Hazardous chemicals have been found in street foods, and food exposed for sale on roadsides may become contaminated by lead from vehicle exhausts.
Health dangers may arise from: purchase of raw around of poor quality; improper storage, processing, and cooking, leading to reuse of water; limited piped drinking-water; lack of refrigeration; unsatisfactory waste-disposal facilities; and personal cleanliness.
The authorities should take into account the potentials of different categories of food for transmitting disease, and should control appropriately for the different categories sellers of bottled drinks require less control than those of food. Dry foodstuff, dried grains, and sugared foods are less likely to transmit disease than gravies, cooked rice, and low-acid milk, egg, and meat products. Similarly foods which are thoroughly cooked and eaten at once are safer than precooked food kept at high temperatures for several hours. [卫生类B]
健康食品
街头小贩,特别是在发展中国家,为低收入的人们提供了大量的食品。在发展中国家,这个部门雇佣了6% ~ 25%的劳动力,特别是妇女,而且为农业生产和其他生产提供市场。但是在许多国家,官方不愿承认这是食品供应系统的一个正式部门。他们在食品控制纲要中可能对它忽略不计,甚至企图终止这个部门。
有两种可能的污染源:致病的微生物,有毒的化学制品。就微生物而言,没有明显的有力证据证明街头食品比旅馆的食品更能传播传染病。埃及和其他地方的研究已经发现在微生物污染方面街头食品并不比旅馆食品差人们发现一些街头食品被病原体所污染,但在相同地区的一些四、五星级的旅馆中的食品同样也受到病原体的污染。
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