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.
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Asthma is the commonest chronic respiratory tract disease in children. In low-income countries, challenges exist in asthma diagnosis. In surveys done in children, the prevalence of ‘asthma’ defined by symptoms is high compared to ‘doctor diagnosed asthma’. The questions answered by this revi...ew are What challenges have been experienced in the diagnosis of asthma in children? What solutions will address these challenges?
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The "Global NCD action plan" provides a road map and a menu of policy options for countries to take in order to attain the 9 voluntary global targets, including that of a 25% relative reduction in premature mortality from cardiovascular diseases, cancer, diabetes or chronic respiratory diseases by 2...025. The main focus of this action plan is on 4 types of NCDs (cardiovascular diseases, cancer, chronic respiratory diseases, diabetes) which make the largest contribution to morbidity and mortality due to NCDs, and on 4 shared behavioural risk factors (tobacco use, unhealthy diet, physical inactivity, harmful use of alcohol).
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Noncommunicable diseases (NCDs) – chief among them, cardiovascular diseases (heart disease and stroke), cancer, diabetes and chronic respiratory diseases – cause nearly three-quarters of deaths in the world. Their drivers are social, environmental, commercial and genetic, and their presence is g...lobal. Every year 17 million people under the age of 70 die of NCDs, and 86% of them live in low- and middle-income countries.
Users can explore the data below by country, accessing detailed information on noncommunicable diseases and their key risk factors
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Chronic respiratory diseases, such as asthma and
chronic obstructive pulmonary disease, kill more than
four million people every year and affect hundreds
of millions more. These diseases erode the health
and well-being of the patients and have a negative
impact on families and societies. Women ...and
children are particularly vulnerable, especially those
in low and middle income countries, where they are
exposed on a daily basis to indoor air pollution from
solid fuels for cooking and heating. In high income
countries, tobacco is the most important risk factor
for chronic respiratory diseases, and in some of
these countries, tobacco use among women and
young people is still increasing.
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The article outlines the prioritized research agenda for the prevention and control of chronic respiratory diseases (CRDs) as part of the World Health Organization's (WHO) action plan on noncommunicable diseases (NCDs) from 2008 to 2013. It highlights the significant global impact of CRDs, including... asthma, chronic obstructive pulmonary disease (COPD), and other related conditions, particularly in low- and middle-income countries (LMICs). The document stresses the need for effective prevention strategies and better surveillance, as well as enhanced healthcare infrastructure and resources in LMICs. It calls for research into CRD risk factors, effective interventions, and integrated care approaches that align with broader NCD prevention programs. The article emphasizes the importance of public health initiatives and cross-sector collaborations to reduce the disease burden and improve patient outcomes.
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The "Global NCD action plan" provides a road map and a menu of policy options for countries to take in order to attain the 9 voluntary global targets, including that of a 25% relative reduction in premature mortality from cardiovascular diseases, cancer, diabetes or chronic respiratory diseases by 2...025. The main focus of this action plan is on 4 types of NCDs (cardiovascular diseases, cancer, chronic respiratory diseases, diabetes) which make the largest contribution to morbidity and mortality due to NCDs, and on 4 shared behavioural risk factors (tobacco use, unhealthy diet, physical inactivity, harmful use of alcohol).
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Childhood Respiratory Diseases & the Environment learning objectives
•To understand how the respiratory tract is affected by the environment
•To describe respiratory diseases linked to the environment
•To list one population-level intervention and one personal-level intervention for d...ecreasing risk of respiratory diseases
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There is increasing interest in understanding the role of air pollution as one of the greatest threats to human health worldwide. Nine of 10 individuals breathe air with polluted compounds that have a great impact on lung tissue. The nature of the relationship is complex, and new or updated data are... constantly being reported in the literature. The goal of our review was to summarize the most important air pollutants and their impact on the main respiratory diseases (chronic obstructive pulmonary disease, asthma, lung cancer, idiopathic pulmonary fibrosis, respiratory infections, bronchiectasis, tuberculosis) to reduce both short- and the long-term exposure consequences. We considered the most important air pollutants, including sulfur dioxide, nitrogen dioxide, carbon monoxide, volatile organic compounds, ozone, particulate matter and biomass smoke, and observed their impact on pulmonary pathologies. We focused on respiratory pathologies, because air pollution potentiates the increase in respiratory diseases, and the evidence that air pollutants have a detrimental effect is growing. It is imperative to constantly improve policy initiatives on air quality in both high- and low-income countries.
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Policy Brief | April 2015 | This brief accompanies the data sheet, Addressing Risk Factors for Noncommunicable Diseases Among Young People in Africa: Key to Prevention and Sustainable Development, and its data appendix, which provide all available country-specific data on four key NCD risk factors a...mong young people in Africa since 2004. These publications extend an earlier publication, Noncommunicable Disease Risk Factors Among Young People in Africa: Data Availability and Sources. All are available at www.prb.org/Publications/Datasheets/2015/ncd-risk-youth-africa.aspx.
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Aerosol pollutants are known to raise the risk of development of non-communicable respiratory diseases (NCRDs) such as asthma, chronic bronchitis, chronic obstructive pulmonary disease, and allergic rhinitis. Sub-Saharan Africa’s rapid pace of urbanization, economic expansion, and population growt...h raise concerns of increasing incidence of NCRDs. This research characterizes the state of research on pollution and NCRDs in the 46 countries of Sub-Saharan Africa (SSA). This research systematically reviewed the literature on studies of asthma; chronic bronchitis; allergic rhinitis; and air pollutants such as particulate matter, ozone, NOx, and sulfuric oxide.
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The Global Action Plan for the Prevention and Control of Noncommunicable Diseases 2013-2020 by the World Health Organization (WHO) outlines a comprehensive strategy to address the global rise in noncommunicable diseases (NCDs), including cardiovascular diseases, cancer, chronic respiratory diseases,... and diabetes.
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Noncommunicable diseases (NCDs) – chief among them, cardiovascular diseases (heart disease and stroke), cancer, diabetes and chronic respiratory diseases – along with mental health, cause nearly three quarters of deaths in the world. Their drivers are social, environmental, commercial and geneti...c, and their presence is global. Every year 17 million people under the age of 70 die of NCDs, and 86% of them live in low- and middle-income countries (LMICs).
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Noncommunicable diseases (NCDs) – chief among them, cardiovascular diseases (heart disease and stroke), cancer, diabetes and chronic respiratory diseases – along with mental health, cause nearly three quarters of deaths in the world. Their drivers are social, environmental, commercial and geneti...c, and their presence is global. Every year 17 million people under the age of 70 die of NCDs, and 86% of them live in low- and middle-income countries (LMICs).
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The Global Status Report on Noncommunicable Diseases (NCDs) 2014 by the World Health Organization outlines the global impact of NCDs, including cardiovascular diseases, cancer, diabetes, and chronic respiratory diseases, which are responsible for a significant portion of global mortality, particular...ly in low- and middle-income countries.
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The "WHO Package of Essential Noncommunicable (PEN) Disease Interventions for Primary Health Care" provides a set of cost-effective, evidence-based interventions to address noncommunicable diseases (NCDs) such as cardiovascular diseases, diabetes, chronic respiratory diseases, and cancers. Designed ...for implementation in primary healthcare settings, especially in low-resource environments, the package includes protocols for screening, diagnosis, treatment, and management of these diseases. The document emphasizes an integrated approach, supporting universal health coverage by empowering healthcare workers with practical tools to improve NCD care. It aims to reduce premature mortality from NCDs and enhance global health equity.
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The document, "Progress on the Prevention and Control of Non-Communicable Diseases," reports on global efforts to reduce the impact of NCDs, such as heart disease, cancer, diabetes, and chronic respiratory diseases, following the commitments made at high-level United Nations meetings. It highlights ...the inadequate progress in meeting the targets set under the Sustainable Development Goal 3.4 to reduce premature NCD mortality by one-third by 2030. Key challenges include insufficient funding, limited implementation of effective interventions, and political and economic barriers, especially in low-income countries. The report calls for strengthened international cooperation, policy reform, and innovative approaches to meet global health targets.
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Kenya in undergoing an epidemiological transition marked by a decline in morbidity and mortality due to communicable conditions, and an increase in the burden of non-communicable diseases (NCDs), which include diseases such as diabetes, cancers, cardiovascular diseases and chronic respiratory infect...ions. The second strategic objective of KHSSP 2014-2018 targets to halt and reverse the rising burden of non-communicable conditions, while the fifth strategic objective is focused on putting into place health promotion interventions that will address risk factors to health.
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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 control in the WHO African region. It tra...cks 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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