【摘要】 对饲养水中泼洒不同浓度（０．２ｍｇ／Ｌ、０．５ｍｇ／Ｌ和１．０ｍｇ／Ｌ）的呋喃唑酮后，研究了饲养水及草鱼体表粘液中好氧与兼性厌氧细菌的数量及组成变化。结果表明：用药前，饲养水及粘液中的菌群主要有Ａｅｒｏｍｏｎａｓ、Ｅｎｔｅｒｏｂａｃｔｅｒｉａｃｅａｅ、Ｖｉｂｒｉｏ、Ｆｌａｖｏｂａｃｔｅｒｉｕｍ、Ａｃｉｎｅｔｏｂａｃｔｅｒ、Ｐｓｅｕｄｏｍｏｎａｓ、Ｃｏｒｙｎｅｂａｃｔｅｒｉｕｍ、Ｓｔａｐｈｙｌｏｃｏｃｕｓ和Ｂａｃｉｌｕｓ，此外，水体中还检测到Ｍｉｃｒｏｃｏｃｕｓ和Ａｌｃａｌｉｇｅｎｅｓ。水体及粘液中的细菌数量在用药后１２ｈ或２４ｈ时降至最低，在４８ｈ或９６ｈ时恢复到原来的水平。用药后，水体及粘液中的优势菌群未发生改变，但Ｆｌａｖｏｂａｃｔｅｒｉｕｍ的比例显著增加，Ａｅｒｏｍｏｎａｓ、Ｖｉｂｒｉｏ和Ｅｎｔｅｒｏｂａｃｔｅｒｉａｃｅａｅ明显减少，Ｐｓｅｕｄｏｍｏｎａｓ和Ａｃｉｎｅｔｏｂａｃｔｅｒ则未能检测到，其他各类群的比例也有一定的变化。菌群的变化速度与用药浓度有关。更多还原

【Abstract】 In culture pond water, furazolidone was dispersed at different concentrations (0.2mg/L, 0.5mg/L and 1.0mg/L) respectively. The variations of aerobic and facultive anaerobic bacterial flora in water and the body surface mucus of grass carp were detected at 0h, 6h, 12h, 24h, 48h, 72h, 96h, 120h and 144h. The results showed that there were Aeromonas, Enterobacteriaceae, Vibrio, Flavobacterium, Acinetobacter, Pseudomonas, Corynebacterium, Staphylococcus and Bacillus in water and mucus before the water was treated with drug. And there were Micrococus and Alcaligenes in water especially. After the water was treated with drug, the bacterial number in water and mucus decreased to the fewest at 12h or 24h, then it returned to the former level at 48h or 96h. The composition of major bacterial flora in water and mucus did not change. But the proportion of Flavobacterium increased and Aeromonas, Vibrio and Enterobacteriaceae decreased significantly. Pseudomonas and Acinetob更多还原