GERMANY – A comprehensive literature review published in the Journal of Health Monitoring by the Robert Koch Institute has shed light on the intricate relationship between climate change and foodborne microbial hazards.

Authored by experts from the German Federal Institute for Risk Assessment, the German Department for Safety in the Food Chain, and the Robert Koch Institute’s Department of Infectious Disease and Epidemiology, the study delves into the multifaceted impacts of shifting climate patterns on a range of pathogens and toxins that pose risks to human health, particularly in the context of the German food landscape.

The review outlines a range of foodborne hazards—Salmonella, Campylobacter, Vibrio, Cryptosporidium, Giardia, and marine biotoxins—and investigates how the changing variables of temperature, precipitation, and humidity are anticipated to influence their prevalence, reproduction, and survival.

With climate change increasingly recognized as a driver of health risks, the researchers endeavor to equip the industry and public health authorities with insights and recommendations for averting potential crises.


One of the key takeaways from the study is the projected amplification of risks associated with Campylobacter infections following heavy rainfall and flooding. Increased exposure to contaminated water in these events is correlated with heightened outbreaks and infections. The researchers highlight concerns about a possible future where water scarcity prompts the use of treated wastewater for food crop irrigation, thereby intensifying the likelihood of food contamination.

Salmonella’s heat-driven threat

For Salmonella, a pathogen that thrives in warmer climates, rising temperatures pose a significant threat. Studies indicate a correlation between temperature increases and a surge in salmonellosis cases, indicating a possible 8.8 percent increase in weekly cases per 1 °C temperature rise. The review also underscores the risks posed by increased rainfall, which can deteriorate water quality and lead to bacterial contamination.

Vibrio’s surge

Vibrio, a concern particularly for seafood safety, stands out as another consequence of warming waters. Vibrio’s prevalence is expected to surge with rising water temperatures, demanding stringent seafood safety measures.

Parasites on the rise

The study also delves into the risks linked to Cryptosporidium and Giardia, parasites that could see increased transmission due to heavier rainfall and flooding, introducing infectious particles to water bodies and crops. Similarly, marine biotoxins are highlighted as a potential concern due to harmful algal blooms triggered by warmer ocean temperatures, leading to toxins in seafood.

Mitigating risks

In the realm of mitigation, the review stresses the significance of kitchen hygiene, advocating practices like handwashing, cross-contamination prevention, and thorough food preparation.

Additionally, supply chain management’s role in food safety is emphasized, with suggestions for implementing digital technologies like blockchain, RFID tags, machine learning, and artificial intelligence to track products and identify potential risks along the supply chain.

As Germany and the global community grapple with the ramifications of climate change, the insights from this research stand as a clarion call for proactive measures to ensure food safety and safeguard public health in an evolving environmental landscape.

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