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Incidence of cassava mosaic disease and associated whitefly vectors in South West and North Central Nigeria: Data exploration.

ABSTRACT: Cassava mosaic disease (CMD) is one of the most economically important viral diseases of cassava, an important staple food for over 800 million people in the tropics. Although several Cassava mosaic virus species associated with CMD have been isolated and characterized over the years, several new super virulent strains of these viruses have evolved due to genetic recombination between diverse species. In this data article, field survey data collected from 184 cassava farms in 12 South Western and North Central States of Nigeria in 2015 are presented and extensively explored. In each State, one cassava farm was randomly selected as the first farm and subsequent farms were selected at 10?km intervals, except in locations were cassava farms are sporadically located. In each selected farm, 30 cassava plants were sampled along two diagonals and all selected plant was scored for the presence or absence of CMD symptoms. Cassava mosaic disease incidence and associated whitefly vectors in South West and North Central Nigeria are explored using relevant descriptive statistics, box plots, bar charts, line graphs, and pie charts. In addition, correlation analysis, Analysis of Variance (ANOVA), and multiple comparison post-hoc tests are performed to understand the relationship between the numbers of whiteflies counted, uninfected farms, infected farms, and the mean of symptom severity in and across the States under investigation. The data exploration provided in this data article is considered adequate for objective assessment of the incidence and symptom severity of cassava mosaic disease and associated whitefly vectors in farmers' fields in these parts of Nigeria where cassava is heavily cultivated.

SUBMITTER: Eni AO

PROVIDER: S-EPMC5993015 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

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Incidence of cassava mosaic disease and associated whitefly vectors in South West and North Central Nigeria: Data exploration.

Eni Angela O AO Efekemo Oghenevwairhe P OP Soluade Mojisola G MG Popoola Segun I SI Atayero Aderemi A AA

Data in brief 20180519

Cassava mosaic disease (CMD) is one of the most economically important viral diseases of cassava, an important staple food for over 800 million people in the tropics. Although several <i>Cassava mosaic virus</i> species associated with CMD have been isolated and characterized over the years, several new super virulent strains of these viruses have evolved due to genetic recombination between diverse species. In this data article, field survey data collected from 184 cassava farms in 12 South Wes ...[more]

PMID: 29892658

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Project description:This study was conducted to assess the impact of the eye care programme on cataract blindness and cataract surgical services in Sokoto, Nigeria over a 12 year period 2005-2016.Data from the 2005 population based cross-sectional study of blindness in Sokoto state was re-analysed to obtain baseline estimates of the prevalence of cataract blindness and cataract surgical coverage for persons 50 years and over in Wurno health zone. A population based survey of a representative sample of persons 50 years and over in Wurno health zone was conducted in July 2016. Data on eye health workforce, infrastructure and cataract surgical services between 2005 and 2016 were analysed from relevant documents.In 2005 the unadjusted prevalence of bilateral cataract blindness (<3/60) in people 50 years and over in Wurno health zone was 5.6% (95% CI: 3.1, 10.1). By 2016 this had fallen to 2.1% (95% CI 1.5%, 2.7%), with the age-sex adjusted prevalence being 1.9% (95% CI 1.3%, 2.5%). The CSC for persons with visual acuity <3/60, <6/60, <6/18 for Wurno health zone was 9.1%, 7.1% and 5.5% respectively in 2005 and this had increased to 67.3%, 62.1% and 34.7% respectively in 2016. The CSR in Sokoto state increased from 272 (1005 operations) in 2006, to 596 (2799 operations) in 2014. In the 2005 survey, couching (a procedure used by traditional practitioners to dislocate the lens into the vitreous cavity) accounted for 87.5% of all cataract interventions, compared to 45.8% in the 2016 survey participants. In 2016 18% of eyes having a cataract operation with IOL implantation had a presenting visual acuity of <6/60 (poor outcome) with the main causes being postoperative complications (53%) and uncorrected refractive error (29%).Between 2005 and 2016 there was a doubling in cataract surgical rate, a 7 times increase in cataract surgical coverage (<3/60), and a decrease in cataract blindness and the proportion of eyes being couched. However, there remains a high prevalence of un-operated cataract in 2016 indicating a need to further improve access to affordable and good quality cataract surgical services.

Project description:BackgroundIn much of sub-Saharan Africa, male partners play influential roles in women's access to maternal-child healthcare, including prevention of mother-to-child transmission of HIV services. We explored male partner perspectives on women's access to maternal-child healthcare in North-Central Nigeria.MethodsThree focus groups were conducted with 30 men, purposefully-selected on the basis of being married, and rural or urban residence. Major themes explored were men's maternal-child health knowledge, gender power dynamics in women's access to healthcare, and peer support for pregnant and postpartum women. Data were manually analyzed using Grounded Theory, which involves constructing theories out of data collected, rather than applying pre-formed theories.ResultsMean participant age was 48.3 years, with 36.7% aged <40 years, 46.7% between 41 and 60 years, and 16.6% over 60 years old. Religious affiliation was self-reported; 60% of participants were Muslim and 40% were Christian. There was consensus on the acceptability of maternal-child health services and their importance for optimal maternal-infant outcomes. Citing underlying patriarchal norms, participants acknowledged that men had more influence in family health decision-making than women. However, positive interpersonal couple relationships were thought to facilitate equitable decision-making among couples. Financial constraints, male-unfriendly clinics and poor healthcare worker attitudes were major barriers to women's access and male partner involvement. The provision of psychosocial and maternal peer support from trained women was deemed highly acceptable for both HIV-positive and HIV-negative women.ConclusionsStrategic engagement of community leaders, including traditional and religious leaders, is needed to address harmful norms and practices underlying gender inequity in health decision-making. Gender mainstreaming, where the needs and concerns of both men and women are considered, should be applied in maternal-child healthcare education and delivery. Clinic fee reductions or elimination can facilitate service access. Finally, professional organizations can do more to reinforce respectful maternity care among healthcare workers.

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Incidence of cassava mosaic disease and associated whitefly vectors in South West and North Central Nigeria: Data exploration.

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Incidence of cassava mosaic disease and associated whitefly vectors in South West and North Central Nigeria: Data exploration.

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