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Epidemiology
Chagas disease (American trypanosomiasis) is caused by the protozoan parasite Trypanosoma cruzi, and transmitted to humans by infected triatomine bugs, and less commonly by transfusion, organ transplant, from mother to infant, and in rare instances, by ingestion of contaminated food or
...
drink.1-4 The hematophagous triatomine vectors defecate during or immediately after feeding on a person. The parasite is present in large numbers in the feces of infected bugs, and enters the human body through the bite wound, or through the intact conjunctiva or other mucous membrane.
Vector-borne transmission occurs only in the Americas, where an estimated 8 to 10 million people have Chagas disease.5 Historically, transmission occurred largely in rural areas in Latin America, where houses built of mud brick are vulnerable to colonization by the triatomine vectors.4 In such areas, Chagas disease usually is acquired in childhood. In the last several decades, successful vector control programs have substantially decreased transmission rates in much of Latin America, and large-scale migration has brought infected individuals to cities both within and outside of Latin America.
more
Urogenital schistosomiasis is a common neglected tropical disease in many rural communities in African countries, with patches of infection in the Eastern Mediterranean Region. Globally, an estimated 239 million people are currently infected, with b
...
urden estimated at more than 3.5 million disability-adjusted life years (DALYs). In many endemic areas, severely infected individuals may suffer fibrosis of the bladder, kidney damage, bladder cancer, and death if untreated. This, however, depends on several factors such as host-parasite genetics, degree and length of exposure, intensity of infection, host immune response to the parasites, and coinfections with other tropical diseases such as malaria and HIV-1.
more
Rabies is a fatal viral disease, but is preventable in humans. The rabies virus is transmitted to humans through virus-laden saliva from a rabid animal, mostly dogs. The virus is shed in the saliva of an infected animal and can be introduced into another body through bites, scratches and any other
...
wounds that transect the skin. Contact of the infected saliva with mucous membranes is also thought to be a possible route of infection, whereas contact of infected saliva with intact skin is not considered an exposure. Rabies is preventable through pre-exposure prophylaxis (PrEP) for individuals at high and continual risk, and post-exposure prophylaxis (PEP).
more
Lymphatic filariasis, commonly known as elephantiasis, is a neglected tropical disease. Infection occurs when filarial parasites are transmitted to humans through mosquitoes. When a mosquito with infective stage larvae bites a person, the parasites
...
are deposited on the person’s skin from where they enter the body. The larvae then migrate to the lymphatic vessels where they develop into adult worms in the human lymphatic system.
more
Geneva, 22 May 2023 – Gavi, the Vaccine Alliance today published a roadmap* outlining critical actions needed to ensure supply of oral cholera vaccine (OCV) is able to meet growing demand from countries. Released against a backdrop of a recent wave of cholera outbreaks around the world, the roadma
...
p forecasts the short-, mid- and long-term outlook for global cholera vaccine supply. Developed in consultation with a range of key Alliance partners, including WHO, UNICEF, the Global Taskforce for Cholera Control (GTFCC), and the Bill and Melinda Gates Foundation (BMGF), it describes how these organizations, manufacturers and countries can work together towards ensuring global OCV supply can support largescale preventive vaccination by 2026.
more
The ninth WHO report on the global tobacco epidemic tracks the progress made by countries in tobacco control since 2008 and, marks 15 years since the introduction of the MPOWER technical package which is designed to help countries implement the dema
...
nd-reduction measures of the WHO Framework Convention on Tobacco Control. The report shows that many countries continue to make progress in the fight against tobacco, but efforts must be accelerated to protect people from the harms of tobacco and second-hand smoke.
more
The Coronavirus Disease 2019 (COVID-19) has had a continuous and robust impact on world health. The resulting COVID-19 pandemic has had a devastating physical, mental and fiscal impact on the millions of people living with noncommunicable diseases (NCDs), as they have a higher risk of severe illness
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and death from COVID-19. COVID-19 has been associated with an
excess in all-cause and cardiovascular disease (CVD) mortality beyond that related to the infection itself and its immediate consequences. Studies in the
United Kingdom (UK) and United States of America (USA) have clearly shown increasing deaths from ischemic heart disease, stroke and hypertensive disease due to COVID-19. Overall, the impact has been greater in individuals with lower socioeconomic status, even in high income nations.
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Guidelines for the management of asthma in adults and adolescents: Position statement of the South African Thoracic Society – 2021 update
Lalloo, U.G.; Kalla, I.S.; Abdool-Gaffar, S. et al.
African Journal of Thoracic and Critical Care Medicine
(2021)
CC
sthma prevalence is increasing worldwide, and surveys indicate that most patients in developed and developing countries, including South Africa, do not receive optimal care and are therefore not well controlled. Standard management guidelines adapted to in-country realities are important to support
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optimal care. The South African Thoracic Society (SATS) first published a guideline for the management of chronic persistent asthma in 1992, which has subsequently been revised several times.
The main aim of the present document was to revise and update SATS’ statement on the suggested management of chronic asthma, based on the need to promote optimal care and control of asthma, together with the incorporation of new concepts and drug developments. This revised document reinforces optimal care and incorporates the following primary objectives to achieve the recent advances in asthma care:
• continued emphasis on the use of inhaled corticosteroids (ICS) as the foundation of asthma treatment
• to reduce the reliance on short-acting beta-2 agonist (SABA) monotherapy for asthma symptoms
• to incorporate the evidence and strategy for the use of the combination of an ICS and formoterol for acute symptom relief (instead of a SABA)
• to incorporate the evidence and strategy for the use of as-needed ICS-long-acting beta agonists (LABA) for patients with infrequent symptoms or ‘mild’ asthma
• to incorporate the evidence and strategy for the use of a long-acting muscarinic antagonist (LAMA) in combination with ICS-LABA; and
• to incorporate the evidence and strategy for the use of and management with a biologic therapy in severe asthma.
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Communicable and non-communicable diseases in Africa in 2021/22
World Health Organization Africa Region; WHO Africa
World Health Organization Africa Region; WHO Africa
(2023)
C_WHO
This report is one of the first major products of the newly established Precision Public Health Metrics unit of the UCN cluster of the WHO Regional Office for Africa. The report presents national trends in communicable and non-communicable disease burden and
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control in the WHO African region. It tracks progress made with respect to disease burden reduction, elimination and eradication. It also highlights major emerging threats, opportunities and priorities in the fight against commu- nicable and non-communicable diseases in the region. It covers the period 2000-2022, but for some indicators, information is available only up to 2021.
The report shows the number of reported cases for malaria and vaccine preventable diseases (meningitis, measles, yellow fever, pertussis, diphtheria, tetanus, and polio); disease incidence due to HIV, tuberculosis and four major noncommunicable diseases (cardiovas- cular diseases, cancers, diabetes and chronic respira- tory diseases).
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The World Health Organization provides regional and national strategies and operational plans that aim to support countries in work to achieve measles control and elimination. These are guided by high level frameworks including the Immunization Agen
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da 2030 and the Measles and Rubella Strategic Framework 2021–2030. These frameworks promote improvements in routine immunization programmes to reach all children, reduce immunity gaps and prevent outbreaks within the context of universal health care.
This interim guidance on Targeted and selective strategies in measles and rubella vaccination campaigns adds to the suite of guidance documents. It provides expanded description of methods to determine age groups for inclusion in preventive and outbreak response measles and rubella vaccination campaigns; and operational considerations that are specific to targeted and selective strategies in measles and rubella vaccination campaigns. This guidance also updates definitions for tailored, targeted and selective campaigns.The World Health Organization provides regional and national strategies and operational plans that aim to support countries in work to achieve measles control and elimination. These are guided by high level frameworks including the Immunization Agenda 2030 and the Measles and Rubella Strategic Framework 2021–2030. These frameworks promote improvements in routine immunization programmes to reach all children, reduce immunity gaps and prevent outbreaks within the context of universal health care.
This interim guidance on Targeted and selective strategies in measles and rubella vaccination campaigns adds to the suite of guidance documents. It provides expanded description of methods to determine age groups for inclusion in preventive and outbreak response measles and rubella vaccination campaigns; and operational considerations that are specific to targeted and selective strategies in measles and rubella vaccination campaigns. This guidance also updates definitions for tailored, targeted and selective campaigns.
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PLoS Negl TropDis14(10): e0008837. https://doi.org/ 10.1371/journal.pntd.0008837.
We conducted alandscape analysis on parasitic and vector-borne disease elimination approaches with the aim toidentify evidence-based strategies, core components and key concepts for achieving and sustaining schistosom
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iasis control and for progressing elimination efforts towards interruption oftransmission insubSaharan Africa.
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HAT diagnosis relies on laboratory techniques because clinical signs and symptoms are unspecific. Serodiagnostic tests exist only for Tbg and are based on the detection of specific antibodies, thus they are not confirmatory of infection. With the cu
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rrent low disease prevalence, the positive predictive value of serological tests is particularly low. Field-applicable tools include the card agglutination test for trypanosomiasis (CATT) used mainly in active screening by specialized mobile teams, and the rapid diagnostic tests that are more suitable for individual testing at point-of-care.
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The Strategic Malaria Communication Guide for Central America is intended to facilitate the shift from malaria control to elimination by strengthening communication and advocacy initiatives throughout the region. Based on interviews and a review of
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literature, the guide offers National Malaria Programmes (NMPs) recommendations on messaging, target audiences, communication channels and advocacy strategies. The guide's primary goals are to raise awareness of malaria elimination, encourage long-term commitment from decision-makers and mobilise sustainable resources. The guide outlines two strategic objectives: (1) creating a shared understanding of the long-term requirements for malaria elimination, including funding, surveillance and multi-sectoral engagement, and (2) expanding support among public, private and cross-sectoral stakeholders. With malaria cases having already reduced by 88% since 2000, the guide emphasises the importance of maintaining focus and investment in order to fully eliminate the disease and prevent its re-establishment in Central America.
Accessed on 10/06/2025.
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The framework recommends expanded coverage of malaria diagnostic and treatment services, intensified vector control to drive down transmission, strengthened malaria surveillance, and increased transborder collaboration, especially in terms of effort
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s to control the sale and use of artemisinin monotherapies. Since it is unlikely that national malaria control programs will be able to implement all the activities described in this framework simultaneously, a list of suggested priority activities has been included in the Annex.
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20 YEARS OF STRATEGIC HIV AND PUBLIC HEALTH DATA . beThe completion of the 6th South African National HIV Prevalence, Incidence and Behaviour Survey (SABSSM) report, coincides with the celebration of 30 years of democracy in South Africa; and marks 20 years of conducting nationally representative ho
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usehold-based surveys by the Human Sciences Research Council (HSRC), its collaborators and donors. Since its inception in 2002, the SABSSM series has emerged as one of the HSRC’s leading scientific contributions to the country’s HIV and AIDS response (1), providing essential data to monitor the HIV epidemic, the impact of the HIV program in South Africa, and to inform strategies for epidemic control in the National Strategic Plan for HIV, TB and STIs (NSP), now in its fifth edition. Using scientific evidence from SABSSM and other key sources, the NSP guides the country’s response, under the leadership of the South African AIDS Council (SANAC) and the National Department of Health (NDoH), with focus on equitable access to biomedical interventions, addressing the structural and social behavioural drivers of the epidemic, and targeting populations disproportionately affected by HIV; such as, black Africans, key populations and adolescent girls and young women (AGYW) aged 15–24 years (2).
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Continuum of HIV services refers to a comprehensive package of HIV prevention, diagnostic, treatment, care and support services provided for people at risk of infection or living with HIV and their families. This revised edition of the guidelines f
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or use of ARV and opportunistic infection
(OI) drugs in adults, adolescents and children is based on recent national and
global evidences and experiences. The Federal Ministry of Health believes that
these guidelines, along with other national guidelines and training manuals, will be
instrumental in maintaining the standard of care and ensuring quality of HIV service
delivery.
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This study provides experimental evidence that the MTV Shuga series improved knowledge and attitudes of viewers, as well as increased HIV testing and reduced risky sexual behaviors of Nigerian youth. The show substantially reduced new infections of Chlamydia, a common sexually transmitted
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infection in the study population.
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This issue brief aims to provide a comprehensive overview of key publications, guidelines, and practical materials on malaria prevention, diagnosis, and treatment. The selected documents reflect current evidence and field-based experiences, supporting healthcare professionals, researchers, and publ
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ic health authorities in their efforts to control and eliminate malaria.
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Filoviral hemorrhagic fever (FHF) is caused by ebolaviruses and marburgviruses, which both belongto the family Filoviridae. Egyptian fruit bats (Rousettus aegyptiacus) are the most likely natural reservoir for marburg viruses and entry into caves and mines that they stay in has often been associated
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with outbreaks of MVD. On the other hand, the natural reservoir for ebola viruses remains elusive;however, handling of wild animal carcasses has been associated with some outbreaks of EVD. In thelast two decades, there has been an increase in the incidence of FHF outbreaks in Africa, some beingcaused by a newly found virus and some occurring in previously unaffected areas such as Guinea, Liberia and Sierra Leone, in which the most recent EVD outbreak occurred in 2014. Indeed, the predicted geographic distribution of filoviruses and their potential reservoirs in Africa includes manycountries in which FHF has not been reported. To minimize the risk of virus dissemination inpreviously unaffected areas, there is a need for increased investment in health infrastructure in African countries, policies to facilitate collaboration between health authorities from different countries, implementation of outbreak control measures by relevant multi-disciplinary teams and education of the populations at risk.
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This 2011 update of Guidelines for the programmatic management of drug-resistant tuberculosis is intended as a tool for use by public health professionals working in response
to the Sixty-second World Health Assembly’s resolution on prevention and contr
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ol of multidrug-resistant tuberculosis and extensively drug-resistant tuberculosis.
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