Rodent Surveillance at Kaohsiung International Port, 2018–2022

DOI: 10.6524/EB.202508_41(16).0001

Chia-Chien Li^*, Feng-Hui Chang, Min-Nan Hung, Yan-Chang Duan, Hui-Chen Lin

2025 Vol.41 NO.16

Correspondence Author： Chia-Chien Li^*

Abstract：

        In this study, we analyzed rodent surveillance data from Kaohsiung International Port between 2018 and 2022. During this period, 108 rodents were captured, predominantly Rattus norvegicus and Suncus murinus. Serological testing revealed average positive rates of 8.3% for hantavirus antibodies and 27.8% for endemic typhus antibodies, with no positive results for Yersinia pestis antibodies. Rattus norvegicus showed the highest antibody-positive rates. The seasonal distribution of captured rodents showed little variation, but hantavirus and endemic typhus antibodies were consistently detected. The rat-flea index analysis underscored the need for continued rodent and flea eradication efforts. Poison bait consumption rates were higher from June to November (25.4%–35.6%), peaking in September. 
        We recommended enhancing prevention and control measures in high-risk areas (e.g., Container Area 3 and Zhongdao Area) during high-risk months. Continued routine rodent surveillance, improved rodent control knowledge among port personnel, effective information feedback, cross-departmental communication, and environmental improvements were advised to reduce rodent and flea populations to protect port workers' health.