Since the seal populations in the North Sea are again thriving, the rationale behind seal rehabilitation is currently under discussion. Seals frequently require rehabilitation as a result of a lungworm infection, with these infections most commonly seen in young seals. The need for triage support is addressed by the organisations involved in seal rehabilitation to ensure adequate decision making on whether or not a seal should be taken into rehabilitation. It is still unclear which parameters influence seal mortality in rehabilitation, these parameters are essential to enable triaging of stranded seals.

Therefore, the aims of this study were: to estimate the proportion of lungworm infected juvenile harbour seals in a rehabilitation centre; to determine the survival rate among lungworm infected juvenile harbour seals; and to study determinants of mortality in the lungworm infected juvenile harbour seals. Data was collected retrospectively from all harbour seals admitted to a Dutch rehabilitation centre between September 2017 and August 2019 (n = 208). Eleven parameters were evaluated using univariable logistic regression with a 95% confidence interval (p < 0.05) to study the association between the determinants and the outcome – survival or death. All associated parameters with a p-value <0.2 were used in multivariable logistic regression.

The multivariable model demonstrated that high body temperature at intake (high vs normal body temperature OR = 0.32; p = 0.01); intake from August to December (Augustus-December vs January–May OR = 0.40; p = 0.02); and whether the seal was previously admitted to a rehabilitation centre (yes vs no OR = 0.12, p < 0.01) were good determinants of mortality. The results of this study could be used to further develop triage-support that aids in the decision to leave the seal on the beach; admitting the seal to a rehabilitation centre; and/or to euthanise the seal, in order to prevent further suffering.

由于北海海豹种群数量再次兴旺，因此目前正在讨论海豹修复工作的基本原理。海豹经常由于肺部感染而需要康复，这些感染最常见于幼小海豹。参与海豹修复工作的组织解决了分流支持的需求，以确保就是否应将海豹修复工作进行适当的决策。尚不清楚哪些参数会影响修复过程中的海豹死亡率，这些参数对于分流海豹的分类至关重要。

因此，本研究的目的是：估计康复中心中感染了蠕虫的幼年海豹的比例；确定被肺虫感染的幼年海豹的存活率；并研究感染了蠕虫的幼年海豹的死亡率的决定因素。回顾性收集2017年9月至2019年8月之间进入荷兰康复中心的所有海豹的数据（n = 208）。使用具有95％置信区间（p <0.05）的单变量logistic回归评估了11个参数，以研究决定因素与结果之间的关联-生存或死亡。p值<0.2的所有相关参数都用于多变量logistic回归。

多变量模型表明摄入时体温较高（高vs正常体温OR = 0.32； p = 0.01）；8月至12月的摄入量（奥古斯都-12月与1月-5月OR = 0.40； p = 0.02）；是否封条先前曾入过康复中心（是vs否OR = 0.12，p <0.01）是死亡率的良好决定因素。这项研究的结果可用于进一步发展分流支持，有助于决定将海豹遗留在海滩上。使印章进入康复中心；和/或对密封件实施安乐死，以防止进一步遭受痛苦。