Surge in Campylobacter Infections Reported in Sweden This Summer
Sweden sees a sharp rise in campylobacter infections during summer 2025.
Key Points
- • Campylobacter infections rose from 30 to 70 cases per week in late June 2025.
- • Symptoms typically develop within 1-3 days after infection.
- • Improper handling of chicken is a major infection source.
- • Infections are also linked to animal contact, unpasteurized milk, and untreated water.
Sweden is currently facing a significant uptick in campylobacter infections, with reported cases rising sharply in late June 2025. According to the Swedish Public Health Agency, the weekly count of infections jumped from 30 cases in early June to around 70 by the last week of June. This increase coincides with seasonal trends typically observed during summer months, a time when such infections are more prevalent due to heightened levels of campylobacter in chicken flocks.
Symptoms associated with campylobacter include diarrhea, stomach pain, nausea, vomiting, and fever, which usually manifest within one to three days after exposure. The health authority has highlighted that improper handling or undercooking of chicken remains a leading source of these infections. This warning aligns with findings that show a tangible link between the levels of campylobacter found in poultry and the infection rates in humans.
Moreover, individuals are cautioned to be aware of other potential sources of infection, including direct contact with animals, consumption of unpasteurized milk, and drinking contaminated water, particularly from untreated natural sources. The public health agency is urging citizens to follow food safety guidelines to prevent further infection. This information was last updated on July 3, 2025.