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目的通过鼠类对不同饵料消耗率的比较,对口岸范围鼠类侵害程度进行研究。方法以盐城“陆、海、空”口岸范围内各类型单位室内外鼠类活动作为研究对象,根据食饵消耗率,分析阳性频度分布趋势,确立鼠类侵害程度指标值。结果根据鼠征阳性率范围均值、离散度及频度分布理论,考虑卫生检疫实践,提出盐城口岸范围内鼠征法侵害程度分级标准:Ⅰ级(不足为害)侵害率0～2%;Ⅱ级(轻度侵害)侵害率>2%～10%;Ⅲ级(中度侵害)侵害率>10%～30%;Ⅳ级(重度侵害)侵害率>30%。结论提出用饵料消耗率区分口岸范围鼠类侵害程度分级标准,可与鼠征法同时或单独使用,适合口岸大范围监测要求。
OBJECTIVE To study the extent of rat aggression in the area of port by comparing the consumption rates of different kinds of food. Methods The indoor and outdoor mouse activities of various types of units in Yancheng “land, sea and air ” ports were studied. According to the consumption rate of prey, the frequency distribution of positive frequency was analyzed to establish the target value of mouse infestation. Results According to the mean value, dispersion and frequency distribution theory of positive rate of rat sign, considering the practice of health and quarantine, the grading standard of rat sign law in Yancheng Port was put forward: grade Ⅰ (less harmful) infested rate 0-2%; grade Ⅱ (Moderate invasion) rate> 2% ~ 10%; grade Ⅲ (moderate invasion) rate> 10% ~ 30%; rate Ⅳ (severe invasion) rate> 30%. Conclusions The classification criteria for the extent of rodent infestation in the port area are proposed by using the rate of consumption of foodstuffs. It can be used simultaneously or separately with the mouse sign method, which is suitable for the large-scale monitoring requirements of the port.