A nonthreatening amount of melamine has been found in a milkshake at a Chinese restaurant in southern Austria, the Health Ministry said Thursday.

Melamine-contaminated milk has killed four babies and sickened more than 50,000 children in mainland China -- prompting tests on Chinese products around the world.

Austrian authorities inspecting random samples found a small amount of the substance in a milkshake at a restaurant in Graz.

The milkshake had not been sold to a customers, and no one was sickened by it, the ministry said. It came from a Chinese store in Vienna and is off the market.

In two weeks Austrian authorities have tested 184 Chinese food products, with 107 tests coming back negative for melamine. Only the milkshake has tested positive so far; other results are still outstanding.

Health experts say ingesting a small amount of melamine poses no danger, but in larger doses, the chemical -- used to make plastics and fertilizer -- can cause kidney stones and lead to kidney failure. Infants are particularly vulnerable.

Melamine-tainted products have turned up in an increasing number of Chinese-made exports abroad -- from candies to yogurt to rice balls.

The European Union last week banned imports of baby food containing Chinese milk. The move by the 27-nation EU adds to the growing list of countries that have banned or recalled Chinese dairy products because of the contamination.

奥地利卫生部周四说，在南部一个中国餐馆的奶昔中发现微量三聚氰胺。

含有三聚氰胺的污染奶粉已导致中国大陆四名婴儿死亡，超过5万儿童生病，这导致全球对中国产品进行检测。

奥地利政府随机检查了一部分样品，在格拉茨一个中国餐馆的奶昔中发现微量三聚氰胺。

卫生部说，该奶昔还未进行销售，因而未对任何人造成伤害。生产这种奶昔的一家维也纳一家商店已被取缔。

两周内奥地利已对184种中国食品进行了检测，107种食品不含三聚氰铵，目前仅奶昔中被检出含有这种物质，其他结果尚未揭晓。

健康专家说摄入微量三聚氰铵不会对身体造成损害，但是量大的话，这种用来生产塑料和化肥的化学物质可能导致肾结石或肾衰竭，婴儿尤易患病。

受三聚氰铵污染的产品在中国出口商品中呈上升趋势：从糖果到酸奶到饭团。

欧盟上周禁止进口含中国奶制品的婴儿食品。由27个欧盟成员国发起的这场运动使因污染问题禁止或召回中国奶制品的国家越来越多。