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Marked increase in cryptosporidiosis cases, Spain, 2023
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View Affiliations Hide AffiliationsBernardo R Guzmán Herradorbguzman sanidad.gob.es
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Collaborators: Nicola Lorusso, Isabel M Vázquez Rincón, Alejandra Pérez Pérez, Cristina Navarro Gistau, An L D Boone, Sara Iglesias Martinez, Teresa González Cortijo, Marta Ramirez Cases, Laura García Hernández, Marta Pacheco Gorostiaga, Luis Javier Viloria Raymundo, Mª del Henar Marcos Rodríguez, Virginia Álvarez Río, Conchita Izquierdo Gómez, Aurora Sabrià Sunyé, Ninoska López Berrios, Violeta Ramos Marín, Enrique Mansilla Ferrer, Cristina Vicedo García, Ignacio Pérez Sánchez, Noa Batalla Rebollo, Andrés Aragón Peña, Manuel José Velasco Rodriguez, Daniel Castrillejo Pérez, Maria Dolores Chirlaque López, Alonso Sánchez-Migallón Naranjo, Jesús Castilla, Itziar Casado, Fernando González Carril, Adrían Hugo Aguinagalde, Ana Carmen Ibáñez PérezView Citation Hide Citation
Citation style for this article: . Marked increase in cryptosporidiosis cases, Spain, 2023. Euro Surveill. 2024;29(28):pii=2300733. https://doi.org/10.2807/1560-7917.ES.2024.29.28.2300733 Received: 20 Dec 2023; Accepted: 26 Apr 2024
Abstract
By mid-September 2023, several event notifications related to cryptosporidiosis had been identified from different regions in Spain. Therefore, a request for urgent notification of cryptosporidiosis cases to the National Surveillance Network was launched.
We aimed at assessing the extent of the increase in cases, the epidemiological characteristics and the transmission modes and compared to previous years.
We analysed data on case notifications, outbreak reports and genotypes focusing on June–October 2023 and compared the results to 2016–2022.
In 2023, 4,061 cryptosporidiosis cases were notified in Spain, which is an increase compared to 2016–2022. The cumulative incidence was 8.3 cases per 100,000 inhabitants in 2023, sixfold higher than the median of 1.4 cases per 100,000 inhabitants 2016–2022. Almost 80% of the cases were notified between June and October. The largest outbreaks were related to contaminated drinking water or swimming pools. Cryptosporidium hominis was the most common species in the characterised samples (115/122), and the C. hominis IfA12G1R5 subtype, previously unusual in Spain, was detected from 76 (62.3%) of the 122 characterised samples.
A substantial increase in cryptosporidiosis cases was observed in 2023. Strengthening surveillance of Cryptosporidium is essential for prevention of cases, to better understand trends and subtypes circulating and the impact of adverse meteorological events.
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