Abstract
Waterborne transmission of Giardia duodenalis infection is well known and many outbreaks of waterborne giardiasis have been extensively documented. In this chapter the focus is on foodborne outbreaks of giardiasis. Although relatively few foodborne outbreaks have been documented compared with waterborne outbreaks, it is likely that this reflects the difficulties in identifying outbreaks associated with foodborne transmission. Of those foodborne outbreaks that have been identified and documented in detail, it is worth noting that a wide range of different food vehicles have been implicated. These include raw vegetables, fruit salad, oysters, tripe soup, home-canned salmon and Christmas pudding. The investigations around some of these outbreaks are discussed critically within the chapter, and also the potential for food-handlers to be the route of food contamination is reviewed.
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