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褐家鼠具有家野共栖的生态特点。褐家鼠鼠疫主要来自于野外黄鼠,由于褐家鼠多栖居屯内,与人的关系极为密切,所以人间鼠疫的直接传染来源多是褐家鼠及其寄生蚤。黄鼠在保持鼠疫菌种的延续上起决定性作用.
Rattus norvegicus has the ecological characteristics of home wild habitat. Rattus norvegicus is mainly from the wild Chrysolophus, Rattus norvegicus due to more dwelling Tuen Mun, very close relationship with people, so the direct source of human plague infection are mostly Rattus norvegicus and its parasitic fleas. Chrysomoon play a decisive role in maintaining the continuation of plague strains.