Excerpt from www.forensicsciencetechnician.org/
1. Portable toilets
A combination of high traffic and no plumbing make portable toilets a veritable Shangri-la for bacteria and other microbes.
Though heavily sanitized in some areas, the main floor of the slaughterhouse involves hundreds of farm animals crammed into one tiny space. And then they get dead, and then they get hacked into meat. Suffice to say, slaughterhouses are rather germy establishments
4. Kitchen sinks
Most people do not realize it, but kitchen sinks are one of the dirtiest places in the home, harboring used dishes and their accompanying decaying food particles.
5. Door handles
No matter where they are located, door handles act as a magnet for germs, dirt, and assorted grime. They are one of the most guilty culprits in the spread of flu and colds.
10. Ganges River
Consistently ranked as one of the most polluted in the world, people coming into contact with Ganges water put themselves at risk for cholera, dysentery, cryptosporidium, and other water-borne illnesses.
11. Purses and handbags
Numerous studies have shown that the inside of purses, backpacks, and other daily transports harbor all sorts of unpleasant viruses and microbes. Food, gum, and other perishables only serve to make the situation worse.
13. Monkey cages
Monkeys sure are cute, what with looking like particularly fuzzy people and all. They also happen to really, really enjoy slinging their own feces about, too.
17. Oscar Wilde’s grave
Like a Parisian Blarney Stone, tourists traditionally leave a kiss for the celebrated Irish writer right on his tombstone. The rock is spotted with thousands of red lipstick smears and their associated microscopic companions.
Tons of trash, both organic and synthetic, cannot possibly be sanitary under any condition. The rusting, used razors and needles alone hold the potential to pass around any number of blood-borne diseases.
The sweat and oils from fingers and hands leave behind grime and communicable diseases such as the flu, colds, strep throat, and others. Public computers at libraries, schools, and other organizations pose the most threat.
24. Communal office equipment
Staplers, phones, chairs, copy machines, and other devices shared by an entire office follow the same basic logic as keyboards and playgrounds. If people touch it, it gets smeared with grease and filth and runs the risk of spreading all sorts of illnesses.
25. Cell phones
Many recent studies have shown that cell phones, which come into intimate contact with hands and mouths, are actually far dirtier than toilets.
According to The Wall Street Journal, teachers actually come into contact with more harmful bacteria than almost any other position.
33. Healthcare facilities
Obviously, some parts of hospitals and doctor’s offices remain almost completely sanitary. However, waiting and emergency rooms witness a multitude of illnesses on an hourly basis, and the biohazard depositories alone probably contain enough disease-ridden blood, pus, saliva, metabolic waste, tissues, and other human leavings to kill a bull elephant.
34. Nursing homes
Unfortunately, far too many elderly individuals end up in lackluster care centers that delay the cleaning of urine and feces or neglect changing their bed linens. This leads not only to bacteria which may cause serious illness – even death – in these centers’ frail inhabitants, but the possibility of terrible sores and infections as well.
41. ATM machines
ATMs see a lot of traffic, and with the sheer volume of hands passing over the buttons, the greasy oils and residues left behind provide a treasure trove of bacteria – many of whom may lead to unpleasant illnesses.
45. Gym equipment
Equipment at public gyms are basically relatively stationary versions of public transportation. The biggest difference being, of course, that these machines take it upon themselves to absorb all the sweat and accompanying bacteria.
48. Soap Dispensers
It may seem paradoxical that soap and soap dispensers – especially those in public restrooms – are actually quite dirty.
See full list at http://www.forensicsciencetechnician.org/50-germiest-places-in-the-world/