4.5 Article

A prospective observational study of community acquired pneumonia in Kenya: the role of viral pathogens

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BMC INFECTIOUS DISEASES
卷 21, 期 1, 页码 -

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BMC
DOI: 10.1186/s12879-021-06388-x

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Pneumonia; Viral pneumonia; Community acquired pneumonia; Sub-Saharan Africa; Kenya; Influenza; Tuberculosis; Pneumocystis jirovecii; Diabetes; HIV

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Lower respiratory tract infections are a major cause of morbidity and mortality globally. A study in Kenya found that viruses, especially Influenza A, were commonly identified as etiologic agents in patients with community acquired pneumonia. The study also highlighted the presence of underlying conditions such as cardiovascular disease and diabetes, pointing to the increasing burden of infectious and noncommunicable diseases in the region.
Background Lower respiratory tract infections continue to contribute significantly to morbidity and mortality across all age groups globally. In sub-Saharan Africa, many studies of community acquired pneumonia in adults have focused on HIV-infected patients and little attention has been given to risk factors and etiologic agents in an urban area with a more moderate HIV prevalence. Methods We prospectively enrolled 77 patients admitted to a 280 bed teaching hospital in Kenya with radiographically confirmed community acquired pneumonia from May 2019 to March 2020. The patients were followed for etiology and clinical outcomes. Viral PCR testing was performed using the FTD respiratory pathogen-21 multiplex kit on nasopharyngeal or lower respiratory samples. Additional microbiologic workup was performed as determined by the treating physicians. Results A potential etiologic agent(s) was identified in 57% including 43% viral, 5% combined viral and bacterial, 5% bacterial and 4% Pneumocystis. The most common etiologic agent was Influenza A which was associated with severe clinical disease. The most common underlying conditions were cardiovascular disease, diabetes and lung disease, while HIV infection was identified in only 13% of patients. Critical care admission was required for 24, and 31% had acute kidney injury, sometimes in combination with acute respiratory distress or sepsis. Conclusion Viruses, especially influenza, were commonly found in patients with CAP. In contrast to other studies from sub-Saharan Africa, the underlying conditions were similar to those reported in high resource areas and point to the growing concern of the double burden of infectious and noncommunicable diseases.

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