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Direct contact
Improper skin preparation is the most common cause of contamination when drawing blood cultures.
route 66
contamination of food during preparation
Coughing sneezing and touching
oral
INHALATION
The most common reason for food born illness is contamination of the food. If the food is exposed to things such as animal feces or workers handling the product with dirty hands, then there is a risk of contamination.
The most common route of entry for hazardous materials is inhalation, closely followed by skin contact.http://wiki.answers.com/What_is_the_most_common_route_of_entry_for_hazardous_materials#ixzz1tCem38SH
Inhalation
Inhalation
stuff like unclean utensils and the bacteria getting onto your food and you eating it