Risk Communication and Community Engagement messages
Testing Guidance and Interpretation of Results for Healthcare Providers
Zika Virus Testing Guidance: Asymptomatic Pregnant Women
with Possible Zika Virus Exposure
Malaria Journal (2018) 17:460 https://doi.org/10.1186/s12936-018-2606-9
In malaria endemic countries, asymptomatic cases constitute an important reservoir of infections sustaining transmission. Estimating the burden of the asymptomatic population and identifying areas with elevated risk is import...ant for malaria control in Burkina Faso.
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ل المتلازمة التنفسية الحادة ٢خطر انتقال فيروس كورونا المستجدعلى مدى الأسابيع الماضية، كان هناك اهتمام واسع من جانب وسائل الإعلام حو [فيروس السارس ) من قبل الأفراد ع...ديمي الأعراض. وقد نوقشت هذه الحالة SARS-CoV2الوخيمة (ا على نطاق واسع على منصات مختلفة على مستوى العالم. الغرض من بيان ًأيضAfricaهذا الموقف هو أن تقوم المراكز الأفريقية لمكافحة الأمراض و الوقاية منها ( المتلازمة التنفسية الحادة الوخيمة ٢) بتوضيح حالة انتقال فيروس السارس CDCالأعراض.] عن طريق الأفراد ما قبل الإصابة بالأعراض والأفراد عديميSARS-CoV2[
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Over the past weeks, there has been wide media attention on the risk of transmission of the novel coronavirus [severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)] by asymptomatic individuals. This situation has also been extensively discussed on various platforms globally. The purpose of t...his position statement is for the Africa Centres for Diseases Control and Prevention (Africa CDC) to clarify the situation of transmission of SARS-CoV-2 by pre-asymptomatic and asymptomatic Individuals.
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Tropical Medicine and Infectious Disease 2017, 2(4), 50
This is a cross-sectional analysis of baseline data in a longitudinal study on asymptomatic, LF antigen-positive and -negative young people in Myanmar. Rapid field screening was used to identify antigen-positive cases and a group of antige...n-negative controls of similar age and gender were invited to continue in the study. ... Results demonstrate that sub-clinical changes associated with infection can be detected in asymptomatic cases. Further exploration of these low-cost devices in clinical and research settings on filariasis-related lymphedema are warranted.
https://doi.org/10.3390/tropicalmed2040050
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Chagas Disease (CD) affects 6–7 million people worldwide and isrelated topoverty-promo ting conditions. Chronic asymptomatic cases are mostly invisible tohealth systems. Aiming totranslate CD discoveries into education/information practices toraise alertness and empowerment ofaffected people; and ...toperform an active search of CD cases, articulating intersectoral actions toimprove the access ofinfected people tothe local health service for the treatment of CD; our research group developed and tested under field conditions as innovative social technology: an itinerant education interdisciplinarysetting named “Chagas Express XXI”
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Wearing a face mask can help reduce the spread of COVID-19 in the community by reducing the release of respiratory droplets from asymptomatic / pre-symptomatic individuals or those with mild non-specific symptoms. The use of face masks for this purpose may be adopted to reduce the societal impact as...sociated with absence from work or healthcare pressures due to infection, or to protect vulnerable individuals in particular settings.
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Fact Sheet, May 2018.
Nipah virus (NiV) is a zoonotic virus (it is transmitted from animals to humans) and can also be transmitted through contaminated food or directly between people. In infected people, it causes a range of illnesses from asymptomatic (subclinical) infection to acute respiratory ...illness and fatal encephalitis. The virus can also cause severe disease in animals such as pigs, resulting in significant economic losses for farmers
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The purpose of cancer screening tests is to detect pre-cancer or early-stage cancer in asymptomatic individuals so that timely diagnosis and early treatment can be offered, where this treatment can lead to better outcomes for some people.
The aim of a cancer screening programme is either to reduc...e mortality and morbidity in a population by early detection and early treatment of a cancer (for example, breast screening) or to reduce the incidence of a cancer by identifying and treating its precursors (such as cervical and colorectal screening).
This short guide is designed to be a quick reference that contains the important ideas about cancer screening. Readers should refer to other publications for comprehensive discussion and detailed guidance on cancer screening programmes.
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For COVID-19, as for many infectious diseases, the true level of transmission is frequently underestimated because a substantial proportion of people with the infection are undetected either because they are asymptomatic or have only mild symptoms and thus typically fail to present at healthcare fac...ilities. There may also be neglected or under-served segments of the population who are less likely to access healthcare or testing. Under-detection of cases may be exacerbated during an epidemic, when testing capacity may be limited and restricted to people with severe cases and priority risk groups (such as frontline healthcare workers, elderly people and people with comorbidities). Cases may also be misdiagnosed and attributed to other diseases with similar clinical presentation, such as influenza.
Differences in mortality between groups of people and countries are important proxy indicators of relative risk of death that guide policy decisions regarding scarce medical resource allocation during the ongoing COVID-19 pandemic. This document is intended to help countries estimate CFR and, if possible, IFR, as appropriately and accurately as possible, while accounting for possible biases in their estimation
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Chagas is a parasitic disease that affects over 6 million people in the
world. As the disease typically remains asymptomatic for years, new cases
often go unnoticed and unreported, and most people with the disease
are unaware of their condition. Less than 10% of people affected are
diagnosed and... the vast majority do not receive the treatment they need.
If not treated, Chagas may cause irreversible, life-threatening damage to
the heart and other vital organs.
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Updated 2022. This guide addresses the care pathway from presentation of the patient to a health facility to patient discharge. It considers different levels of disease severity, from asymptomatic individuals to critically ill patients. Accounting for variations in the benefits and harms of chest im...aging in different situations, remarks are provided to describe the circumstances under which each recommendation would benefit patients. The guide also includes implementation considerations for different settings, provides suggestions for impact monitoring and evaluation and identifies knowledge gaps meriting further research.
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El reciente aumento de los casos de microcefalia y de otros trastornos neurológicos posiblemente asociados a la infección por el virus de Zika ha provocado un aumento de la demanda de pruebas de laboratorio para detectar dicha infección. Los grupos prioritarios para la realización de pruebas di...agnósticas son los pacientes sintomáticos y las embarazadas asintomáticas posiblemente expuestas al virus.
En el presente documento, que será revisado y actualizado cuando se disponga de más información, se ofrece orientación sobre las actuales estrategias relativas a la realización de pruebas para la infección por el virus de Zika.
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La enfermedad de Chagas es parasitaria y afecta a más de 6 millones
de personas en el mundo. Como normalmente es asintomática durante
años, los nuevos casos suelen no detectarse ni reportarse y la mayoría
de las personas con la enfermedad no tiene conciencia de su condición.
Se diagnostica ...a menos del 10% de las personas afectadas, y en su gran
mayoría estas no reciben el tratamiento que necesitan. Sin tratamiento,
la enfermedad de Chagas puede causar daños irreversibles al corazón y
otros órganos vitales, o la muerte.
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A century after its discovery, Chagas' disease still represents a major public health challenge in Latin America. Moreover, because of growing population movements, an increasing number of cases of imported Chagas' disease have now been detected in non-endemic areas, such as North America and some E...uropean countries. This parasitic zoonosis, caused by Trypanosoma cruzi, is transmitted to humans by infected Triatominae insects, or occasionally by non-vectorial mechanisms, such as blood transfusion, mother to fetus, or oral ingestion of materials contaminated with parasites. Following the acute phase of the infection, untreated individuals enter a chronic phase that is initially asymptomatic or clinically unapparent. Usually, a few decades later, 40-50% of patients develop progressive cardiomyopathy and/or motility disturbances of the oesophagus and colon. In the last decades several interventions targeting primary, secondary and tertiary prevention of Chagas' disease have been attempted. While control of both vectorial and blood transfusion transmission of T cruzi (primary prevention) has been successful in many regions of Latin America, early detection and aetiological treatment of asymptomatic subjects with Chagas' disease (secondary prevention) have been largely underutilised. At the same time, in patients with established chronic disease, several pharmacological and non-pharmacological interventions are currently available and have been increasingly used with the intention of preventing or delaying complications of the disease (tertiary prevention). In this review we discuss in detail each of these issues.
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The term leishmaniasis encompasses multiple clinical syndromes, including the cutaneous, mucosal, and visceral forms, which result from infection of macrophages in the dermis, in the naso-orpharyngeal mucosa, and throughout the reticuloendothelial system, respectively. The infection can range from a...symptomatic to severe in all of these forms. Cutaneous and mucosal leishmaniasis can cause severe morbidity; visceral and mucosal leishmaniasis can be life threatening.
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Glaucoma is a leading cause of irreversible blindness globally. In Malawi, glaucoma accounts for 15.8% of the blindness among people aged 50 years and above. Blindness from glaucoma is preventable with early detection and timely treatment. However, glaucoma management remains a challenge to eye care... providers due to its asymptomatic progression.
These guidelines inform eye care providers about the requirements for early detection of glaucoma, and the appropriate assessment and management of glaucoma patients. The guidelines also demonstrate the need for ophthalmologists to work with secondary-level eye care providers. With
glaucoma being a permanently blinding condition, it is vital to ensure that all eye care providers are adequately equipped with skills and resources for the early detection and management of glaucoma.
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The number of confirmed COVID-19 cases detected and reported in each country is influenced by
many factors including limited access and/or utilization of healthcare and COVID-19 testing, limited
surveillance, lack of knowledge amongst the population about when to seek testing, an asymptomatic pres...entation, and other unknown issues. This is true in all countries of the world, and not Africa specific, however there are factors unique to Africa which may also affect the way the virus behaves there. COVID-19 prevalence data are critical for planning effective mitigation strategies and understandingthe true impact of the disease and relevant intervention measures in Africa, which might be quite different from regions with a different population age distribution or risk factor profile.
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