Which of the following is among the four most costly foodborne pathogens in terms of illness burden?

• A. Staphylococcus aureus
• B. Clostridium perfringens
• C. Clostridium botulinum
• D. Campylobacter jejuni

Answer: (D)

Illness burden combines how often people get sick with how severe and long-lasting the illness is, including any long-term health effects. Campylobacter jejuni stands out because it causes a large number of foodborne illnesses each year, and while many cases are self-limited, a substantial share leads to significant symptoms, healthcare visits, and occasional long-term complications such as reactive arthritis or Guillain-Barré syndrome. That combination of high incidence and meaningful morbidity pushes Campylobacter into the top four for overall burden.

The other organisms listed tend to contribute less to total burden despite causing illness. Staphylococcus aureus food poisoning is common but typically short and mild. Clostridium perfringens causes acute illness that is usually brief. Clostridium botulinum infections are very severe but extremely rare, so they don’t accumulate a high population-level burden.