An outbreak of severe Kawasaki-like disease at the Italian epicentre of the SARS-CoV-2 epidemic: an observational cohort study. Verdoni, L., Mazza, A., Gervasoni, A., Martelli, L., Ruggeri, M., Ciuffreda, M., Bonanomi, E., & D'Antiga, L. The Lancet, 395(10239):1771–1778, June, 2020. Publisher: Elsevier
An outbreak of severe Kawasaki-like disease at the Italian epicentre of the SARS-CoV-2 epidemic: an observational cohort study [link]Paper  doi  abstract   bibtex   
\textlessh2\textgreaterSummary\textless/h2\textgreater\textlessh3\textgreaterBackground\textless/h3\textgreater\textlessp\textgreaterThe Bergamo province, which is extensively affected by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) epidemic, is a natural observatory of virus manifestations in the general population. In the past month we recorded an outbreak of Kawasaki disease; we aimed to evaluate incidence and features of patients with Kawasaki-like disease diagnosed during the SARS-CoV-2 epidemic.\textless/p\textgreater\textlessh3\textgreaterMethods\textless/h3\textgreater\textlessp\textgreaterAll patients diagnosed with a Kawasaki-like disease at our centre in the past 5 years were divided according to symptomatic presentation before (group 1) or after (group 2) the beginning of the SARS-CoV-2 epidemic. Kawasaki- like presentations were managed as Kawasaki disease according to the American Heart Association indications. Kawasaki disease shock syndrome (KDSS) was defined by presence of circulatory dysfunction, and macrophage activation syndrome (MAS) by the Paediatric Rheumatology International Trials Organisation criteria. Current or previous infection was sought by reverse-transcriptase quantitative PCR in nasopharyngeal and oropharyngeal swabs, and by serological qualitative test detecting SARS-CoV-2 IgM and IgG, respectively.\textless/p\textgreater\textlessh3\textgreaterFindings\textless/h3\textgreater\textlessp\textgreaterGroup 1 comprised 19 patients (seven boys, 12 girls; aged 3·0 years [SD 2·5]) diagnosed between Jan 1, 2015, and Feb 17, 2020. Group 2 included ten patients (seven boys, three girls; aged 7·5 years [SD 3·5]) diagnosed between Feb 18 and April 20, 2020; eight of ten were positive for IgG or IgM, or both. The two groups differed in disease incidence (group 1 vs group 2, 0·3 vs ten per month), mean age (3·0 vs 7·5 years), cardiac involvement (two of 19 vs six of ten), KDSS (zero of 19 vs five of ten), MAS (zero of 19 vs five of ten), and need for adjunctive steroid treatment (three of 19 vs eight of ten; all p\textless0·01).\textless/p\textgreater\textlessh3\textgreaterInterpretation\textless/h3\textgreater\textlessp\textgreaterIn the past month we found a 30-fold increased incidence of Kawasaki-like disease. Children diagnosed after the SARS-CoV-2 epidemic began showed evidence of immune response to the virus, were older, had a higher rate of cardiac involvement, and features of MAS. The SARS-CoV-2 epidemic was associated with high incidence of a severe form of Kawasaki disease. A similar outbreak of Kawasaki-like disease is expected in countries involved in the SARS-CoV-2 epidemic.\textless/p\textgreater\textlessh3\textgreaterFunding\textless/h3\textgreater\textlessp\textgreaterNone.\textless/p\textgreater
@article{verdoni_outbreak_2020,
	title = {An outbreak of severe {Kawasaki}-like disease at the {Italian} epicentre of the {SARS}-{CoV}-2 epidemic: an observational cohort study},
	volume = {395},
	issn = {0140-6736, 1474-547X},
	shorttitle = {An outbreak of severe {Kawasaki}-like disease at the {Italian} epicentre of the {SARS}-{CoV}-2 epidemic},
	url = {https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)31103-X/abstract},
	doi = {10.1016/S0140-6736(20)31103-X},
	abstract = {{\textless}h2{\textgreater}Summary{\textless}/h2{\textgreater}{\textless}h3{\textgreater}Background{\textless}/h3{\textgreater}{\textless}p{\textgreater}The Bergamo province, which is extensively affected by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) epidemic, is a natural observatory of virus manifestations in the general population. In the past month we recorded an outbreak of Kawasaki disease; we aimed to evaluate incidence and features of patients with Kawasaki-like disease diagnosed during the SARS-CoV-2 epidemic.{\textless}/p{\textgreater}{\textless}h3{\textgreater}Methods{\textless}/h3{\textgreater}{\textless}p{\textgreater}All patients diagnosed with a Kawasaki-like disease at our centre in the past 5 years were divided according to symptomatic presentation before (group 1) or after (group 2) the beginning of the SARS-CoV-2 epidemic. Kawasaki- like presentations were managed as Kawasaki disease according to the American Heart Association indications. Kawasaki disease shock syndrome (KDSS) was defined by presence of circulatory dysfunction, and macrophage activation syndrome (MAS) by the Paediatric Rheumatology International Trials Organisation criteria. Current or previous infection was sought by reverse-transcriptase quantitative PCR in nasopharyngeal and oropharyngeal swabs, and by serological qualitative test detecting SARS-CoV-2 IgM and IgG, respectively.{\textless}/p{\textgreater}{\textless}h3{\textgreater}Findings{\textless}/h3{\textgreater}{\textless}p{\textgreater}Group 1 comprised 19 patients (seven boys, 12 girls; aged 3·0 years [SD 2·5]) diagnosed between Jan 1, 2015, and Feb 17, 2020. Group 2 included ten patients (seven boys, three girls; aged 7·5 years [SD 3·5]) diagnosed between Feb 18 and April 20, 2020; eight of ten were positive for IgG or IgM, or both. The two groups differed in disease incidence (group 1 \textit{vs} group 2, 0·3 \textit{vs} ten per month), mean age (3·0 \textit{vs} 7·5 years), cardiac involvement (two of 19 \textit{vs} six of ten), KDSS (zero of 19 \textit{vs} five of ten), MAS (zero of 19 \textit{vs} five of ten), and need for adjunctive steroid treatment (three of 19 \textit{vs} eight of ten; all p{\textless}0·01).{\textless}/p{\textgreater}{\textless}h3{\textgreater}Interpretation{\textless}/h3{\textgreater}{\textless}p{\textgreater}In the past month we found a 30-fold increased incidence of Kawasaki-like disease. Children diagnosed after the SARS-CoV-2 epidemic began showed evidence of immune response to the virus, were older, had a higher rate of cardiac involvement, and features of MAS. The SARS-CoV-2 epidemic was associated with high incidence of a severe form of Kawasaki disease. A similar outbreak of Kawasaki-like disease is expected in countries involved in the SARS-CoV-2 epidemic.{\textless}/p{\textgreater}{\textless}h3{\textgreater}Funding{\textless}/h3{\textgreater}{\textless}p{\textgreater}None.{\textless}/p{\textgreater}},
	language = {English},
	number = {10239},
	urldate = {2020-06-21},
	journal = {The Lancet},
	author = {Verdoni, Lucio and Mazza, Angelo and Gervasoni, Annalisa and Martelli, Laura and Ruggeri, Maurizio and Ciuffreda, Matteo and Bonanomi, Ezio and D'Antiga, Lorenzo},
	month = jun,
	year = {2020},
	pmid = {32410760},
	note = {Publisher: Elsevier},
	keywords = {Children, Kawasaki, RT-PCR},
	pages = {1771--1778},
}
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