Which method can fully eliminate shigellosis?

While it may seem logical to consider that a combination of methods would be necessary to deal with a foodborne illness like shigellosis, in reality, only specific strategies effectively control and eliminate the bacteria responsible for it.

Antibiotic treatment can help manage the infection in individuals who have already contracted shigellosis, but it is not preventive. Handwashing is a crucial practice that significantly reduces the transmission of the bacteria, especially in food handling settings, but it cannot completely eradicate the risk. In terms of vaccination, as of the current knowledge timeline, there is no commercially available vaccine for shigellosis that would guarantee complete immunity.

Thus, while each of these methods plays a role in managing or preventing the spread of shigellosis, none can fully eliminate the risk of infection on their own. Therefore, the notion that "all of the above" provides a complete solution is misleading. Thus, the correct understanding is that while each option contributes to controlling shigellosis, collectively they do not guarantee full elimination of the disease.