The thought of parasites in your food might make you squirm, but they are a reality we must all be wary of.

An outbreak of the parasite Cyclospora in the US, with most cases being reported in Michigan, is a stark reminder of how quickly parasites can spread, even in developed nations.

Michigan health officials have identified lettuce and salad greens as a potential vector for the parasite, since it is transmitted by food and water contaminated by feces.