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The World Health Organization (WHO) Global Tuberculosis Report 2021 estimated that, in 2020, tuberculosis (TB) was the second most common infectious disease killer after coronavirus disease (COVID-19) and the 13th leading cause of death (1). Twenty-five per cent (25%) of the world’s population has
...
latent TB infection, which can develop into disease. In 2020, WHO estimated that 9.9 million people fell ill with TB, but only about 5.8 million (60%) were diagnosed, reported and treated, an 18% fall from 7.1 million in 2019. WHO also estimates that, between 2019 and 2020, global TB mortality increased from 1.2 to 1.5 million, a 5.6% increase
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
...
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.
more
Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall
...
y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
more
Terminology used to describe the transmission of pathogens through the air varies across scientific disciplines, organizations and the general public. While this has been the case for decades, during the coronavirus disease (COVID-19) pandemic, the terms ‘airborne’, ‘airborne transmission’ a
...
nd ‘aerosol transmission’ were used in different ways by stakeholders in different scientific disciplines, which may have contributed to misleading information and confusion about how pathogens are transmitted in human populations.
This global technical consultation report brings together viewpoints from experts spanning a range of disciplines with the key objective of seeking consensus regarding the terminology used to describe the transmission of pathogens through the air that can potentially cause infection in humans.
This consultation aimed to identify terminology that could be understood and accepted by different technical disciplines. The agreed process was to develop a consensus document that could be endorsed by global agencies and entities. Despite the complex discussions and challenges, significant progress was made during the consultation process, particularly the consensus on a set of descriptors to describe how pathogens are transmitted through the air and the related modes of transmission. WHO recognizes the important areas where consensus was not achieved and will continue to address these areas in follow-up consultations.
more
Position statement for adult and paediatric spirometry in South Africa: 2022 update
Maree, D.M.; Swanepoel, R.A.; Swart, F. et al.
African Journal of Thoracic and Critical Care Medicine
(2022)
CC
Spirometry is required as part of the comprehensive evaluation of both adult and paediatric individuals with suspected or confirmed respiratory diseases and occupational assessments. It is used in the categorisation of impairment, grading of severity, assessment of potential progression and response
...
to interventions. Guidelines for spirometry in South Africa are required to improve the quality, standardisation and usefulness in local respiratory practice. The broad principles of spirometry have remained largely unchanged from previous versions of the South African Spirometry Guidelines; however, minor adjustments have been incorporated from more comprehensive international guidelines, including adoption of the Global Lung Function Initiative 2012 (GLI 2012) spirometry reference equations for the South African population.
All equipment should have proof of validation regarding resolution and consistency of the system. Daily calibration must be performed, and equipment quality control processes adhered to. It is important to have standard operating procedures to ensure consistency and quality and, additionally, strict infection control as highlighted during the COVID-19 pandemic.
Adequate spirometry relies on a competent, trained operator, accurate equipment, standardised operating procedures, quality control and patient co-operation. All manoeuvres must be performed strictly according to guidelines, and strict quality assurance methods should be in place, including acceptability criteria (for any given effort) and repeatability (between efforts).
more
Evidence shows that oral pre-exposure prophylaxis (PrEP) reduces the risk of contracting HIV during sexual intercourse by more than 90% when taken daily. It is for this reason the National HIV Prevention Strategy 2015-2020 (2018 Revision) emphasises the role of preexposure prophylaxis (PrEP) in
...
reducing new HIV infections in Malawi.
The Ministry of Health has prioritised PrEP use among the populations most at-risk of HIV infection in Malawi: young women ages 10 to 24 years, sero-discordant couples, female sex workers, men who have sex with men, and other priority populations (such as members of the uniformed services, prisoners, and mobile populations).
more
L’objectif des lignes directrices 2024 est de fournir des recommandations actualisées et fondées sur
des données probantes sur les principaux sujets prioritaires. Ceux-ci concernent notamment les critères élargis et simplifiés de mise sous traitement pour les adultes, mais aussi désormais
...
pour les adolescents, l’élargissement des critères d’éligibilité au traitement
antiviral prophylactique pour les femmes enceintes
afin de prévenir la transmission mère-enfant du VHB,
l’amélioration des tests de diagnostic de l’infection par le
VHB grâce à l’utilisation de tests de mesure de la charge
virale du VHB (ADN) sur le lieu de soins (“point-of-care
tests”) et d’approches réflexes pour la recherche de
l’ADN du VHB, et les critères pour déterminer à qui et
comment faire le test pour rechercher une infection par
le VHD.
more
People with diabetes mellitus are at an increased risk for foot ulcerations as a result of poorly controlled blood glucose which may lead to gangrene. These patients are at a high risk for lower limb amputations, higher healthcare costs, and lower quality of life. This course aims to cover the preve
...
ntion of foot ulcers in persons with diabetes, classification of diabetic foot ulcers, diagnosis and treatment of foot infection in people with diabetes and interventions to enhance healing of foot ulcers.
more
i. A person who is a contact of a probable or confirmed mpox case in the 21 days before the onset of signs or symptoms, and who presents with any of the following: acute onset of fever (>38.5°C), headache, myalgia (muscle pain/body aches), back pain, profound weakness or fatigue.
OR
ii. A per
...
son presenting since 01 January 2022 with an unexplained acute skin rash, mucosal lesions or lymphadenopathy (swollen lymph nodes). The skin rash may include single or multiple lesions in the ano-genital region or elsewhere on the body. Mucosal lesions may include single or multiple oral, conjunctival, urethral, penile, vaginal, or ano-rectal lesions. Ano-rectal lesions can also manifest as ano-rectal inflammation (proctitis), pain and/or bleeding.
AND
for which the following common causes of acute rash or skin lesions do not fully explain the clinical picture: varicella zoster, herpes zoster, measles, herpes simplex, bacterial skin infections, disseminated gonococcus infection, primary or secondary syphilis, chancroid, lymphogranuloma venereum, granuloma inguinale, molluscum contagiosum, allergic reaction (e.g., to plants); and any other locally relevant common causes of papular or vesicular rash.
more
This threat assessment addresses the implications of the ongoing Marburg virus disease (MVD) outbreak in
Rwanda for the European Union/European Economic Area (EU/EEA). MVD is a severe disease in humans and,
although uncommon, it has the potential to cause epidemics with significant case fatality.
...
All recorded MVD
outbreaks to date have originated in Africa. MVD is not an airborne disease and is considered not to be
contagious before symptoms appear. Direct contact with the blood and other body fluids of infected people
and animals or indirect contact with contaminated surfaces and materials like clothing, bedding and medical
equipment is required for transmission. The risk of infection is minimised when proper infection prevention and
control precautions are strictly followed. There is no approved treatment or vaccine for MVD; however, several
pharmaceuticals and candidate MVD vaccines are under investigation.
more
Mpox is an emerging zoonotic disease caused by the mpox virus, a member of the Orthopoxvirus genus closely related to the variola virus that causes smallpox. Mpox was first discovered in 1958 when outbreaks of a pox-like disease occurred in monkeys kept for research. The first human case was recorde
...
d in 1970 in the Democratic Republic of the Congo (DRC) during a period of intensified effort to eliminate smallpox and since then the infection has been reported in a number of African countries. Mpox can spread in humans through close contact, usually skin-to-skin contact, including sexual contact, with an infected person or animal, as well as with materials contaminated with the virus such as clothing, beddings and towels, and respiratory droplets in prolonged face to face contact. People remain infectious from the onset of symptoms until all the lesions have scabbed and healed. The virus may spread from infected animals through handling infected meat or through bites or scratches. Diagnosis is confirmed by polymerase chain reaction (PCR) testing of material from a lesion for the virus’s DNA. Two separate clades of the mpox virus are currently circulating in Africa: Clade I, which includes subclades Ia and Ib, and Clade II, comprising subclades IIa and IIb. Clade Ia and Clade Ib have been associated with ongoing human-to-human transmission and are presently responsible for outbreaks in the Democratic Republic of the Congo (DRC), while Clade Ib is also contributing to outbreaks in Burundi and other countries.
In 2022‒2023 mpox caused a global outbreak in over 110 countries, most of which had no previous history of the disease, primarily driven by human-to-human transmission of clade II through sexual contact. In just over a year, over 90,000 cases and 150 deaths were reported to the WHO. For the second time since 2022, mpox has been declared a global health emergency as the virus spreads rapidly across the African continent. On 13 Aug 2024, Africa CDC declared the ongoing mpox outbreak a Public Health Emergency of Continental Security (PHECS), marking the first such declaration by the agency since its inception in 2017.7 This declaration empowered the Africa CDC to lead and coordinate responses to the mpox outbreak across affected African countries. On August 14, 2024, the WHO declared the resurgence of mpox a Public Health Emergency of International Concern (PHEIC) emphasizing the need for coordinated international response.
As of August 2024, Mpox has expanded beyond its traditional endemic regions, with new cases reported in countries including Sweden, Thailand, the Philippines, and Pakistan. Sweden has confirmed its first case of Clade 1 variant, which has been rapidly spreading in Africa, particularly in DRC. The emergence of this new variant raises concerns about its potential for higher lethality and transmission rates outside Africa.
more
Accessed on 22.03.2020
Le Gouvernement du Burkina Faso a pris en compte au niveau du deuxième axe stratégique du Plan National de Développement Economique et Social (PNDES) 2016 – 2020 la nécessité de développer des actions allant dans le sens de la mitigation de l’impact du VIH sur les
...
populations. Deux CSLS successifs couvrant les périodes 2001-2005 et 2006 – 2010 ont été mis en œuvre contribuant de manière significative à baisser et à stabiliser la progression de la pandémie, en ramenant le taux de séroprévalence de 7,17% en 1997 à 0.90% en fin 2014 selon les estimations de l’ONUSIDA. Malgré cette évolution positive, le Burkina Faso demeure en situation d’épidémie généralisée. Ce même rapport mentionne que le nombre de PVVIH est estimé à 110.000, dont 57.000 femmes. 75.000 enfants sont estimés orphelins du fait du Sida. L’EDS IV réalisée en 2010 note que la prévalence en population générale présente des disparités selon le sexe. En effet, les femmes ont une prévalence de 1.2% contre 0.8% chez les hommes d’où un ratio H/F de 1.5 confirmant ainsi la théorie de la féminisation de l’infection pour des raisons à la fois socio-économiques et biologiques. Une étude récente conduite par le SP/CNLS ciblant les travailleuses du sexe (TS) a montré une prévalence au VIH de 16,19%, c’est à dire plus de 16 fois celle en population générale.
more
Job satisfaction among healthcare workers in Ghana and Kenya during the COVID-19 pandemic: Role of perceived preparedness, stress, and burnout
Afulani PA, Nutor JJ, Agbadi P, Gyamerah AO, Musana J, Aborigo RA, et al.
PLOS Global Public Health
(2021)
CC
The COVID-19 pandemic has affected job satisfaction among healthcare workers; yet this has not been empirically examined in sub-Saharan Africa (SSA). We addressed this gap by examining job satisfaction and associated factors among healthcare workers in Ghana and Kenya during the COVID-19 pandemic. W
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e conducted a cross-sectional study with healthcare workers (N = 1012). The two phased data collection included: (1) survey data collected in Ghana from April 17 to May 31, 2020, and (2) survey data collected in Ghana and Kenya from November 9, 2020, to March 8, 2021. We utilized a quantitative measure of job satisfaction, as well as validated psychosocial measures of perceived preparedness, stress, and burnout; and conducted descriptive, bivariable, and multivariable analysis using ordered logistic regression. We found high levels of job dissatisfaction (38.1%), low perceived preparedness (62.2%), stress (70.5%), and burnout (69.4%) among providers. High perceived preparedness was positively associated with higher job satisfaction (adjusted proportional odds ratio (APOR) = 2.83, CI [1.66,4.84]); while high stress and burnout were associated with lower job satisfaction (APOR = 0.18, CI [0.09,0.37] and APOR = 0.38, CI [0.252,0.583] for high stress and burnout respectively). Other factors positively associated with job satisfaction included prior job satisfaction, perceived appreciation from management, and perceived communication from management. Fear of infection was negatively associated with job satisfaction. The COVID-19 pandemic has negatively impacted job satisfaction among healthcare workers. Inadequate preparedness, stress, and burnout are significant contributing factors. Given the already strained healthcare system and low morale among healthcare workers in SSA, efforts are needed to increase preparedness, better manage stress and burnout, and improve job satisfaction, especially during the pandemic.
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Int. J. Environ. Res. Public Health 2022, 19, 9313. https://doi.org/10.3390/ijerph19159313. A mixed-methods study, using an online survey and in-depth interviews, was conducted. Participants included Mental Health Focal Points at the Ministries of Health, the World Health Organization (WHO) country
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and regional offices, and civil society representatives. Responses were received from 28 countries out of 55 contacted. The implementation level, based on standard guidelines, of MHPSS activities was below 50% in most countries. The most implemented MHPSS activities were establishing coordination groups (57%) and developing MHPSS strategy (45%), while the least implemented activities included implementing the developed MHPSS strategy (32%) and establishing monitoring and evaluation mechanisms (21%). Key factors that hindered implementing MHPSS activities included lack of political commitment and low prioritisation of mental health during emergencies, as it was seen as a “less important” issue during the COVID-19 pandemic, when more importance was given to infection prevention and control (IPC)
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Antimicrobial resistance (AMR) is a threat to global health and development and it contributes to millions of deaths worldwide each year. Inappropriate use and overuse of antibiotics are driving an increase in AMR and have a detrimental impact on the effectiveness of these critical medicines. Throug
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h the Global Action Plan on AMR, WHO is working to improve the surveillance of antimicrobial resistance and reduce inappropriate antibiotic consumption.
There is a recognized need for high-quality resources to improve antibiotic prescribing globally. To address this need, a pragmatic approach was taken by WHO to develop actionable guidance for empiric antibiotic use.
The WHO AWaRe (Access, Watch, Reserve) antibiotic book provides concise, evidence-based guidance on the choice of antibiotic, dose, route of administration, and duration of treatment for more than 30 of the most common clinical infections in children and adults in both primary health care and hospital settings. The information included in the book supports the recommendations for antibiotics listed on the WHO Model Lists of Essential Medicines and Essential Medicines Children and the WHO AWaRe classification of antibiotics.
The WHO AWaRe antibiotic book is accompanied by summary infographics for each infection for both adults and children that provide a quick-reference guide for health care workers at the point of care.
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This review focusses on the interactions between the etiologic agent of Chagas disease, Trypanosoma cruzi, and its triatomine vector. The flagellate mainly colonizes the intestinal tract of the insect. The effect of triatomines on trypanosomes is indicated by susceptibility and refractoriness phenom
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ena that vary according to the combination of the strains. Other effects are apparent in the different regions of the gut. In the stomach, the majority of ingested blood trypomastigotes are killed while the remaining transform to round stages. In the small intestine, these develop into epimastigotes, the main replicative stage. In the rectum, the population density is the highest and is where the infectious stage develops, the metacyclic trypomastigote. In all regions of the gut, starvation and feeding of the triatomine affect T. cruzi. In the small intestine and rectum, starvation reduces the population density and more spheromastigotes develop. In the rectum, feeding after short-term starvation induces metacyclogenesis and after long-term starvation the development of specific cells, containing several nuclei, kinetoplasts and flagella. When considering the effects of T. cruzi on triatomines, the flagellate seems to be of low pathogenicity. However, during stressful periods, which are normal in natural populations, effects occur often on the behaviour, eg, in readiness to approach the host, the period of time before defecation, dispersal and aggregation. In nymphs, the duration of the different instars and the mortality rates increase, but this seems to be induced by repeated infections or blood quality by the feeding on infected hosts. Starvation resistance is often reduced by infection. Longevity and reproduction of adults is reduced, but only after infection with some strains of T. cruzi. Only components of the surface coat of blood trypomastigotes induce an immune reaction. However, this seems to act against gut bacteria and favours the development of T. cruzi.
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Principaux faits
D’après les estimations, 6 à 7 millions de personnes dans le monde sont infectées par Trypanosoma cruzi (T. Cruzi), le parasite responsable de la maladie de Chagas. La plupart de ces personnes vivent en Amérique latine.
La transmission à l’être humain se fait principalem
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ent, en Amérique latine, par l’intermédiaire d’un insecte appelé triatome, qui peut être porteur de T. cruzi.
Parmi les autres modes de transmission de la maladie de Chagas, figurent : la transmission orale (par voie alimentaire), la transfusion de sang ou de produits sanguins, la transmission mère-enfant (congénitale), la transplantation d’organes et les accidents de laboratoire.
La maladie de Chagas ne touchait auparavant que des zones rurales de la Région des Amériques, et surtout de l’Amérique latine. Ces dernières décennies, toutefois, les mouvements de population ont fait que la plupart des personnes infectées sont des habitants de zones urbaines (urbanisation) et que la maladie s’est propagée à d’autres continents (où T. cruzi se transmet par des voies non vectorielles).
L’infection à T. cruzi est curable si un traitement est instauré rapidement après l’infection.
Chez les personnes infectées de façon chronique, un traitement antiparasitaire peut éventuellement prévenir ou enrayer la progression de la maladie, et éviter sa transmission, notamment de la mère à l’enfant.
Jusqu’à 30 % des personnes infectées de façon chronique présentent des troubles cardiaques, et jusqu’à 10 % d’entre elles souffrent de troubles digestifs et/ou neurologiques, ce qui peut imposer un traitement particulier.
Les principales méthodes de prévention de la maladie de Chagas en Amérique latine sont la lutte antivectorielle ainsi que d’autres stratégies visant à réduire la transmission vectorielle.
Dans le monde entier, le dépistage sanguin joue un rôle crucial dans la prévention de l’infection par transfusion ou transplantation d’organes.
Il est essentiel de détecter et de traiter l’infection chez les femmes et les filles en âge de procréer, ainsi que de soumettre tout nouveau-né et ses frères et sœurs à un dépistage dans le cas où la mère est infectée et n’a jamais reçu de traitement antiparasitaire.
Certains facteurs socio-économiques et environnementaux influent fortement sur la maladie de Chagas, dont la propagation et les différentes dimensions interdépendantes justifient la nécessité de mettre en œuvre des stratégies de lutte multisectorielles.
Quelques pays ont mis en place la notification et la surveillance des cas aigus et chroniques et des voies de transmission actives, qui sont essentielles à la lutte contre la maladie de Chagas.
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Antimicrobial resistance (AMR) is a global human, animal, plant and environment health threat that needs to be addressed by every country. The impacts of AMR are wide-ranging in terms of human health, animal health, food security and safety, environmental effects on ecosystems and biodiversity, and
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socioeconomic development. Just like the climate crisis, AMR poses a significant threat to the delivery of the 2030 Agenda for Sustainable Development. The response to the AMR crisis has been spearheaded through the global action plan on antimicrobial resistance (GAP-AMR), developed by the World Health Organization (WHO) in 2015, in close collaboration with the Food and Agriculture Organization of the United Nations (FAO) and the World Organisation for Animal Health (WOAH), and formally endorsed by the three organizations’ governing bodies and by the Political Declaration of the high-level meeting of the United Nations General Assembly on AMR in 2016. In 2022, the three organizations officially became the Quadripartite by welcoming the United Nations Environment Programme (UNEP) into the alliance “to accelerate coordination strategy on human, animal and ecosystem health”.
The aim of the GAP-AMR is to ensure the continuity of successful treatment with effective and safe medicines.
Its strategic objectives include:
• improving the awareness and understanding of AMR;
• strengthening the knowledge and evidence base through surveillance and research;
• reducing the incidence of infection through effective sanitation, hygiene and infection prevention measures; optimizing the use of antimicrobial medicines in human and animal health; and
• developing the economic case for sustainable investment that takes account of the needs of all countries and increasing investment in new medicines, diagnostic tools, vaccines and other interventions.
With the adoption of the GAP-AMR, countries agreed to develop national action plans (NAPs) aligned with the GAP-AMR to mainstream AMR interventions nationally. Individually, the Quadripartite took action to advance AMR interventions in their respective sectors. FAO adopted a resolution on AMR recognizing that it poses an increasingly serious threat to public health and sustainable food production, and developed an AMR action plan to support the resolution’s implementation. For its part, WOAH developed a strategy on AMR aligned with the GAP-AMR, acknowledging the importance of a One Health approach to AMR. Similarly, more recently, UNEP’s governing body, the United Nations Environment Assembly, recognized that AMR is a current and increasing threat and a challenge to global health, food security and the sustainable development of all countries, and welcomed the GAP-AMR and the NAPs developed in accordance with its five overarching strategic objectives
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Antimicrobial resistance (AMR) has emerged as a leading cause of death in the African region, surpassing fatalities from malaria, HIV, and TB. In response to this critical threat, the region has adopted the AMR Global Action Plan and the African Union Framework for Antimicrobial Resistance Control 2
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020 – 2025, which is tailored to meet the specific needs of African nations through a coordinated approach. While most countries in the region have developed and prioritized National Action Plans (NAPs) to tackle AMR, the overall response remains inadequate given the magnitude of the threat, which endangers human, animal, environmental, aquatic, and plant health.
Africa bears a significant burden of infectious diseases, accounting for approximately 95% of malaria deaths, 70% of people living with HIV, and 25% of TB deaths globally. In 2019, AMR was linked to approximately 55,000 deaths from HIV, 30,000 from malaria, and 255,000 overall. Major drivers of AMR in the region include the overuse and misuse of antimicrobials in human and food systems, migration, suboptimal vaccination rates, and environmental contamination from hospital and pharmaceutical effluents. Additionally, there is a lack of access to quality-assured antimicrobials and diagnostics, compounded by inadequate knowledge about AMR. Unlike high-income countries, where indiscriminate antimicrobial use is the primary factor driving AMR, African countries face additional challenges, including a lack of access to clean and safe water, poor Water, Sanitation, and Hygiene (WASH) programs, inadequate infection prevention measures, and suboptimal vaccinations for preventable diseases. One in three hospitals in the region lacks clean, safe running water, and one in eight people defecate openly due to inadequate sanitation. Investments in WASH, infection prevention, and biosecurity could save approximately 700,000 lives annually.
Addressing AMR in Africa requires a comprehensive, multi-sectoral approach involving the entire society. Sustainable access to antimicrobials, including antibiotics, vaccines, and therapeutics, is crucial, as lack of access leads to more morbidity and mortality than AMR itself. Support for the region should focus on preventing infections, strengthening health and food systems, developing human resources, ensuring sustainable access to diagnostics and therapeutics, and investing in laboratory infrastructure to support surveillance and data generation.
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WEEKLY EPIDEMIOLOGICAL RECORD, NO 23, 7 JUNE 2024, pp.307-318
The most recent estimate of the global number of deaths from dog-mediatedrabies is 59 000 per year.1 Rabies is associated with a 99.9% fatality rate and severe trauma in families in which a rabies death
occurs, and remains a major publ
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ic health concern in most of Africa and Asia and some parts of South America
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