高渗性脱水（hypertonic dehydration）以失水多于失钠、血清钠浓度>150mmol/L（150mEq/L）、 血浆渗透压>310mOsm /L为主要特征。 1.原因和机制
不到20%的患者罹患典型霍乱，伴有中度或重度脱水的体征。
Less than 20% of ill persons develop typical cholera with signs of moderate or severe dehydration.
至少有196人死亡，2634人因此病导致的腹泄，剧烈高烧，呕吐和重度脱水入院。
At least 196 people have died and 2, 634 have been hospitalised by the illness, which causes diarrhoea, acute fever, vomiting and severe dehydration.
在露营结束时，在128个孩子中，至少50%到75%的孩子是“重度”脱水，25%到30%的孩子是“严重”脱水。
By the end of the camps, between 50 and 75 percent of the 128 kids were at least “significantly” dehydrated, and in 25 to 30 percent of these, the condition was “serious.”
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