The disease incidences of each year from 1999 to 2004 were 47.3%,59.6%,51.9%,46.7%,60.0% and 29.9%,respectivel y. The summit happened in August every year.

• 结果表明:中华绒螯蟹细菌性疾病发生与流行存在着季节性；其发病率年平均依次为47.；3%25、59