‘Oysters are a risk, as is raw meat’: why you get food poisoning – and how to avoid it

Many would agree that a significant number of people in the modern world do not consider food poisoning a grave concern. While many people practice basic hygiene like washing hands after touching raw poultry and separating cutting boards, how many can truthfully claim they've never reused barbecue utensils or left cooked rice out at room temperature for hours? Ignore that rhetorical question for a moment, though – before you comment that of course everyone should do all those things, let’s talk about what’s happening in your body when it all goes horribly wrong.

The Mechanisms of Misery: How Contaminants Make You Sick

Fundamentally, foodborne illness strikes after ingesting contaminated items, yet the pathogenic strategies employed vary significantly. “Certain pathogens, like Bacillus cereus often located in leftover rice, generate toxins prior to consumption, leading to rapid-onset symptoms like violent vomiting in a matter of hours,” explains a doctor who often sees patients with food poisoning. Bacillus cereus also produces a second variety of toxic substance in the digestive tract, which can lead to loose stools. “Pathogens including Salmonella and specific E. coli types operate inside the body after ingestion, commonly sparking extended illness due to gut inflammation.”

While the speed of symptom emergence can offer clues about the offending microbe to a specialist, the reality is that such diagnostic detective work is seldom performed in typical cases.

“All of these bacteria work in different ways,” states an expert in microbiology. “The spiral-shaped Campylobacter jejuni, frequently present in poultry, literally drills through the intestinal wall. This contrasts with Shiga toxin-producing E. coli, which releases harmful substances. Despite different tactics, both result in inflammatory diarrhea and illness.” Consequently, although treatments like antibiotics exist, determining the correct prescription is challenging for physicians without a confirmed diagnosis.

“If you’ve got a stomach bug and you go to the doctor, typically they’re not going to give you antibiotics,” it is explained. “The reason for that is that if you’ve got the Shiga toxin-producing variant of E. coli, and if you then kill all those bugs with antibiotics, they’re just going to release all the toxins inside them and make you even more sick. So without a specific infection diagnosis, it’s quite often safer to just let things get better on their own.”

How to Avoid Illness: Key Food Safety Practices

What should you be doing to avoid all this unpleasantness? “Some of the most classic advice is still relevant,” it is recommended. “Oysters are always a risk, as is eating any kind of raw meat – there’s been a vogue for people to eat medium-rare burgers recently, which is a bit troubling.” This is because heat must eradicate pathogens on aerated surfaces. A whole cut of beef only requires external searing, whereas minced meat, with its increased surface area, demands complete and uniform cooking to be safe.

Rinsing raw poultry—a surprisingly persistent habit—is strongly discouraged because it aerosolizes bacteria, contaminating sinks, counters, and tools, thereby increasing the risk of cross-contamination. Core principles include maintaining cleanliness, segregating raw meats from other ingredients, rapidly chilling and refrigerating leftovers within two hours, and verifying doneness, potentially with a cooking thermometer. “Hand hygiene, crucial for stopping the spread of numerous infections, is equally vital here,” it is noted. “This translates to comprehensive handwashing following contact with food items and after any toilet visit.”

If Prevention Fails: Managing Symptoms and Recognizing Danger

If it all goes wrong, most people won’t have too much to worry about, assuming they aren’t in an at-risk population. “Dehydration poses the greatest threat during these episodes, underscoring the necessity of increased fluid intake and possibly electrolyte supplements,” doctors advise. “Resuming a nutritious diet aids healing, but initially, a bland regimen—often called the BRAT diet (bananas, rice, applesauce, toast)—can be helpful if regular foods are too difficult to tolerate.”

Rarely, a severe bout can trigger sepsis, indicated by a rapid pulse and feelings of faintness. Contact a healthcare professional without delay if such symptoms occur. “In a minority of cases, you might also develop post-infectious irritable bowel syndrome (IBS), which can be characterised by abdominal pain and bloating,” it is further explained. Persistent symptoms warrant a consultation with a physician.

On a positive note, most infections are short-lived, with the immune system effectively neutralizing the threat within a short period. The lesson? Perhaps be more mindful about utensil hygiene at your next barbecue.