Cash is on the decline and global transactions are going digital - could it be a reason to ditch paper
Bills change hands an average of 110 times a year, so just imagine the harbouring germs and nasty
bacteria on currency surfaces. With casinos
receiving millions of visitors every single year from people all over the world, we’ve taken a look at
the currency coming in to find out what is really lurking on our cash.
In The Lab
We gathered 20 of the most used casino currencies from around the world and partnered with
microbiologists who conducted swab tests to find out what types of hidden bacteria are on our
The results from the lab were fascinating, where qualitative and quantitative data was collated
from the various bacterial colonies found on each note, which brought to light how different
types of bacteria can impact the public. Our researchers even found strains of bacteria that
cause food poisoning, pneumonia and ringworm.
The 20 filthiest banknotes
Most common bacteria:
Cerevisiae can cause urinary tract
Fusarisum commonly causes Keratis
racemosus causes a respiratory fungal
Rhizopus commonly causes Zygomycosis (Fungal
Micrococcus can cause pneumonia*
Under the microscope
Microbes cover us and everything we touch, so it is no surprise that your hard-earned cash is
covered in them. With 209 bacterial colonies found, Canadian Dollars contain harmful bacteria such
as Bacillus, with strains that can cause food poisoning and in rare cases, anthrax.
118 bacterial colonies on the Brazilian Real revealed Alternaria, Penicillium, Fusarium and
Saccharomyces Cerevisiae. The latter, commonly known as baker's yeast, can be known to cause
illnesses in the immunosuppressed such as pneumonia and urinary tract infections, as well as
infections to the inner lining of the heart and abdomen.
Dropping to double figures, Hong Kong Dollars were found to have 42 bacterial colonies including
Saccharomyces Cerevisiae, Penicillium, Micrococcus and Trichisporon, which is a fungus that can lead
to White Piedra, a yeast infection of the hair.
Filthy money, healthy economy
The Gambling Economy in 2019
Tax Impact & Tribal Revenue Share in 2019
*Data provided by American Gaming Association is only available in
states where gambling is legal.
Gambling contributes $37,035,950,000 to the US economy
The US gaming industry is vital to the country's economic health, where in 2019 alone,
$37,035,950,000 was generated in gambling taxes for the US economy. As Gambling is such a
lucrative industry, we looked into how much money casinos are generating in America through tax
revenue and tribal revenue share.
According to Gambling.com's calculations, gambling comprised
4.66% of Nevada’s state GDP, where a whopping $8,270,000,000 in state revenue was generated for
the Silver state in 2019. More than double California, which was the second highest state with
$3,450,000,000, these figures reveal what an integral part casinos play in Nevada’s economic
Working with the Currency Online Group our research team were able to
grow and swab bacteria from twenty different paper currencies, before analyzing the
Bill circulation information from ngpf.org
Using data from the American Gaming Association we were able to analyze
the tax revenue levels from the gambling industry across the United States.
data from Statista.com