The researchers identified the filthiest areas of a car:
1. Boot - 1,425 bacteria identified
2. Driver’s seat - 649 bacteria identified
3. Gearstick - 407 bacteria identified
4. Back seat - 323 bacteria identified
5. Dashboard - 317 bacteria identified
6. Steering wheel - 146 bacteria identified.
Vehicles sampled:
• Car 1: Peugeot 307-SW; 17 years old; animals; bought second hand with one previous owner.
• Car 2: VW Golf; 5 years old; animals and children; bought third hand with two previous owners.
• Car 3: Ford Focus; 13 years old; animals and children; bought second hand with one previous owner.
• Car 4: Honda Jazz; 9 years old; animals and children; bought third hand with two previous owners.
• Car 5: Peugeot 308; 2 years old; bought second hand with one previous owner.
Toilets:
Two domestic toilets were chosen that had not been knowingly cleaned but had been used in the preceding 24 hours.