The sprinkler family of irrigation devices â used for about 15% of farm irrigation â is a bit better than flood irrigation in terms of efficiency, but thatâs not saying much. Bringing up the rear in terms of usage is drip irrigation, which is the method of choice for about 5% of farms.
The ready-to-eat cafeteria foods were also found to be contaminated with Escherichia coli, Staphylococcus aureus and Streptococcus faecalis at similar rates (Table 2). Up to half of the ready-to-eat foods were contaminated with two or more strains of these pathogenic bacteria (data not shown).
Foods may also be contaminated with bacteria during food preparation in a restaurant or home kitchen. If food preparers do not thoroughly wash their hands, kitchen utensils, cutting boards, and other kitchen surfaces that come into contact with raw foods, cross-contaminationâthe spread of bacteria from contaminated food to uncontaminated foodâmay occur.