Chapter 2: Parasites, Bacteria, and Viruses Are Not the Same Thing
The word parasite is often used in alarming food-related headlines, but foodborne illness can be caused by several different types of organisms. Understanding the difference helps explain why not every contamination problem has the same cause or requires the same response.
Parasites, bacteria, and viruses are distinct. They behave differently, spread through different pathways, and may require different prevention and treatment strategies.
What are foodborne parasites?
Parasites are organisms that live in or on another organism and obtain resources from it. Some parasites can infect humans after exposure through contaminated food or water, while others are transmitted through different routes.
Certain intestinal parasites may be associated with symptoms such as diarrhea, abdominal discomfort, nausea, or prolonged digestive problems. However, these symptoms are not specific to parasitic infections. Bacterial infections, viral illnesses, food intolerances, and other conditions can produce similar symptoms.
It is therefore not possible to diagnose a parasite infection simply because someone ate raw green onions and later experienced stomach discomfort.
The relevant risk depends on the particular parasite, how contamination occurred, and whether the organism can survive and infect a person through the exposure in question.
Some parasites are associated with particular foods or environmental conditions rather than being a universal hazard across all raw vegetables. A responsible assessment should identify the organism and the plausible route of transmission instead of implying that every vegetable carries the same risk.
Bacteria can also contaminate raw produce
Bacteria are microscopic organisms found in many environments. Some are harmless or beneficial, while others can cause disease.
Certain foodborne bacteria may contaminate produce through water, soil, animal waste, equipment, or handling. If contaminated food is eaten, the consequences depend on the organism, the amount ingested, and the person's health.
Symptoms of foodborne bacterial illness can include diarrhea, abdominal cramps, nausea, vomiting, and fever. Some infections are mild and resolve without specific treatment, while others can cause serious complications.
The symptoms alone generally do not identify which organism is responsible. Medical evaluation and, in selected cases, laboratory testing may be needed.
Green onions are not exempt from bacterial contamination simply because they are a plant. But the possibility of contamination is not proof that a particular bunch is unsafe.
Viruses can spread through food handling
Some viruses that cause gastrointestinal illness can spread when food is handled by an infected person who does not wash their hands properly. Contamination can also occur through unsafe water or contact with contaminated surfaces.
In these circumstances, the problem may be less about the vegetable's natural growing environment and more about what happens during harvesting, preparation, or serving.
Washing hands with soap and water before preparing food, cleaning work surfaces, and keeping utensils sanitary help reduce the opportunity for contamination.
A vegetable may be washed carefully at home yet become contaminated again if it is chopped on a dirty board or handled with unwashed hands. Food safety therefore depends on the whole preparation process, not just the initial rinse.
Why the distinction matters
An article that says green onions are βloaded with parasitesβ may lead readers to believe that parasites are the only or most important concern. In reality, foodborne hazards include several categories of organisms, and their relative importance varies by food, location, and circumstances.
The right prevention measures depend on the likely pathway. Clean water and thorough rinsing can remove soil and reduce some surface contamination. Good hygiene helps prevent transfer from hands and surfaces. Refrigeration slows the growth of many microorganisms, while adequate cooking can reduce many hazards that remain.
None of these steps should be described as an absolute guarantee against every possible infection. Together, however, they form a sensible approach to reducing foodborne risk.
Chapter 3: How to Wash Green Onions Properly at Home
One of the most useful lessons from the article's warning is that the way vegetables are prepared matters. Washing green onions does not require special equipment or expensive products, but it does require more attention than a brief splash of water.
The aim is to remove visible soil, reduce surface contamination, and prevent anything on the outside from being transferred to the parts that will be eaten.
Step 1: Start with clean hands and a clean workspace
Before handling the onions, wash your hands thoroughly with soap and water. Clean the sink area, cutting board, knife, and any container you plan to use.
A sink that has recently held raw meat, dirty dishes, or contaminated items may transfer microorganisms to produce. If you use the sink to rinse vegetables, make sure it is clean first.
Avoid placing washed onions directly on a surface that held unwashed produce or raw animal products. Use a clean plate, colander, or cutting board.
Step 2: Inspect the bunch
Look for damaged leaves, slimy areas, mold, unpleasant odors, or signs of decay. Remove any portions that are clearly spoiled.
Discarding visibly damaged sections is sensible, but remember that appearance alone cannot prove that produce is free of harmful microorganisms. The goal of inspection is to remove material that is obviously unsuitable for eating, not to replace washing.
If the entire bunch has an unusual odor, extensive slime, or widespread spoilage, it is safer to discard it rather than attempt to rescue it by rinsing.
Step 3: Remove the roots and unwanted outer layers
Trim off the root ends and remove any outer layers that are heavily soiled, wilted, or damaged. Do not cut away more than necessary if the remaining onion is in good condition.
Removing the roots can make cleaning easier because soil often collects around that area. If the base contains compacted dirt, separate the layers gently so that running water can reach the spaces between them.
Use a clean knife and cutting board. If you cut the onions before washing them, the blade may transfer surface contamination onto the newly exposed interior tissue. For this reason, cleaning before chopping is a useful general practice.
Step 4: Rinse under clean running water
Hold the onions under clean running water and rub the surfaces gently with your fingers. Rotate the bunch so that water reaches the white bases and the green leaves.