DUCKY CAN TURN OUT TO BE YUCKY

Scientists now have the dirt on the rubber ducky: Those cute yellow bath-time toys are (as some parents have long suspected) a haven for nasty bugs.

Swiss and American researchers counted the microbes swimming inside the toys, finding the murky liquid released when ducks were squeezed contained “potentially pathogenic bacteria” in four out of the five toys studied.

The bacteria found included legionella and Pseudomonas aeruginosa, a bacterium that is “often implicated in hospital-acquired infections,” the authors said in a statement.

The study by the Swiss Federal Institute of Aquatic Science and Technology, ETH Zurich and the University of Illinois was published in the journal Biofilms and

Microbiomes. It’s billed as one of the first in-depth scientific examinations of its kind.

They turned up a strikingly high volume – up to 75 million cells per square centimetre – and variety of bacteria and fungus in the ducks.

Tap water doesn’t usually foster the growth of bacteria, the scientists said, but low-quality polymers in the plastic materials give them the nutrients they need.

Bodily fluids such as urine and sweat as well as contaminants and even soap in bathwater add microbes and nutrients such as nitrogen and phosphorus and create balmy brine for bacteria.

“We’ve found very big differences between different bath animals,” said microbiologist and lead study author Lisa Neu, alluding to other types of bath toys such as rubber crocodiles that were also examined.

“One of the reasons was the material, because it (the plastic) releases carbon that can serve as food for the bacteria.”

While certain amounts of bacteria can help strengthen children’s immune systems, they can also lead to eye, ear and intestinal infections, the researchers said. Among the vulnerable users were children “who may enjoy squirting water from bath toys into their faces,” a statement from the institute said.

The scientists, who received funding from the Swiss government as part of broader research into household objects, say using higher-quality polymers to make the ducks could prevent bacterial and fungal growth.