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Sustained increase of paediatric invasive Streptococcus pyogenes infections dominated by M1UK and diverse emm12 isolates, Portugal, September 2022 to May 2023
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View Affiliations Hide AffiliationsAna Friãesafriaes fm.ul.pt
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Portuguese Group for the Study of Streptococcal Infections: Margarida Pinto, Miguel Seruca, João Marques, Isabel Peres, Teresa Pina, Isabel Lourenço, Teresa Ferreira, Cristina Marcelo, Isabel Daniel, Odete Chantre, Teresa Vaz, Marília Gião, Rui Ferreira, Rui Tomé Ribeiro, Celeste Pontes, Luísa Boaventura, Catarina Chaves, Teresa Reis, Henrique Oliveira, Catarina Chaves, Mariana Silva, Ana Aguiar, Hugo Loureiro, Adriana Pedrosa, Hermínia Costa, Maria Fátima Silva, Maria Amélia Afonso, Mariana Fardilha, Natália Novais, Isabel Brito, Luís Marques Lito, Ana Bruschy Fonseca, Filomena Martins, Maria Ana Pessanha, Elsa Gonçalves, Teresa Morais, Cristina Toscano, Paulo Lopes, Angelina Lameirão, Gabriela Abreu, Aurélia Selaru, Ana Paula Mota Vieira, Margarida Tomaz, Cláudia Ferreira, Marta Nicolau, Maria Helena Ramos, Ana Paula Castro, Virgínia Lopes, Fernando Fonseca, Ana Paula Castro, Nuno Canhoto, Teresa Afonso, Ilse Fontes, Paulo Martinho, Gina Marrão, Ana Domingos, José Grossinho, Manuela Ribeiro, Helena Gonçalves, Alberta Faustino, Maria Cármen Iglesias, Maria Paula Pinheiro, Rui Semedo, Adriana Coutinho, Luísa Gonçalves, Olga Neto, Luísa Sancho, José Diogo, Filipa Fortunato, Isabel Nascimento, Nadiya Kruptsala, Cláudia Fidalgo, Elmano Ramalheira, Raquel Diaz, Sónia Ferreia, Inês Cravo Roxo, Isabel Vale, Maria João Tomás, Maria Antónia Read, Valquíria Alves, Margarida Monteiro, Margarida Rodrigues, José Mota Freitas, Sandra Vieira, Elsa Calado, Paula Pinto, Ana Custódio, Maria Favila Menezes, José Germano de Sousa, Mariana Bettencourt Viana, Marvin Oliveira, Isaura Terra, Vitória Rodrigues, Sofia Marques, Joana Selada, Patrícia Pereira, Jesuína Duarte, Paula Pinto, Ezequiel Moreira, Adília Vicente, Fátima Vale, Joana Ramos, Rita Gralha, Ana Helena Correia, Paula Gama, Catarina Silva-Costa, Joana Gomes-Silva, Marcos Pinho, Célia Rodrigues Bettencourt, Miguel Pinto;Portuguese Study Group of Paediatric Invasive Streptococcal Disease: Sónia Aires, Eurico Gaspar, Manuela Ferreira, Fernanda Pereira, Graça Pombo, Maria José Dinis, Paulo Teixeira, José Amorim, Cláudia Monteiro, Diana Moreira, Sofia Arosa, Laura Marques, Margarida Tavares, Maria Manuel Zarcos, Sílvia Almeida, Fernanda Rodrigues, Jorge Rodrigues, Pedro Carvalho, Catarina Gouveia, Ana Isabel Carvalho, Alexandra Costa, Elsa Gonçalves, Filipa Prata, João Calado Nunes, Julieta Morais, Florbela Cunha, Paula Correia, Ana Margarida Chaves, Sofia Lima, João Neves, João Bivar, Pedro Flores, Sofia Fraga, Isabel Brito, Cristina Didelet, Estela Veiga, Carla Cruz, Graça Seves, Céu Novais, Maria João Virtuoso, Nancy Guerreiro, Francisco Gomes, Dora Gomes, Carolina Gonçalves, Nuno CanhotoView Citation Hide Citation
Citation style for this article: . Sustained increase of paediatric invasive Streptococcus pyogenes infections dominated by M1UK and diverse emm12 isolates, Portugal, September 2022 to May 2023. Euro Surveill. 2023;28(36):pii=2300427. https://doi.org/10.2807/1560-7917.ES.2023.28.36.2300427 Received: 14 Aug 2023; Accepted: 07 Sept 2023
Abstract
Since autumn 2022, observed numbers of paediatric invasive group A Streptococcus infections in Portugal (n = 89) were higher than in pre-COVID-19 seasons. Between September 2022 and May 2023, the dominant diagnoses were pneumonia (25/79), mostly with empyema (20/25), and sepsis (22/79). A number of cases required admission to intensive care (27/79) and surgery (35/79), and the case fatality rate was 5.1% (4/79). Genomic sequencing (n = 55) revealed multiple genetic lineages, dominated by the M1UK sublineage (26/55) and more diverse emm12 isolates (12/55).
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