Global burden of childhood pneumonia and diarrhoea

Christa L Fischer Walker, Igor Rudan, Li Liu, Harish Nair, Evropi Theodoratou, Zulfiqar A Bhutta, Katherine L O'Brien, Harry Campbell, Robert E Black, Christa L Fischer Walker, Igor Rudan, Li Liu, Harish Nair, Evropi Theodoratou, Zulfiqar A Bhutta, Katherine L O'Brien, Harry Campbell, Robert E Black

Abstract

Diarrhoea and pneumonia are the leading infectious causes of childhood morbidity and mortality. We comprehensively reviewed the epidemiology of childhood diarrhoea and pneumonia in 2010-11 to inform the planning of integrated control programmes for both illnesses. We estimated that, in 2010, there were 1·731 billion episodes of diarrhoea (36 million of which progressed to severe episodes) and 120 million episodes of pneumonia (14 million of which progressed to severe episodes) in children younger than 5 years. We estimated that, in 2011, 700,000 episodes of diarrhoea and 1·3 million of pneumonia led to death. A high proportion of deaths occurs in the first 2 years of life in both diseases--72% for diarrhoea and 81% for pneumonia. The epidemiology of childhood diarrhoea and that of pneumonia overlap, which might be partly because of shared risk factors, such as undernutrition, suboptimum breastfeeding, and zinc deficiency. Rotavirus is the most common cause of vaccine-preventable severe diarrhoea (associated with 28% of cases), and Streptococcus pneumoniae (18·3%) of vaccine-preventable severe pneumonia. Morbidity and mortality from childhood pneumonia and diarrhoea are falling, but action is needed globally and at country level to accelerate the reduction.

Copyright © 2013 Elsevier Ltd. All rights reserved.

Figures

Figure 1
Figure 1
Distribution of cases of, and deaths from, diarrhoea and pneumonia in children aged 0–4 years
Figure 2
Figure 2
Annual rates of change in diarrhoea-specific and pneumonia-specific mortality between 2000 and 2010 74 Countdown to 2015 countries are shown; the 15 countries with the highest burdens are labelled. Dotted lines show target annual rates of change to achieve the fourth Millennium Development Goal. DRC=Democratic Republic of the Congo.

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