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Coverage of preventive measures and surveillance for neglected tropical diseases in hard-to-reach communities in Ghana

Abstract

Background

Neglected tropical diseases (NTDs) are a major public health burden which mainly affects poor populations living in tropical environments and hard-to-reach areas. The study sought to examine coverage of preventive efforts, and case surveillance for NTDs in hard-to-reach communities in Ghana.

Methods

The study investigated treatment efforts for lymphatic filariasis (LF), and onchocerciasis and schistosomiasis/soil transmitted helminths (SCH/STH) at household level, in difficult-to-access communities in Ghana. A total of 621 households were sampled from 6 communities in the Western, Oti and Greater Accra regions.

Results

Over 95% of the households surveyed were covered under mass drug administration (MDA) campaigns for lymphatic filariasis (LF) and onchocerciasis. More than 80% of households had received at least two visits by community drug distributors under the MDA campaigns in the last two years preceding the study. In addition, over 90% of households in the LF and onchocerciasis endemic communities had at least one member using anthelminthic medications under the MDA campaigns in the 12 months preceding the study. However, households where no member had taken anthelminthic medications in 12 months preceding the study were over 6 times likely to have someone in the household with LF.

Conclusions

This study determined that SCH/STH, LF and onchocerciasis are of serious public health concern in some communities in Ghana. There is an urgent need for holistic practical disease control plan involving both financial and community support to ensure total control of NTDs in difficult-to-access communities is achieved.

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Background

Neglected tropical diseases (NTDs) are a major public health issue affecting poor populations living in tropical environment, and hard-to-reach areas [1, 2]. According to a World Bank study, more than half of sub-Saharan Africa’s population lives on less than US$1.25 per day [3]. This gives an indication of the number of people in the region at risk of NTDs. Physical disabilities, discrimination, and impaired cognitive development resulting from NTDs can also contribute to the social and economic burden of individuals and communities [4, 5]. These interrelated consequences of NTDs further deepen the cycle of poverty as it decreases productivity.

In Ghana, unsafe health practices, limited access to safe water, poor sanitation, and a lack of awareness of the causes of NTDs continue to pose a serious challenge to achieving elimination of NTDs [6, 7]. Nonetheless, there have been efforts to reduce the burden of NTDs in Ghana over the last two decades. For example, the Neglected Tropical Diseases Programme (NTDP) has focused on preventive chemotherapy and transmission control of diseases such as lymphatic filariasis (LF), onchocerciasis, schistosomiasis (SCH), and soil-transmitted helminthiasis (STH) [6,7,8]. Furthermore, the Ghana NTD master plan has integrated all NTDs, such as LF, SCH, and STH, and included mass drug administration (MDA), and case management based on national strategic priorities [6, 7, 9,10,11]. In addition, there have been interventions such as the distribution of treated bed nets and indoor residual spraying (IRS) to control malaria in some highly endemic malaria transmission areas, which also happen to be endemic sites for LF [12, 13]. Considering that malaria and LF share the same vectors, these vector control efforts also affect the control and transmission of LF.

Although progress has been made to reduce the burden of selected NTDs in Ghana [7, 14], however, ongoing studies in some districts have found Anopheles gambiae mosquitoes infected with the LF parasite (Wuchereria bancrofti) in communities where transmission is supposed to have been interrupted [15]. Similarly, Onchocerca volvulus in Simulium damnosum has been found in some communities where transmission is supposed to have been disrupted [16]. In addition, a major challenge is the fact that some villages endemic for LF, onchocerciasis or both are cut off from the mainland by water, making access to treatment difficult [17]. Studies on SCH and STHs among school children in island communities in Ghana have revealed higher (51–70%) infection rates than those living on the mainland [18].

The success of NTD control programs relies on reducing pockets of disease transmission countrywide [19]. As such, preventive measures should be focused on communities at risk of the various NTDs, particularly those that are hard to reach. This is because hard-to-reach communities can be sources of persistent infection that can continue to delay the country’s control and elimination efforts. WHO [1] recommends continued efforts in ensuring treatment of NTDs, as well as improving monitoring and surveillance tools, as important steps in eliminating NTDs.

These reasons underscore the need for studies that examine control efforts in at-risk populations in order to reduce the burden and control NTDs such as LF, onchocerciasis, and SCH/STH in Ghana [10]. This study therefore sought to determine the extent of coverage of preventive measures at the household level for NTDs in hard-to-reach communities in Ghana.

Methods and materials

Study design

The study was cross-sectional in design assessing interventions to control LF and onchocerciasis using a household survey among people living in difficult-to-access communities in Ghana.

Study sites

Data on LF were collected in two communities in the Western Region of Ghana – Old Bakanta and New Bakanta (both in the Ellembelle District). The study sites for onchocerciasis were Azua and Wui in the Nkwanta North District of the Oti Region. Data on SCH and STH were collected in Tuanikope and Pediatorkope in the Ada East District of the Greater Accra Region (Fig. 1). These communities were selected based on their relative risk of NTDs, difficulty in accessing health care for NTDs and other communicable/infectious diseases as well as being hard to reach areas.

Fig. 1
figure 1

Map showing the study sites used in this study

Study procedure

In each community, all households were eligible to be selected to take part in the survey. The total number of households in each community ranged between 60 and 250, depending on the size of the community. A simple random sampling approach was used to select households to participate in the study from May 2019 to September 2019. Estimated sample size was calculated based on the following: margin of error = 5%; design effect = 1; clusters = 1; confidence level = 95%. The combined sample size was 621 households. Table 1 shows the sample sizes and response rate for each study community.

Table 1 Number of Respondents recruited into the study per Community

A household-level questionnaire was administered to heads of households (or the oldest adult household member) in the study communities (see S1 File for Copy of Questionnaire on Socio-Demographic demographic and socio-economic characteristics of the household head, household characteristics, and coverage of preventive measures. Participation was voluntary, and written consent from participants was taken in accordance with the ethical committee’s guidelines.

Ethical considerations

The study was performed in accordance with the Declaration of Helsinki, and was approved by the Ethics and Protocol Review Committee (EPRC) of the College of Health Sciences, University of Ghana (Ethical No: CHS-ET/M.2–4.10/2018–2019). Written informed consent was provided by all adult participants.

Data analysis

Univariate results were expressed as percentages (for categorical variables) or means ± standard deviations (for continuous variables). Logistic regression analysis was used to assess the association between preventive measures and the prevalence of LF and onchocerciasis. The data were analysed with SPSS (version 23).

Results

Background characteristics of household heads

Table 2 shows the socio-demographic characteristics of household heads for the overall sample, and by study community. The mean age of household heads in the overall sample was 43.6 years. In all the study communities, there were more male headed households (65%) than female headed households (35%). A majority of household heads in the overall sample had some formal education (58%), were Christian (64%), belonged to a non-Akan ethnic group (61%) and were farmers (40%).

Table 2 Characteristics of Household Heads

Household characteristics assessed in the study sites

The median monthly household income ranged from GHC150 (≈$27) in Azua, to GHC350 (≈$63) in Wui. The average household size was 5.8, although in the community of Azua, the average household size was higher (7.3) (Table 3).

Table 3 Selected Household Characteristics

Regarding water and sanitation, more than half (55%) of the respondents reported that water for the household use was from unprotected sources (such as surface water and borehole). All other household heads (45%) reported that water for their household use was from protected sources (such as pipe in the house or public tap/standpipe). More than half of household heads (53%) reported lack of a toilet facility, and indicated that members of the household as a result practiced open defecation.

Coverage of preventive measures

Approximately 96% and 98% of households in the LF and onchocerciasis endemic communities were covered under MDA campaigns (Table 4). Furthermore, 82% and 86% of households in the LF and onchocerciasis endemic communities respectively had received at least two visits by community drug distributors (CDDs) under the MDA campaigns in the last two years preceding the study.

Table 4 NTD control strategies

In addition, 90% and 95% of households in the LF, and onchocerciasis endemic communities had at least one member using anthelminthic medications under the MDA campaigns in the 12 months preceding the study (Table 4). In the LF endemic communities, 79% of households often used treated bed nets to protect themselves against mosquitoes that transmit the infection. In the SCH/STH endemic communities there had been no MDA visits in the last two years preceding the study, and only 5% of households self-administered anthelminthic medications in the 12 months preceding the study.

Association between interventions and disease burden

Table 5 shows the logistic regression analyses assessing the association between control strategies and the prevalence of the NTDs. Coverage, and frequency of MDA campaigns were not included in the analysis due to bias estimates or non-assessment of those variables in some study communities. For example, frequency of MDA was not assessed in the SCH/STH endemic communities since no household in the study communities were covered under MDA campaigns.

Table 5 Association between preventive measures and the prevalence of NTDs in households

Adjusted odds ratio analyses revealed that households where no member had taken anthelminthic medications in the 12 months preceding the study were over 6 times more likely to have someone in the household with LF

Discussion

Lymphatic filariasis (LF), onchocerciasis, schistosomiasis, and soil transmitted helminths are important neglected tropical diseases in sub-Saharan Africa, including Ghana. This study investigated treatment efforts for lymphatic filariasis (LF) and onchocerciasis at the household level in difficult-to-access communities in Ghana. Findings from this study revealed households where no member had taken anthelminthic medications in the 12 months preceding the study were over 6 times likely to have someone in the household with LF, and self-reported household prevalence for onchocerciasis was higher compared to LF and SCH/STH. This finding corroborates the assertion that even though a combination of effective vector control and access to treatment will reduce the prevalence of LF in communities, MDA is a more effective control strategy [20]. This study has revealed there is a need to assess the current control interventions on onchocerciasis in Ghana in order to ensure the prevalence of onchocerciasis is reduced to a level where it ceases to be a public health concern.

This study revealed that the majority of households covered under preventive treatment for LF and onchocerciasis had received at least two MDA visits in the last two years preceding the study and had at least one household member using anthelminthic drugs within the last year preceding the survey. On the contrary, there had been no MDA visits in the SCH/STH endemic communities in the last two years preceding the survey, and only 5% of households reported using anthelminthic drugs in the last year. These findings suggest that control strategies for NTDs have been unequal in difficult-to-access communities in Ghana. In addition, it has been suggested that to help control NTDs, there should be sustained, expanded, and extended drug access programs to ensure the necessary supply of drugs, as well as addressing identified drawbacks to improve the effectiveness of other interventions [21]. Studies conducted in Côte d’Ivoire by Loukouri et al. [20] have revealed that annual and semi-annual mass drug administration for Lymphatic Filariasis and Onchocerciasis helped reduced the prevalence of infection.

However, taking into account the logistical challenges associated with MDA and other vector control interventions, achieving coverage of the entire population is hardly ever achieved, particularly in difficult-to-access communities, and this results in residual infections [22]. Therefore, it is essential that the entire coverage of these interventions be ensured by district health authorities to achieve control and elimination of LF and onchocerciasis with time. There is evidence to show that knowledge of a disease condition influences attitude and practice, which improves compliance with treatment and subsequently leads to a reduction in prevalence [23]. Periodic health education, facilitated by well-trained community drug distributors, and focusing on gaps in knowledge, should be pursued in the study communities.

The implementation of semi-annual community-wide MDA in the SCH/STH endemic study communities should be vigorously pursued and sustained. Evidence from previous studies in similar settings show that MDA programs have been largely effective against SCH and STH particularly among school-age children [24, 25].

Conclusions

Optimizing surveillance, and improving the success rates of the MDA and other vector control programs in Ghana depends in large part on visits facilitated by CDDs. The findings suggest that CDDs in communities where NTDs are endemic should be given well-defined mandates, regularly trained, and supervised, and given the necessary resources to execute their mandate considering the relative precarious circumstances in the communities they serve. Over time, this will guarantee the success of strategies to control and possibly eliminate NTDs in difficult-to-access communities.

Availability of data and materials

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

Abbreviations

NTDs:

Neglected tropical diseases

SCH:

Schistosomiasis

STH:

Soil transmitted helminths

LF:

Lymphatic Filariasis

GHC:

Ghana cedis

References

  1. World Health Organization. Fourth WHO report on neglected tropical diseases. source: https://www.reliefwebint/report/world/integrating-neglected-tropical-diseases-global-health-and-development-fourth-who-report?gclid=CjwKCAiAuOieBhAIEiwAgjCvcmXAqq-6hFdXwoqzaCrb. 2017.

  2. Standley C, Boyce MR, Klineberg A, Essix G, Katz R. Organization of oversight for integrated control of neglected tropical diseases within Ministries of Health. PLoS Negl Trop Dis. 2018;12(11):e0006929.

    Article  PubMed  PubMed Central  Google Scholar 

  3. Hotez PJ, Kamath A. Neglected tropical diseases in sub-saharan Africa: review of their prevalence, distribution, and disease burden. PLoS Negl Trop Dis. 2009;3(8):e412.

    Article  PubMed  PubMed Central  Google Scholar 

  4. Mitra AK, Mawson AR. Neglected Tropical Diseases: Epidemiology and Global Burden. Trop Med Infect Dis. 2017;2(3):36.

    Article  PubMed  PubMed Central  Google Scholar 

  5. Kuper H. Neglected tropical diseases and disability-what is the link? Trans R Soc Trop Med Hyg. 2019;113(12):839–44.

    Article  PubMed  PubMed Central  Google Scholar 

  6. Ghana Health Service (GHS). End Neglected Tropical Diseases in Ghana. source: http://www.endinafricaorg/wp-content/uploads/2012/11/Ghana-Country-Profile-2016pdf. 2016.

  7. Otoo DD, Appiah-Agyekum NN, Adzei FA. Perceived determinants of implementation success of the neglected tropical diseases programme in Ghana: a qualitative study among programme officers. BMC Public Health. 2021;21(1):2074.

    Article  PubMed  PubMed Central  Google Scholar 

  8. https://endinafrica.org/news/supportive-supervision-during-ghanas-2017-onchocercaisis-survey/?s=lymphatic+filariasis&submit=Search. 2017.

  9. USAID. Supportive Supervision during Ghana’s 2017 Onchocerciasis Survey. Source: Supportive Supervision during Ghana’s 2017 Onchocerciasis Survey | END in Africa. 2017. Accessed 10 Jan 2023.

  10. Hotez PJ, Biritwum NK, Fenwick A, Molyneux DH, Sachs JD. Ghana: Accelerating neglected tropical disease control in a setting of economic development. PLoS Negl Trop Dis. 2019;13(1):e0007005.

    Article  PubMed  PubMed Central  Google Scholar 

  11. Krentel A, Fischer PU, Weil GJ. A review of factors that influence individual compliance with mass drug administration for elimination of lymphatic filariasis. PLoS Negl Trop Dis. 2013;7(11):e2447.

    Article  PubMed  PubMed Central  Google Scholar 

  12. Alhassan Y, Dwomoh D, Amuasi SA, Nonvignon J, Bonful H, Tetteh M, et al. Impact of insecticide-treated nets and indoor residual spraying on self-reported malaria prevalence among women of reproductive age in Ghana: implication for malaria control and elimination. Malar J. 2022;21(1):120.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  13. Bockarie MJ, Pedersen EM, White GB, Michael E. Role of vector control in the global program to eliminate lymphatic filariasis. Annu Rev Entomol. 2009;54:469–87.

    Article  CAS  PubMed  Google Scholar 

  14. COUNTDOWN. Case Study: Community Drug Distributors in the control of NTDs in Ghana: CDD and Health System perspectives. 2014. Source: https://countdown.lstmed.ac.uk/sites/default/files/centre/Community%20Drug%20Distributors%20in%20Ghana.pdf. Accessed 12 Feb 2023.

  15. Pi-Bansa S, Osei JHN, Kartey-Attipoe WD, Elhassan E, Agyemang D, Otoo S, et al. Assessing the Presence of Wuchereria bancrofti Infections in Vectors Using Xenomonitoring in Lymphatic Filariasis Endemic Districts in Ghana. Trop Med Infect Dis. 2019;4(1):49.

    Article  PubMed  PubMed Central  Google Scholar 

  16. Biritwum N-K, de Souza DK, Asiedu O, Marfo B, Amazigo UV, Gyapong JO. Onchocerciasis control in Ghana (1974–2016). Parasit Vectors. 2021;14(1):3.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  17. Dhikrullahi SB. Entomological Assessment of Lymphatic Filariasis Transmission in Ghana. University of Ghana. 2017. Source:https://ugspace.ug.edu.gh/handle/123456789/23247.

  18. Akosah-Brempong G, Attah SK, Hinne IA, Abdulai A, Addo-Osafo K, Appiah EL, et al. Infection of Plasmodium falciparum and helminths among school children in communities in Southern and Northern Ghana. BMC Infect Dis. 2021;21(1):1259.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  19. Flanagan SM, Hancock B. Reaching the hard to reach’ - lessons learned from the VCS (voluntary and community Sector). A qualitative study. BMC Health Services Research. 2010;10(1):92.

    Article  PubMed  PubMed Central  Google Scholar 

  20. Loukouri A, Méité A, Koudou BG, Goss CW, Lew D, Weil GJ, et al. Impact of annual and semi-annual mass drug administration for Lymphatic Filariasis and Onchocerciasis on Hookworm Infection in Côte d’Ivoire. PLoS Negl Trop Dis. 2020;14(9):e0008642.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  21. Uniting to combat NTDs. Neglected Tropical Diseases. source: https://www.unitingtocombatntdsorg/. 2012.

  22. Mendis K. Mass drug administration should be implemented as a tool to accelerate elimination: against. Malar J. 2019;18(1):279.

    Article  PubMed  PubMed Central  Google Scholar 

  23. Busari OA, Olanrewaju TO, Desalu OO, Opadijo OG, Jimoh AK, Agboola SM, et al. Impact of Patients’ Knowledge, Attitude and Practices on Hypertension on Compliance with Antihypertensive Drugs in a Resource-poor Setting. TAF-Preventive Medicine Bulletin. 2010;9(2):87.

    Google Scholar 

  24. Koukounari A, Gabrielli AF, Toure S, Bosque-Oliva E, Zhang Y, Sellin B, et al. Schistosoma haematobium infection and morbidity before and after large-scale administration of praziquantel in Burkina Faso. J Infect Dis. 2007;196(5):659–69.

    Article  PubMed  Google Scholar 

  25. Satayathum SA, Muchiri EM, Ouma JH, Whalen CC, King CH. Factors affecting infection or reinfection with Schistosoma haematobium in coastal Kenya: survival analysis during a nine-year, school-based treatment program. Am J Trop Med Hyg. 2006;75(1):83–92.

    Article  PubMed  Google Scholar 

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Acknowledgements

The authors are grateful to community members of Old Bakanta and New Bakanta in the Ellembelle district of the Western region, and Azua and Wui in the Nkwanta North district of the Oti Region who took part in this study. We are highly indebted to NTDs programme coordinator of Ghana who coordinated the programme at the district level.

Funding

This work received financial support from the coalition for Operational Research on Neglected Tropical Diseases (COR-NTD), which is funded by the Task Force for Global Health primarily by the Bill & Melinda Gates Foundation, the United States Agency for International Development through its Neglected Tropical Diseases Program, and with UK aid from the British government (Grant No: SGPII/0114/088). This study was also supported by a grant from the National Institute of Health (D43 TW 011513). The funders had no role or influence on the design of this study, the collection, analysis, and interpretation of the data collected, as well as in writing this manuscript.

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Authors and Affiliations

Authors

Contributions

AOF performed the field and laboratory work, analyzed data and drafted the manuscript. RBA and SBA analyzed data and drafted the manuscript. ARM, CMO, GA, AA, IKS, SBD, and SKA performed field and laboratory experiments, and revised the manuscript. YAA conceived, performed field experiments, supervised the study, and revised the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Yaw Asare Afrane.

Ethics declarations

Ethics approval and consent to participate

Ethical clearance was sought from the Ethics and Protocol Review Committee (EPRC) of the College of Health Sciences, University of Ghana (Ethical No: CHS-ET/M.2–4.10/2018–2019). Written informed consent was provided by all the study participants before involvement in the study.

Consent for publication

Not applicable.

Competing interests

The authors declare that they have no competing interests.

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Supplementary Information

Additional file 1: S1.

File Household Questionnaire-2.

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Forson, A.O., Awuah, R.B., Mohammed, A.R. et al. Coverage of preventive measures and surveillance for neglected tropical diseases in hard-to-reach communities in Ghana. BMC Public Health 23, 1784 (2023). https://doi.org/10.1186/s12889-023-16652-1

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