The new WHO guideline for control and elimination of human schistosomiasis: implications for the Schistosomiasis Elimination Programme in Nigeria.

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Supplementary Information: The online version contains supplementary material available at 10.1186/s40249-022-01034-3.

Integrated transmission assessment surveys (iTAS) of lymphatic filariasis and onchocerciasis in Cross River, Taraba and Yobe States, Nigeria.

Background: Integrated transmission assessment surveys (iTAS) have been recommended for evaluation of the transmission of both lymphatic filariasis (LF) and onchocerciasis as the prevalence of both diseases moves toward their respective elimination targets in Nigeria. Therefore, we conducted an iTAS between May and December 2017 in five local government areas (LGAs), also known as implementation units (IUs), in states of Cross River, Taraba and Yobe in Nigeria.

Methods: The TAS comprised two phases: the Pre-iTAS and the iTAS itself.

Community-directed distributors-The "foot soldiers" in the fight to control and eliminate neglected tropical diseases.

The neglected tropical diseases (NTDs) affect hundreds of millions of people, predominantly in rural, often difficult-to-access areas, poorly served by national health services. Here, we review the contributions of 4.8 million community-directed distributors (CDDs) of medicines over 2 decades in 146,000 communities in 27 sub-Saharan African countries to control or eliminate onchocerciasis and lymphatic filariasis (LF).

Onchocerciasis control in Ghana (1974-2016).

Background: The control of onchocerciasis in Ghana started in 1974 under the auspices of the Onchocerciasis Control Programme (OCP). Between 1974 and 2002, a combination of approaches including vector control, mobile community ivermectin treatment, and community-directed treatment with ivermectin (CDTI) were employed. From 1997, CDTI became the main control strategy employed by the Ghana OCP (GOCP).

Social innovation for health: engaging communities to address infectious diseases.

Universal health coverage emphasises the value of the community-based delivery of health services to ensure that underserved populations have access to care. In areas where infectious diseases are endemic, there are often few resources and limited capacity, and the introduction of effective and accessible strategies require innovation. In this special issue, the contributing authors emphasise the power of local responses to the circumstances that underpin diseases of poverty, and highlight the methodological and programme innovations necessary to support and sustain these responses.

The need for evidence-based strategies and tools for onchocerciasis elimination in Africa.

In a recent article we discussed the feasibility of onchocerciasis elimination in Africa by 2025. We expressed concern that elimination may be impeded by failure to build on the lessons learned in the African onchocerciasis control programmes and the introduction of strategies and tools from the Americas. Richards et al.

Is onchocerciasis elimination in Africa feasible by 2025: a perspective based on lessons learnt from the African control programmes.

Background: Onchocerciasis is found predominantly in Africa where large scale vector control started in 1974. Registration and donation of ivermectin by Merck & Co in 1987 enabled mass treatment with ivermectin in all endemic countries in Africa and the Americas. Although elimination of onchocerciasis with ivermectin was considered feasible only in the Americas, recently it has been shown possible in Africa too, necessitating fundamental changes in technical and operational approaches and procedures.

Nutritional value of school meals and their contributions to energy and nutrient intakes of rural school children in Enugu and Anambra States, Nigeria.

Background: Nutritional deficiencies among school children may hinge on inadequate nutrient intake. School meals should improve nutrient intakes by providing a third of recommended daily energy and nutrient intakes (RNI). The study aimed at evaluating school meals served in three rural schools to determine if they met one third of the RNI of the children.

Perception and utilization of public health services in Southeast Nigeria: Implication for health care in communities with different degrees of urbanization.

Background: The relationship between people's perception and utilization of public health services was investigated.

Methods: A survey of 840 households across selected urban, peri urban and rural communities, in the Southeast of Nigeria, was conducted using the mixed methods approach.

Results: Of the nine (9) demographic variables, only the locality and status of the health system (strong or weak in terms of child immunization) was found to influence both the poor rating and utilization of public health services.

The Potential for Community-Directed Interventions: Reaching Underserved Populations in Africa.

Community-directed interventions (CDIs) have the potential for fulfilling the promise of primary health care by reaching underserved populations in various settings. CDI has been successfully tested by expanding access to additional health services like malaria case management through local effort in communities where ivermectin distribution is ongoing. The question remains whether the CDI approach has potential in communities that do not have a foundation of community-directed treatment with ivermectin.

African Program for Onchocerciasis Control 1995-2010: Impact of Annual Ivermectin Mass Treatment on Off-Target Infectious Diseases.

Since its initiation in 1995, the African Program for Onchocerciasis Control (APOC) has had a substantial impact on the prevalence and burden of onchocerciasis through annual ivermectin mass treatment. Ivermectin is a broad-spectrum anti-parasitic agent that also has an impact on other co-endemic parasitic infections. In this study, we roughly assessed the additional impact of APOC activities on the burden of the most important off-target infections: soil-transmitted helminthiases (STH; ascariasis, trichuriasis, hookworm, and strongyloidiasis), lymphatic filariasis (LF), and scabies.

The geographic distribution of onchocerciasis in the 20 participating countries of the African Programme for Onchocerciasis Control: (2) pre-control endemicity levels and estimated number infected.

Background: The original aim of the African Programme for Onchocerciasis Control (APOC) was to control onchocerciasis as a public health problem in 20 African countries. In order to identify all high risk areas where ivermectin treatment was needed to achieve control, APOC used Rapid Epidemiological Mapping of Onchocerciasis (REMO). REMO involved spatial sampling of villages to be surveyed, and examination of 30 to 50 adults per village for palpable onchocercal nodules.

African Programme For Onchocerciasis Control 1995-2015: model-estimated health impact and cost.

Background: Onchocerciasis causes a considerable disease burden in Africa, mainly through skin and eye disease. Since 1995, the African Programme for Onchocerciasis Control (APOC) has coordinated annual mass treatment with ivermectin in 16 countries. In this study, we estimate the health impact of APOC and the associated costs from a program perspective up to 2010 and provide expected trends up to 2015.

A model for evaluating the sustainability of community-directed treatment with ivermectin in the African Program for Onchocerciasis Control.

Onchocerciasis is controlled by mass treatment of at-risk populations with ivermectin. Ivermectin is delivered through community-directed treatment (CDTI) approach. A model has been developed to evaluate the sustainability of the approach and has been tested at 35 projects in 10 countries of the African Program for Onchocerciasis Control (APOC).

Characteristics of persons who complied with and failed to comply with annual ivermectin treatment.

Objective: To assess individual compliance with annual ivermectin treatment in onchocerciasis-endemic villages.

Methods: Multi-site study in eight APOC-sponsored projects in Cameroon, Nigeria and Uganda to identify the socio-demographic correlates of compliance with ivermectin treatment. A structured questionnaire was administered on 2305 persons aged 10 years and above.

Empowering communities in combating river blindness and the role of NGOs: case studies from Cameroon, Mali, Nigeria, and Uganda.

The control of onchocerciasis is not only a major success story in global health, but also one of the best examples of the power of public-private partnership at the international level as well as at the national level. The onchocerciasis story is also a leading example of the contribution of a group of called Non-Governmental Development Organizations (NGDO) to operational research which resulted in important changes in treatment strategies and policies.The four case studies presented here illustrate some key contributions the NGDOs made to the development of "community directed treatment with ivermectin" -CDTI, in Africa, which became the approved methodology within the African Programme for Onchocerciasis Control (APOC).

Changes in stigma and discrimination of onchocerciasis in Africa.

Forms of onchocerciasis-related stigmatisation, following over 10 years of implementation of community directed treatment with ivermectin (CDTI), were documented through a survey conducted between September and November 2009 to look at perceived changes in stigma over the past 7-10 years. We documented people's perceptions towards stigma before and after the introduction of CDTI from 1600 structured interviews with households selected from the community treatment registers; in-depth interviews with 57 community leaders, community directed distributors and health personnel; 33 focus group discussions with male and female community members in different age groups (18-24, 25-54 and ≥55 years) and 13 case studies. People with onchocercal skin disease (OSD) with rough skin, swellings and rashes were the most stigmatised.

Community-driven interventions can revolutionise control of neglected tropical diseases.

Whether global health interventions target diseases (vertical), systems (horizontal) or both (diagonal), they must address the challenge of delivering services in very remote areas of poor countries with inadequate infrastructure. The primacy of this challenge has been underscored by persistent service-delivery difficulties despite several large financial commitments - the latest, US $363 million in the January 2012 London Declaration. Community-driven approaches, pioneered in river blindness control, show that engaging communities can maximise access and performance.

Impact of long-term treatment of onchocerciasis with ivermectin in Kaduna State, Nigeria: first evidence of the potential for elimination in the operational area of the African Programme for Onchocerciasis Control.

Background: Onchocerciasis can be effectively controlled as a public health problem by annual mass drug administration of ivermectin, but it was not known if ivermectin treatment in the long term would be able to achieve elimination of onchocerciasis infection and interruption of transmission in endemic areas in Africa. A recent study in Mali and Senegal has provided the first evidence of elimination after 15-17 years of treatment. Following this finding, the African Programme for Onchocerciasis Control (APOC) has started a systematic evaluation of the long-term impact of ivermectin treatment projects and the feasibility of elimination in APOC supported countries.

Intention to continue with ivermectin treatment for onchocerciasis control after eight years of annual distribution in Cameroon, Nigeria, and Uganda.

This study identified the socio-demographic correlates of intention to comply with ivermectin treatment, from a structured interview of 2,306 persons aged 10 years and above, grouped into high and low compliers, who took ivermectin 6-8 times and 0-2 times respectively. Simple descriptive statistics were employed in characterizing the respondents into high and low compliers, while some socio-demographic and key perceptual factors were employed in regression models constructed to explain levels of compliance among the respondents. Demographic and perceptual factors associated with intention to comply with prolonged treatment with ivermectin were identified.

Compliance with eight years of annual ivermectin treatment of onchocerciasis in Cameroon and Nigeria.

Background: As the African Programme for Onchocerciasis Control (APOC) matured into its 10th year of ensuring community involvement in mass annual treatment of onchocerciasis with ivermectin, there was recognition of a need to study not only annual coverage of ivermectin in villages but also the compliance of individual villagers with these annual treatments. This was based on the concern that while population coverage goals may be achieved each year, there might be segments of the population who systematically are not complying with the annual regimen, thus creating a reservoir of infection and threatening program gains.

Methods: A multi-site study in five APOC sponsored projects in Nigeria and Cameroon was undertaken to identify the socio-demographic correlates of compliance with ivermectin treatment.

Drawing and interpreting data: Children's impressions of onchocerciasis and community-directed treatment with ivermectin (CDTI) in four onchocerciasis endemic countries in Africa.

Although the depiction of a child leading a blind man is the most enduring image of onchocerciasis in Africa, research activities have hardly involved children. This paper aims at giving voice to children through drawings and their interpretation. The study was conducted in 2009 in Cameroon, Democratic Republic of Congo (DRC), Nigeria and Uganda.

Feasibility of measuring compliance to annual ivermectin treatment in the African Programme for Onchocerciasis Control.

The African Programme for Onchocerciasis Control (APOC) sponsors annual distribution of ivermectin to control onchocerciasis. Ivermectin should be taken annually by 65% of community members for a number of years to eliminate the disease as a public health problem. While many community coverage surveys have been undertaken during project monitoring, individual compliance could not be studied until several annual rounds of distribution had occurred.