>Scared invisible bacteria are crawling all over the soiled bank notes? You can be at ease. Australian researchers have conclusively shown that such fears are needless apprehensions.
Led by University of Ballarat’s food microbiologist Dr Frank Vriesekoop, a global research team analysed banknotes from at least ten nations.
We found only very low levels of pathogenic bacteria in any of the banknotes, and never in alarming numbers,” said Dr. Vrieskoop.
However, he admitted that the richer and more developed countries had fewer bacteria on their money than poorer countries.
“Importantly, nowhere in the world were alarming levels of pathogenic bacteria found on money.
“We also found the age of the banknotes, and the material of which they are made will affect the extend of contamination of that money.”
The international study included researchers from ten universities and research institutes research institutes.
A total of 1280 banknotes were collected from food outlets such as foodshops and cafeterias, and then carefully screened to ascertain the presence of bacteria.
The countries where the research was conducted include Australia, Burkina Faso, China, Ireland, Mexico, Netherlands, New Zealand, Nigeria, the United Kingdom and the United States.
The researchers recently published their research in the sicentific journal Foodborne Pathogens and Disease.
“The older notes are more wrinkled, so that dirt and bacteria can easily nestle in the folds of the notes,” Dr Vriesekoop said.
“The material the banknotes are made of was also found to be important. In most countries banknotes are made from a cotton based material; while in Australia, New Zealand, and Mexico the banknotes are made from a polymer (plastic) material.