RT Journal Article SR Electronic T1 Global prevalence of Borrelia burgdorferi and Anaplasma phagocytophilum coinfection in Ixodes tick populations: protocol for a systematic review and meta-analysis JF BMJ Open JO BMJ Open FD British Medical Journal Publishing Group SP e083052 DO 10.1136/bmjopen-2023-083052 VO 14 IS 6 A1 Luo, Suyi A1 Bao, Fukai A1 Wu, Hanxin A1 Ma, Weijie A1 Zhu, Liangyu A1 Huang, Xun A1 Yang, Rui A1 Peng, Li A1 Gao, Li A1 Wu, Xinya A1 Zhong, Lei A1 Dong, Yan A1 Li, Bingxue A1 Ma, Weijiang A1 Liu, Aihua YR 2024 UL http://bmjopen.bmj.com/content/14/6/e083052.abstract AB Introduction Ixodes ticks are pivotal in transmitting diseases like Lyme disease and human granulocytic anaplasmosis, caused by Borrelia burgdorferi and Anaplasma phagocytophilum, respectively. These pathogens not only affect humans through single or multiple tick bites but also pose risks to animal hosts, leading to potential coinfections. Despite regional studies indicating significant prevalence, their global coinfection data remain sparse. This study aims to bridge this gap through a systematic review and meta-analysis of B. burgdorferi and A. phagocytophilum coinfections in Ixodes ticks worldwide. Addressing data limitations and study variability, it seeks to provide a nuanced understanding of coinfection patterns, their epidemiological implications and inform targeted prevention strategies.Methods and analysis Following Preferred Reporting Items for Systematic Review and Meta-analysis Protocols 2015 guidelines and PROSPERO registration, this study will undertake a thorough database search without constraints on language or publication date, using standardised screening and data extraction protocols. The quality and bias of studies will be evaluated using Joanna Briggs Institute tools. In the statistical analysis phase, conducted in R, we will initially determine the use of fixed or random-effects models based on the assessment of data heterogeneity. This choice will guide the framework for subsequent analyses. Within the selected model’s framework, we will perform subgroup analyses and meta-regression to investigate the effects of various factors, ensuring that each step is tailored to the initial model selection to maintain analytical consistency.Ethics and dissemination As this study does not involve clinical research or data collection from subjects, ethical approval is not required. We will uphold ethical standards in synthesising and reporting data. Study outcomes will be published in peer-reviewed journals, communicating findings to the scientific community and contributing to the understanding of Ixodes tickborne diseases.PROSPERO registration number CRD42023449735.