Animal feeds are characterized by low water activity values. Nevertheless, fungal contamination with Eurotium species are quite common, causing nutritional depletion, spoilage and economic losses.

The aim of this work was to assess Eurotium amstelodami, E. chevalieri, E. repens and E. rubrum growth in a feed matrix at different conditions of water activity (0.71–0.97) and temperature (5, 15, 25, 30 and 37 °C).

It was found that Eurotium species are able to grow in a wide range of water activity and temperature in a short period of time (7 days) and faster than in synthetic media. Rosso and probabilistic models were applied in order to determine the limiting and optimum growth conditions as well as growth probability at certain combinations of environmental factors. Both models provided an accurate fit to the cardinal parameters and good performance for growth/no growth cases.

This is the first report assessing the growth parameters of Eurotium species directly in animal feed. Data obtained in the present study is useful to predict and avoid Eurotium species growth in animal feed.

动物饲料的特点是水分活度值低。然而，铕物种的真菌污染非常普遍，会导致营养消耗、腐败和经济损失。

这项工作的目的是评估在不同水分活度 (0.71–0.97) 和温度 (5、15、25、30 和 37) 饲料基质中的Eurotium amstelodami、E. chevalieri、E. repens和E. rubrum  ℃）。

发现Eurotium物种能够在短时间内（7 天）在较宽的水分活度和温度范围内生长，并且比在合成培养基中生长速度更快。应用了 Rosso 和概率模型以确定限制和最佳生长条件以及某些环境因素组合下的生长概率。两种模型都提供了对基本参数的准确拟合，并且在生长/无生长情况下具有良好的性能。

这是第一份直接在动物饲料中评估Eurotium物种生长参数的报告。本研究中获得的数据可用于预测和避免动物饲料中的铕物种生长。