Travel-related health problems in travellers admitted at the University Centre of Maritime and Tropical Medicine in Poland, 2023

Background: Meta-analyses show that 43-79% of international travellers develop a travel-related health problems during or after journey. The aim of the present research was to analyse travel-related morbidity in travellers hospitalized at the University Centre of Maritime and Tropical Medicine in Gdynia, Poland. Material and methods: This retrospective study was based on the analysis of medical records of 159 Polish patients hospitalized at the Department of Tropical and Parasitic Diseases between January and December 2023. Patients' age, sex, continents and countries visited, activities undertaken during travel, and risk behaviours were analysed. The aetiology of illnesses was established for only 79 cases on the basis of reported clinical symptoms and diagnostic tests. Due to limited diagnostics, the aetiological factor could not be determined in 80 patients. Results: Individuals with travel-related health problems accounted for only 14.6% of all patients treated at the Department of Tropical and Parasitic Diseases (159/1087) in the analysed period. Among the patients with travel-related conditions, most travelled to Africa (49.1%) and Asia (28.3%); the mean age of those patients was 41.7 years. Sunbathing (52.2%), scuba diving (17.6%), and safari (17.0%) were the most popular activities among the patients involved in the study; local food consumption (30.8%) was the most frequently reported risk behaviour. The most common causes for hospitalization included gastrointestinal (39.6%) and skin diseases (19.5%), fevers of unknown origin (13.2%), respiratory diseases (12.6%) and vector-borne diseases of established aetiology (10.1%). Due to limited diagnostic possibilities, the aetiological factor could not be determined in 74.6% patients with gastrointestinal diseases, 50% patients with genitourinary and 30% patients with respiratory diseases. Conclusions: Despite having been granted the status of the national reference centre for tropical mepical Medicine do not have the capacity for comprehensive diagnosis and treatment of ill travellers returning from tropical destinations, which is primarily associated with the dispersion of patients presenting with travel-related conditions across different infectious diseases departments in Poland.