UPDATE 1-HK girl treated after drinking tainted milk

changes dateline)
BEIJING, Sept 21 (Reuters) - A three-year-old Hong Kong girl was found to have a kidney stone after drinking tainted milk and Brunei banned imports of milk products from China, the latest developments in the widening milk scandal.
Hong Kong health authorities said in a statement issued late on Saturday that the girl did not have any symptoms, but had a checkup after consuming Yili brand milk beverage daily for the past 15 months.
The girl was the territory's first suspected victim of a scandal that has sparked an outcry from China's trading partners.
While Brunei's health ministry said the country does not directly import dairy items from China, the ban took effect after similar moves by Singapore and Malaysia on Friday.
Yili Industrial Group Co (600887.SS: Quote, Profile, Research, Stock Buzz), the Sanlu Group -- the country's largest infant milk powder maker -- along with 19 other dairy producers vowed to improve the quality of their products and make appropriate reparations to victims, state media reported on Sunday.
China last week ordered checks on dairy products and a nationwide recall of suspect products, in a spreading scandal that has killed four children and caused thousands more to fall ill from consuming dairy products.
The Hong Kong girl was discharged from hospital on Saturday.
Samples of the product consumed by the girl were found to have been adulterated with melamine, a chemical that can cause kidney stones and can lead to renal failure among children. "Her condition is good. She did not receive any operation," said a spokeswoman for the Princess Margaret Hospital.
A government food quality watchdog in China has said nearly 10 percent of milk and drinking yoghurt samples from three major dairy companies contained potentially deadly melamine.
The nitrogen-rich compound can be added to watered-down milk to get past quality inspections, which check for nitrogen to measure protein levels.
(Reporting by Jeffrey Hodgson in Hong Kong, Kirby Chien in Beijing and David Chance in Kuala Lumpur; Editing by David.