Polymyxin E (colistin) is a medically important active substance both in human and veterinary medicine. Colistin has been used in veterinary medicine since the 1950s. Due to the discovery of the plasmid-borne mcr gene in 2015 and the simultaneously increased importance in human medicine as a last-resort antibiotic, the use of colistin for animals was scrutinised. Though veterinary colistin sales dropped by 76.5% between 2011 to 2020, few studies evaluated real-world data on the use patterns of colistin in different European countries and sectors. A survey among veterinarians revealed that 51.9% did not use or ceased colistin, 33.4% decreased their use, 10.4% stabilised their use, and 2.7% increased use. The most important indications for colistin use were gastrointestinal diseases in pigs followed by septicaemia in poultry. A total of 106 (16.0%) responding veterinarians reported governmental/industry restrictions regarding colistin use, most commonly mentioning “use only after susceptibility testing” (57%). In brief, colistin was perceived as an essential last-resort antibiotic in veterinary medicine for E. coli infections in pigs and poultry, where there is no alternative legal, safe, and efficacious antimicrobial available. To further reduce the need for colistin, synergistic preventive measures, including improved biosecurity, husbandry, and vaccinations, must be employed.

Whilst recognizing the abundantly positive aspects within the different domains of the veterinary profession, the challenging socio-economic and cultural working climate has been identified as a source of veterinary mental wellbeing issues. This mixed methods study provides an overview of the mental state of veterinarians across Europe via two cross-sectional surveys in 2018/2019 (n = 14,559 veterinarians) and in 2022/2023 (n = 12,393 veterinarians). Mental wellbeing was assessed using 3 indicators: self-reported stress levels, the need for medical leave due to reduced mental wellbeing (22% and 23%, resp., in 2018/2019 and 2022/2023) and the seven-question Warwick-Edinburgh Mental Wellbeing Scale (2018/2019: 25, 2022/2023: 24.8). In both surveys, important differences were spotlighted between countries, but early-career veterinarians and female veterinarians were most at risk of decreased mental wellbeing all over Europe for all indicators. In conclusion, stress levels and need for medical leave due to reduced mental wellbeing remained at comparatively high levels across the two surveys and standardized mental wellbeing scores remained equally low. Notwithstanding the increased attention given to veterinary wellbeing in the last decade, our results underline that major efforts remain necessary, by creating more supportive and attractive workplaces that prioritize wellbeing, a good work/life balance, and providing job satisfaction.

Major efforts have been made by veterinary professionals to reduce the need for antibiotic use in animals. An online survey launched by the Federation of Veterinarians of Europe (FVE) aimed to gather responses from practicing veterinarians with field experience in metaphylactic livestock group treatment. Only 17% of all veterinarians (n = 183/1087, all species-specific responses merged) applied metaphylactic group treatments to 75% or more of all their treatments. Significantly less metaphylactic group treatments were reported in mixed practices (p = 0.002) and practices specialized in cattle (p < 0.001) as well as small (p = 0.007) and very small practices (p = 0.009). Gram-negative bacteria, mostly composed of Enterobacteriaceae and Pasteurellaceae, were considered by 75.3% (n = 967/1385) as the most devastating bacterial pathogens. Respondents alleged morbidity (20.1%, n = 201/998) and mortality (42.2%, n = 421/998) as major consequences for animal health and welfare if metaphylaxis would be banned. Responding veterinarians pointed towards vaccinations; improved biosecurity, including hygiene measures; and improved herd health management as the three most effective alternative measures to prevent metaphylactic treatment. However, more research is needed on how to implement appropriate alternatives in a holistic hurdle approach. Active support on a national level will be necessary for the development and application of targeted veterinary treatment guidelines for practitioners, which promote the understanding of drivers and include initiation criteria for metaphylactic group treatments in livestock.