Christine McCartney, a distinguished British medical microbiologist and tireless champion of public health, passed away on March 20, 2026, at the age of 79. Her impactful career spanned decades, leaving an indelible mark on infectious disease control and the integration of laboratory science with epidemiology. She was widely respected for her leadership, scientific acumen, and unwavering commitment to safeguarding public health across the United Kingdom.

Born and raised in Glasgow, Scotland, Christine was the elder daughter of Margaret and Donald McNiven. Despite her parents lacking an academic background, she was driven to pursue higher education, a testament to her early determination. She graduated from the University of Glasgow in 1967 with a degree in microbiology, laying the foundation for her remarkable career.

Her academic journey continued at the University of Glasgow, where she served as a research assistant and later a lecturer. During this period, she earned her PhD, investigating the properties of staphylococcal delta-toxin, and published numerous scientific papers. Her expertise was formally recognized in 1978 when she was elected a fellow of the Royal College of Pathologists.

In 1994, Christine moved to England, taking up a pivotal role as assistant director at the Central Public Health Laboratory in Colindale, part of the Public Health Laboratory Service. Following the incorporation of the PHLS into the Health Protection Agency (HPA) in 2003, she became the executive director of the Regional Microbiology Network. In this capacity, she played a central role in strengthening the vital links between laboratory microbiology and epidemiology, recognizing their interdependence for effective public health responses.

Her leadership was particularly evident during critical public health challenges. She championed the early adoption of whole-genome sequencing, fostering collaborations with leading universities and institutions. Notably, she advised the government crisis response committee (Cobra) following the 2006 poisoning of Alexander Litvinenko, interpreting complex technical findings and providing crucial guidance on public health risks. For her outstanding contributions, Christine was appointed an Officer of the Order of the British Empire (OBE) in 2007.

Although she formally retired from the HPA in 2012, Christine's expertise remained highly sought after. She continued to serve as a senior adviser to Duncan Selbie, then chief executive of Public Health England, and later as PHE's professional lead for scientists. Her colleagues remember her as an inspirational leader, warm, thoughtful, and possessing legendary communication skills, always making time for others and ensuring they felt valued.

Christine McCartney was diagnosed with cancer in 2020 and continued to work into 2021, until the COVID-19 pandemic made her ambassadorial role challenging. She is survived by her husband, Bill McCartney, whom she married in 1974. Her legacy as a pioneering medical microbiologist and a dedicated advocate for public health will continue to inspire future generations.