Chang M , Vanden Eng J . PLoS One 2017 12 (8) e0183936 BACKGROUND: Madagascar conducted the first two phases of a national free mass distribution campaign of long-lasting insecticidal nets (LLINs) during a political crisis in 2009 aiming to achieve coverage of two LLINs per household as part of the National Malaria Control Strategy. The campaign targeted households in 19 out of 91 total health districts. METHODS: A community-based cross-sectional household survey using a three-stage cluster sample design was conducted four months post campaign to assess LLIN ownership, access and use. Multivariable logistic regression analysis was used to identify factors associated with household LLIN access and individual LLIN use. RESULTS: A total of 2211 households were surveyed representing 8867 people. At least one LLIN was present in 93.5% (95% confidence interval [CI], 91.6-95.5%) of households and 74.8% (95% CI, 71.0-78.6%) owned at least two LLINs. Access measured as the proportion of the population that could potentially be covered by household-owned LLINs was 77.2% (77.2% (95% CI, 72.9-81.3%) and LLIN use by all individuals was 84.2% (95% CI, 81.2-87.2%). LLIN use was associated with knowledge of insecticide treated net use to prevent malaria (OR = 3.58, 95% CI, 1.85-6.94), household ownership of more LLINs (OR 2.82, 95% CI 1.85-4.3), presence of children under five (OR = 2.05, 95% CI, 1.67-2.51), having traveled to the distribution point and receiving information about hanging a bednet (OR = 1.56, 95% CI, 1.41-1.74), and having received a post-campaign visit by a community mobilizer (OR = 1.75, 95% CI, 1.26-2.43). Lower LLIN use was associated with increasing household size (OR = 0.81 95% CI 0.77-0.85) and number of sleeping spaces (OR = 0.55, 95% CI, 0.44-0.68). CONCLUSIONS: A large scale free mass LLIN distribution campaign was feasible and effective at achieving high LLIN access and use in Madagascar. Campaign process indicators highlighted potential areas for strengthening implementation to optimize access and equity. |
Improved equity in measles vaccination from integrating insecticide-treated bednets in a vaccination campaign, Madagascar
Goodson JL , Kulkarni MA , Vanden Eng JL , Wannemuehler KA , Cotte AH , Desrochers RE , Randriamanalina B , Luman ET . Trop Med Int Health 2012 17 (4) 430-7 OBJECTIVE: To evaluate the effect of integrating ITN distribution on measles vaccination campaign coverage in Madagascar. METHODS: Nationwide cross-sectional survey to estimate measles vaccination coverage, nationally, and in districts with and without ITN integration. To evaluate the effect of ITN integration, propensity score matching was used to create comparable samples in ITN and non-ITN districts. Relative risks (RR) and 95% confidence intervals (CI) were estimated via log-binomial models. Equity ratios, defined as the coverage ratio between the lowest and highest household wealth quintile (Q), were used to assess equity in measles vaccination coverage. RESULTS: National measles vaccination coverage during the campaign was 66.9% (95% CI 63.0-70.7). Among the propensity score subset, vaccination campaign coverage was higher in ITN districts (70.8%) than non-ITN districts (59.1%) (RR = 1.3, 95% CI 1.1-1.6). Among children in the poorest wealth quintile, vaccination coverage was higher in ITN than in non-ITN districts (Q1; RR = 2.4, 95% CI 1.2-4.8) and equity for measles vaccination was greater in ITN districts (equity ratio = 1.0, 95% CI 0.8-1.3) than in non-ITN districts (equity ratio = 0.4, 95% CI 0.2-0.8). CONCLUSION: Integration of ITN distribution with a vaccination campaign might improve measles vaccination coverage among the poor, thus providing protection for the most vulnerable and difficult to reach children. |
Contribution of integrated campaign distribution of long-lasting insecticidal nets to coverage of target groups and total populations in malaria-endemic areas in Madagascar
Kulkarni MA , Eng JV , Desrochers RE , Cotte AH , Goodson JL , Johnston A , Wolkon A , Erskine M , Berti P , Rakotoarisoa A , Ranaivo L , Peat J . Am J Trop Med Hyg 2010 82 (3) 420-425 In October 2007, Madagascar conducted a nationwide integrated campaign to deliver measles vaccination, mebendazole, and vitamin A to children six months to five years of age. In 59 of the 111 districts, long-lasting insecticidal nets (LLINs) were delivered to children less than five years of age in combination with the other interventions. A community-based, cross-sectional survey assessed LLIN ownership and use six months post-campaign during the rainy season. LLIN ownership was analyzed by wealth quintile to assess equity. In the 59 districts, 76.8% of households possessed at least one LLIN from any source and 56.4% of households possessed a campaign net. Equity of campaign net ownership was evident. Post-campaign, the LLIN use target of ≥ 80% by children less than five years of age and a high level of LLIN use (69%) by pregnant women were attained. Targeted LLIN distribution further contributed to total population coverage (60%) through use of campaign nets by all age groups. |
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