泰国官方今天证实，自十月14日以来，泰国著名的动物园是拉查龙虎园有23只成年虎因感染禽流感而死亡，估计病毒可能来自老虎的主要食物鸡。另有30多只老虎出现与禽流感一样的症状。新华社报道如下：Lab test confirmed that 23 tigers in a private zoo in eastern Thailand have died of infecting with avian influenza1 virus, officials said here on Tuesday.
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Tigers in the private zoo started to show flu symptoms since last Thursday and altogether 23 have died until Tuesday.
Symptom表示：预兆，征候；症兆，症候，比如：Fever is a symptom of many illnesses.（发烧是很多疾病的症兆。）和symptom有关的词组有：clinical symptom（临床症状）；well-defined symptom（明显症状）；deficiency symptom（营养缺少症状）；deficient symptom（内分泌缺少症状）；poisoning symptom（中毒症状）；eruption symptom（喷发预兆）；premonitory symptoms（地震预兆）等。
据了解，坐落于泰国春武里府东部的是拉查龙虎园距离首都曼谷约80公里，是游客前往海滨城市芭堤亚途中必游览的景点之一。动物园内有400只老虎，为预防禽流感病毒扩散，动物园从今天起暂时关闭。