By 2030, an estimated two billion international tourist trips are expected annually worldwide, with Poland as an important contributor. Illness rates among returnees from developing regions hover between 43-79%. Properly diagnosing fever in these travelers is vital due to potential severe implications. After visiting tropical and subtropical zones, the main health complaints are diarrhea, fever, and skin changes. A reliable diagnosis begins with a comprehensive travel history and identifying risks. In travelers from sub-Saharan Africa, malaria caused by Plasmodium falciparum is the main cause of the fever, affecting 50 in every 1000. For Southeast Asia returnees, dengue is dominant, impacting 50-60 per 1000 and its prevalence rises significantly nowadays. Other significant diseases include chikungunya, zika, typhoid, amoebic liver abscess, and occasionally viral hemorrhagic fevers. SARS- CoV-2 and influenza virus are crucial pathogens as well. An in-depth travel assessment, combined with tropical disease knowledge, sharpens diagnoses, with algorithms aiding in selecting the appropriate tests and methods.

中文翻译：

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前往热带地区旅行后发烧患者的实用方法。

到 2030 年，预计全球每年国际旅游人次将达到 20 亿人次，其中波兰将成为重要贡献者。发展中地区回国人员的患病率徘徊在43%至79%之间。由于潜在的严重影响，正确诊断这些旅行者的发烧至关重要。访问热带和亚热带地区后，主要的健康问题是腹泻、发烧和皮肤变化。可靠的诊断始于全面的旅行史和识别风险。在来自撒哈拉以南非洲的旅行者中，由恶性疟原虫引起的疟疾是发烧的主要原因，每1000人中就有50人受到影响。对于东南亚回返者来说，登革热是主要疾病，每1000人中就有50-60人受到登革热的影响，而且目前其患病率显着上升。其他重要疾病包括基孔肯雅热、寨卡病毒、伤寒、阿米巴肝脓肿，偶尔还有病毒性出血热。SARS-CoV-2 和流感病毒也是重要的病原体。深入的旅行评估与热带疾病知识相结合，可以提高诊断效率，并通过算法帮助选择适当的测试和方法。