Jointly conducted by UGB and IRD [Ile-de-France], this research highlights the challenges of combating infectious diseases in Madagascar.
Elinambinina Rajaonarifara, researcher at UMMISCO; MIVEGEC (Université Gaston Berger de Saint-Louis Sénégal).
Thesis defended in 2023 at the doctoral school École doctorale Pierre Louis de santé publique : épidémiologie et sciences de l'information biomédicale (Paris ; 2000-....).
This research is the result of an international co-supervision between several partner institutions.
Referenced in the ABES/STAR network, this thesis meets the rigorous criteria of French higher education.
The fight against infectious diseases in low-income rural areas represents a major challenge, particularly in sub-Saharan Africa, where living conditions and access to care are often precarious. Madagascar, with its geographical, cultural, and socio-economic specificities, perfectly illustrates this complex and multidimensional issue. Elinambinina Rajaonarifara's thesis thoroughly addresses the obstacles to combating lymphatic filariasis and childhood vaccination, two crucial issues for public health in this region.
The results of this research highlight alarming disparities in access to care. In the Southeast of Madagascar, for example, the geographical isolation of certain communities makes access to health infrastructure difficult. The often impassable roads, especially during the rainy season, limit the ability of populations to reach health centers. This has direct consequences on the health of children, who are the most vulnerable to vaccine-preventable diseases.
Moreover, the fragility of health systems in these areas is an aggravating factor. Health facilities often lack qualified personnel, essential medicines, and basic equipment. This situation is exacerbated by often insufficient funding, which does not meet the growing needs of the population. Consequently, these elements constitute significant barriers to the effective implementation of health programs. Indeed, despite global efforts to reduce the burden of infectious diseases, certain regions, such as the Southeast of Madagascar, continue to suffer from limited access to care and prevention.
The mathematical models used in this study help to better understand the dynamics of lymphatic filariasis. These models reveal that heterogeneity in the implementation of drug distribution programs can increase the risk of disease re-emergence. For example, in certain localities, preventive treatment campaigns only reach a fraction of the target population, leaving vulnerable groups exposed to the risk of infection. This raises crucial questions about the effectiveness of current strategies and the need to adapt interventions to local contexts.
Strengthening health systems is also highlighted as an essential lever for improving vaccination coverage. The results emphasize that robust health systems are indispensable to ensure the effectiveness of vaccination programs. This involves not only increasing funding but also training local health personnel and raising community awareness about the importance of vaccination. For example, awareness campaigns led by community health workers can play a key role in vaccine acceptance among populations.
In summary, this research calls for in-depth reflection on public health strategies, taking into account local specificities and the needs of populations. It is imperative that decision-makers consider these results to develop appropriate and effective health policies. The engagement of local actors, adequate funding, and a community-centered approach are key elements to overcoming these challenges.
It is also crucial to involve community leaders in the design and implementation of health programs. Their knowledge of local realities and their influence on population behaviors can facilitate adherence to health initiatives. Furthermore, collaboration among various stakeholders, including NGOs, local governments, and international partners, is essential to create an environment conducive to the fight against infectious diseases.
In conclusion, the fight against lymphatic filariasis and the improvement of childhood vaccination in the Southeast of Madagascar require an integrated and multisectoral approach. This involves not only medical interventions but also efforts to improve living conditions, strengthen health systems, and mobilize communities. Only such an approach can truly transform the public health landscape in this region and ensure a healthier future for generations to come.
Key Facts
- 40%: Représente la part du fardeau des maladies tropicales négligées supportée par l'Afrique subsaharienne.
- 90%: Indique le pourcentage de décès dus au paludisme sur le continent.
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Sources and Access
Elinambinina Rajaonarifara. Les barrières à la lutte contre les maladies infectieuses dans les zones rurales à faibles revenus : cas de la filariose lymphatique et de la vaccination infantile dans le Sud-Est de Madagascar. Santé publique et épidémiologie. Sorbonne Université, 2023. Français. ⟨NNT : 2023SORUS604⟩. ⟨tel-04609268⟩