International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases · 2026
Prevalence of enterovirus genus respiratory infections and co-infections: A cross-sectional study in a Northeast Italian Hospital (2023-2025).
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Pomari Elena, Marchetti Pierpaolo, Feletti Rebecca, Formenti Fabio, Perandin Francesca, Verlato Giuseppe, Gobbi Federico Giovanni, Castilletti Concetta
Аннотация
OBJECTIVES: Enteroviruses (EV) are major causes of acute respiratory infections (ARIs), but their epidemiology and co-infection patterns in hospitals are not fully understood. We assessed EV prevalence, co-infections and seasonal distribution in patients attending a hospital in northeast Italy over three years.
METHODS: We performed a retrospective cross-sectional study from January 2023 to December 2025. Patients with influenza-like illness or ARIs were tested using a multiplex respiratory panel. Demographic, temporal and laboratory data were analysed to evaluate associations between EV detection, age, gender, season and infection type (single vs co-infection).
RESULTS: Among 3444 respiratory samples from 3154 patients, 2168 (62.9%) were positive for at least one pathogen. EV was the most frequently detected pathogen (47.6%). Most infections occurred in children ≤17 years (84.6%), especially those aged 0-4 years. Co-infections were identified in 45.7% of EV-positive cases, mainly with adenoviruses (38.0%) and Mycoplasma pneumoniae (8.1%). EV circulated year-round, with single infections peaking in autumn and co-infections in spring. Single infections were associated with older pediatric age groups and autumn, while co-infections were linked to younger children and spring.
CONCLUSIONS: EV are leading respiratory pathogens in this setting, particularly in young children, supporting multiplex diagnostics and continuous surveillance.
METHODS: We performed a retrospective cross-sectional study from January 2023 to December 2025. Patients with influenza-like illness or ARIs were tested using a multiplex respiratory panel. Demographic, temporal and laboratory data were analysed to evaluate associations between EV detection, age, gender, season and infection type (single vs co-infection).
RESULTS: Among 3444 respiratory samples from 3154 patients, 2168 (62.9%) were positive for at least one pathogen. EV was the most frequently detected pathogen (47.6%). Most infections occurred in children ≤17 years (84.6%), especially those aged 0-4 years. Co-infections were identified in 45.7% of EV-positive cases, mainly with adenoviruses (38.0%) and Mycoplasma pneumoniae (8.1%). EV circulated year-round, with single infections peaking in autumn and co-infections in spring. Single infections were associated with older pediatric age groups and autumn, while co-infections were linked to younger children and spring.
CONCLUSIONS: EV are leading respiratory pathogens in this setting, particularly in young children, supporting multiplex diagnostics and continuous surveillance.