Campylobacter most common pathogen found in dairy cattle A study conducted at 185 dairy farms found the Campylobacter bacterium at 91% of those farms. Out of the pathogens that were studied, this type of bacteria is the most common in dairy cattle.
Less air pollution from traffic and industry but increased contribution from agriculture International air policy has shown good results in Europe: in the past 35 years the air has become cleaner. Nevertheless air pollution is still an important cause of premature death.