Resource planning for neglected tropical disease (NTD) control programs: feasibility study of the Tool for Integrated Planning and Costing (TIPAC)

Policy and Executive Barriers in Preventing and Eradicating Neglected Tropical Diseases: A Systematic Review

Background

Tropical diseases inflict many of those living in tropical and subtropical areas each year. These populations because of these diseases suffer considerable financial and human losses. Some of these diseases are known as Neglected Tropical Diseases (NTDs) and they can be highly dangerous. Still, they have not received the attention they need. Given the necessity of eliminating these diseases, the present study is an attempt to examine the reasons for unsuccessful attempts to eliminate diseases like NTDs.

Methods

The current study was a systematic analysis of literature on neglected tropical diseases that were found in the databases of the Web of Science, PubMed, Scopus, Science Direct, Pro Quest, Cochrane, and Embase before April 2023. The Critical Appraisal Skills Program (CASP) for articles and the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) criteria were used to conduct the study.

Results

Based on the systematic search, 3193 papers were found and after the elimination of duplicates and irrelevant ones, a total of 28 articles remained to examine the challenges to eradicate neglected tropical diseases. Four themes were found for the challenges of controlling and eliminating neglected tropic diseases including drawbacks of programs for disease management policies, environmental challenges, executive challenges, and research field challenges. Thirty-six subthemes were obtained in this study, which showed cases such as the presence of immigrants and refugees, weaknesses in public health infrastructure and programs, dynamic epidemiological settings, lack of executive prioritization appropriate to endemic countries, and highly customized research infrastructures. Ending neglected tropical diseases requires an innovative roadmap and global cooperation.

Conclusions

To achieve important eradication goals, measures such as acceleration in practice are needed to plan, intensify executive and operational approaches, change application models, innovate processes, and promote culture are needed. In addition, to make possible the elimination of neglected tropical diseases, there is an undeniable need for providing financial, human, and research resources. In addition, there is a need for efficient health infrastructure management, paying attention to migrants and refugees, setting explicit targets, prioritizing based on local conditions, and paying more attention to political and social developments.

Probabilistic forecasts of trachoma transmission at the district level: A statistical model comparison

The World Health Organization and its partners are aiming to eliminate trachoma as a public health problem by 2020. In this study, we compare forecasts of TF prevalence in 2011 for 7 different statistical and mechanistic models across 9 de-identified trachoma endemic districts, representing 4 unique trachoma endemic countries. We forecast TF prevalence between 1-6 years ahead in time and compare the 7 different models to the observed 2011 data using a log-likelihood score. An SIS model, including a district-specific random effect for the district-specific transmission coefficient, had the highest log-likelihood score across all 9 districts and was therefore the best performing model. While overall the deterministic transmission model was the least well performing model, although it did comparably well to the other models for 8 of 9 districts. We perform a statistically rigorous comparison of the forecasting ability of a range of mathematical and statistical models across multiple endemic districts between 1 and 6 years ahead of the last collected TF prevalence data point in 2011, assessing results against surveillance data. This study is a step towards making statements about likelihood and time to elimination with regard to the WHO GET2020 goals.

Leishmanicidal evaluation of tetrahydroprotoberberine and spirocyclic erythrina-alkaloids

Leishmaniasis is one of the World’s most problematic diseases in developing countries. Traditional medicines to treat leishmaniasis have serious side effects, as well as significant parasite resistance problems. In this work, two alkaloids 1 and 2 were obtained from Corydalis govaniana Wall and seven alkaloids 3–9, were obtained from Erythrina verna. The structures of the compounds were confirmed by mass spectrometry and 1D- and 2D-NMR spectroscopy. The leishmanicidal activity of compounds 1–9 against Leishmania amazonensis was tested on promastigote forms and cytotoxicity against J774 (macrophage cell line) was assessed in vitro. Compound 1 showed potent activity (IC₅₀ = 0.18 µg/mL), compared with the standard amphotericin B (IC₅₀ = 0.20 µg/mL). The spirocyclic erythrina-alkaloids showed lower leishmanicidal activity than dibenzoquinolizine type alkaloids.