BEIJING, China (CNN) -- African governments have stopped importing Chinese dairy products as the crisis which has seen more than 52,000 Chinese children poisoned by melamine-tainted goods spreads.



Burundi, Gabon and Tanzania have joined governments closer to China -- including Indonesia, Taiwan, Japan, Singapore and Malaysia -- in banning Chinese dairy products. At least 11 countries have banned imports.



The precautions come as the number of affected children in China continues to swell. Four babies have died from melamine-tainted infant formula and more than 52,000 children have fallen ill, Chinese authorities say.



"I think we will see more cases, but it is, of course, impossible to predict how many cases there finally will be," said Hans Troedsson, the the World Health Organization's China representative. "We have to remember that China is a large country with a population of 1.3 billion people. However, of course, 40- to 50,000 children are affected as reported now. It's a staggering figure, but where we will end up is too early yet to say."



On Monday, China's top quality control official, Li Changjiang, resigned as a result of the scandal, which has seen the arrest of at least 18 people.



Two brothers arrested last week on charges of selling contaminated milk could face death if convicted, according to China Daily, a state-run newspaper. The raw milk used to produce powdered baby formula had been watered down and the chemical melamine was added to fool quality checks, the newspaper said.  Watch CNN visit the company at the center of the scandal »



Chinese Premier Wen Jiabao visited Beijing hospitals and a supermarket to show his concern. China's Health Ministry said about 13,000 children were hospitalized, while another 40,000 had undergone outpatient treatment.



"What we need to do now is to ensure that nothing like this happens in the future, not only in dairy products, but in all foods," he said. "Manufacturers and owners of dairy companies should show more morality and social responsibility in these cases. They are heartless, so we have to create strict law and legislation. I'm sorry."  Watch how Beijing is under pressure over public safety »



The repercussions from the scandal were felt as far away as Africa.



Burundi imports milk products from two suspect Chinese companies and the government has set up a commission to investigate how much tainted product could remain on store shelves, officials said.



"For the moment, nobody knows if the milk is being sold on the Burundi market," Noel Nkurunziza, president of a Burundi consumer association known as ABUCO, is quoted as saying in The Guardian newspaper and other publications.



In Asia, Singapore announced a recall of all Chinese milk products on Tuesday.



The head of Indonesia's Food Safety Watch said she was instituting a temporary ban of all milk imports from China, although contaminated milk has not been found in the country.



In issuing its recall of milk products, Singapore had already suspended the import and sale of milk and dairy products from China on Friday, after it said it has found traces of melamine in three Chinese-made dairy products.



The Agri-Food and Veterinary Authority said "White Rabbit Creamy Candy" was ordered off of shelves after tests showed it was contaminated. White Rabbit is among the best-known candy brands in China and one of the few exported widely. The United States is among 40 nations that import the candy, a man in the administrative office of the Shanghai-based company told CNN Monday.



Earlier, Singapore's agri-food agency said it found melamine in two other milk-based Chinese imports: the Yili brand "Choice Dairy Fruit Bar Yoghurt Flavored Ice Confection" and the Dutch Lady brand of strawberry-flavored milk.



In Bangladesh, three Chinese powdered milk brands -- Sanlu, Suncare and Yashili -- have been taken off shelves and all milk powder imports at Bangladeshi ports will be inspected. Bangladeshi TV showed the country's Rapid Action Battalion climbing over a fence to raid a storage facility believed to contain tainted milk.



In Malaysia, Health Minister Datuk Liow
What number of many children have been reported ill from tainted milk powder? how many infants died? Suspect milk from what country has been banned? wich are the countrys who banned the import from china? what are the reason for the Head of China's quality watchdog give up What have Singapore, Taiwan, and others imposed? How many infants are dead in China? Over what did the head of China's quality watchdog resign over?
52,000 Four babies Chinese dairy Burundi, Gabon and Tanzania the scandal, which has seen the arrest of at least 18 people. banned imports. Four babies Chinese children poisoned by melamine-tainted goods
question: What number of many children have been reported ill from tainted milk powder?, answer: 52,000 | question: how many infants died?, answer: Four babies | question: Suspect milk from what country has been banned?, answer: Chinese dairy | question: wich are the countrys who banned the import from china?, answer: Burundi, Gabon and Tanzania | question: what are the reason for the Head of China's quality watchdog give up, answer: the scandal, which has seen the arrest of at least 18 people. | question: What have Singapore, Taiwan, and others imposed?, answer: banned imports. | question: How many infants are dead in China?, answer: Four babies | question: Over what did the head of China's quality watchdog resign over?, answer: Chinese children poisoned by melamine-tainted goods