Rise in Campylobacter Cases in Sweden This Summer

The number of cases of people affected by the intestinal bacteria campylobacter is increasing right now in Sweden – from about 30 per week in early June to over 200 cases last week. It is very seasonal. From July, the number of reports starts to increase significantly, says Rikard Dryselius, investigator at the Public Health Agency.

» Published: July 30 2025 at 05:30

Rise in Campylobacter Cases in Sweden This Summer
Photo: Johan Nilsson/TT

Share this article

Campylobacter is a common bacterium that both humans and animals can carry. In humans, it causes diarrhea, fever, and nausea, sometimes vomiting. The symptoms last for a few days and often go away on their own.

More severe symptoms occur but are rare.

The number of cases usually reaches a peak in August and then decreases towards the fall, says Rikard Dryselius.

The most common way for humans to get the bacterium is through chicken.

This is because the infection is transmitted through so-called vectors, i.e. flies and other animal life that transmit the bacteria to chicken flocks.

There is more life and movement in nature during the summer than in the winter, and that's why it's much more common to have campylobacter in the summer when it's warm, says Rikard Dryselius.

Therefore, it is important to maintain good kitchen hygiene when food, especially chicken, is cooked.

It's important to heat the food to 70 degrees, preferably for a longer period, then the bacteria die. And make sure not to put the cooked food on the plate you had the raw meat on. And wash your hands.

Campylobacter can also be spread through livestock and pets, or through unpasteurized milk. But also through water.

There are those who become infected when they drink from mountain streams that can be contaminated by animals. But seen over the whole year, it's not that common.

According to the infectious diseases act, all cases of campylobacter infection must be reported to the infectious disease doctor. Suspected outbreaks from water and food must be notified to the environmental office or equivalent in the municipality.

Loading related articles...

Tags

Author

TTT
By TTEnglish edition by Sweden Herald, adapted for local and international readers

More news

Woman in Her 70s Dies in Drowning Accident Near Uppsala
1 MIN READ

Woman in Her 70s Dies in Drowning Accident Near Uppsala

Government Seeks Social Democrats' Support to Pressure Israel
1 MIN READ

Government Seeks Social Democrats' Support to Pressure Israel

Man Acquitted in Malmö Knife Murder Case
1 MIN READ

Man Acquitted in Malmö Knife Murder Case

Hesa Fredrik Alarm Sirens Stolen in Dalarna
1 MIN READ

Hesa Fredrik Alarm Sirens Stolen in Dalarna

Nearly 50 Burglaries in July as Thieves Remove Windows
1 MIN READ

Nearly 50 Burglaries in July as Thieves Remove Windows

11 Drowning Deaths in 10 Days Highlight Summer Safety Concerns
3 MIN READ

11 Drowning Deaths in 10 Days Highlight Summer Safety Concerns

Woman in Honor Killing Case Found Mentally Fit for Trial
1 MIN READ

Woman in Honor Killing Case Found Mentally Fit for Trial

Israel Holds Key to Ending Gaza Starvation Crisis, Says Minister Dousa
2 MIN READ

Israel Holds Key to Ending Gaza Starvation Crisis, Says Minister Dousa

Coop Recalls Extreme Sour Fusion Ice Cream Due to Missing Warning
1 MIN READ

Coop Recalls Extreme Sour Fusion Ice Cream Due to Missing Warning

Missing Diver in Lake Haggen Found Dead
1 MIN READ

Missing Diver in Lake Haggen Found Dead

Truck Accident Disrupts Train Traffic Between Malmö and Copenhagen
1 MIN READ

Truck Accident Disrupts Train Traffic Between Malmö and Copenhagen

Boy Who Escaped Falköping Juvenile Detention Caught by Police
1 MIN READ

Boy Who Escaped Falköping Juvenile Detention Caught by Police

Social Democrats Propose International Rescue Fleet for Gaza Aid
2 MIN READ

Social Democrats Propose International Rescue Fleet for Gaza Aid

Boy, 5, Drowns in Boden Pool Accident
1 MIN READ

Boy, 5, Drowns in Boden Pool Accident

Polish Storm Karl-Heinz May Trigger Mosquito Surge in Sweden
3 MIN READ

Polish Storm Karl-Heinz May Trigger Mosquito Surge in Sweden

Fish Die-Off in Laholm Stream Linked to Severe Discharge
1 MIN READ

Fish Die-Off in Laholm Stream Linked to Severe Discharge

Man in 80s Dies After Traffic Accident Near Eskilstuna
1 MIN READ

Man in 80s Dies After Traffic Accident Near Eskilstuna

Hope Fades for Life on Distant Planet K2-18b
2 MIN READ

Hope Fades for Life on Distant Planet K2-18b

Man Dies After Drowning Incident in Eskilstuna
1 MIN READ

Man Dies After Drowning Incident in Eskilstuna

Man in 30s Dies in Trollhättan Workplace Accident
1 MIN READ

Man in 30s Dies in Trollhättan Workplace Accident