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Avian influenza A(H7N9) virus infections, Shanghai, China.

Mei Z, Lu S, Wu X, Shao L, Hui Y, Wang J, Li T, Zhang H, Wang X, Yang F, Jin J, Zhang Y, Zhang W - Emerging Infect. Dis. (2013)

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On March 31, 2013, the National Health and Family Planning Commission of China notified the World Health Organization of 3 cases of human infections with avian influenza A(H7N9) virus... Duration from disease onset to severe illness was 5–7 days... At admission, the 4 patients with severe cases had decreased peripheral blood leukocyte counts and increased levels of aspartate aminotransferase; 3 had increased levels of lactate dehydrogenase (Table)... All 4 adult patients had radiologically confirmed pneumonia and bilateral patchy alveolar opacities or diffused lobar consolidation with or without pleural effusion (Figure, Appendix)... One contact (husband of patient 1) of a patient who died (Table) became febrile and was positive for avian influenza A(H7N9) virus on April 12 (day 24 after disease onset for patient 1); as of the date of this report, he was receiving treatment in an intensive care unit... Avian influenza A(H7N9) virus infection seems to cause more severe human illness than do other subgroups of H7 influenza A viruses (subtypes H7N2, H7N3, and H7N7), which are usually associated with poultry outbreaks but cause mild disease in humans... In the 5 patients reported here, avian influenza A(H7N9) virus caused fatal disease in 2 adult patients 52 and 49 years of age, who had other medical conditions... Older age has been reported to confer higher risk for developing more severe influenza-associated outcomes... In conclusion, these cases indicated that avian influenza A(H7N9) virus might not be as virulent as avian influenza A(H5N1) virus in humans... Avian influenza A(H7N9) virus does not appear to cause obvious disease in poultry and causes mild disease in children... More severe disease in adults occurred among those had concurrent diseases or were immunodeficient.

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Chest computed tomographic scans for 3 patients infected with avian influenza A(H7N9) virus, Shanghai, China. A) Patient 1, who died, showing extensive lung infiltrates at day 7 of illness onset. B) Patient 3, who had a severe case, showing partial rear lung infiltrations on both sides of the lung and partial normal lung at day 7 of illness onset. C) Patient 4, who had a mild case, showing only partial left lung lobar involvement at day 9 of illness onset.
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Figure 1: Chest computed tomographic scans for 3 patients infected with avian influenza A(H7N9) virus, Shanghai, China. A) Patient 1, who died, showing extensive lung infiltrates at day 7 of illness onset. B) Patient 3, who had a severe case, showing partial rear lung infiltrations on both sides of the lung and partial normal lung at day 7 of illness onset. C) Patient 4, who had a mild case, showing only partial left lung lobar involvement at day 9 of illness onset.

Mentions: All 4 adult patients had radiologically confirmed pneumonia and bilateral patchy alveolar opacities or diffused lobar consolidation with or without pleural effusion (Figure, Appendix). Findings on chest radiographs for severe cases requiring mechanical ventilation were consistent with those for acute respiratory distress syndrome.


Avian influenza A(H7N9) virus infections, Shanghai, China.

Mei Z, Lu S, Wu X, Shao L, Hui Y, Wang J, Li T, Zhang H, Wang X, Yang F, Jin J, Zhang Y, Zhang W - Emerging Infect. Dis. (2013)

Chest computed tomographic scans for 3 patients infected with avian influenza A(H7N9) virus, Shanghai, China. A) Patient 1, who died, showing extensive lung infiltrates at day 7 of illness onset. B) Patient 3, who had a severe case, showing partial rear lung infiltrations on both sides of the lung and partial normal lung at day 7 of illness onset. C) Patient 4, who had a mild case, showing only partial left lung lobar involvement at day 9 of illness onset.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3713995&req=5

Figure 1: Chest computed tomographic scans for 3 patients infected with avian influenza A(H7N9) virus, Shanghai, China. A) Patient 1, who died, showing extensive lung infiltrates at day 7 of illness onset. B) Patient 3, who had a severe case, showing partial rear lung infiltrations on both sides of the lung and partial normal lung at day 7 of illness onset. C) Patient 4, who had a mild case, showing only partial left lung lobar involvement at day 9 of illness onset.
Mentions: All 4 adult patients had radiologically confirmed pneumonia and bilateral patchy alveolar opacities or diffused lobar consolidation with or without pleural effusion (Figure, Appendix). Findings on chest radiographs for severe cases requiring mechanical ventilation were consistent with those for acute respiratory distress syndrome.

View Article: PubMed Central - PubMed

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

On March 31, 2013, the National Health and Family Planning Commission of China notified the World Health Organization of 3 cases of human infections with avian influenza A(H7N9) virus... Duration from disease onset to severe illness was 5–7 days... At admission, the 4 patients with severe cases had decreased peripheral blood leukocyte counts and increased levels of aspartate aminotransferase; 3 had increased levels of lactate dehydrogenase (Table)... All 4 adult patients had radiologically confirmed pneumonia and bilateral patchy alveolar opacities or diffused lobar consolidation with or without pleural effusion (Figure, Appendix)... One contact (husband of patient 1) of a patient who died (Table) became febrile and was positive for avian influenza A(H7N9) virus on April 12 (day 24 after disease onset for patient 1); as of the date of this report, he was receiving treatment in an intensive care unit... Avian influenza A(H7N9) virus infection seems to cause more severe human illness than do other subgroups of H7 influenza A viruses (subtypes H7N2, H7N3, and H7N7), which are usually associated with poultry outbreaks but cause mild disease in humans... In the 5 patients reported here, avian influenza A(H7N9) virus caused fatal disease in 2 adult patients 52 and 49 years of age, who had other medical conditions... Older age has been reported to confer higher risk for developing more severe influenza-associated outcomes... In conclusion, these cases indicated that avian influenza A(H7N9) virus might not be as virulent as avian influenza A(H5N1) virus in humans... Avian influenza A(H7N9) virus does not appear to cause obvious disease in poultry and causes mild disease in children... More severe disease in adults occurred among those had concurrent diseases or were immunodeficient.

Show MeSH
Related in: MedlinePlus