Trachoma causes more vision loss and blindness than any other infection in the world. This disease is caused by Chlamydia trachomatis bacteria. Other variants or strains of these bacteria can cause a sexually transmitted infection (chlamydia) and disease in lymph nodes.
This is photomicrograph
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of a conjunctival smear that revealed the presence of what are known as, intracytoplasmic inclusions Trachoma is easily spread through direct personal contact such as from fingers, through shared towels and clothes, and through flies that have been in contact with the eyes or nose of an infected person. When left untreated, repeated Chlamydia trachomatis infections in the eye can cause severe scarring on the inside of the eyelid. This can cause the eyelashes to scratch the cornea (trichiasis). In addition to causing pain, trichiasis permanently damages the cornea and can lead to irreversible blindness.
Chlamydia trachomatis infections spread in areas that lack access to safely managed drinking water and sanitation systems. Trachoma affects the most resource-limited communities in the world. Globally, almost 1.9 million people have vision loss because of trachoma, and it causes 1.4% of all blindness worldwide.1 In 2021, 136 million people lived in trachoma-endemic areas and were at risk of trachoma blindness.
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International commitment to eliminate trachoma as a public health problem worldwide is supported by resolution WHA51.11 of the World Health Assembly .1 Important progress towards this goal has been made by harnessing the mostly informal relationships that exist between partners including Member Stat
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es, the World Health Organization (WHO), academic institutions, donors and nongovernmental organizations. Recognizing that work remains to be done and that the 2020 target2 for elimination is rapidly approaching, in February 2015 the WHO Department of Control of Neglected Tropical Diseases convened a group of academic institutions that had for many years helped WHO to implement its mandate on trachoma and to work towards establishing a Network of WHO collaborating centres (WHOCCs) for Trachoma. The report of that meeting has been published.
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SECOND MEETING REPORT
DECATUR, GA, USA, 26 JUNE 2016
PLoS Neglected Tropical diseases August 16, 2021 https://doi.org/10.1371/journal.pntd.0009697
Chagas disease, also known as American trypanosomiasis, is a neglected tropical disease transmitted by triatomine insects, first identified in 1909. Chagas disease affects approximately 6–7 million peop
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le globally and is highly prevalent in Latin America where most cases are reported. However, there is increasing evidence that Chagas disease is now an important public health issue outside the “classical” endemic countries due to population migration. Our understanding of Chagas disease, including its pathologies and factors relating to progression, remains to date limited, and is also challenged by lack of diagnosis and highly effective treatment. This systematic review aims to describe studies with Chagas patients receiving antiparasitic treatment. Databases were searched for relevant studies published after 1997, and the results of these searches were screened.
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Pathogens . 2021 Nov 16;10(11):1493.doi: 10.3390/pathogens10111493
.Chronic manifestations of Chagas disease present as disabling and life-threatening condi-tions affecting mainly the cardiovascular and gastrointestinal systems. Although meaningful research has outlined the different molecular mech
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anisms underlying Trypanosoma cruzi’s infection and the host-parasite interactions that follow, prompt diagnosis and treatment remain a challenge, particu-larly in developing countries and also in those where the disease is considered non-endemic. This review intends to present an up-to-date review of the parasite’s life cycle, genetic diversity, virulence factors, and infective mechanisms, as well as the epidemiology, clinical presentation, diagnosis, and treatment options of the main chronic complications of Chagas disease.
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This Guide responds to requests from practitioners and country teams who have learned about the Nurturing care framework and want to understand how to adapt health and nutrition services to be supportive of nurturing care and strengthen caregivers’ capacity.
The sixteenth meeting of the Strategic and Technical Advisory Group for Neglected Tropical Diseases (STAG-NTD) was held as a hybrid meeting, 27–28 September 2022.
Dr Ren Minghui, Assistant Director-General, Universal Health Coverage/Communicable and Noncommunicable Diseases, welcomed participan
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ts to the meeting. He said the World Health Organization’s Department of Control of Neglected Tropical Diseases (WHO/NTD) was in a state of transition. Following the death of the late esteemed Director Dr Mwelecele Ntuli Malecela earlier in the year, Dr Gautam Biswas had taken over as Acting Director but would soon retire; the appointment of a new Director was under way. Owing to rotation of STAG-NTD members, this would be the last meeting for some and the first meeting for several new participants. The work however would continue with the same commitment. Discussions over the next two days would focus on critical issues regarding recovery of NTD services following the disruptions caused by coronavirus disease (COVID-19), which had impacted many health services worldwide. He looked forward to receiving the advice and guidance of STAG-N
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Despite the significant role of vector control in national leishmaniasis control programmes, the programmatic community perceives vector control as the weakest component of leishmaniasis control strategies in terms of resources, scientific evidence of the usefulness of interventions and capacity for
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quality-assured implementation. Therefore, the main objective of this manual is to provide practical tools, techniques and procedures to strengthen sand fly control and surveillance in order to improve implementation of leishmaniasis control programmes. The manual provides a rationale for programme managers in different geographical regions on the types of vector control interventions to be used in different epidemiological and environmental settings and also how to measure their impact.
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A key component of elimination is to reduce the number
of unmanaged trachomatous trichiasis cases to less than
1 per 1,000 population in affected areas. This will require
not only a large increase in the number of surgeries
performed, but also improvements in the quality of surgery
and in the e
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fficiency of surgery provision programs. It also
will require that we make special efforts to reach out to
women and the most marginalized populations, who are
disproportionally affected by trichiasis (TT).
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The WHO estimates that 19 million children aged 15 years or younger are visually impaired. Of these, 1.4 million are irreversibly blind and need visual rehabilitation interventions for full psychological and personal development. The remainder have visual problems that could be prevented or treated.
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Identifying children with visual problems early in life so that they can benefit from medical and optical interventions remains a key challenge for most child eye health programmes. Reports from various low-and middle-income countries indicate that the age of children undergoing operation for cataract is frequently too high to achieve maximum benefit.
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The Practical manual on laboratory strengthening, 2022 update provides practical guidance on implementation of WHO recommendations and best practices for TB laboratory strengthening. It is an updated version of the GLI Practical Guide to Laboratory Strengthening published in 2017 and provides the la
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test practical guidance on use of newly recommended diagnostics as well as guidance in key technical areas, including quality assurance and quality management systems, specimen collection and registration, procurement and supply-chain management, diagnostic connectivity, biosafety, data management, human resources, strategic planning, and model algorithms. The key changes are:
inclusion of recent or updated WHO recommendations for tests to diagnose TB and detect drug resistance;
alignment with the latest WHO critical concentrations for phenotypic drug-susceptibility testing (DST) and the new definitions of pre-XDR-TB and XDR-TB;
updated information on building quality-assured TB testing and management capacity using the Stepwise Laboratory Quality Improvement Process Towards Accreditation (SLIPTA) approach (Score-TB package1);
updated information on assessing, analysing and optimising TB diagnostic networks; and
updated information on the use of next-generation sequencing (NGS) to detect mutations associated with drug resistance for surveillance purposes.
The document also provides references to resources and tools relevant for work on laboratory strengthening.
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Pharmaceutical News
Evaluation of Saccharide Content of the WHO 2nd International Standard for Haemophilus Influenzae Polysaccharide Polyribosyl Ribitol Phosphate (PRP) by HPAECPAD Analysis Following Acid Hydrolysis
Consultation Documents
Lamivudine and tenofovir disoproxil fumarate tablets (lami
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vudini et tenofoviri disoproxili fumarati compressi)
Tenofovir disoproxil fumarate tablets (tenofoviri disoproxili fumarati compressi)
ATC/DDD Classification
Temporary
Final
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Report of the WHO/Bill & Melinda Gates Foundation Consultation. The Consultation was organized back-to-back with the first annual meeting of the International Coordinating Group of the BMGF-funded project for human and dog rabies elimination in developing countries, held at WHO headquarters, Geneva,
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Switzerland, from 5 to 7 October 2009. This allowed the Consultation to benefit from the participation of the national coordinators and advisers of the BMGF-funded projects in the Philippines, South Africa (KwaZulu-Natal) and the United Republic of Tanzania
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Trypanosoma cruzi is the etiological agent of Chagas disease (CD), considered one of the most important parasitic infections in Latin America. Between 25 and 90 million humans are at infection risk via at least one of multiple infection mechanisms. Under natural conditions, the principal transmissio
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n modes are transplacental or via one of more than 140 hematophagous triatomine bugs (Reduviidae: Triatominae). Triatomines acquire the parasite from mammal reservoirs due to their obligate blood-feeding (albeit triatomines can also feed on non-reservoir vertebrates such as birds and reptiles). The disease burden for CD in the Latin America and Caribbean region, based on disability-adjusted life-years (DALYs), is at least five times greater than that of malaria, and is approximately one-fifth that of HIV/AIDS. In recent decades, CD has extended to other continents outside natural reservoir or vector distributions due to human migration, with a minimum estimated 10 million individuals infected worldwide.
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Mem Inst Oswaldo Cruz, Rio de Janeiro, Vol. 117: e200460, 2022
Integrating the multiple dimensions of the problem into a coherent approach adapted to field realities and needs represents an immense challenge, but the payoff is more effective and sustainable experiences, with higher social awareness
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, increased case detection and follow-up, improved adherence to care, and integrated participation of various actors from multiple action levels. Information, Education, and Communication (IEC) initiatives have great potential for impact in the implementation of multidimensional programs of prevention and control successfully customised to the diverse and complex contexts where Chagas disease persists.
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This document compiles the recommendations made by the World Health Organization (WHO) and the Pan American Health Organization (PAHO) to help professionals in charge of vector control programs in Latin America and the Caribbean at the national, subnational, and local level update their knowledge in
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order to make evidence-based decisions on the most appropriate control measures for each specific situation. IVM can be used for surveillance and control or for elimination of VBDs and can help reduce the development of insecticide resistance through the rational use of these products. This document provides instructions for fulfillment of the 2008 PAHO mandate set forth in CD 48/13 (Integrated Vector Management).
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El presente documento reúne un conjunto de recomendaciones formuladas por la Organización Mundial de la Salud (OMS) y la Organización Panamericana de la Salud (OPS) para ayudar, a los profesionales encargados de los programas de control de vectores de Latinoamérica y el Caribe a nivel nacional,
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subnacional y local, a actualizar y tomar decisiones basadas en la evidencia sobre las medidas de control más apropiadas para cada situación específica. El MIV puede utilizarse cuando la meta es la vigilancia y el control o la eliminación (dependiendo de la situación específica) de las ETV y puede contribuir a reducir el desarrollo de la Resistencia a los insecticidas mediante el uso racional de estos productos. Este documento contiene las instrucciones para llevar a cabo el mandato de la OPS del 2008 sobre el control integrado de vectores (resolución CD48.R8, documento CD48/13) y, en particular, complementa una serie de guías de la OMS publicadas en el 2012
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Le présent document rassemble une série de recommandations émises par l’Organisation mondiale de la Santé (OMS) et l’Organisation panaméricaine de la Santé (OPS) pour aider les professionnels chargés des programmes de lutte antivectorielle en Amérique latine et dans les Caraïbes aux niv
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eaux national, infranational et local à mettre à jour et prendre des decisions à base factuelle qui touchent les mesures de lutte antivectorielle les mieux adaptées à chaque situation particulière. La GIV peut être utilisée lorsque la cible est la surveillance et la lutte ou l’élimination (en function de chaque situation) des MTV et peut contribuer à réduire le développement de la résistance aux insecticides au moyen de l’utilisation rationnelle de ces produits. Le présent document contient les instructions nécessaires pour mener à bien le mandat établi par l’OPS en 2008 (résolution CD48.R8, document CD48/13), en particulier, il complémente une série de guides de l’OMS publiés en 2012
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Este documento reúne um conjunto de recomendações formuladas pela OMS e pela OPAS para ajudar os profissionais responsáveis pelos programas de controle de vetores nas Américas em nível nacional, subnacional e local a se atualizarem e tomarem decisões baseadas em evidências sobre as medidas d
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e controle mais apropriadas para cada situação. O MIV pode ser utilizado quando o objetivo é a vigilância e o controle ou a eliminação (dependendo da situação específica) das DTVs e pode ajudar a reduzir o desenvolvimento de resistência aos inseticidas pelo uso racional desses produtos. Este documento contém instruções para a execução do mandato de 2008 da OPAS sobre o manejo integrado de vetores (resolução CD48.R8, documento CD48/13) e, em particular, complementa uma série de diretrizes da OMS publicadas em 2012
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The World Health Organization (WHO) and the global community of countries, partners, donors, technical experts, scientists and field implementation teams continue to work towards the ultimate goal of a world free of the burden of neglected tropical diseases (NTDs).