What Happens When You Get Salmonella: Symptoms, Treatment & Recovery

Introduction

Salmonella is one of the most common causes of foodborne illness in Australia. Each year, thousands of Australians fall ill due to this bacterial infection, which can cause anything from mild gastro symptoms to severe complications requiring hospitalisation.

In this comprehensive guide, you will learn exactly what happens when you get salmonella, how it spreads, its effects on the body, diagnosis, treatment options, recovery timelines, and how you can protect yourself and others.

Key Takeaways – Salmonella Infection

• Salmonella is a leading cause of foodborne illness in Australia.
  
• Symptoms usually appear 6-72 hours after exposure and include diarrhoea, cramps, nausea, and fever.
  
• Most cases resolve within 4-7 days with hydration and rest.
  
• Severe infections may require medical treatment or antibiotics.
  
• Good food hygiene, proper cooking, and handwashing can prevent infection.
  
• High-risk groups include infants, older adults, and people with weakened immune systems.
  
• Food handlers must follow exclusion rules and report salmonella cases promptly.
  

Salmonella Infection: Causes and Risk Factors

Understanding Salmonella Bacteria

Salmonella is a genus of rod-shaped bacteria, with Salmonella enterica being the most common species infecting humans. Within this species, serotypes such as S. Typhimurium and S. Enteritidis are frequently responsible for outbreaks in Australia.

These bacteria thrive in the intestines of animals and humans and are usually transmitted through contaminated food or water.

Common Sources of Contamination in Australia

• Raw or undercooked eggs and egg-based products (e.g. mayonnaise, desserts)
  
• Raw poultry and meat not properly cooked
  
• Unpasteurised dairy products
  
• Sprouts and leafy greens
  
• Contaminated water
  

Other non-food sources include:

• Reptiles, amphibians, and chickens (particularly in petting zoos)
  
• Poor hand hygiene after toilet use or handling animals
  
• Cross-contamination in kitchens and food preparation areas
  

Everyday environments such as home kitchens, cafés, and childcare facilities can pose risks if hygiene practices are neglected.

What Happens in the Body When You Get Salmonella?

The Incubation Period and Onset of Symptoms

Once salmonella bacteria are ingested, they survive stomach acid and move into the intestines, where they multiply. The incubation period is usually 6–72 hours.

Some people may carry the bacteria without symptoms (asymptomatic carriers) but can still spread it to others.

Gastrointestinal Effects and Inflammation

As the bacteria multiply, they irritate the intestinal lining, causing gastroenteritis. This inflammation leads to:

• Diarrhoea
  
• Abdominal cramps
  
• Nausea and vomiting
  

Salmonella Symptoms and Warning Signs

Common Symptoms (6–72 Hours Post-Infection)

• Watery or bloody diarrhoea
  
• Fever (mild to moderate)
  
• Stomach cramps
  
• Nausea and vomiting
  
• Headache
  
• Muscle aches
  
• Loss of appetite
  

Severe Symptoms That Require Medical Attention

• Persistent high fever (above 38.5°C)
  
• Blood in stool
  
• Signs of dehydration (dizziness, dark urine, dry mouth)
  
• Lethargy or confusion
  
• Ongoing vomiting without improvement
  

If these symptoms occur, see a GP immediately or visit an emergency department.

How Is Salmonella Diagnosed?

Stool Testing and Lab Confirmation

Doctors usually request a stool sample, which pathology labs test to identify the bacteria.

Medical Evaluation and Risk Assessment

Healthcare providers may also assess:

• Symptom severity and duration
  
• Signs of dehydration
  
• Whether you are in a high-risk group (infants, elderly, immunocompromised)
  

Blood tests may be ordered to check for systemic infection.

Salmonella Treatment and Home Care Tips

Home Care and Symptom Relief

For most people, salmonella resolves without antibiotics in 4–7 days. Recommended strategies include:

• Hydration: Drink water, oral rehydration solutions, or electrolyte fluids
  
• Rest: Allow your body time to recover
  
• Diet: Eat small, bland meals such as toast, rice, and bananas
  
• Avoid sugary drinks, caffeine, alcohol, and dairy during illness
  

When Are Antibiotics Required?

Antibiotics are reserved for severe cases or vulnerable groups such as:

• Infants and children
  
• Elderly individuals
  
• Immunocompromised people
  
• Those with bloodstream infections
  

Self-prescribing antibiotics is strongly discouraged due to resistance risks.

What Not to Do During Recovery

• Avoid anti-diarrhoeal medications (e.g. loperamide) unless directed by a GP
  
• Do not return to work too soon, especially in food handling or healthcare roles
  

Recovery Time and What to Expect

How Long Does It Take to Recover?

Most people recover within a week, but fatigue may linger longer. Severe cases can last up to 10 days or more.

Post-Infection Precautions

• Wash hands thoroughly after using the toilet
  
• Wait 48 hours after symptoms stop before returning to work or school
  
• Avoid preparing food for others until fully recovered
  
• Some workplaces require medical clearance before return
  

Complications and Long-Term Effects

Dehydration and Electrolyte Imbalance

Dehydration is the most common complication, particularly in:

• Children
  
• Older adults
  
• People with chronic illness
  

Reactive Arthritis and Other Long-Term Issues

Rarely, salmonella infection can trigger:

• Reactive arthritis (joint pain, redness, swelling)
  
• Kidney problems
  
• Septicaemia (bacteria in the bloodstream)
  
• Post-infectious irritable bowel symptoms
  

Preventing Salmonella: Food Safety & Hygiene

Food Safety Tips at Home and Work

• Cook poultry and meat to safe internal temperatures
  
• Avoid raw eggs in dressings or desserts
  
• Wash fruits and vegetables thoroughly
  
• Separate raw and cooked foods
  
• Store foods at safe temperatures (below 5°C or above 60°C)
  

Personal Hygiene and Handwashing

• Wash hands before meals, after toilet use, and after handling pets
  
• Use warm water and soap for at least 20 seconds
  
• Dry hands with a clean towel or air dryer
  

When to Seek Help and Notify Authorities

Signs You Need Medical Care Urgently

Seek medical help if you experience:

• High fever or chills
  
• Persistent vomiting
  
• Confusion or fainting
  
• Blood in vomit or stool
  

Reporting to Public Health or Employers

If you work in food handling, healthcare, childcare, or aged care:

• Notify your employer immediately
  
• Follow 48-hour exclusion rules
  
• In some states, salmonella must be reported to public health units to help prevent outbreaks
  

FAQs

How long does it take to get sick after eating salmonella-contaminated food?

Typically 6–72 hours after ingestion.

What are the first signs of salmonella infection?

Diarrhoea, stomach cramps, and fever are the most common first symptoms.

Can salmonella go away on its own?

Yes. Most cases resolve without treatment in a few days.

When should I see a doctor for salmonella?

If symptoms are severe, persistent, or if you are in a high-risk group.

Is salmonella contagious from person to person?

Yes. It can spread through poor hygiene, particularly after toilet use or food preparation.

How is salmonella diagnosed in Australia?

Through stool testing and medical evaluation.

What should I eat during a salmonella infection?

Stick to bland foods such as rice, toast, and bananas. Avoid fatty, spicy, or heavy meals.

How do I prevent salmonella in my kitchen?

Practise good food hygiene, avoid cross-contamination, and cook meats thoroughly.

Can I go to work if I have salmonella?

No. Wait at least 48 hours after your last symptom before returning.

What are the long-term complications of salmonella?

Rarely, complications include reactive arthritis, dehydration, or bloodstream infection.