Campylobacter — common bacterial cause of gastroenteritis

Clinical features

In humans, Campylobacter infection—called campylobacteriosis—typically causes an acute gastrointestinal illness characterized by watery or sometimes bloody diarrhea, abdominal cramping, fever and general pain. The infection produces an inflammatory response in the intestinal mucosa, which can lead to bloody stools and other signs of inflammation. Symptoms usually appear after an incubation period of a few days and most uncomplicated cases resolve without specific antimicrobial treatment.

Transmission and common sources

Transmission occurs mainly through ingestion of contaminated food or water. Important vehicles include raw or undercooked meat—particularly raw chicken—unpasteurized milk and untreated water. Person-to-person spread is uncommon but possible in settings with close contact. Campylobacter infections often peak in warmer months in many regions, and some surveillance data show differences in incidence between subgroups such as males and females. Typical food-related risks include handling or eating contaminated poultry and cross-contamination in the kitchen.

Diagnosis, treatment and complications

Laboratory diagnosis is generally by stool culture or molecular tests that detect Campylobacter DNA. Most patients are managed with supportive care—rehydration and symptomatic treatment. Antibiotics may be recommended for severe illness, high-risk individuals, or systemic infection. Although rare, complications can include bloodstream infection in immunocompromised persons and post-infectious immune-mediated conditions such as Guillain-Barré syndrome.

Prevention and public health

Prevention focuses on safe food handling, thorough cooking of meats, pasteurization of dairy products, proper water treatment and on-farm measures to reduce contamination of poultry flocks. Public-health surveillance tracks cases to detect outbreaks linked to food or water and informs control measures. Regulatory agencies and consumer advisories periodically report on the prevalence of Campylobacter contamination in retail food supplies and recommend precautions to minimize risk.

Notable facts

• Campylobacter is a leading bacterial cause of food poisoning worldwide.
• It survives well in animal intestines and can be introduced into the food chain during slaughter and processing.
• Seasonal peaks and demographic patterns are monitored to guide prevention efforts.